The issue about electric bike battery for bike kit

We purchased a electric bike kit including motor controller, hub motor wheel, throttle, brake lever and with 36V 12AH Lithium Ion electric bike battery that used for testing 36V solar charger from one supplier, not from leaf motor. After charging this electric bike battery for 10 hours by better solar power, full charged, we rode the bike, but hub motor wheel only run about 8km. Then we use 110-230Ac charger to charge this electric bike battery and full charged it. After test, we found this hub motor wheel is still lasted for around 8km.
We use a amperemeter in series to electric bike kit system, powered on and rode it. We got the current is about 5A. The RPM is 257RM.We use 26” hub motor wheel.
We calculate the speed is about 32Km/per hour.
See below formula:
（3.14×26”×0.0254）× 257RPM × 60 minutes ÷ 1000 (m-Km)=32km
If this is 12Ah battery, per hour lost 8ah.We can use 1.5 hours.
See below formula:
12Ah ÷ 8ah/per hour= 1.5hours
We think full charge this electric bike battery per time, the hub motor wheel can run about max 48 km. 32km/per hour × 1.5 hours = 48 km
There is definitely a problem with this electric bike battery, I’m not sure whether electric bike kit is because of the solar charging or our testing, or if it has a fault. But I need a replacement electric bike battery asap, because we don’t have any more 36v electric bike battery, and we sold 1 set of electric bike kit with li battery last week. I think BMS inside this electric bike battery no problem. The problem comes from the li battery cells. Maybe this electric bike battery had stayed in warehouse for a long time and haven’t charged it. It will make the electric bike battery cut down the achieve distances and use life.
So if solve this problem and let my hub motor to work asap, only replace all cells or replace new electric bike battery.
We are angry with our supplier, sent them many emails and no any reply.
Thank you, leaf motor. Help us found the electric bike battery ‘s problem. We are going to order leaf’s products in near future.
Hub motor, electric bike battery, electric bike kit supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com

make a 48V hub motor electric bike kit work at 36V

I have recently bought a DIY electric bike kit  from you, where I have bought a 36V battery and a 48V hub motor & brushless motor controller. I thought that when I ordered from your online internet shop, you would check, that the electric bike kit system would work..

On the homepage you write, that I can force the 48V hub motor controller to work with lower voltages.Also, the 48V thumb hub motor controller does not work. The twist controller works.
I have called your office and found out, that the problem is, that the 48V hub motor controller cuts off the electric bike kit system to protect the li battery. And the only solution is to manually override the system, but that is not an ideal way to operate the e-bike.

I have now ordered a new hub motor controller and thumb throttle for 36V from your homepage. What I would like you to do, is to write on the package you send me, that the package you send me is a guarantee replacement.

I do not wish to discuss guarantee and other issues with you, it is much easier for me to order new parts, but I would like to avoid to have to pay customs and VAT again for the same things. Also it takes weeks before the goods get through customs.

I also have one more suggestion for improvement:Please put 2*2 nuts on the electric bike motor wheel to be able to secure them, because my front 48V 1000w electric bike motor wheel fell off while I was starting with the e-bike. (while driven by 36V, ½ power – where I pull the break lever, push the cruise control 5 times, and use the cruise control to operate the electric bike motor) Also it would be nice if you could specify how hard I should tighten the nuts on the electric bike motor wheel.

20Nm? 60Nm?, I would like to tighten them well, but I do not wish to brake the thread. My transaction ID of electric bike kit order is 3FA78294KK410865B

Hub motor,electric bike motor,electric bike kit supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com

