2012年7月24日星期二
20 inch hub motor conversion kit for electric bike
Q: I have looked at your leaf motor and want to buy one bike kit includes hub motor wheel, BLDC motor controller and twist grip throttle. I am looking at a 20 inch wheel with 1000 Watt hub motor, but I think that one may not be enough to handle the load. I am looking to build a three wheeled vehicle and look at the possibility that I may need to power
2 or all 3 of the BLDC hub motor wheels to achieve my goals. I am thinking of building two or three of these three wheeled vehicles. What can you do to help?
A: Thanks for you are interested in electric bike conversion kit . For my personal idea, use a 20" 1000w brushless hub motor to convert a front wheel, front drive is much better. If possible, order two sets of 20" 1000w BLDC hub motors with one high power brushless motor controller to convert two rear wheels - rear drive. It’s no problem with forward and reverse. But when you turn left or turn right, you will get a little trouble. Only under much lower speed can turn left or right.
Convert two wheels that is enough. If you always ride on flat road, only convert one front wheel.
Q: I was thinking the 20 inch 1000 Watt bike conversion kit as exampled.
What I had vision was to use 3 BLDC motor controllers, but using one on front and one larger for the 2 rear hub motor wheels may make things easier.
For turning it is easy to not worry about differential control on the rear wheels, such as turn radius larger than 5 M differential on the rear wheels is not consequential as centerline width is app 720 mm.
It would be very easy to turn the inside wheel off by disconnect, or turn the rear drive off all together and let the front wheel do the deep turning.
So what I need is real pricing for three sets of bike conversion kits includes three BLDC hub motors, two BLDC motor controllers. One 1000 W for front, and the other 2000 W for the two rear hub motor, or what is possible to have one 3000 watt drive to run three brushless hub motors?
Please note that the vehicle will need a lot of power to traverse some of the steep ramps and terrain.
It seems that the 1000 W hub motor seems to have app 17 Nm torque and that would mean that three would have just enough torque to carry the load.
A: We suggest you order below bike conversion kits :
1.3 sets of 20" 48V 1000W hub motors (one for front, the other two for rear hub motor)
2.1 set of 48V 1000W LCD BLDC motor controller to drive front wheel, LCD display speed, battery gauge.
3.1 set of 48V 2000W brushless motor controller to drive two rear wheel
4.2 set of thumb throttle, one of left side to control front wheel, the other on right side to control right wheel(when turning, loose right side throttle, just twist left side thumb throttle)
5.1 set of brake lever to control three controller, when press lever, all of three controller will cut off power
6.1 set of three button switch used to control reverse, horn, lights
Hub motor, BLDC motor, bike kit, bike conversion kit supplier: Leaf Motor Technology Co., Ltd
Website:https://www.leafmotor.com
2012年6月8日星期五
The hall sensor is a transducer that varies its output voltage in response to a magnetic field. Hall sensors are used for proximity switching, positioning, speed detection, and current sensing applications. Three phase BLDC motor has three hall sensors inside that are used for electric bike widely.
36V 250W brushless geared motor is popular in Europe, but in North America, people like 36V 750W hub motor more. More and more people order and enjoy these two types of DC hub motors that are called classic electric bike motors. Now they have received by most of customers because of good quality.
But when ride this hub motor bike and climb hill for a long time. Sometimes over current or over head will break motor controller's MOSFET or hall sensor.
Hall sensor is broken. The hub motor can't work. Unless your controller can drive sensor-less motor. Buy a new motor, cost more.
Replace hall sensor, cost less. Below we first instruct one type of 750w electric bike motor .
If hall sensor is broken, power on battery, you will find battery gauge works, horn works, lights work, everything is good, except when you turn your throttle, the hub motor wheel can't run.
Step 1:
Retest this hub motor and make sure it does be broken. Do you have voltmeter?
Still connect all wires and power on.
