Category Archives: bike motor - Page 5

controller for my 16 inch bike motor

Posted by leafmotor on June 16, 2020 Comments Off

I need to know what voltage is used by the bike motor. When it was running on a trike that I no longer have, I think it was a 24v bike motor.

Can you confirm that it is a 24v bike motor or is there someway to determine what the voltage and wattage is?

If so, would you be able to sell me the appropriate controller for that hub motor?

MY SECOND MESSAGE slightly expanded:
I need to know what voltage is used by my 16 inch bike motor.
Is there someway to determine what the voltage and wattage is? Also, is that motor brushless and gearless?
Given that it is a Leafbike.com/Leafmotor.com hub motor, would you be able to sell me the appropriate controller for that bike motor?

On your
https://www.leafbike.com/products/diy-bike-conversion-kit/16-inch-48v-52v-1000w-electric-bike-kit-front-hub-motor-wheel-1162.html
page you show a controller for the 16 inch bike motor. What would be the cost of the controller – the controller only? I do not want or need the
other parts.

looking an electric bike controller for 48V 1000W hub motor

Posted by leafmotor on June 14, 2020 Comments Off

I am using a brushless and gearless DC hub motor that is 48V 1000W. I am looking for a suitable bike motor controller for my project.

I want to implement regen braking, cruise, reverse, setting a speed limit etc.
Will this 48V 500W controller works for this 1000W motor?

I am quite hesitant to choose the 48V 1000W brushless motor controller displayed in the web here as I am afraid that the high power may drain too much power from the battery.

I am using a 48V 10Ah battery. It should be sufficient to power the 1000W BLDC hub motor but to power both the motor and controller, it may overstrain the battery.

Can you confirm that your brushless motor controller can set max speed limit, regen brake, reverse and cruise control?
Basically, I just need to buy the three button switch and every of the button can be used to perform on/off operation such as horn, lights, cruise, regen brake etc right?
What is the default max speed limit in the brushless motor controller? Do you change and set the max speed from the LCD display, controller or both? After I set the max speed and I do not want the max speed to be change, is it possible?
The hub motor can still work with the brushless motor controller, even with or without the LCD screen right?

Do you have a similar brushless and gearless hub motor like the one that is:

1) 14″ inch – 16″ inch (including solid rubber tyre)
2) Power is at least 750 W to 1000W max
3) Can implement regen brake, cruise, reverse, set max speed limit

If you have, can I have some details for these hub motors? I need them work with LCD brushless motor controller.

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

Posted by leafmotor on June 14, 2020 Comments Off

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 27.5″ 650b 27″ 28″ and 29 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. If you need steel parts for your building process, then make sure you use the.

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.

Step 5:install rotor winding
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 bike motor controller to drive this hub motor. If no any strange noise. It’s okay. You also need to make sure you have a controller that fits with the model you are working with, or else the whole thing might just fall apart.

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

BLDC hub motor bike conversion kit works

Posted by leafmotor on June 6, 2020 Comments Off

We test this bike conversion kit before shipment. If three led lights on throttle can’t work, please connect green wire to the positive of electric bike battery.

About anti-theft, you should disconnect two power wires (one red thin wire and one red thick wire).

Another red thin wire should be connected to a lock or a switch in series.

I find the problem and it’s was the thumb throttle who is not working… I changed the thumb throttle and replace it with the twist throttle and it work fine,,, but I am not satisfied because I prefer the thumb throttle so if I return you the thumb throttle would you send me a replacement one.

I got also another problem in the installation manual online you describe a procedure for anti-theft and I am not able to use it… What is a Cut off power to supply (called soft-switch is turning the key)

So please tell me if I mist something because the bike conversion kit system is not working.

Text for installation guide need clarification
6. Anti-theft alarm setting:
Cut off power supply to hub motor (called soft-switch, but hub bike motor controller is still powered
on) and take out the electric bike battery key, within 10 seconds press and hold the cruise
control button until you hear a beep sound, then release the cruise control button.
The bike conversion kit system is now protected from theft and the hub motor is electronically locked.
Any movement or vibration of bike conversion kit system will trigger the siren for 30 seconds, and the bike motor wheel will resist any pedaling movement.

Was this thin power wire connected well? If did no problem, are you sure that five hall wires from hub motor weren’t be connected well.

Could you try it as below :
Use your hand to turn your hub motor wheel, then turn your twist throttle, maybe do like that, it can turn.