fan hub motor three frequency high-voltage electric tricycle china application

S mine fan hub motor three frequency high-voltage electric tricycle china application   Abstract: A crystal by controlling the frequency control to achieve a level, no level adjustment in the electric tricycle china installation and large-scale mine owners hub motor in the application. Keywords: three-conversion,electric tricycle installation Specificity due to the production of coal, the mine ventilation system related to mine safety in production, so the ventilation system in the coal production has a pivotal position. As long supply line, starting pressure drop, maximum protection devices for safe and reliable start-up and standby hub motor starter switch, the top priority is to enhance the system reliability.Coal Mine in NZ in November 2006, new investment and operation of the main fan hub motor for the GAF-type axial hub motor (check the hub motor by the largest coal mine in Asia through hub motor). The main fan motor 10KV 5000KW bldc motor asynchronous motor. In order to better address the project encountered in starting the impact on the grid, and the problem of load impact, the system used by the Power Electronic Co., Ltd production of three self-developed high-voltage electric tricycle china frequency equipment. 1, electric tricycle several Starting device Divided by the motor starter schematic: 1, reduced voltage starting methods. Traditional vacuum motor starting methods are Y-Δ start, decompression starting autotransformer, reactor start-up and so on. These methods belong to a class start decompression start, there are obvious shortcomings, the process of starting a secondary impact of current. The current high-pressure common way for liquid resistance starter starter, SCR series decompression start. 2, variable frequency start method. With the development of IGBT technology, high frequency voltage levels and larger capacities, but because of the price factor has restricted its development. Power Electronic Co., Ltd., on the basis of the SVC successfully developed three high frequency electric tricycle china, it has three characteristic frequency stepless regulator. 2, three frequency high-voltage electric tricycle china technical principles and characteristics High-voltage soft-start power supply and motor in series between the main circuit shown in Figure 1.   Figure 1 Main circuit diagram Three frequency high-voltage soft-start technology, the first SCR in series, then by controlling the conduction angle of SCR to achieve a level FM, and non-polar voltage regulator functions. Starting early by controlling the valve in the SA, SB, SC was to achieve a turn-on frequency 12.5HZ, the motor of 1 / 4 the rated speed when the control valve SA, SD, SE switch to 25HZ, the motor to achieve 1 / 2 rated speed, through the control valve SA, SB, SC to complete the full range of the switching process, and ultimately reach the rated speed, the bypass is closed off electric tricycle china trigger pulse to complete the starting process. Throughout the starting process in the three frequency points, while adjusting the frequency, change the output voltage to maintain constant voltage to frequency ratio, so that you can ensure that the entire starting process, the starting torque to keep the rated torque of 80 -90%, while the starting current can be controlled at about 2 times the rated current. Starting torque, starting current, is a three-frequency high-voltage electric tricycle china's largest technical characteristics. 3, S miners fan motor in the practical application. Coal Mine S is a new mine, it's power capacity is 35KV, 10000KVA, because the grid is responsible for the underground, Inoue electrical equipment supply, so the grid is relatively small margin, in order to ensure the process does not affect the start Other devices running on the main fan starting current requirements are very strict. And because it is located in the high-gas area, which uses negative pressure was high winds axial hub motor (two-stage fan is currently Asia's largest mining axial hub motor), the main fan motor power of 10KV, 5000KW. Throughout the starting process, showing the starting torque, starting current, a smooth start, the advantages of starting a short time. Measured data in Table 1.

Newest leaf hub motor

BRAND NEWEST LEAF BIKE 2013 Version Black Lightning Brushless, Gearless hub motor !

New ULTRA powerful and efficient Gearless motor custom made with higher grade laminations, wider magnet stack, high speed NSK bearings, Honey well hall sensors, more copper fill, and all out higher performance. We went through all the stops to make this motor the absolute best hub motor on the market.

This hub motor has the more acceleration at low end, better mid range, and more top end.  These hub motors can handle up to 50A loads at 48V, and can take higher voltage with the right controller.  This motor will go nearly 80 MPH on 72V!

Also offer this wheel professionally laced into our double wall aluminum rims with 12g spokes.  Message us for details. 14", 16", 18", 20", 24", 26", 700c and 28" sizes are available.

Detail:

Size: 14", 16", 18", 20", 24", 26", 700c and 28" hub motor wheel

Rim: 14", 16", 18", 20", 24", 26", 700c and 28" double wall alloy

Spoke: 12 gauge × 36 pcs

Motor Type: brushless gearless dc motor with hall sensor

Voltage: 48V

Power: 1000W

Efficiency: 90.5%

Max speed: 731RPM

Mechanical brake: Disk or  V

Cable location: shaft end , right

Cable length:100cm(front) -- 150cm(rear)

Install: spacing of 100mm front -- 135mm rear fork

Noise: < 60 db

Surface: Black painted

Net weight: 6.5Kg / 14.4 lbs

Compare below performance data.You will find leaf newest motor saving 10% of electricity, improve the efficiency of 8% With The Newest Materials Steel Rotor.

How to count speed as RPM? For example: 20 inch hub motor,max speed:731RPM

* ONE cycle= 3.14 × 20inch × 2.54( 1 inch = 2.54 cm) = 159.5cm ÷ 100 = 1.6 m( 100 cm=1 m )

* 1.6 m × 730RPM = 1168 m ( ONE minute )

* 1168 × 60 = 70080 m =70 km ( 1000m = 70 km)

