Author Archives: leafmotor - Page 30

Leaf New 48V LCD brushless motor controller

Posted by on March 11, 2025 Comments Off on Leaf New 48V LCD brushless motor controller

48V 1000W Electric Bicycle Brushless Motor Controller For E-bike & Scooter — 12-MOSFET

Features:
Suitable for Electric for electric bike & scooter
Rated Voltage: DC 48 Volts
Min. Voltage: DC 40 ± 0.5 V
Rated power: 1000 Watts
Casing material: aluminium
Maximum Current: 26 A ± 1 Amps
Thermal: aluminum shell and the substrate

3 phase 120° brushless motor
Operating Conditions: -20~45 °C
Waterproof design
Size: 171 mm L × 82 mm W × 42 mm H
Weight: 0.66 kg

Working with LCD
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
Under voltage protection

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

Error 4 stop hub motor working

Posted by on March 10, 2025 Comments Off on Error 4 stop hub motor working

Q: I bought a hub motor few months ago. Display error 4 is your brushless controller LCD? And I have a problem in the moment, because I install it and when I start to move the quad appears all the display the error 04 and a symbol of a tool, I had seen at the forum what’s the error meaning, but I think it’s something different because it had full charged electric bike battery pack.

A: How long did you use this electric bike battery pack ?

Q: It’s new. I have used ones for test the hub motor. It start full at the display but 100 meter later appear the error, hold on, then when appears the error, 10 minutes later in the display appear again full the electric bike battery that I use is a 4 lead batteries of 12V 45 Ah

A: Is your electric bike battery is 48V? That’s correct. The issue is battery. Do you have volt meter?

Q: Yes. I can find one.

A: Ride this bike and use volt meter to test the voltage of electric bike battery. If the voltage will drop down. The problem comes from electric bike battery. If the voltage drop down to 42V, the error will appears. If you don’t ride, the will display appear full.

Q: I’m trying to start the hub motor without any load. It works for 6 hour more or less.

A: How many current does your electric bike battery can offer? 10A , 20A or larger. You should use volt meter to measure the voltage when you load this hub motor.

Q: I bought 4 batteries of 12 V 45 Ah

A: Sometimes new electric bike battery is in stock for a long time. Even if No use. Also can need this issue. If you don’t load our hub motor, is there no error display?

Q: No, if it start to work freely, it work for 6 hours. How I use the volt meter to measure the electric bike battery? Working the hub motor ?

A: Connect red, black wires of volt meter to the positive and negative when the engine works,
watch the voltage on volt meter.

Q: Let me prove it, so I have to connect the positive of the battery to the positive of the engine and as well to the positive of the volt meter, and the same thing whit the negative ones, then star to work the quad watching the volt meter and if the voltage goes down the issue is in the battery.

A: Connect wires as before. Just add two wires from voltage meter. Red wire of voltage meter is connected to the positive of battery. The black wire is connected to the negative of battery. Make sure it on the VDC voltage position (=200VDC or ..)

Q: How volts it has to show to work properly? More than 48V ?

A: 42-60V

Q: Ok, so if the battery is full it has to show around 60V?

A: No, that depends on what type of battery. If LiMn2o4 is about 54V, LiFepo4 is about 58V. Lead acid is about 54V. When you test, the voltage will drop down. This electric bike battery is not good.

Q: I let you know if something different happen.

issue about electric bike kit battery

Posted by on March 10, 2025 Comments Off on issue about electric bike kit battery

We purchased an electric bike kit including motor controller, hub motor wheel, throttle, brake lever and with 36V 10AH bottle style Lithium Ion electric bike battery that used for testing 36V solar charger from one supplier, not from leaf motor. After charging this electric bike battery for 10 hours by better solar power, full charged, we rode the bike, but hub motor wheel only run about 8km.

We use a ampere meter in series to electric bike kit system, powered on and rode it. We got the current is about 5A. The speed is 257RPM.We use 26” hub motor wheel.

We calculate the speed is about 32Km/per hour.
See below formula:
（3.14×26”×0.0254）× 257RPM × 60 minutes ÷ 1000 (m-Km)=32km

If this is 10Ah battery, per hour lost 8ah.We can use 1.25 hours.
See below formula:
10Ah ÷ 8ah/per hour= 1.25hours

We think full charge this electric bike battery per time, the hub motor wheel can run about max 40 km. 32km/per hour × 1.25 hours = 40 km

There is definitely a problem with this electric bike battery, I’m not sure whether electric bike kit is because of the solar charging or our testing, or if it has a fault. But I need a replacement electric bike battery asap, because we don’t have any more 36v electric bike battery, and we sold 1 set of electric bike kit with lithium battery last week. I think BMS inside this electric bike battery no problem. The problem comes from the li battery cells. Maybe this electric bike battery had stayed in warehouse for a long time and haven’t charged it. It will make the electric bike battery cut down the achieve distances and use life.

So if solve this problem and let my hub motor to work asap, only replace all cells or replace new electric bike battery.

How connect electric hub motor controller wires

Posted by on March 10, 2025 Comments Off on How connect electric hub motor controller wires

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.