First measure 6-pin hall sensor plug, the voltage as below:
1.The voltage of red and black is about 4.5V;
2.The voltage of yellow and black is about 4.5V or 0V;(use hand to turn hub motor, the voltage will change from 0V-4.5V)
3.The voltage of green and black is about 4.5V or 0V;(use hand to turn hub motor, the voltage will change from 0V-4.5V)
4.The voltage of blue and black is about 0V or 4.5(use hand to turn hub motor, the voltage will change from 4.5V-0V)
If you can get above data it's no problem with bike conversion kit system. If the voltage of Item 2 (yellow and black wires)can't change from 0V-4.5V,Please replace this hall has a yellow wire connect.
You should prepare some tools and material:
1.Hexagon wrench (Necessary)
2.Hammer (Necessary)
3.Screwdriver
4.electric iron
5.A-B glue
6.insulated paper, insulated wire
7.scissors
8.New hall sensor
Step 2:
Take off nuts and gasket on axis and use hexagon wrench to loose 16 screws.
Step 3:
Make the electric bike motor stand and cable is bent inside. Left hand hold the hub motor and use hammer to knock the axis.
Step 4:
After some knock, the cover will take off hub.
Step 5:
Use the same way to knock the other axis, the other cover will also take off hub.
Step 6:
When both side covers are off hub, next we should take out the rotor-winding. Make the axis stands on the ground, both hands press hub motor, the rotor-winding will out of hub.
Step 7:
There are three hall sensor in three grooves around the rotor.
Use scissors to remove insulated wire and insulated paper. You will find 9-pin(three hall sensor)connect to PCB on rotor-winding. Each hall has three pin: 1:+ , 2:- ; 3:signal
For example:
Hall A: 1:+ , 2:- ; 3:Yellow wire
Hall B: 1:+ , 2:- ; 3:Blue wire
Hall C: 1:+ , 2:- ; 3:Green wire
Step 8:
Just now had known yellow wire hall sensor was broken. Please use electric iron to remove Hall A and use A-B glue to fix new hall sensor. Use insulated paper, insulated wire to fix PCB. Then re-build this hub motor.
Step 9:
Test as step 1.If can get the data from each hall sensor. Congratulate.
Power on battery, the hub motor wheel works.
Hub motor, BLDC motor, electric bike motor supplier: Leaf Motor Technology Co., Ltd
Website: https://www.leafmotor.com/
36V 250W brushless geared motor is popular in Europe, but in North America, people like 36V 750W hub motor more. More and more people order and enjoy these two types of DC hub motors that are called classic electric bike motors. Now they have received by most of customers because of good quality.
But when ride this hub motor bike and climb hill for a long time. Sometimes over current or over head will break motor controller's MOSFET or hall sensor.
Hall sensor is broken. The hub motor can't work. Unless your controller can drive sensor-less motor. Buy a new motor, cost more.
Replace hall sensor, cost less. Below we first instruct one type of 750w electric bike motor .
If hall sensor is broken, power on battery, you will find battery gauge works, horn works, lights work, everything is good, except when you turn your throttle, the hub motor wheel can't run.
Step 1:
Retest this hub motor and make sure it does be broken. Do you have voltmeter?
Still connect all wires and power on.
First measure 6-pin hall sensor plug, the voltage as below:
1.The voltage of red and black is about 4.5V;
2.The voltage of yellow and black is about 4.5V or 0V;(use hand to turn hub motor, the voltage will change from 0V-4.5V)
3.The voltage of green and black is about 4.5V or 0V;(use hand to turn hub motor, the voltage will change from 0V-4.5V)
4.The voltage of blue and black is about 0V or 4.5(use hand to turn hub motor, the voltage will change from 4.5V-0V)
If you can get above data it's no problem with bike conversion kit system. If the voltage of Item 2 (yellow and black wires)can't change from 0V-4.5V,Please replace this hall has a yellow wire connect.
You should prepare some tools and material:
1.Hexagon wrench (Necessary)
2.Hammer (Necessary)
3.Screwdriver
4.electric iron
5.A-B glue
6.insulated paper, insulated wire
7.scissors
8.New hall sensor
Step 2:
Take off nuts and gasket on axis and use hexagon wrench to loose 16 screws.
