Category Archives: bike motor controller

LCD bldc motor controller for e-bike

Posted by on March 8, 2025 No comments

There are two types of hub motor wheels are used for e-bikes. One type is hub bldc motor , the other is brushed hub motor. Because the brushed motor had some disadvantage of high noise, shorter-use life, low efficiency..

These days hub bldc motor wheels are used for electric bikes widely and had replaced brushed hub motor.

So more and more motor controller are showed in market. For example: cruise brushless controller , regen brushless controller, programmable brushless controller, lcd bldc motor controller…

Convert a bike to an e-bike, we should choose a hub bldc motor wheel with brushless controller and throttle, brake lever,on/off switches,disk brake,front&rear lights,horn..etc accessories

European like 250w hub bldc motor and North America prefer 750w / 1000w bldc motor. How to purchase a good brushless controller to drive this bldc motor .

Generally 250w bldc motor need to be driven by 6-MOSFET brushless controller, and a 9-MOSFET motor controller dirves a 750w bldc motor,a 12-MOSFET brushless controller dirves a 1000w bldc motor.

Now nearly all types of brushless controller for e-bikes have cruise, alert, reverse, limited speed..etc. function.

If you buy 1 set 48V DIY kit, you had better to choose 48V 12-MOSFET/15-MOSFET brushless controller. Please don’t order 9-MOSFET motor controller to drive your 1000W brushless controller, it’s the heart of e-bike. 1000W bldc motor will bring larger current and high temperature, 9-MOSFET can’t afford.

For the bulk .of motor controller, larger, better. Larger bulk has better cool system.

In past, there was a guy sold regen motor controller, but nearly all sold regen controllers were broken in 30 days. Because when you brake, this regen controller will bring twice current to stop your e-bike, thus larger current would break MOSFET directly.

Now programmable controller is still showed in market. This brushless controller seem has nice face, but its head is small, can’t stuff more MOSFET. Use this brushless controller to drive 750w / 1000w bike system and break this nice face controller is normal. Don’t be arrest by programmable. You will find nothing for actual use when you use.

We have LCD cruise controller, more MOSFET, don’t worry your motor controller will be broken.
LCD bldc motor brushless controller for e-bike.

Bldc motor, motor controller , brushless controller supplier: Leaf Motor Technology Co.,Ltd

36V 500W / 36V 750W brushless motor controller

Posted by on March 8, 2025 No comments

DC motor controller has two types:brushed & brushless controller.
The principle of brushed motor controller is much simple.But brushless motor controller should control brushless motor phase,limit starting current,control speed,PWM control etc.
MOSFET is an important part of controller.More MOSFET,controller is more expensive.
Generally 6-MOSFET brushless controller is used to control 36V 250W bldc hub motor.
36V 750W brushless motor should be controlled by 12-MOSFET controller.
Now we use 15-MOSFET to control 48V 1000W brushless motor.
Never worry break controller.

Model:LCC-001 36V 500W / 36V 750W brushless motor controller
Working with LCD
Special Features:
1.EABS System
2.1 + 1 Assistance
3.Idle Running Protection
4.Dynamic Motor Lock System
5.Motor Shaft Lock Protection
6.Power Tube Protection
7.Cruise Speed Control
8.Self-check Protection
9.Speed Limit
10.Remote Control Anti-theft

This 36V 500W electric bike conversion kit,Product list:
1.1 pcs of 20″36V 500W rear motor wheel (fast speed);
2.1 pcs of 36V 500W controller with LCD (display speed,battery gauge,mileage..);
3.1 pcs of 36V twist throttle with battery gauge;
4.1 pcs of brake lever;
5.1 pcs of three – button ON/OFF switch is used to control horn,front&rear lights,etc.
6.1 pcs of threaded-adapter is used to fix disk brake

48V 500W dual drive controller

Posted by on February 20, 2025 No comments

48V 500W Electric Bicycle Dual Drive Controller For E-bike & Scooter.
It’s fit to drive 48V 500W brushless with hall sensor hub motors.