The Displayer Operating Manual for LCD motor controller

Posted by on March 10, 2025 Comments Off on The Displayer Operating Manual for LCD motor controller

When you received leaf motor’s bike motor kit with the LCD motor controller .Don’t know how to handle it.
For example: 36V LCD motor controller
1. Power switch
Supply battery, press power switch once, the LCD panel will display total mileage, speed , battery capacity and the time (time will be recounted once the power is on).
Voltage ≥ 36V four cells
36V > Voltage ≥ 34.5V two cells
33V > Voltage ≥ 31.5V one cell (flash every 0.5 second)
Voltage < 31.5V no cells (flash every 0.5 second) 2. → Next button Users may adjust freely between different levels of assistant functions by this button. 3. Set button 3.1 Press set button once, “KM” light is on. At this status, the single mileage will be shown in this area. You may reset it by → button.; 3.2 Press “SET” one time under the status of single mileage, total mileage will be shown. Press it again , it will display single mileage; 3.3 Press “SET” for 5 seconds, the light is on. At this status, you may set with → the size of wheel diameter from 10inch to 30inch in speed display area. 3.4 Fault code Eight status of fault instruction from 01~05, 07~09 will be displayed in speed area when the light is flashing. 01: Abnormal connection between LCD screen and controller; 02: Excessive current is detected in controller. If the status remains the same after restarting, it is certain that something is wrong with the controller internal power devices. 03: Motor three-phase power lines are fallen off, or motor is stocked for more than 2 seconds. If the status remains the same after restarting, it is caused by undesirable contact of three-phase lines. 04: Battery is at the status of voltage protection; 05: Hall cables are not connected, or incorrectly connected. 07: It is wrong with the brake lever cable when system is running. 08: The controller internal current will detect if the circuit element is damaged. The status will be displayed if it is abnormal. 09: The battery voltage is measured all the time under the working state. If it is > 47V，the system will enter into high-voltage protection mode, stop working.

Bike motor, motor controller supplier: Leaf Motor Technology Co., Ltd

How to build spokes on hub motor for electric bike ?

Posted by on March 10, 2025 Comments Off on 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 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.

Electric hub motor bike conversion kit for electric bike

Posted by on March 10, 2025 Comments Off on Electric hub motor bike conversion kit for electric bike

Ride a bike everyday is good for health. It can help you lose weight and achieve healthier body. By the way,sometimes riding for a long trip or steep road that is too tired.Buy a new e-bike is too expensive.Why not place an order for bike conversion kit and convert your common bike to electric bike by yourself.

Standard bike conversion kit includes:
1.hub motor wheel (8″ 10″ 12″ 14″ 16″ 18″ 20″ 24″ 26″ 27.5″ 700c 28″ 29″ 27″)
2.motor controller(drive hub motor)
3.twist throttle or thumb throttle(default twist throttle)
4.brake lever with low voltage to brake
5.three-button switches(control horn,led lights,cruise..)
6.pas(for Europe)
7.battery with charger(optional)

1 set of bike conversion kit has three key products:hub motor,motor controller and electric bike battery.
Hub Motor:There are 8″ 10″ 12″ 14″ 16″ 18″ 20″ 24″ 26″ 27.5″ 700c 28″ 29″ 27″ hub motor,what inch would you choose depend on your common bike wheel size.Motor type:brushed hub motor or brushless hub motor also called BLDC hub motor.Now because the bldc hub motor has advantage of low noise,high efficiency that replace of brushed hub motor.
Leaf Motor has 36V 750W / 48V 1000W brushless gearless electric bike motors are popular with North America.The other 24V 250W / 36V 250W bldc geared hub motors,European prefer them.

Motor Controller:Bldc motor controller which is called a heart of bike conversion kit system.Generally 6-MOSFET controller drives 250W hub motor,9-MOSFET drives 500W,12-MOSFET drives 1000W bldc motor.
Leafmotor is selling a LCD motor controller that display speed,mileage,battery gauge.

Battery:In China,electric bikes still use lead-acid batteries,they’re much cheaper,but a little heavy.North America or Europe always use lithium batteries that are more environmental.
Leafmotor has three types of lithium batteries:high speed,frog and bottle electric bike batteries for customers to choose.We found most of issues from lithium batteries that were not used correctly.
Three are two advice about how to use lithium battery.
1.Please remove power connector. If you don’t ride your e-bike for a couple of days.
2.Charge your battery often,but please don’t overcharge it.

Received your bike conversion kit,please check packing box first,then disconnect it and check each product that make sure all goods are okay.Then prepare below tools to install bike kit.
1.open-end wrench(loose/tight screw nuts)
2.philips screwdriver(fix LCD)
3.some zip ties(fix wires)

Remove the front or rear wheel.Find out the motor’s direction of rotation.Fix this motorized hub motor wheel to your frame fork and use open-end wrench to tight both screw nuts.According as install instruction manual and wiring diagram to connect wires make sure your wheel in the air,power on your battery,test bike conversion kit system.Turn throttle,if motor works well without any noise.Then use zip ties to fix wires.If not,please re-check your wire connecting.