Step 3:
Make the electric bike motor stand and cable is bent inside. Left hand hold the hub motor and use hammer to knock the axis.
Step 4:
After some knock, the cover will take off hub.
Step 5:
Use the same way to knock the other axis, the other cover will also take off hub.
Step 6:
When both side covers are off hub, next we should take out the rotor-winding. Make the axis stands on the ground, both hands press hub motor, the rotor-winding will out of hub.
Step 7:
There are three hall sensor in three grooves around the rotor.
Use scissors to remove insulated wire and insulated paper. You will find 9-pin(three hall sensor)connect to PCB on rotor-winding. Each hall has three pin: 1:+ , 2:- ; 3:signal
For example:
Hall A: 1:+ , 2:- ; 3:Yellow wire
Hall B: 1:+ , 2:- ; 3:Blue wire
Hall C: 1:+ , 2:- ; 3:Green wire
Step 8:
Just now had known yellow wire hall sensor was broken. Please use electric iron to remove Hall A and use A-B glue to fix new hall sensor. Use insulated paper, insulated wire to fix PCB. Then re-build this hub motor.
Step 9:
Test as step 1.If can get the data from each hall sensor. Congratulate.
Power on battery, the hub motor wheel works.
Hub motor, BLDC motor, electric bike motor supplier: Leaf Motor Technology Co., Ltd
Website: https://www.leafmotor.com/
2012年5月26日星期六
Spokes for hub motor bike conversion kit
Q: I ordered a 750W hub motor last month. Now I am going to fix a 20 inch bike motor wheel. Are there standard spokes with nipples I can order on leaf motor online anywhere as order bike conversion kit ? If so- where ( what ’s the standard, exact measurements ) ?
If I order from you, what would be the price?
A: It's very difficult to replace spokes for hub motor ,there are not standard ones.
The length of spoke is lie on the dia.of hub motor and bike rim.
Ours are double alloy rims,20" rim: eyelet to eyelet is 360mm.
If you order rim and spokes with nipples,just costs $30USD,but the shipment costs $100USD
Because the vol. of bike rim is very large.
If you don't order bike rim, just order spokes with nipple, it’s very hard to done your bike kit. Why not order bike conversion kit directly ?
Another way, you order 20 inch bike motor wheel with rim and hub. But without rotor winding. When you receive this hub wheel, you should disconnect your hub motor, take the rotor winding out of your hub, and put into this 20 inch wheel. This is the best choice. Cost less, easier to solve your issue.
Q: I tried to take out a spoke and I was successful. I then tried to put the spoke back into the bike rim and I succeeded again. So I would like to order a set of spokes without the rim. How much would it cost?
A: The price of 1 set of spokes is $10USD;
The price of shipment by EMS is $50USD (USA or Europe)
Total price:$60USD
Q: Yes, I'd like to go ahead and purchase it.
To double check :
- Are nipples included?
- Spoke (nipples) are for 20" rim (750W motor)?
- How can I pay for it – PayPal ? What's PayPal ID (email)?
A: I am not sure you can install them. We will send you a set of spokes (more than 36 pieces with
nipples) You could pay on our website directly. www.leafmotor.com
Q: I just sent you $60USD directly via PayPal (Transaction ID#28L39717XW247817D,date 25-May-2012)I couldn't do it from your website, so you will only see PayPal payment (may not see any order)
A: Could you tell me your correct address and telephone that for shipment.
We are going to ship out your products in 24 hours.
You will receive below goods:
1.36 pcs spokes with nipples for 20" 750w hub motor bike conversion kit
Bike conversion kit, hub motor, bike motor supplier: Leaf Motor Technology Co., Ltd
2012年4月27日星期五
How to build spokes on hub motor for electric bike ?
DIY electric bike conversion kit and convert your bike is funny. Sometimes we prefer to purchase spoke hub motor , bike rim and spokes. And build spokes on electric bike motor by ourselves.