* 70 ÷ 1.667 = 42 mph

a little problem with hub motor kit rim

I received bike conversion kit with new version LCD motor controller, hub motor wheel and bike parts ..everything but the lithium battery , started to mount a tire on the hub motor wheel rim and I think there might be a little problem with it the hole for the tube is in between where the spokes cross, making it almost impossible to get the inflation valve on the stem. I might be able to drill another hole on the other side between where the spokes go apart so it will work, haven’t looked into that yet the hole for the valve stem should be where the spokes are going away from it, so the valve can be fitted on easily. I have a few tools and a reamer so I probably can make it work. I was going to put one of these airless no-flat tubes in, its solid foam, but I think nice you get it on that’s it, you have to cut the tire to remove it after the tire wears out
I got a regular tube on and inflated it, but once it inflated the stem pulled so far down into the rim I get the valve back on it now.
I can’t get the valve back on, but it looks like it has enough air, hopefully it will hold it
anxious for the lithium battery to com now so I can try the motor out
I was looking at your metal case that the lithium battery goes in. on some other site it looked like the same case, but it had a theft vibration alarm when you turned the key and pulled it out, to keep it from being stolen. that looked like a good idea. I thought the theft alarm would be a good idea . The battery is so valuable. It might be a good idea for you to put one in the lithium battery case with a vibration sensor and maybe a 120db buzzer or something. the batteries are so expensive
I can see it being a good feature to add to all of the hub motor controller.
I think some sort of vibration alarm on the bike to detect tampering with such an expensive lithium battery would be a good product service for your customers
Be hard for them to run with the lithium battery when it is screaming at 120db they would be noticed kind of like a bump alarm on a car, when someone tries to break into it
I think going to find one for my recumbent bike conversion kit trick, the hub motor trick is worth over $2000 and now with the motor and battery another $1000
I am cautious about parking it even though its locked and chained down, someone might try and take the battery or hub motor controller off
I have a bracket under the seat with enough space to mount the plate and battery I think
that’s where they had one on another hub motor bike conversion kit at the dealer I bought the bike conversion kit from it was a low power motor and only 10ah lithium battery.
It would not pull the bike until you got moving about 5mph.Does the slipping plate come with the lithium battery case?
The hub motor they had on the electric bike at the shop was only 250w, 36v, it didn’t have enough torque to push the e-bike till you got it moving along with the pedals.

Leaf hub motor bike kit is working

Q: The bike conversion kit system is now working.
Still have some questions. It is about the brakes.
If we take the red and black wires from the scooter brakes and connect in parallel to the connection of the new hub motor controller, will this have a negative effect on the controllers? My friend thinks that this should not be a problem since this only brakes a circuit.

A: About that brake has two types.ONE is high voltage to brake.The other is low voltage to brake.
Ours is low voltage to brake,you should check your old hub motor controller whether that is low voltage to brake.
If you have volt-meter,you could get about 5V from red and black wires from your old hub motor controller.If it's 5V.That's no problem to parcellel.

Q: We finally got the chance to try the new bike conversion kit wheel after doing all the modifications except for the front brake which we still have to modify.

We have a new problem and I need your expertise. I tested the bike conversion kit wheel up the hill and on its own (without using the rear wheel motor). It went up the hill at about 17 km/hr……..which I think it is satisfactory.

However when I took it up a steeper but very short incline which is on my way home, the fuse connected to the batteries got blown (caput) and lost power (no electricity).

The fuse is gauged at 10A. What should I do to avoid blowing out the fuse? If I change the fuse to a different amperage, will this have negative consequences for the rear motor? Do you suggest anything different?

As always, appreciate your assistance.

A: When up the hill,the current will reach about 15A.If too steep hill,it will reach more than 20A.

20A-30A current is easy to break controller.

Sometimes 15A continuous current for about half an hour also can break controller that's because of too hot will break hub motor controller's MOSFET.

We suggest:

* Cool controller is important. 

* When you up hill,use two hub motors.On the flat road,use one motor.

Our hub motor bike conversion kit can't get any problem when your up any hill.But should cool controller.

Use 15A-20A fuse.Had better to use 15A.But if use 20A fuse,climb hill has more power.But we worry controller.

Electric hub motor and brushless dc controller information

Q: We are interested in using your bike conversion kit in this project, however, due to specific project requests, we have the following questions.

First question: Do you have any brushless DC controller which allows hub motor rotation inversion?

Second question: Could you send us some documentation containing information about the brushless DC controller for the 48V/1000W bike conversion kit ? (i.e. pin description) 

Third question: We have found two hub motor models over 1000W of output power (BLW-16B and BLW-20B) in your leaf motor website. However, in the performance datasheet of the BLW-16B, the maximum output power mentioned is 1037.32W. Is there any motor with output power of 2000W (we need to reach 60 Km/h)? Do you have a different brushless DC controller for these electric bike motors?  

Fourth question: We would like to use your LCD in our project. Is the LCD independent of the brushless DC controller? What are the inputs necessary to the LCD to display the information (speed, voltage, mileage etc.)?

A: We have 24V 250w, 36V 250w.36v 750w‚ and 48V 1000w LCD controllers to drive our brushless electric bike motors.

If you need 48v 1000w motor for e-bike. Generally, choice HBL motor.

That BLW-16B and BLW-20B are used for e-motorcycle, e-tricycle.

The power can reach 2000W, Speed:>60km/h    

The performance data you saw show Max 1037.32W.Because we test this BLW-16B through 48V 25A 9-MOSFET controller.

This hub motor had better to use 48V 15 MOSFET or 18 MOSFET controller to test.

Now we have 48V 15MOSFET BLDC motor controller to drive this hub motor, but no led.

BLW-16B and BLW-20B are the same hub motor, the difference between them is casted hub.

