Author Archives: leafmotor - Page 13

Check your hub motor wheel – electric bike kit

Posted by on March 13, 2025 Comments Off on 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 handle 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.

Please watch video .

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

if your lithium battery with BMS or not

Posted by on March 13, 2025 Comments Off on if your lithium battery with BMS or not

Does your electric bike battery has BMS function, if with BMS function,had better to always make this red button to be “down”(Don’t be up)… (After testing, LCD-008HU is no problem for working with the battery without BMS function.)

This red button be “up”, when ride, press brake lever,it will reverse charging battery.

It is necessary to confirm whether the lithium battery has BMS function. If the electric bike battery has BMS function, if the battery is full, use the reverse charging function of the controller, and the battery protection will not absorb. Then the reverse current of 70V, 80V and 110V will be reverse charged to LCD and controller.

The controller has a large capacitance, which can absorb the counter current. But LCD does not have a large capacitance, it will act on the LCD switching power supply and burn the switching power supply.

Other LCD-003 use resistance step-down power supply, reverse charging, resistance can step-down, will not damage the switch.
But for the LCD with USB port, the USB module will be burnt if the counter charging exceeds 70V
Because there are a lot of things that need to be lit for this color screen instrument. It uses the switching power supply. If the reverse charging exceeds 70V, the switching power supply will be burnt out

If your lithium battery has BMS, can’t make that red button to be “up”(three button switch). (red button should as “down” as below picture)
Had better Not use this red button. Thanks.

BLDC hub motor bike conversion kit works

Posted by on March 13, 2025 Comments Off on BLDC hub motor bike conversion kit works

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… 

I would like to order a rear 48v 1500w hub motor wheel

Posted by on March 13, 2025 Comments Off on I would like to order a rear 48v 1500w hub motor wheel

I really like (love) your hub motors (they perform really well and last a long time) and now I have the time to get the one I always needed.
And here is a very similar bike which also has a 1000W option rear hub motor this one has multiple speeds, most probably 7.
I have asked the rear dropout widths. Will get back to you as soon as I know. And I have a steel frame with a 145mm dropout now which I can widen. I do not 100% understand the trade offs that you are referring to when you say that the rim doesn’t matter, it is the 3 inch tire that is the issue for this hub motor as the same electric bike motor would also go into a wider dropout fat bike which also has an even wider tire – 4 inches. I need more details to understand it more clearly.
And there are other options at the front end of the chain where we can move the chain out a bit:

1. the little chain guide can help – this is mounted to the seat tube to push out the chain from the frame and tire
2. move bottom bracket out to the right
3. or get a bottom bracket with a longer spindle
4. or add spacers between the crank and chaining

What hub motor do you use for your 2000w and higher power fat bike applications? What would I need to change to make any motor work?

I see that the 2000w electric bike motor is 74mm wide which is only 4 mm wider than the 1500w hub motor. I have attached some new pics of my bike from different angles so that you can see how much clearance I have and if I just go with a single speed setup, I will have enough clearance for the chain but in case I need to get additional clearance, I do have some options mentioned previously. So my question now is would a wider or higher power motor work better? I see that the 1500w motor works with dropouts of between 135 and 155mm. And then the 2000w one begins at 170mm. I can widen my dropout and since I won’t be needing the space of a 7 speed cassette, I should be able to have the chain clearance I need.

replace 16 inch hub motor wheel

Posted by on March 13, 2025 Comments Off on replace 16 inch hub motor wheel

I have a electric scooter similar to this.The dimensions of the e-scooter are very suitable for driving around in city traffic but the hub motor is too whimpy. It is about 350 watts and I…well, shall we say that I weigh a bit more than the average Chinese person, and I often carry large boxes of things that really dog the bike down. I want to replace the present 48v motor with a 48v 1000w motor. I will be in the US next week, so I can pick it up then and bring it back. The wheel size is 16″. I want to be able to put disc brakes on the rear, as well as a sprocket to mount the chain on the left side. I also hope that I can mount 3″ tires on it. Do you have such a thing? Can you conversion kits be mounted on a 16″ rim? I also need a controller for the motor and hope to find one that regen capability, cruise control and reverse.