If we want to convert 26inch front wheel, we should purchase 1 set of front spokes hub motor, 26inch rim and 36pcs of spokes. We can purchase them from leaf bike motor shop online.
Received goods and check them:
1. How many spokes you received. Generally we need 36 pcs spokes to built on hub motor and 12 gauge spokes for electric bike. 13, 14 gauge spokes are too thin, just for common bike.
2. There are 36 eyelet on bike rim and hub motor.
3. Check nipple and the dia. of eyelet on rim, make sure the nipple can put into eyelet.
Calculate the length of spoke :
If you use 205 leaf front hub motor, the eyelet to eyelet of rim is 511mm that is 26inch rim, spokes should be 155mm length.
You need below tools to install spokes on hub motor.
1.iron shelf
2.slotted screwdriver
3.nipple wrench
4.magnet
5.rubber hammer
6.tape measure
7.calipers
Done check, everything is okay. But we found the dia. of nipple is 4.5mm and the rim is also 4.5mm. These eyelets are too small. See pictures.
Get an electric drill and 4.8mm aiguille. Drill 36 pcs of eyelets on bike rim first. Adjust the iron shelf so that the dia. is 100mm. Because standard front fork is 100mm. Then put the rim inside the iron shelf, hold on the hub motor. Make the first spoke wear into hub from left side, the next from right side. One by one from left side to right side. Done install all 36 pcs of spokes, please check them whether correct. See pictures.
If no problem, we should hold spokes on rim by nipples First hold one spoke on left side, then cross to fix another spoke on left side. Next step, cross two spokes on rights side and fix them. Left side, right side, a group of four spokes. See pictures.
Fix all spokes, we should use wrench to tight spokes a little, please don’t be too tight. Use hand to turn wheel, make sure there is no noise from friction of rim and nipple. Use rubber hammer to knock rim when the wheel is running so that the rim will be not jumping up and down. Still to tight spokes a little. See pictures.
Turn wheel, you will find the rim from left side to right side. In order to make the wheel running in the middle. We use calipers to measure and get the data. Then use a magnet to hold a pin. See pictures. If rim to the left, we tight right side spokes or loose left side spokes. See pictures.
It takes about 1 hour to build an wheel.
If we want to convert 26inch front wheel, we should purchase 1 set of front spokes hub motor, 26inch rim and 36pcs of spokes. We can purchase them from leaf bike motor shop online.
Received goods and check them:
1. How many spokes you received. Generally we need 36 pcs spokes to built on hub motor and 12 gauge spokes for electric bike. 13, 14 gauge spokes are too thin, just for common bike.
2. There are 36 eyelet on bike rim and hub motor.
3. Check nipple and the dia. of eyelet on rim, make sure the nipple can put into eyelet.
Calculate the length of spoke :
If you use 205 leaf front hub motor, the eyelet to eyelet of rim is 511mm that is 26inch rim, spokes should be 155mm length.
You need below tools to install spokes on hub motor.
1.iron shelf
2.slotted screwdriver
3.nipple wrench
4.magnet
5.rubber hammer
6.tape measure
7.calipers
Done check, everything is okay. But we found the dia. of nipple is 4.5mm and the rim is also 4.5mm. These eyelets are too small. See pictures.
Get an electric drill and 4.8mm aiguille. Drill 36 pcs of eyelets on bike rim first. Adjust the iron shelf so that the dia. is 100mm. Because standard front fork is 100mm. Then put the rim inside the iron shelf, hold on the hub motor. Make the first spoke wear into hub from left side, the next from right side. One by one from left side to right side. Done install all 36 pcs of spokes, please check them whether correct. See pictures.
If no problem, we should hold spokes on rim by nipples First hold one spoke on left side, then cross to fix another spoke on left side. Next step, cross two spokes on rights side and fix them. Left side, right side, a group of four spokes. See pictures.