BLW-16B is 10 inch casted hub and uses 16 - 4.00 inch tire..

BLW-20B is 12 inch casted hub and uses 20 - 4.00 inch tire.

Our LCD must work with our BLDC controller, don't input anything. There is a signal wire to test speed. Just set the size of wheel.

When electric bike kit system works, LCD will display speed, battery gauge, mileage..

Q: Probably we are going to use the BLW-20B hub motor. We are designing an e-tricycle which should allow the driver to move back and forward. It means that we need a BLDC controller which allows the motor to rotate in two directions. Do you have a controller like this? In case you do not have, we are interested in using your LCD to a different controller (we have already found a controller that allows two direction rotation). Is that possible?

A: We have 48V 15-MOSFET brushless controller that can forward and reverse (two direction rotation),but No LCD now.

Now 48V 12-MOSFET can work with LCD, but it's hard to drive this BLW-20B when power more than 1000w hub motor.

Now few customers order this 48V 15MOSFET controller for bike conversion kit.

How to connect wires with leaf 1000W hub motor electric bike conversion kit

I have wired up some items to my bike, but I am unsure how to wire certain things up. Please view the pictures to see what I mean: Attachment called - Controller Wires - Which color to which color of the hub motor do I connect to ? There are three thick wires on the BLDC Motor Controller that look like connectors to they connect to the motor. Unfortunately, I do not know what color to map them to. I did connect blue to blue and green to green, but the wheel responded briefly, then the LCD screen shut off.. I would have to switch the power off and on again for it to come back. I have not gone any further as it gave me the impression I could do some damage if I continued. Attachment called - Bike Motor - Which colors connect to the colored wires of the brushless hub motor Controller This is the connectors on the hub I need you to identify for the Controller, which wire connects to what? Connecting the green to green, black to black, there is another yellowish/greenish wire on the motor that has no equivalent colored wire on the controller. The controller has a black think wire - does this yellow/green wire connect to the black? Attachment called - Light Switch & wire I do not know what this is and what it is used for - I presume a light to work from the battery. Where do I wire this to? Does it connect to the BLDC motor controller? if so, where. I found your video's quite difficult to follow as it is difficult to work out what is connected to what and how and I do not see anyone triggering anything to start the electric bike motor wheel when it starts working. Would you be able to send me some diagrams or written instructions on setting this up from scratch? See attachment ‘BLDC Motor Controller Wires’: The green and blue wires are present on your diagram, but the thick black one isn’t – where is it supposed to go? The other attachment ‘Motor Wires’: There is a Dark green wire, Dark Blue wire and a Yellowish Wire (I say yellowish as it seems to have a hint of green in it – in other words it is not too clear).. The green and blue I can match to the green and blue on the brushless hub motor controller, but what about the Yellow/green wire? I have attached these wires in various combinations, with the power coming on and empowering everything other than the wheel. The electric bike motor wheel will ‘shudder’ when I slightly twist the throttle but the whole thing will shutdown and I will have to turn off and on again to get it back. I did this a few times with the same result. I rearranged the wires again, with all items turning on, but the bike motor wheel did not respond. I eventually realised the controller wire heating up and turned everything off. I have left it for a while, but when I tried it again the power did not come on any device.

12 inch BLDC hub motor for electric bike ?

I'm in need of a simple installation electric bike motor for a special application. The subject BLDC motor look that will perfect fit our needs. I am ready to order the first to complete the prototype, but will appreciate your advice if will work properly under the following conditions: 1. Max torque 15 Kg-m 2. Speed 0 to 10 Km/ h 3. Distance between charge batteries 5 Km Important is smooth start motion (no shaking) I understand the HBL-12" 24V 250W hub motor is good for the working conditions On your internet site for this size electric bike motor there is technical performance for the 36 V model only. I need only 5 Km range between battery charges.But very important is the star movement from stop (0 Km/h) very smooth, slowly start to move otherwise possible damage of the airplane nose wheel if start move quickly and shaking. Then the question, will 36 V brushless hub motor be better than 24 V ?Since 36 V have smaller currents I have the feeling will perhaps be better starting to move more smooth and slowly... Will be great the customized low speed. But please note that this special application, not yet a commercial product, then in the last phase of development. Will you customize low speed electric bike motor at the present stage of just one unit ? Looking all your products, the choice was your Model:HBL-12" 24V 250W hub motor because so simply installation. But also, although is not our preferred solution because much more complicated installation, could be your Stepper DLDC motor, which in this case the speed can be defined by the ratio of the gears, and the diameter of the wheel (which in our case is important to be small since the device shall be below the airplane... Max 12 inches but smaller is better...) Maybe the Stepper DLDC motor have the advantage of very smooth start motion ? It is our concern to have a very slow and smooth start motion... Actually from your specifications you give for the max torque of 16000 (the point we are most interested) 243 rpm at 18 Amps, which is for a 12 inch wheel about 14 Km/h, then is very near our 10 Km/h. We believe, if we do not read wrong your performance data for the 36 V HBL 12 inch electric bike motor as it is specified is OK... Please correct me if wrong. The fact that the motor will be capable of much high speed we believe should be not a trouble, we can easily put a limitation of the speed. Still extremely important is the smooth and slow increase speed from 0 Km/h (stop) with no shacking,but we understand this is related to the BLDC motor controller, which we will test but feel should be not a problem. We need as precise as possible to control smoothly the speed from stop 0Km/h to max 10 to 15 Km/h... with slow increasing speed and keep low speed 2 to 5 Km/h .Then NOT AT ALL "on" and "off" ! Another important issue is the torque. We need minimum 15 Kg-m torque, better if 20 Kg-m... ( 147 to 196 Newton meter)- Here is a big doubt with the numbers on your performance data since indicated mN.m 16000.0 ? if lower figures could be difficult start motion when in surfaces as grass. Then I need to order not only the hub motor but also the relevant BLDC motor controller and electric bike battery. When you say 36 Volts make no difference but preferred in Europe. I choice 36 Volts... as you say... but if 24 Volts is better, off course we change to 24 Volts... we need the better solution. Normally the device speed shall be about 5 to 8 Km/h... for safety reasons... and torque between 147 to 196 Newton meter at 0 Km/h to start motion. Hub motor, BLDC motor, bike motor, electric bike motor supplier: Leaf Motor Technology Co., Ltd Website:https://www.leafmotor.com/

