Author Archives: leafmotor - Page 26

Check your hub motor wheel – electric bike kit

Posted by on June 11, 2020 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 June 8, 2020 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 June 6, 2020 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… 

The basic principles of the permanent magnet hub motor

Posted by on June 5, 2020 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 June 5, 2020 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 June 5, 2020 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 Daluge company. January 1998 visit, Vice Premier Li Nanjing Daluge company inspection, after the test ride on Daluge 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 May 31, 2020 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

looking for some hub motor

Posted by on May 31, 2020 Comments Off on looking for some hub motor

We are looking to source some hub motor for a US based e-scooter project.

This one is a prototype but we hope to be in limited production later this year or early next.Each scooter will use two hub motors.

The hub motor needs approximately the following peak spec’s:
Work Voltage:36-48V nominal
Motor Speed:500 rpm at nominal voltage
Power:700-1000W steady state
Full axle (i.e. mountable on both ends)
DC Brushed or Brushless Permanent Magnet
160mm max width

Several of your hub motors seem to be pretty close to this.

From your website:
HBl — turns ~300rpm at 36V. Extrapolating out from the speed constant,at 48V this winding would do about 400rpm. This might be okay but do you have a winding with a higher speed constant?

It looks like the HBL-16″ is the same hub motor with a rim already mounted. This would be of interest.

Please let me know if I can buy 2-4 of these, and how fast I could get them in the United States. Do you have a dealer that stocks them in the US or do you ship direct from China?

Answer:Our 48V 1000W hbl hub motor is fit for your order.Standard 26″ 48V 1000W hub motor wheel reaches 26.7m/h.If need faster speed hub motor. We can customise motor speed.

We suggest you choose 16″ 48V 1000W rear hub motor.It’s 135mm width and
fit for 135mm fork.There are two screw threats on each side cover that are used to install disk brake and 6-sprocket.We re-change the gauge of the coil wires and/or the turns number of the coils,the fastest speed can reach more than 700rpm.

About motor drawings,please visit or download from https://www.leafmotor.com
We can ship 2-4 sets of samples to you by EMS.It takes about 3-7 days to deliver.

Thanks for you are interested in our hub motor.

Hub Motor controller for electric bike motor kit

Posted by on May 31, 2020 Comments Off on Hub Motor controller for electric bike motor kit

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
* ….

Leaf hub motor bike kit is working

Posted by on May 31, 2020 Comments Off on 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.

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 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.