Fix all spokes, we should use wrench to tight spokes a little, please don’t be too tight. Use hand to turn wheel, make sure there is no noise from friction of rim and nipple. Use rubber hammer to knock rim when the wheel is running so that the rim will be not jumping up and down. Still to tight spokes a little. See pictures.
Turn wheel, you will find the rim from left side to right side. In order to make the wheel running in the middle. We use calipers to measure and get the data. Then use a magnet to hold a pin. See pictures. If rim to the left, we tight right side spokes or loose left side spokes. See pictures.
It takes about 1 hour to build an wheel.
2012年4月8日星期日
Check your hub motor wheel - electric bike kit
Order 1 set of electric bike kit from manufacturer-leaf motor and convert your bike to e-bike is a fun. But sometimes when we receive packages and don't know how to hanle it. Follow us:
Before install electric bike kit, we should test it first.
Step 1: Deliver your package
Spent some days on Internet, at last found leaf motor 's electric bike kit is the best. Ordered it and paid by paypal. Waiting for... About 3 days later, post officer knocked my door (EMS) and sign in it.
Check packing box first ,if it's okay. Pls disconnect electric bike kit box.
Step 2: Check all goods in package
Take out 26" hub motor rear wheel, bldc motor controller, lcd, throttle, brake lever, three button switches, speed signal wire and some connectors from packing box. Check each goods and make sure everything doesn't have fault.
Step 3: hold on 26" hub motor wheel
Put the hub motor wheel on your frame fork and tight both screw nuts.
Step 4: install magnet detector
Step 5: connect wires
1.Plug male 6-pin hall wires from hub motor cable to female connector from bldc motor controller;
2.Connect heavy yellow, green, blue from hub motor cable to heavy yellow, green, blue from bldc motor controller, color to color;
3.Two grey wires: connect these two wires/half speed; disconnect them/full speed;
4.Throttle connector is 3-pin that is easy to identify. Red: +4.5V, black: GND, green: Signal
5.Brake lever connector is white 2-pin.When hub motor is working, press brake lever is to cut off power;
6.Signal wire is black three pin plug that should be connected to white three pin female connector.
7.The other three pin connector from bldc motor controller is used for PAS;
8.Connect four pin lcd plug.
Make sure each wire is connected correctly. Power on battery.(Heavy red wire: +, black wire: - )Be careful,36V controller must work at 36V battery, if supply 48V DC, it will break the bldc motor controller at once.
Power on battery and press ON/OFF button on LCD one time, the LCD will light. Twist your throttle,hub motor starts to run. No strange noise...Press brake lever, electric bike kit system stops, loose it,the hub motor runs.
Pls watch video .
https://www.youtube.com/watch?v=SrwYae6zOMA
By test electric bike kit system, we found hub motor wheel, bldc motor controller, throttle.. everything is good. Next step is that we start to convert them on bike.
Hub motor, electric bike kit supplier: Leaf Motor Technology Co., Ltd
Website:https://www.leafmotor.com
Before install electric bike kit, we should test it first.
Step 1: Deliver your package
Spent some days on Internet, at last found leaf motor 's electric bike kit is the best. Ordered it and paid by paypal. Waiting for... About 3 days later, post officer knocked my door (EMS) and sign in it.
Check packing box first ,if it's okay. Pls disconnect electric bike kit box.
Step 2: Check all goods in package
Take out 26" hub motor rear wheel, bldc motor controller, lcd, throttle, brake lever, three button switches, speed signal wire and some connectors from packing box. Check each goods and make sure everything doesn't have fault.
Step 3: hold on 26" hub motor wheel
Put the hub motor wheel on your frame fork and tight both screw nuts.
Step 4: install magnet detector
Step 5: connect wires
1.Plug male 6-pin hall wires from hub motor cable to female connector from bldc motor controller;
2.Connect heavy yellow, green, blue from hub motor cable to heavy yellow, green, blue from bldc motor controller, color to color;
3.Two grey wires: connect these two wires/half speed; disconnect them/full speed;
4.Throttle connector is 3-pin that is easy to identify. Red: +4.5V, black: GND, green: Signal
5.Brake lever connector is white 2-pin.When hub motor is working, press brake lever is to cut off power;
6.Signal wire is black three pin plug that should be connected to white three pin female connector.