2000w electric bike hub motor kit for e-motorcycle

2000w electric bike hub motor kit for e-motorcycle Q: I am going to build an electric motorcycle prototype in Russia , I am looking for electric bike kit parts with bike motor and lithium battery. A: How many motorcycle motors would you like? If just need 1-2 sets of hub motor sample. The shipping fee to Russia by air or express is too expensive. Q: I first need one set of hub motor kit for test. It’s okay for the shipping price. I also can arrange the shipping. I need bike motor controller. What’s the top speed of 20 inch 48V 2000W hub motor and 24 – MOSFET bike motor controller? What’s the peak watts for this hub motor? What’s the peak ampere current for this 24 – MOSFET bike motor controller? What’s the FOB price for 200 sets of bike kit (hub motor & bike motor controller)? What’s the warranty time? A: 20" 2000w bike kit (48V 2000W hub motor with 24-MOSFET bike motor controller) 1. Top speed:70km/h 2. Peak watts for this hub motor:2500W (Work at 48V,bike motor controller is limited current:60A) 3. This 24-MOSFET bike motor controller, peak ampere:60A 4. $380USD/set (ONLY this hub motor with 4.00-12" tire and controller) FOB Shanghai. 5. ONE Year warranty. The price for 1 set of sample (hub motor & bike motor controller) is 693USD, not including shipping fee. About hub motor performance and bike motor controller, we can customize as your order. Q: Could you make custom this hub motor and bike motor controller peak current 100a-120a? Is the wheel of this hub motor is 20 inch? What is the hub motor speed on 1000W? A: Customize 120a bike motor controller is okay. But it cost more. After install 4.00-12” tire, the diameter of hub motor tire is 51cm. That’s 20 inch wheel. Hub motor speed is about 58km/h on 1000w. After packing this bike kit ( hub motor + bike motor controller + throttle + brake lever + switch ) is 18.7kgs. Q: This hub motor on 2000W: the 2000w is the continuous watts power? What’s the peak watts power for this hub motor? Could this hub motor be installed 180mm disc brake? A: Peak watts for this hub motor: 2500W (Work at 48V, bike motor controller is limited current:60A)If work at 48V 100A bike motor controller, it can reach max 3000W. This hub motor can work at 48V-72V. We can make this hub motor with disc brake. But maybe only 200mm disc brake for this hub motor. Hub motor, bike kit, bike motor supplier: Leaf Motor Technology Co., Ltd Website:https://www.leafmotor.com

issue about electric bike kit battery

We purchased an electric bike kit including motor controller, hub motor wheel, throttle, brake lever and with 36V 10AH bottle style Lithium Ion electric bike battery that used for testing 36V solar charger from one supplier, not from leaf motor. After charging this electric bike battery for 10 hours by better solar power, full charged, we rode the bike, but hub motor wheel only run about 8km. Then we use 110-230Ac charger to charge this electric bike battery and full charged it. After test, we found this hub motor wheel is still lasted for around 8km. We use a ampere meter in series to electric bike kit system, powered on and rode it. We got the current is about 5A. The RPM is 257RM.We use 26” hub motor wheel. We calculate the speed is about 32Km/per hour. See below formula: （3.14×26”×0.0254）× 257RPM × 60 minutes ÷ 1000 (m-Km)=32km If this is 10Ah battery, per hour lost 8ah.We can use 1.25 hours. See below formula: 10Ah ÷ 8ah/per hour= 1.25hours We think full charge this electric bike battery per time, the hub motor wheel can run about max 40 km. 32km/per hour × 1.25 hours = 40 km There is definitely a problem with this electric bike battery, I’m not sure whether electric bike kit is because of the solar charging or our testing, or if it has a fault. But I need a replacement electric bike battery asap, because we don’t have any more 36v electric bike battery, and we sold 1 set of electric bike kit with li battery last week. I think BMS inside this electric bike battery no problem. The problem comes from the li battery cells. Maybe this electric bike battery had stayed in warehouse for a long time and haven’t charged it. It will make the electric bike battery cut down the achieve distances and use life. So if solve this problem and let my hub motor to work asap, only replace all cells or replace new electric bike battery. We are angry with our supplier, sent them many emails and no any reply. Thank you, leaf motor. Help us found the electric bike battery ‘s problem. We are going to order leaf’s products in near future. Hub motor, electric bike battery, electric bike kit supplier: Leaf Motor Technology Co., Ltd Website:https://www.leafmotor.com/

