Tag Archives: bike motor

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

Posted by on March 13, 2025 No comments

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 on March 13, 2025 No comments

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

controller for my 16 inch bike motor

Posted by on March 13, 2025 No comments

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.

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

Posted by on March 12, 2025 No comments

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

The Displayer Operating Manual for LCD motor controller

Posted by on March 10, 2025 No comments

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

The hub motor works very well but with E7

Posted by on September 19, 2024 Comments Off on The hub motor works very well but with E7

Q: I connected hub motor to the controller and everything up correctly and the display powers on perfectly well but when I turn the throttle on nothing happens with bike motor. Is there a necessary configuration?

A: First connect hub motor.Controller will check Hall sensor.Display E7. If connect wires well. E7 will be off. If always display E7. Bike motor works in no Hall status. Just check White big plug with red,black,green,blue,yellow..(Hub MOTOR SENSOR PLUG)If one wire is not connected well.Always display E7. Check if pin inside white big plug was bent?

Q: I checked the pins in that sensor plug, they all seem to be perfectly fine. The hub motor has not worked since I got it even if the hall plug is unplugged. Is there a change in settings for sensor less?

A: There are two brown wires from controller. Remove black tape on two brown wires. Don’t turn throttle. Plug these connectors together. Controller can look for correct working way. .Plug them.If bike motor Not work，Disconnect them.Then re-plug until work correctly.Then disconnect them.Turn throttle

Q: Cool I will try, should I turn the bike off before I connect the wires or should I do this while it is on? Will connecting those wires spin the motor?

A: If plug these two connectors,also can’t solve it. Controller always remembers this E7 is correct working way. Do it as below: 1.Disconnect/remove your battery power plug 2.controller’ red and black wires touch together for 1 second.Let controller to be default Then re-connect your battery to controller.(If wires are connected well).Must solve it.

Q: When I connected the pedal assist it works perfectly, so it must be the throttle, could you verify for me that this is the correct wire orientation?

BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Posted by on September 6, 2024 Comments Off on BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Q: Please send me a quote for this 20 inch 48V 52V 1500 Watt rear hub motor laced to a 20 inch double wall rim with 1.75 inch tyre.
few questions:
-what is the overall diameter ( mm ) of the 20 inch rim with 1.75 inch tyre ?
-what is the dropout distance of the axle ( mm ) ?
-please send me a schematic wiring diagram of the cable wires.
-estimated delivery by standard sea freight to Sydney, Australia.
-estimated delivery time ( weeks ).

A: This 20 inch BMX rear bike motor is fit for about 110mm rear dropout. (The dia. of shaft is 14mm, 14mm screw nuts, flat is 10mm that fit for 10mm)
Please click below site.
https://www.leafbike.com/products/e-bike-hub-motor/bmx-20-inch-48v-52v-1500w-rear-hub-motor-electric-bike-wheel-1264.html
If your tire is 20 x 1.75. When you order, tire size,choose: 20 x 1.5″ / 1.75″ / 1.95″
Total size of 20 inch rim is 420mm (about 16.5″)
There is one cable from motor with 3 heavy green,blue,yellow wires and 5 thin red,black,green,blue,yellow wires.
It takes about 10 days to deliver in Sydney, Australia.

Q: yes I think the Power Circle 20 inch rim with 1.75 inch tyre will suit my e-scooter rear frame.
My rear frame dropout is 135 mm, can you replace the 110 mm axle dropout with a 135 mm axle dropout.

The hub motor looks like it has a lot of torque (N. m), do you have torque arms that can fit on each side of the axle flats.
This will allow me to fix the torque arms to my rear frame to stop the axle spinning backwards under hard acceleration.

Do you have a wiring schematic for all the wires coming out of the hub motor so I can check which wires needs to connect to my Controller.
Is there a wire for the thermistor for the hub motor temperature sensor.

A: please click below site.This motor is 135mm dropout.
https://www.leafbike.com/products/e-bike-hub-motor/20-inch-48v-52v-1500w-rear-bike-motor-wheel-1016.html
We don’t have torque arm now.
We have NTC-10K and KTY84-130 two kinds of temp.Can choose one of them install into motor.Will come out a white wire.

Q: What is the temperature of the two types of wire… Which one is suitable for the hub motor?

A: Maybe your display can choose set and choose any one of them. Default: KTY84-130 (Most customers use this temp)
But, also other customers asked us to install NTC-10K inside motor.

bike hub motor speed

Posted by on January 29, 2024 Comments Off on bike hub motor speed

Q:Just a quick question. What is the tooth count on the freewheel sprocket?
A:16T or 18T
Q:Do you know which one? I may want to change it to a different tooth count.
A:Please click below site. This kind of single cog. (If you told us before shipment. We can put this one in parcel for free.
Q:I still wasn’t sure what front chain wheel to rear cog combination would work best with this motor. I can get the cogs here easily.The hub motor arrives today. Well done as always! Hey, I need the Kv for the motor in RPM/V and the number of pole pairs for my controller.
A:about 19 rpm/ V, 46 pcs magnets (23 pair)
Q: I am finally setting up the new bike motor. I assume the 750w is a 48v based version so the rpm if we use the provided figure kV figure of 19 rpm/V is around 912 rpm. Am I correct?And what is the max phase current on the motor?
A:We didn’t test this hub motor on machine. We worry load it that will break this bike motor.
So don’t know max current.
max phase current is about = 1/3 of max current.
Q:Thank you for explaining max phase current but can you approximate what your other similar hub motors had for a max current and then I can approximate from there. I need it to complete setting up the controller.
For example, what is the 4T 750w 48v max current or what is the 1000w 48v 4T max current, etc. From there we can get pretty close to what it is.
I am doing lots of diagnostics and see that my bike motor is maxing out at around 731 rpm. Why am I not getting 912 rpm?I am getting a max rpm of 763. I am using a 52v battery.
A:For example: 1500w 4T no load speed is about 610rpm @48v works with square controller
1000w 4T no load speed is about 720rpm @48v works with square controller
I think your 4T hub motor max about 830rpm no load speed works with square controller
If works with sine wave controller, 10% slower than square controller, about 747rpm no load speed.

BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Posted by on January 28, 2024 Comments Off on BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Q:Please send me a quote for this 20 inch 48 V 52V 1500 Watt rear hub motor laced to a 20 inch double wall rim with 1.75 inch tyre.
few questions:
-what is the overall diamater ( mm ) of the 20 inch rim with 1.75 inch tyre ?
-what is the dropout distance of the axle ( mm ) ?
-please send me a schematic wiring diagram of the cable wires.
-estimated delivery by standard sea freight to Sydney, Australia.
-estimated delivery time ( weeks ).

A:This 20 inch BMX rear bike motor is fit for about 110mm rear dropout. (The dia. of shaft is 14mm, 14mm screw nuts, flat is 10mm that fit for 10mm)
Please click below site.
https://www.leafbike.com/products/e-bike-hub-motor/bmx-20-inch-48v-52v-1500w-rear-hub-motor-electric-bike-wheel-1264.html
If your tire is 20 x 1.75. When you order, tire size,choose: 20 x 1.5″ / 1.75″ / 1.95″
Total size of 20 inch rim is 420mm (about 16.5″)
There is one cable from bike motor with 3 heavy green,blue,yellow wires and 5 thin red,black,green,blue,yellow wires.
It takes about 10 days to deliver in Sydney, Australia.

Q:yes I think the Power Circle 20 inch rim with 1.75 inch tyre will suit my escooter rear frame.
My rear frame dropout is 135 mm, can you replace the 110 mm axle dropout with a 135 mm axle dropout.

The hub motor looks like it has a lot of torque (N. m), do you have torque arms that can fit on each side of the axle flats.
This will allow me to fix the torque arms to my rear frame to stop the axle spinning backwards under hard acceleration.

Do you have a wiring schematic for all the wires coming out of the hub motor so I can check which wires needs to connect to my Crystalyte Controller.
Is there a wire for the hub motor temperature sensor.

thanks for assisting with my inquiry.

A:Please click below site.This bike motor is 135mm dropout.
https://www.leafbike.com/products/e-bike-hub-motor/20-inch-48v-52v-1500w-rear-bike-motor-wheel-1016.html
We don’t have torque arm now.
We have NTC-10K and KTY84-130 two kinds of temp.Can choose one of them install into motor.Will come out a white wire.

Q:What is the temperature of the two types of wire… Which one is suitable for the hub motor?

A:Both of them are suitable for the hub motor.
That depends on your controller & LCD reads which temp, NTC-10K or KTY84-130

Q:I have a Crystalyte 48V Controller from China and my display is a Cycle Analyst V3 from Grin Technologies in Canada.

which temperature sensor and wire should be selected.
what is the maximum temperature degree Celsius the hub motor can operate to without damage or burn out.
Our weather is very hot in Summer season and a lot of my customers have burned out their hub motors because of high temperature when riding up hills.

My new hub motor kit is all hooked up

Posted by on January 27, 2024 Comments Off on My new hub motor kit is all hooked up

Q:My new hub motor kit is all hooked up as directed an error 7 keeps popping up. I checked the wires all tight an right and still error 7.
A:Don’t care error 07.After work for 2 seconds.It will be off.
Q:Does not go off
A:If always error 7.Please check white plug’s red,black,green,blue,yellow wires.
Q:Have checked all wires an are tight and correct still error 7. So has to be bad bike motor.So what happens now refund or send me a hub motor that works.
A:Impossible to have issue for hub motor.
Q:I will try what you say with white wire an yes possible motor not work because this one doesn’t work I will get back to you on this if works fine if not we have a refund coming to me for bike motor at least.
A:Disconnect this big white plug. Motor still can work, but with error 07.
So should check this white plug ‘s each wire, each pin.
After each pin is good, each wire is good. Plug this big white connector to controller, then error 07 will off.
Q:Got error 7 off an right direction in pas 2 but switch to pas 3 an now don’t work at all no error 7 or anything just don’t throttle in any pas.
A:It doesn’t matter with PAS.
Could you take a video for this issue? Thanks.
Q:Hub motor made a electric sound but didn’t move an I’m not a video tech.
Disc is on left it’s not installed an bike is upside down an motor run right direction then wired all back an tried throttle a motor worked shut off an turned back on no errors on screen but now no throttle.
A:P09 must be “0” (Be 0, motor stops, turn throttle, motor works)
If be 1, throttle not work. Must push wheel, after wheel turn, turn throttle, motor works.
P10 must be 2. （If be 0, throttle Not work.)
Press “up” and “down” togehter. Then set P 01 , P 02…
Please check P09, P10
P 09 = 0
P 10 = 2
Q:Thank you the 0 on p9 worked all is working now wow thanks a lot.