7.The other three pin connector from bldc motor controller is used for PAS;
8.Connect four pin lcd plug.
Make sure each wire is connected correctly. Power on battery.(Heavy red wire: +, black wire: - )Be careful,36V controller must work at 36V battery, if supply 48V DC, it will break the bldc motor controller at once.
Power on battery and press ON/OFF button on LCD one time, the LCD will light. Twist your throttle,hub motor starts to run. No strange noise...Press brake lever, electric bike kit system stops, loose it,the hub motor runs.
Pls watch video .
https://www.youtube.com/watch?v=SrwYae6zOMA
By test electric bike kit system, we found hub motor wheel, bldc motor controller, throttle.. everything is good. Next step is that we start to convert them on bike.
Hub motor, electric bike kit supplier: Leaf Motor Technology Co., Ltd
Website:https://www.leafmotor.com
2012年4月6日星期五
Hub motor kit ceased to function
On February 8th we ordered your 26” 48V 1000W front electric bike kit (1 set of 26” 48 1000W hub motor wheel with lcd bldc motor controller,twist throttle,brake levers,48V li battery) which was delivered to us on February 13th.Shipment is very fast.But the packing box is broken,we disconnect it and found the left brake lever was defective and I e-mailed you about getting a replacement set of levers. You told me that the parts would be sent. They never were received. I disconnected the lever plugs and have been using the bike for the past 1 month without them being hooked up.
Last week the bike ceased to function. I have 50+ volts going to the bldc motor controller connection but when I plug in the hub motor controller, the voltage drops to 1.8V and nothing happens. When I disconnect the hub motor connection, the voltage remains at 1.8V. As soon as I disconnect the battery, the electric bike battery shows full voltage of 50+ volts. The voltage indicator lights do not light up at all. So I have good voltage going to the controller but nothing works. I disassembled the controller to see if there was a broken connection or burned out part but can find nothing visibly wrong – when I connect a tester to the board the voltage shows 1.8 when should be 50 at the input connection. Something is wrong internally and I now need the hub motor controller to be replaced. I am relying on the electric bike kit to get to and from work so time is very important to me.
Please send me a new hub motor controller as soon aspossible. Also send me the previously promised brake lever set replacement at the same time (as long as it does not slow down the shipment of the hub motor controller). I would also appreciate it.
Hub motor,bldc motor,electric bike kit supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com
Last week the bike ceased to function. I have 50+ volts going to the bldc motor controller connection but when I plug in the hub motor controller, the voltage drops to 1.8V and nothing happens. When I disconnect the hub motor connection, the voltage remains at 1.8V. As soon as I disconnect the battery, the electric bike battery shows full voltage of 50+ volts. The voltage indicator lights do not light up at all. So I have good voltage going to the controller but nothing works. I disassembled the controller to see if there was a broken connection or burned out part but can find nothing visibly wrong – when I connect a tester to the board the voltage shows 1.8 when should be 50 at the input connection. Something is wrong internally and I now need the hub motor controller to be replaced. I am relying on the electric bike kit to get to and from work so time is very important to me.
Please send me a new hub motor controller as soon aspossible. Also send me the previously promised brake lever set replacement at the same time (as long as it does not slow down the shipment of the hub motor controller). I would also appreciate it.
Hub motor,bldc motor,electric bike kit supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com
Problem with electric bike hub motor kit
Good day.I have bought from you 1 set of 48V 1000W rear electric bike kit that includes 48V 12Ah li battery,48v lcd brushless motor controller,twist throttle,brake levers with 26” 1000w hub motor rear wheel.Received all things.The order number lf283218U578679K. Shipment was fast and packing box was not broken.