electric bike conversion kit battery

Q: After order hub motor wheel bike conversion kit with battery. When could you ship this electric bike battery . Is it only one blue packing plastic battery like the one you send me a picture of that one fix on to my frame I just need to hold it with zip ties. Dose this electric bike battery have a on and off switch. or is it a pack with like 2 battery's in a bag? 
A: This blue packing plastic battery doesn't have ON/OFF switch. Only frog/bottle style battery has this key or ON/OFF switch.
If you need 36V bike kit system, You can order frog/bottle battery.
Frog battery is easy to hold on your seat-post, don't need to drill two holes on your frame.
 We sell lithium battery, it's lighter."2 battery's in a bag" that is 24V sealed lead acid battery. It's very heavy and cheap.
Q: I didn't read the last sentence I don't want batteries In a bag because it is to big then I need the rack I don't like racks. I sent it from my IPod I drop it and catched it and I press the send bottle. So I was saying I don't like the rack, but with the blue packing plastic battery 48v 10ah  is it one pack or 2 pack that comes with the kit, and Connect to the controller. The one you Send is just one, it has 2 wires on each side is that the one that comes with the kit. and how can I turn it off and on the bottle battery is to big and long.
A: 48V 10Ah is one pack that is made up of many cells with BMS.
If we order our hub motor bike conversion kit and electric bike battery. We first to ship bike conversion kit in 24 hours. Any lithium battery should be customized as order. Because electric bike battery is different from other goods. It has use life. It takes about 7 days to customize.
There are one positive wire, one negative wire and one plug for a charger. Turn off should disconnect wires. Sure, also can connect a switch to control it(ON/OFF)
Q: There isn't the pass used for how hard you pedal, if you pedal hard hub motor will go faster. what about if I don't install the pas and I pedal will it go faster or will it go at the same speed, also if I install the pas can I still go fast with out pedaling, or do I need to keep on pedaling to go fast with the pas up hills. 
A: Our hub motor bike conversion kit can work with throttle/pas.
If both install throttle and pas.
1.If you pedal it, don't use throttle, pedal faster, hub motor wheel run faster.
2.If you twist throttle, don't pedal.Twsit more, hub motor wheel faster.
3.If you twist throttle and pedal together, only one decide speed.

When you ride on the road or up hills, most of time use throttle, don't need to pedal. Sure, if you need to do exercise. Please pedal more.
Bike conversion kit, hub motor, electric bike battery supplier: Leaf Motor Technology Co., Ltd
Website: https://www.leafmotor.com/

How to build a geared hub motor for bike kit

These days 250w hub motor wheels are popular with European. Nearly all of hub bike motor are brushless geared. Because there are several gears inside hub. It has more powerful than 250w brushless geared motor. Order 1 set 12" 14" 16" 18" 20" 24" 26" 700c 28" inch hub motor bike kit , convert your common bike to e-bike is so easy. Directly front or rear drive your bike. The important part is an engine -hub motor. How to build this? There are some differences with brushless gearless hub motor. Step 1: winding Calculate motor power, speed RPM and confirm what type of copper wire would you use, wind copper wires by handwork or machine, each notch should be separated by insulating paper so that not shot circuit between the coil. It takes about 1 hour to done it by handwork. And should use rubberized fabric to wrap your fingers. Nipping copper wires will break your fingers. Step 2: fix axis into motor Put axis into rotor winding and use a key to fix axis. Use A-B glue to paste three hall sensors on hub motor rotor, put 9-pin (three pin/each hall) into PCB and use insulated wire to fix it. Put 8-pin cable inside the axis and heavy yellow, blue, green wires to connect the three copper wires(Phase A,B,C) separately. Thin red, black wires are be weld to PCB + and - . Step 3:soak paint After winding should soak paint in order to be insulated. Use brush to put the insulated paint on the winding and make sure be soaked everywhere. It takes about 24 hours. Step 4:press gear into hub Use presser to press steel 90-gear into hub. This hub with one side cover. Step 5:fix three gears Use retainer ring and key to fix three white nylon gears on one steel 21-gear. Step 6:fix magnet Fix magnet inside the hoops. Step 7:install rotor winding into this magnet hoops. Step 8:install there gears on the axis of this rotor winding and put inside of hub with 90-gears. Step 9:install the other cover. Use screw driver to tight screw nuts. Done it. Power on battery and use bldc motor controller to drive this hub motor. If no any strange noise. It's okay.Then according as the size of your bike to fit this geared spoke hub motor to 20" 24" 26" 700c 28" inch bike kit wheel. Hub motor, bike kit, bike motor supplier: Leaf Motor Technology Co., Ltd Website:https://www.leafmotor.com