Features:
Suitable for Electric for electric bike & scooter
>>. MOSFET: 6 PCS + 6 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Power: 500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 15 A + 15 Amps
>>. Thermal: aluminum shell and the substrate – Black color
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 164 mm L × 53 mm W × 33 mm H
>>. Weight: 0.65 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
. Undervoltage protection

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

motor controller cut off voltage

Posted by on February 8, 2023 Comments Off on motor controller cut off voltage

Each motor controller has min cut off voltage and max working voltage.

For example:
48v Controller’s cut off at 40v. Less than 40v, not work.
36v Controller’s cut off at 30v. Less than 30v, not work.

For 48v electric bike motor kit system.We recommend reach set cut off voltage to over 42v by LCD. Less than 42v,should charge battery. It’s good for battery.

These days,all kinds of lithium batteries was made by 13 series connection or 14 series connection cells to be 48v, 52v.

Each cell – min about 2.8v , max about 4.2v
13 series – 4.2v x 13 = 54.6v
14 series – 4.2v x 14 = 58.8v

Overdischarge and overcharge both Not good for battery.
For example: if set it to 40v (controller’s cut off voltage is 40v)

2.8 x 14 = 39.2v (about 40v)

If 14 series connection cells ‘s min voltage to be 2.8v at the same time. That’s good.

But ride half a year, cut off voltage still 40v.
If No. one cell ‘s min voltage is 2.7v, second is 2.9v, third cell is 2.9v….
Total voltage is 40.4v ( 2.9 x 13 + 2.7v)

If first cell’s voltage to be 2.7v, it’s overdischarge, battery can’t to be charged. Battery is broken.
So we recommend charge battery when it reach about 42v or over.

If min 42v
No. one cell ‘s min voltage is 2.9v, second is 3.0v, third cell is 3.0v….
Total voltage is 41.9 v ( 3.0 x 13 + 2.9v)

New battery doesn’t have this issue. If ride 1-2 month, we recommend charge battery @ 42v or over.

For example: cell phone, only leave 20%,need to charge. If use out all that will break cells, also very hard to charge.

So we recommend set cut off voltage by LCD that over controller’s cut off voltage.

Why choose leaf motor controller

Posted by on February 6, 2023 Comments Off on Why choose leaf motor controller

Three years ago, leaf motor started to design controllers,manufacture controllers,test controllers,modify and re-test. Day by day. three years past,compare with other controllers,leaf three mode controllers are the best.

In market,there are square wave, sine wave, two kinds of brushless controllers that drive brushless with hall sensor motor.Every one knows,hall sensor is electronic component.It works in the rotating rotor.It’s easy to be broken.

If one hall sensor is broken, the electric bike can’t work. Need to replace hall, but it’s very hard to replace hall.Not easy. Replace the whole of winding rotor, it’s too expensive.

In past,leaf sell KT controller,met hall sensor issue, should replace the whole of winding rotor to customer.

The price for one hall sensor is less than $1USD
But, the whole of winding rotor over $100USD includes shipping cost.
Replace winding rotor waste too much.

Sine 2019,leaf motor started to manufacture theirselves controllers.
Leaf Brand New electric motor controller with Sine wave, Square wave, No hall, three modes compatible.

What are three modes?
* First mode: Sine Wave Status – Motor without noise,Very quiet ! 
If one of motor hall sensor is broken, controller still can work in Sine Wave Status.

* Second mode: Square wave Status – Motor with a little noise, < 60db, speed is about 8% faster than Sine Wave Status. If two of motor hall sensors are broken, controller can work in Square Wave Status. * Third mode: No hall Status - Motor with a little noise, < 60db, speed is about 8% faster than Sine Wave Status. If all of three hall sensors are broken, controller can work in No hall Status. If your motor's hall sensors are broken, don't need to replace hall sensors. Just use this controller that can recover your motor to work. If you don't know how to match motor wires to controller.  Just plug two blues together, controller into learning status and looking for correct working way. After 1-2 seconds, it can find correct working way,then disconnect these two blue wires' plugs. From now on,it always works with this kind of correct way.   