We recommend our 16 inch 48v 1000w rear hub motor kit.

The 16 inch electric bike kit combines the full E-bike technology: direct drive Brushless Gearless high torque hub Motor to change almost every bicycle into a personal electric bike. Save energy, protect environment and save money with a lot of fun.
* Saving 10% of electricity, Improve the efficiency of 8% With The Newest Materials Steel Rotor.

Main Features:
Rim: 16″ Casted Alloy ( tyre : 16 × 2.125 “ , 16 × 2.5″ )
Hub motor: brushless gearless dc motor
Controller: LCD display
Max speed: 56.5 kmh — 35.0 mph ( faster speed motor )
Mechanical brake: Disk or V
Install: spacing of 135mm fork

Updated LCD , More Function:
* Cruise
* Forward & Rackward (Optional)
* Regen brake
* Kmh & mph (Optional)
* Set Max speed ( 0 ~ 72 kmh / 45 mph )
* Pedal assist ( 1 – 5 )
* Temperature
* Motor power
* Timer
* Battery gauge
* …

controller for my 16 inch bike motor

Posted by on March 13, 2025 Comments Off on controller for my 16 inch bike motor

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.

The basic principles of the permanent magnet hub motor

Posted by on March 12, 2025 Comments Off on The basic principles of the permanent magnet hub motor

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

bldc motor interaction principle

Posted by on March 12, 2025 Comments Off on bldc motor interaction principle

Based on the principle of rotation of the motor for the Fleming left hand rule, when a wire placed in a magnetic field, if the current through the wire, the wire will cut the wires generate the magnetic field lines move. Current into the coil creates a magnetic field using the current magnetic effect, the solenoid magnet at a fixed continuously rotating device that can convert electrical energy into mechanical energy. And a permanent magnet or by another group of the magnetic field generated by the coil to generate power bldc motor interaction principle is the stator does not move, the force generated by interaction of the rotor according to the direction of movement. bldc motor controller is on the alternating current through the stator windings, a rotating magnetic field, rotating magnetic field attracts the rotor rotates bldc motor with the basic structure include “armature”, “field magnet,” “slip ring”, “brush” . Armature: You can rotate around the axis of the soft iron core wound multi-turn coil. Field magnet: the strong magnetic field of permanent magnet or an electromagnet. Collector ring: coil about two to two semi-circular termination of slip ring, with the coil rotation for changing the current direction of the change to the device. Each half-circle rotation (180 degrees), the coil current to change direction once. Brushes: carbon usually made of slip ring brush contact with a fixed location to be connected to power.

qualified electric bike conversion kit model

Posted by on March 12, 2025 Comments Off on qualified electric bike conversion kit model

In 1997, China’s first a qualified electric bike conversion kit model was born in Nanjing company. January 1998 visit, Vice Premier Li Nanjing Daluge company inspection, after the test ride on electric bike conversion kit to give full recognition.

    From the first a qualified electric bike kit shipped to 2000 electric bicycle conversion kit industry begun to take shape, and then in 2008 the national electric bicycle conversion kit close to 100 million users, electric bicycle conversion kit industry through the years ups and downs, ups and downs. In this decade, electric bicycle conversion kit technology, while the rapid development can not be said, but it has been followed by consumer demand, unknowingly, the various effects of industry, technological innovation continue to be developed. Meanwhile, the rise of various non-electric bicycle conversion kit on the wave of invention, but also to some extent the industry into a creative vitality.

    It can be said that China’s light bike conversion kit is the rise and development of basic research from the beginning, which also determines the electric bicycle conversion kit, as it most closely with the industry, will obtain the support of the masses and the government vigorously promote . As a lightweight electric bicycle conversion kit technology latecomer countries, China electric bicycle conversion kit industry has shown amazing vitality. In just ten years time, China has reached global electric bicycle conversion kit cutting edge of technology, with very encouraging results.

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

Posted by on March 12, 2025 Comments Off on How-to-build-a-freewheel-hub-motor-for-electric-bike-conversion-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 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