How-to-build-a-hub-electric-bike-motor

These days hub electric bike motor wheels are used for e-bikes widely. Nearly all of hub bike motor are brushless gearless. Because of low noise, high efficiency, long life are popular with riders.
Order 1 set 12" 14" 16" 18" 20" 24" 26" 700c 28" inch hub motor kit, convert your common bike to e-bike is so easy. Directly front or rear drive your bike.
The important part is an engine -hub motor. How to build this electric bike motor?

Step 1: winding
Calculate motor power, speed RPM and confirm what type of copper wire would you use. Next is fix a rotor on the steel shelf, wind copper wires by handwork or machine. It takes about 1 hour to done it by handwork. And should use rubberized fabric to wrap your fingers. Nipping copper wires will break your fingers.
Step 2:soak paint
After winding should soak paint in order to be insulated. Use brush to put the insulated paint on the winding and make sure be soaked everywhere. It takes about 24 hours.
Step 3:press axis into rotor
Put axis into rotor winding and use a key to fix axis. Use A-B glue to paste three hall sensors on hub motor rotor, put 9-pin (three pin/each hall) into PCB and use insulated wire to fix it. Put 8-pin cable inside the axis and heavy yellow, blue, green wires to connect the three copper wires(Phase A,B,C) separately. Thin red, black wires are be weld to PCB + and - .
Step 4:paste magnet
Paste magnet inside hub, one N pole, next S pole ..one by one. More magnet, higher torque, more power. The height of our magnet is 30mm,6mm higher than other hub motor. In market,24mm high magnet only build max 500w electric bike motor. So our bike motor works at 36V can reach 750w.
Put the rotor winding inside the magnet hub, be careful hand. It has powerful magnetism.
Step 6:install two covers
Before installing both covers, we should press bearing into cover. Use hexagon wrench to tight screw nuts. When you hear "poop" from electric bike motor. That means install correctly. Done it.
Power on battery and use bldc motor controller to drive this hub motor. If no any strange noise. It's okay.
Hub motor, electric bike motor, bike motor supplier: Leaf Motor Technology Co., Ltd
Website:https://www.leafmotor.com

Hub motor was very sluggish

Question:While trying to get the hub motor up and running here we have run in to some problems. After installing the hub motor wheel in the fork it was very sluggish to turn and took quite a bit of effort, not freewheeling at all. The first time we plugged the battery (fully charged 48V 12AH LiFePo4 at 52.9V) in to hub motor (without the throttle connected to the controller cable) the hub motor beeped three times. When we hooked up the controller cable black and yellow pin connectors to the corresponding ones on the throttle there was no response from the electric bike motor , but the battery level lights did light up. We tried both throttles sent with the same results.
As it was the weekend I went to the forum and looked there for assistance. I received some good feedback that the 3 beeps we heard were a signal that the throttle was not functionable which is what we found as soon as we hooked up the throttle. We have checked all the leads for correct amperage as per his instructions with positive results.
I am assuming that electric bike kit is bench tested before it leave there? The packaging was undamaged upon delivery and all seemed in good order upon receipt. If you could please advise us on what to do to get this resolved we would appreciate it as we want to get on with our trials here to be able to get out product to market by summer.
I have checked my throttle and hub motor controller wires against your PDF diagram and there seems to be some discrepancy? I wish my camera was working but I will describe my findings. Diagram Throttle Black 3 pin shows: Red? perhaps Orange?/White/Blue Our Throttle Black 3 pin has:
Orange/White/Black from core with black jump to yellow 2 pin Diagram Controller Black 3 pin has: Red? perhaps Orange?/black/Yellow Hub Motor Controller Black 3 pin has: Rust from Core with Red Jumper to PAS White three pin/White/Black from core with Black jumper to yellow 2 pin
I checked the 8 pin connector again and can’t see that it isn’t making good contact. No bent pins or obstructions.Electric Bike Motor still beeps three times upon connecting to full battery as described with and without full connections of cables.
Yes jumping the two holes as indicated does make the electric bike kit run. It seemed like at first that by moving the controller wire that the electric bike motor would stop and start as if there was a short right at the junction and we thought that might be the problem. We hooked up the cable but I still am not getting any response from either throttle when hooked up to the black two pin connector even if I move the cable at the junction and now using the jumper the short method that issues seems to have gone away?
We are trying hard to make this electric bike kit work here but I have to admit we are getting a bit frustrated. The throttle cable while hooked up shows 5.0 amps on the red wire and from .8 amps at rest and 3.8 amps on the white wire when at full throttle like it should? Without the black pin connector together there are 5.0 amps at the red wire and .1 amps at the white wire if that is any useful information.
Hub motor,electric bike motor,electric bike kit supplier: Leaf Motor Technology Co.,Ltd
Source:https://www.leafmotor.com