48V 52V 1000W electric hub motor controller with LCD screen

Posted by on December 7, 2022 Comments Off on 48V 52V 1000W electric hub motor controller with LCD screen

48V 52V 1000W electric hub motor controller runs very well. It gives the performance we hoped for.

Nevertheless, we are struggling connecting the regen brake. I would very much appreciate if you could help us to figure out how those wires are to be connected in order to have the engine giving us regen brake when cruising downhill.

Let me summarize:
I assume the yellow, green and red colors represent the colors of the knobs on the switch for each function right?
We have managed to have cruise and reverse working, but we do now know how to connect the Regen brake to the switch to enjoy electronic brake from the motor.

There are 4 cables from the controller for those 3 functions:
Black
Green
Blue
Yellow

When we connect green cable to blue or black the cruise works.
When we connect yellow cable to blue or black the reverse works.

But how do we have the Regen Brake working?
Can you please what color of the cable is for the regen? (is it blue?) and what other color from those 4 should it be connected with to make it work please? Thank you.
I truly would appreciate your help, we do not need reverse on a bike, but the regen would be very welcome.
Thanks a lot, in advance for your help.

How to use three button switch?
1.We cut off that yellow wire.It’s for reverse/backward.This function is very dangerous for e-bike. If for e-tricycle,hope this reverse function,just re-connect this yellow wire.
(We cut off yellow wire.. so no reverse/backwards function for e-bike. If install motor on tricycle, also need this reverse function,please re-connect this yellow wire. Reverse works)
This yellow button be left / middle,motor works forward. Be right side,motor works backward / reverse… (Cut off blue wire,No reverse function)

2.Green button is used to control cruise, while motor is running,also over some speed,example: over 1/3 max speed,at this time,press green button one time,then loose throttle,LCD display “C”,motor will works the same speed. Re-press this green button one time or press brake lever or turn throttle to max,motor will stop.

3.Red button be up,regen on. Be down,regen off. This regen will charge battery while press brake lever (We cut off red wire..)No recommend use this function.

need bike motor controller replacement

Posted by on February 7, 2022 Comments Off on need bike motor controller replacement

I would like  to know if you sell  the bike motor controller only, because i damage mine by over voltage  and i need to replace it.
Motor and LCD are still good. So please, i just need motor controller at the moment.
 
The photo I’m sending from a copy of a invoice is just to give you full details of address info, the invoice is from other kit , not this.
 
Can you make better price selling without LCD display ?
 
I will buy more parts in future from you for sure. I have new projects in my mind.
 
I already sent i e-mail today asking for the same model but with 60v (if this option is possible), if not possible no problem ,i will need  to have another 48v  controller, and  change to a 48v battery again..
 
Im sorry, I said in last e-mail i had 8 x 12v lead battery, but my mistake,because  in fact they are 10 bat, 12 amps +or- ,and 12 volts each. ( 2 box with 5 batt. each )
 
A lot of weight to carry, but i made already about 350 miles so far without any major problem…not bad homemade electric scooter…spend some money but i love this installation process, its a fine hobby for me. I ride it most of the time inside private property to avoid problems. I don’t go fast, but uphill the controller burn…stupid mistake of mine..i push the controller limits.. many amps and some extra volts burn controller, almost in the end of the project..
 
I’m your costumer for some time and i prefer your controllers because they  are good and have regen break, very useful for me because i live in high place in Portugal, full of up and downhills.  I also prefer the original parts from you because i know they will fit perfect on the Lcd display that i already have
 
If yes , how can i pay you  excepting credit card ?
I can make bank transfer if you like, or another safe method for both.  If i buy only controller i will pay less tax here also, less money in invoice is better for me because last time i payd a lot, also because motors are heavy , but only controller will be good, its lightweight for the post tax. If possible,  don’t mention watt power in invoice please, The hub motor has 1000/1500 watt power.. i cant remember exactly, because sometimes display already  showed 1200, 1300 watt instant motor power  . maybe 1500w motor…not sure..