It’s not working. Tell you what I done

Check all the connection three times also check with the diagram all wires and they are OK

Only thing I got: the horn is working and the gauge show full (3 lights) when I turn on the electric bike battery, also when I push two times the cruise button I get a loud beep from the horn and that’s all.

After a road test nothing at all it’s like having nothing at all…

The basic principles of the permanent magnet hub motor

Posted by leafmotor on June 5, 2020 Comments Off

We talk about one type of permanent magnet hub motor for electric bike. It’s a hub electric bike motor, sometimes we also call it brushless dc hub motor .

The permanent magnet hub motor and the hub motor driver is a typical product for e-bike recently.

Generally the electric bike motor ’s rotor winding is made of a three phase star connection, with the three-phase asynchronous AC hub 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 hub 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, 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 winding are energized in order to change a state, the axis of the magnetic field generated by the rotor winding 60 ° electrical angle of rotation in space, the rotor follows the rotor 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 rotor 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 commutation, also known as controlled synchronous hub motor.

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

How-to-build-a-freewheel-hub-motor-for-electric-bike-conversion-kit

Posted by leafmotor on May 31, 2020 Comments Off

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 27.5(650) 27″ 28″ 29 inch hub motor electric bike conversion 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 freewheel 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″ 27.5″ 700c 27″ 28″ and 29 inch bike kit wheel.

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

Hub Motor controller for electric bike motor kit

Posted by leafmotor on May 31, 2020 Comments Off

Hi, my name is Joseph, I am from USA and I already got two electric bike motor kits from you in the recent past.

But now I have the need to buy a new hub motor controller that works with 60 volt , I have 8 lead gel battery. The one I had from you is 48v 13amp and worked fine during long time. But with 60v is now is burn… Motor ok, 1500 w, lcd3 also works fine. Can you get the same type of controller with 60v output? With regen function and reverse like the 48 v controller?

I know that I must be careful with motor in future using 60v, but i take the risk because buy a complete new kit is too much tax .

If it’s possible I will be happy to ride again scooter

Yes,we have 60v LCD hub motor controller.
Features:
Suitable for Electric for electric bike & scooter
Rated Voltage: DC 60 Volts
Min. Voltage: DC 40 ± 0.5 V
Rated power: 2500 Watts
Casing material: aluminium
Maximum Current: 55 A ± 1 Amps (Updated to be 55A)
Thermal: aluminum shell and the substrate

3 phase 120° brushless motor
Operating Conditions: -20~45 °C
Waterproof design
Size: 234 mm L × 82 mm W × 42 mm H
Weight: 1.1 kg

Working with LCD-003
Display: speed, mileage, battery gauge…

Functions:
Mute when start
Speed limit
Power cut brake
Blockage protection
Current limit protection
E-ABS brake
Short circuit protection
Avoid out of control
1:1 pedal assist function
Undervoltage protection

Additional features:
* Cruise
* Reverse
* Regen brake
* Pedal assist ( 1 – 5 )
* Mph / kmh
* ….

How connect electric hub motor controller wires

Posted by leafmotor on May 25, 2020 Comments Off

Q: Now that I understand the purpose of these wires, I need to know exactly how to connect bike conversion kit wires.
1. “you could use a switch(on/off)to short pink and black”
1.1 What kind of switch? Is it included this bike kit or I have to buy it?
1.2 If I have to buy a switch, what are the characteristics of it? How do I connect pink/black wires to the switch?
1.3 If so, do I need to buy additional wires to connect pink/black to the switch? If so – what are the characteristics of it, wire resistance/diameter?
1.4 These pink/black wires are connected to a plastic connector
Do I need to buy another connector to connect my new hub motor ?

2 “use yellow and brown wires coming from the throttle to control your bike kit cruise.”
2.1 Again-how would I do that? Do I need to connect yellow/brown wires somewhere on the hub motor controller, is so – how?
2.2 Please note that these wires don’t have any kind of connector attached – am I suppose to connect them ?

3 “put the green wire to “+” and the grey to “-“, your LED on your throttle will light”
3.1 Where are the “+” and “-” you are referring to? Is it on the battery itself, or controller, or elsewhere? (for example: battery itself doesn’t seem to have open +/- sockets – other than the one used by the supplied cable)
3.2 Can I connect green/grey permanently (so that LED always shows the battery status), if so – how would I connect? Where would I connect them to exactly – controller or battery?
3.3 Again please note that green/grey wires are not attached
to any connector, just “bare” wires, so I don’t understand how can I connect them?
If you have any additional photographs and/or drawings, please share them also. If I need to buy
additional parts – please let me know what they are.