But since I had installed hub motor wheel,motor controller,throttle..everything, I had following problems: Twist throttle was sometimes hard to begin electric bike motor uphill, with even slightest elevation.Electric bike kit either stops unintentionally, while I begin to accelerate hub motor, or doesn’t start at all. Usually it takes several amperes to start throttling.Electric bike motor never gets hot, only a little bit warm.
Electric bike kit (regenerative) brakes almost didn’t work at all. It is possible to stop with them only from the lowest speed of 5km/h approximately. If the speed is more than this, brakes just let the hub motor to freewheel. I don’t know if they are converting electrical energy.
When I tried to use USB cable to see, if it is because of lcd hub motor controller settings, I couldn’t connect to it. Software starts, when I choose “Connect” nothing happens with the program itself, only the electric bike motor starts to beep constantly. “Get settings” didn’t load any, changing parameters and saving them seems to have no effect on the electric bike motor behaviour. Only “Disconnect” button worked, but somehow it says that “Get settings” is complete, and any changes in parameters reset to their initial state. After approximately 360km, “Cruise control” button stopped to work. I opened hub motor and checked electrical connection to the motor controller itself, the button itself and wires are functioning properly. But I have absolutely no voltage reading on the button’s wires.
Read article from blog and forum,I doubt the problem comes from electric bike battery.It as said,there is a BMS inside li battery.Some cells would be dead because of overcharge or overdischarge.If dead,can’t charge li battery.Even if charge it,green led on charger will light at once.It looks like full charge,actually no any electrical energy inside battery.So when I ride my hub motor electric bike,the electric bike motor will stop in short time.
Please, help me to resolve those electric bike kit problems, especially, with “Cruise control” button.
Hub motor,electric bike motor,electric bike kit supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com
But since I had installed hub motor wheel,motor controller,throttle..everything, I had following problems: Twist throttle was sometimes hard to begin electric bike motor uphill, with even slightest elevation.Electric bike kit either stops unintentionally, while I begin to accelerate hub motor, or doesn’t start at all. Usually it takes several amperes to start throttling.Electric bike motor never gets hot, only a little bit warm.
Electric bike kit (regenerative) brakes almost didn’t work at all. It is possible to stop with them only from the lowest speed of 5km/h approximately. If the speed is more than this, brakes just let the hub motor to freewheel. I don’t know if they are converting electrical energy.
When I tried to use USB cable to see, if it is because of lcd hub motor controller settings, I couldn’t connect to it. Software starts, when I choose “Connect” nothing happens with the program itself, only the electric bike motor starts to beep constantly. “Get settings” didn’t load any, changing parameters and saving them seems to have no effect on the electric bike motor behaviour. Only “Disconnect” button worked, but somehow it says that “Get settings” is complete, and any changes in parameters reset to their initial state. After approximately 360km, “Cruise control” button stopped to work. I opened hub motor and checked electrical connection to the motor controller itself, the button itself and wires are functioning properly. But I have absolutely no voltage reading on the button’s wires.
Read article from blog and forum,I doubt the problem comes from electric bike battery.It as said,there is a BMS inside li battery.Some cells would be dead because of overcharge or overdischarge.If dead,can’t charge li battery.Even if charge it,green led on charger will light at once.It looks like full charge,actually no any electrical energy inside battery.So when I ride my hub motor electric bike,the electric bike motor will stop in short time.
Please, help me to resolve those electric bike kit problems, especially, with “Cruise control” button.
Hub motor,electric bike motor,electric bike kit supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com
2012年3月26日星期一
The basic principles of the permanent magnet BLDC motor
We talk about one type of permanent magnet bldc motor for electric bike. It’s a bldc electric bike motor , sometimes we also call it brushless dc hub motor .
The permanent magnet bldc motor and the bldc motor driver is a typical product for e-bike recently.
Generally the electric bike motor ’s stator windings is made of a three phase star connection, with the three-phase asynchronous AC bldc motor is very similar. The hub motor rotor has been magnetized permanent magnet, in order to detect the polarity of the hub motor, there are three halls sensors on the rotor.