14″ e-bike stopped and waited for a moment

Posted by on January 15, 2022 Comments Off on 14″ e-bike stopped and waited for a moment

Q:Ride ebike on the flat road,no problem,but when I climb the hill,it will stop and wait for a moment,it still can re-start and have the same problem at once.

A:The temp inside the controller is too high and in order to protect this controller,should wait for a moment until the temp is lower than protective temp.

Solve:Use more MOS-FET brushless controller.

Now our 48V brushless motor controller has 15-MOSFET.More MOSFET afford temp and the temp rise very slow.It can solve this problem.

In market,always use 9-MOSFET to drive 48V 1000W hub motor.This kind of brushless controller is easy to be broken because of high temp will break MOSFET.

36V 750W / 48V 1000W 14″ brushless gearless hub motor is make up of aluminium hub,aluminium cover,magnet,rotor,winding,axis etc.Mounted 14×2 1/4~2 1/2″tyre,load approximate 300lb.Motor speed,we can customize according as your actually need.
It’s used for e-bike,e-scooter.

electric bike kit for e-bike

Posted by on January 15, 2022 Comments Off on electric bike kit for e-bike

Q:I want to buy for my Merida cross 5100:
-Front bike hub motor 48 V/ 1000W
-48V Thumb Throttle
-Battery LEV-High Speed 4812
– wires to throttle and battery.

But I have the questions:
1.I need spokes for 28″ wheel. Are they attached to motor, and how much are they if not?
2. The battery could be fixed only on trunk or on frame too?
3. I`m living in St. Petersburg, Russia. What type of delivery is most economic and how much it will be?

Answer 1:The most economic is that ship by international parcel.It’s much cheaper than EMS.We often use this way to ship packages to Russia.But It takes long time to ship and hard to track the status of package.
About your order,I want to give your some suggestion:
1.This 48V/1000W motor is good.Most of our customers have used this motor more than 3-5 years and never meet problem.
2.Thumb throttle,No problem
3.Li-Battery costs expensive,but its life is short.Though many battery companies called their batteries have high quality,it’s not true.Most of Li-batteries will meet problem in 1 year.For example:your notebook PC’s li battery.
Do you have brushless controller to drive this 28″ hub motor?

Answer 2:spokes may in attachment hub motor
please email to leafmotor:sales@leafmotor.com
You also order electric bike conversion kit on leafmotor’s internet shop.
And DIY your favorable bike kit.

16 inch 36V 250W front electric hub motor kit

Posted by on January 15, 2022 Comments Off on 16 inch 36V 250W front electric hub motor kit

With the price of gasoline rise and pollution,a bicycle is good for an environmentalist.

Riding a bicycle is a great non-polluting way to get exercise and get around, but a steep hill or a long commute can turn into an unpleasantly sweaty affair. Converting a bicycle into an electric bicycle can create a vehicle with all the advantages of a regular bike, but with a little power assist to get past the disadvantages. You can assemble a set of components on your own or buy a matched electric bike conversion kit!

Compare to buy a new electric bicycle,order an electric bike kit to convert your existing common bicycle to be electric,less cost.

Leafmotor has one new type of e bike kit for old men and children.
It’s a 16″ front 36V 250w electric bike kit that includes:
1.16″ 36V 250W front casted brushless gearless hub motor is fit for 100mm front fork.
2.36V 250W 6-MOSFET brushless motor controller working with LCD,display speed,mileage,battery gauge..
3.Twist throttle or thumb throttle(default is twist throttle)
4.Brake lever
5.Three button ON/OFF switch is used to control front&rear lights,horn,cruise…

This hub motor is make up of aluminium hub,cover,magnet,rotor, winding,axis etc.The net weight is about 5.13kg,use 16×2 1/4″tyre. Motor speed,we can customize according as your actually need.