A: Don’t mistake with the positive and cathode of your bike kit battery to hub motor controller.(red and black battery wires).It doesn’t matter about making a mistake with other wires.
Don’t worry. Short any thin wires, it doesn’t burn your controller.
1.Cruise: when your motor is running, connect the pink wire to black wire(use a wire to connect pink and black wire) or you could use your brake lever to test this function. When your brake, it will cruise, when your loose your brake level, it will cancel cruise function.
2.This switch just have on/off function, you could buy other switches in your market
3.You should use a wire to connect bike conversion kit, it doesn’t matter about wire resistance / diameter, is this wire, no current.
4.You could use spare connector: yellow connect pink wire, brown connect black wire (C&Z),when your motor is running, press this red switch, your motor will cruise as the same speed.
Put the green wire to battery “+”
Put the grey wire to battery “-”
The Led will light, try it as I said, it doesn’t burn anything.
In fact, it’s very easy to do it, for example, you could use your
handle brake (two wires) to make a female connector connect any connector (white & black, pink & black)from hub motor controller.
If possible, you could use a software “e-drawing” to open our 3D about this hub motor controller.

How to build spokes on hub motor for electric bike ?

Posted by leafmotor on May 24, 2020 Comments Off

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 a 4.8mm electric drill. Drill 36 pcs of eyelets. 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.

Some issues about front hub motor electric bike kit system

Posted by leafmotor on May 22, 2020 Comments Off

DIY 1 set of 26″ 36V 750W front hub motor electric bike kit from Internet shop,waited for a couple days,at last received it.
Checked packing box,it’s okay.Disconnected package,there were all goods inside box:

1.1 set of 26″ 36V 750W front hub motor wheel without tyre
2.1 set of 36V 750W bldc motor controller with LCD
3.1 set of twist throttle with battery gauge
4.1 set of brake lever with low voltage to brake
5.1 set of three-button switches(control horn,led lights,cruise..)
6.1 set of 36V 16Ah LiMn2O4 electric bike battery with 110~230AC charger
7.some zip ties(fix wires)
8.1 set of instruction manual and wiring diagram

Was told to prepare below tools to install electric bike kit:
1.open-end wrench(loose/tight screw nuts)
2.philips screwdriver(fix LCD)

By now,install electric bike kit seems very easy.But for a newer,first time to install electric bike motor (hub motor) wheel and need to connect various unknown wires that is still a little difficult.
Leafmotor will share some install experience with every DIY bike kit rider.Some issues you will meet:
1.You are going to install hub motor wheel,you should find out the motor’s direction of rotation first.Please read install instruction manual;
2.Install tyre according as flower pattern of tyre;
3.Fix 26” front hub motor wheel on front fork.If your front fork is 100mm,no problem.After installed,sometime you will find the wheel isn’t in the middle of fork,now you should use some washers to adjust.If still can’t solve it,the problem come from spoke rim should re-fit this rim;
4.Fix bldc motor controller,LCD,electric bike battery and install throttle,brake lever,three-button switches.This step is easy;
5.Make the electric bike motor wheel in the air, power on li battery and test bike kit system.If it works normal.Please use zip ties to fix wires.If not,re-check wire connecting according as wiring diagram.

This fifth step is the most important.When you power on battery,you may meet below issues:
1.The electric bike kit system can’t work.When you turn throttle,nothing is happened.Now you should check battery power connector and three-pin throttle connector;
2.The electric bike kit system works as the fastest speed suddenly.The problem is the black ground wire from throttle isn’t connected well;
3.The hub motor shake,please check motor phase wires;
4.All leds light,but electric bike kit still can’t work.Check motor wires;
5.The electric bike kit works,but just wok less than 3 seconds,all lights on throttle are off.Loose throttle,be on and the bike kit system still works less than 3 seconds.This is battery issue,use volt-meter to measure it.Full charged 36V limno4 battery is 42V and dis-charged it is 34V.The volt of your new battery can’t less than 34V.If it’s under 34V,please return it to your supplier.
6.LCD doesn’t display speed.Solve: the sensor should be closed to the detector.

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

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Brushless hub motor丨e-bike conversion kit丨BLDC motor