The issue about 250W hub motor electric bike kit

Bought 1 set of electric bike kit from one supplier in China two months ago. Sent more than 10 emails, haven’t gotten any reply. I met below issue, hope solve it.

When I was riding my electric bike three weeks ago, the 250w mini front hub motor suddenly started to make a strange and strong noise. If I try to turn the twist throttle on when the e-bike doesn’t have any load, I keep the hub motor wheel in the air. The electric bike motor works fine and electric bike kit does not make any noise.

However, if I try riding my electric bike and turning the throttle on, the electric bike motor starts making a strong and continuous noise. I tried to riding my bike keeping the brakes continuously pressed and any noise appears so it seems to be some electric problem. It is very strange and I am so much worried.

I took off electric bike kit wheel and used screwdriver to disconnect six screw nuts, took apart hub motor cover and found there was a rotor-winding, two bearings, three sets of 42-gear, 1 set of 21-gear on the axis, 1 set of 81-gear on the hub. There wasn’t any impurity inside the hub motor. Re-install and test electric bike motor wheel, still have the same problem. Don’t know what’s the problem.

Contact my supplier many times and can’t get any reply. I looked for answers by google, yahoo and bike forums, still can’t find the correct answer. Yesterday I got a message from my US friend about there was a company, leaf motor can help me. So I sent an email to leaf motor.

Surprisingly just half an hour past, leafmotor replied me and asked me to check the bearings. How to check hub motor bearing? Take off two bearings from axis, and use little finger to hold inside of bearing, the other hand to turn bearing, faster, better. If you can hear some noise from bearing that can confirm the problem comes from electric bike motor ‘s bearing. At last, I found there was a bearing was broken. According as the bearing model, I bought two new ones in market and replaced them.

Test electric bike kit wheel in the air, no noise. Brake hub motor wheel, still no noise. Nice, Have sloved it.

I should thank leaf motor that help me and I found fun throught repairing electric bike motor. Now I decide to buy leaf ‘s electric bike kit if I have need and will recommend my friends to order leafmotor’s electric bike motor, bike kit…

Though I haven’t ordered any goods from leafmotor by now. But they are very professional, has best service and believe they have high quality products.

Hub motor, electric bike motor, electric bike kit supplier: Leaf Motor Technology Co.,Ltd

Website:https://www.leafmotor.com

power on the electric bike hub motor was gone

Electric bike hub motor kit was gone, how to solve it?

Received my electric bike kit .Product list:

1.26” 36V 250W front brushless geared hub motor wheel

2.36V 6-MOSFET brushless motor controller working with LCD(display speed,mileage,battery gauge..)

3.standard black twist throttle with battery gauge

4.brake lever with low voltage to brake

5.three button-ON/OFF switches that are used for control front&rear lights,cruise,horn…

Check rim whether in the middle of fork and the direction of hub motor runs.Then I have installed everything on my bicycle according as instruction manual and the electric bike kit worked fine.

I was running e-bike about 25km and then I stopped the electric bike motor . Charged the electric bike battery because I was staying there for some hours. Started on the way home and after some heavy hills (about 3 km)it was completely dead. The electric bike kit system was running like normal up to this, but suddenly all power on the electric bike motor wheel was gone.

Those three led lights on twist throttle for electric bike battery were still lit. I tried to turn e-bike off and on again, but same result.

Today the electric bike kit is still dead.

Do you have any idea? Measured 0,1 Ohm between the electric bike motor(hub motor phase wire: yellow, green, blue).Infinity between hub motor cable and hub motor cover. So it does not look like it is burned. The electric bike motor controller has 41,8 Volt input.

Measure the hub motor hall sensor:

Red, black, yellow, blue, green wires.

1.The voltage between red and black is 4.5V;

2.The voltage between yellow and black is 4.2V or 0V,(When use hand to turn hub motor, the voltage will change from 0~4.5V~0~4.5V)

3.The voltage between blue and black is 0.2V; (When use hand to turn hub motor, the voltage could not change)

4.The voltage between green and black is 0.1V. (When use hand to turn hub motor, the voltage could not change)

From above test data, I doubt there were two hall sensor inside the electric bike motor that were broken.

Electric bike hub motor kit was gone, how to solve it?

Hub motor, electric bike motor, electric bike kit supplier: Leaf Motor Technology Co., Ltd

Website:https://www.leafmotor.com