If everything is good,it will take about 10 minutes to done it.Just order 1 set of electric hub motor bike conversion kit,your common bike will become electric bike.Cost less,get more.Have you found some fun?

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

Some issues about front hub motor electric bike kit system

Posted by on March 9, 2025 Comments Off on Some issues about front hub motor electric bike kit system

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

hub motor electric conversion kit failure

Posted by on March 9, 2025 Comments Off on hub motor electric conversion kit failure

Firstly, thank you for sending the hub motor with rear light so promptly – it arrived within a couple of days of your email and is installed and works perfectly.

Unfortunately there are some problems:

1) There were no instructions that I could find for connection of the electric bike battery level wire – the green one – so I am unable to tell what the battery levels are.

2) The light switch (brown and yellow leads) did not work on either the thumb control or the twist control (I use the thumb throttle control on the bicycle). I wired the lights directly to the electric bike battery leads with a switch and this works fine.

THE BIG PROBLEM.

I received electric conversion kit and installed the hub motor,motor controller,electric bike battery and the other parts on my bicycle about 10 days ago. I ride about 30km to work and back again in the evening and electric conversion kit has been performing very well. The route is quite hilly in places and the hub motor struggles a bit up the hills so I always apply some pedal assist in this situation. A couple of times towards the end of last week and again this morning when I have been applying the brakes on a steep downhill, there have been about 4 sounds from the horn and the motor has cut out. The first couple of times I switched off the power then back on again and the motor started again. This evening it occurred again and no amount of switching the power on and off would restore the motor to action. Instead each time, the horn sounded about 4 times, then stopped.

I started to ride with everything turned off but I noticed that the electric bike motor wheel felt rough and resistant to rotating. The electric bike motor wheel does not turn freely at all now. It feels as though the motor has seized.

I was relying on the bicycle with electric bike motor to get me to work so it is quite a problem.

I am happy to ship the hub motor back to you but not by air as it is too expensive. I was reading on the leafmotor’s forum that the HBL hub motor is better for hills. I would have bought this but it is not yet available for 20 inch wheels. If my hub motor is in fact unrepairable, I would like to have its replacement exchanged with the hbl hub motor for the 20 inch wheel – I am happy to pay the difference between the cost of a replacement for my hub motor and the hbl hub motor when it is available.

From above case,we are sure the bldc motor controller was broken that because of over-current brought high temperature and broke the MOSFET.
So your hub motor electric conversion kit can’t work.

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

Hub motor was very sluggish

Posted by on March 8, 2025 Comments Off on Hub motor was very sluggish

Question:While trying to get the hub motor up and running here we have run in to some problems. After installing the hub motor wheel in the fork it was very sluggish to turn and took quite a bit of effort, not freewheeling at all. The first time we plugged the battery (fully charged 48V 12AH LiFePo4 at 52.9V) in to hub motor (without the throttle connected to the controller cable) the hub motor beeped three times. When we hooked up the controller cable black and yellow pin connectors to the corresponding ones on the throttle there was no response from the electric bike motor, but the battery level lights did light up. We tried both throttles sent with the same results.

As it was the weekend I went to the forum and looked there for assistance. I received some good feedback that the 3 beeps we heard were a signal that the throttle was not work which is what we found as soon as we hooked up the throttle. We have checked all the leads for correct amperage as per his instructions with positive results.

I am assuming that electric bike kit is bench tested before it leave there? The packaging was undamaged upon delivery and all seemed in good order upon receipt. If you could please advise us on what to do to get this resolved we would appreciate it as we want to get on with our trials here to be able to get out product to market by summer.

I have checked my throttle and hub motor controller wires against your PDF diagram and there seems to be some discrepancy? I wish my camera was working but I will describe my findings. Diagram Throttle Black 3 pin shows: Red? perhaps Orange?/White/Blue Our Throttle Black 3 pin has:
Orange/White/Black from core with black jump to yellow 2 pin Diagram Controller Black 3 pin has: Red? perhaps Orange?/black/Yellow Hub Motor Controller Black 3 pin has: Rust from Core with Red Jumper to PAS White three pin/White/Black from core with Black jumper to yellow 2 pin

I checked the 8 pin connector again and can’t see that it isn’t making good contact. No bent pins or obstructions.Electric Bike Motor still beeps three times upon connecting to full battery as described with and without full connections of cables.

Yes jumping the two holes as indicated does make the electric bike kit run. It seemed like at first that by moving the controller wire that the electric bike motor would stop and start as if there was a short right at the junction and we thought that might be the problem. We hooked up the cable but I still am not getting any response from either throttle when hooked up to the black two pin connector even if I move the cable at the junction and now using the jumper the short method that issues seems to have gone away?

We are trying hard to make this electric bike kit work here but I have to admit we are getting a bit frustrated. The throttle cable while hooked up shows 5.0 amps on the red wire and from .8 amps at rest and 3.8 amps on the white wire when at full throttle like it should? Without the black pin connector together there are 5.0 amps at the red wire and .1 amps at the white wire if that is any useful information.

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