The bldc motor driver is made by the power electronic devices and integrated circuits, its function is to receive electric bike motor ’s start, stop and brake signal so that control the hub motor to start, stop and brake; receive the position sensor signals and reversing signal, used to control the inverse power tube change the bridge off to produce a continuous torque; receive the speed command and speed feedback signal used to control and adjust the speed; provide protection and display
The main circuit is a typical voltage-type AC – DC – AC circuit, inverter and other pieces of alternating square wave frequency of 5-26KHZ modulation wave symmetry.
Permanent magnet NS alternating exchange, the position sensor phase difference of 120 ° U, V, W, square wave, combined with the six-state encoding signal forward / reverse signal generator: 101,100,110,010,011,001, through processing logic components to produce conduction of T1-T4, T1-T6 turns on, the T3-T6 conduction, T3-T2 turn-on, turn-T5-T2, T5,-T4 conduction, which means that the DC bus voltage is incremented A + B-, A + C-, B + C-, B + A-, C + A-, C + B-, so that the rotor turned a pair of NS pole, T1-T6 power tube fixed into six states followed by conduction. Each state, only two phase windings are energized in order to change a state, the axis of the magnetic field generated by the stator windings 60 ° electrical angle of rotation in space, the rotor follows the stator magnetic field rotation is equivalent to the space of 60 ° electrical angle position, the rotor in a new location so the position sensor U, V, W to produce a new set of coding according to the agreement, the new coding and changed the power tube combination of conduction, the magnetic field generated by the stator winding shaft forward 60 ° electrical angle, and so on, permanent magnet electric bike motor produces continuous torque, drag the load for a continuous rotation. Permanent magnet DC motor commutation is itself, rather than forced by the inverter commutation, also known as controlled synchronous hub motor.
Hub motor, bldc motor, electric bike motor supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com
The permanent magnet bldc motor and the bldc motor driver is a typical product for e-bike recently.
Generally the electric bike motor ’s stator windings is made of a three phase star connection, with the three-phase asynchronous AC bldc motor is very similar. The hub motor rotor has been magnetized permanent magnet, in order to detect the polarity of the hub motor, there are three halls sensors on the rotor.
The bldc motor driver is made by the power electronic devices and integrated circuits, its function is to receive electric bike motor ’s start, stop and brake signal so that control the hub motor to start, stop and brake; receive the position sensor signals and reversing signal, used to control the inverse power tube change the bridge off to produce a continuous torque; receive the speed command and speed feedback signal used to control and adjust the speed; provide protection and display
The main circuit is a typical voltage-type AC – DC – AC circuit, inverter and other pieces of alternating square wave frequency of 5-26KHZ modulation wave symmetry.
Permanent magnet NS alternating exchange, the position sensor phase difference of 120 ° U, V, W, square wave, combined with the six-state encoding signal forward / reverse signal generator: 101,100,110,010,011,001, through processing logic components to produce conduction of T1-T4, T1-T6 turns on, the T3-T6 conduction, T3-T2 turn-on, turn-T5-T2, T5,-T4 conduction, which means that the DC bus voltage is incremented A + B-, A + C-, B + C-, B + A-, C + A-, C + B-, so that the rotor turned a pair of NS pole, T1-T6 power tube fixed into six states followed by conduction. Each state, only two phase windings are energized in order to change a state, the axis of the magnetic field generated by the stator windings 60 ° electrical angle of rotation in space, the rotor follows the stator magnetic field rotation is equivalent to the space of 60 ° electrical angle position, the rotor in a new location so the position sensor U, V, W to produce a new set of coding according to the agreement, the new coding and changed the power tube combination of conduction, the magnetic field generated by the stator winding shaft forward 60 ° electrical angle, and so on, permanent magnet electric bike motor produces continuous torque, drag the load for a continuous rotation. Permanent magnet DC motor commutation is itself, rather than forced by the inverter commutation, also known as controlled synchronous hub motor.
Hub motor, bldc motor, electric bike motor supplier: Leaf Motor Technology Co.,Ltd
Website:https://www.leafmotor.com
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