Monthly Archives: April 2025 - Page 4

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

Posted by on April 6, 2025 No comments

This 20 inch BMX bike motor 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.

This 20 inch BMX bike kit works with a 48V or 52V battery.

Main Features:
>. Rim A: 20 inch double wall Alloy (Rim Fit For: 20 × 1.5″ / 1.75″ tire)
>. Spoke: Silver 12 gauge / 68mm Length × 36 pcs

>. Rim B: 20 inch double wall Alloy (Rim Fit For: 20 × 1.95″ / 2.0″ ~ 2.5″ tire)
>. Spoke: Black 12 gauge / 72mm Length × 36 pcs

>. Engine: Bldc hub motor
>>. Voltage: 48V / 52V
>>. Power: 1500W
>>. Efficiency: 87.7%
>>. Max speed: 58.0 kmh — 36.0mph @48V (No load speed)
>>. Max riding speed: 32mph @48V Default (Optional other speed: 26mph or 20mph,15mph,Other speed: please leave message) — If work with 52v battery, a little faster.
>>. Mechanical brake: V
>>. Sprocket: single speed freewheel
>>. Cable location: shaft end, Right
>>. Cable length:150cm / 60″
>>. Install: spacing of 110mm rear fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
Default: Heat Shrink Bullet Crimp Female Male Wire Connectors Electrical Terminals for battery plug.(Leave message Optional: XT-60)
>>. MOSFET: 18 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 / 52 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 1500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 40 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 155 mm L × 72 mm W × 38 mm H

With LCD, More function:
* Cruise — Green button Control (While motor is working,press green button one time,it will be “CRUISE” – running as the same speed)
* Reverse — Yellow button Control (“Left side & mid / forward — “Right side / backward”)
* Kmh / mph
* Throttle speeds ( 0 – 5 ) — “0” is off throttle. “1” is the slowest. “5” is the fastest.
* Pedal assist speed ( 0 – 5 ) — “0” is off pedal assist. “1 ~ 5” is the fastest. ONLY one max speed. If hope pedal with 5 kinds of max speeds, please choose the other controller of ours. Please click below link:
https://www.leafbike.com/products/diy-bike-conversion-kit/bmx-20-inch-48v-1500w-rear-hub-motor-electric-bike-conversion-kit-1418.html
* …

Package Content:
1 x BMX 20 inch 48V 52V 1500W rear hub motor wheel (Fit for 110mm rear dropout)
1 x 48V / 52V 1500W 18-MOSFET motor controller
1 x LCD
1 x Twist throttle — Cable length: 1500mm
1 x Brake levers — Cable length: 1500mm
1 x Three button switches ( control cruise… ) — Cable length: 1500mm
1 x Pedal assist — Cable length: 900mm

Net Weight: 11.0 kg
Package Size: 50cm L x 50cm W x 25cm H
Package Type: Cardboard Box

27.5 inch 48V 52V 1500W rear wheel – 650b electric hub motor kit

Posted by on April 5, 2025 No comments

This 27.5 inch bike conversion 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.

This 27.5 inch hub motor kit can work with a 48V or 52V battery.

More info about this 27.5 inch bike motor kit

27.5 inch Cassette hub motor kit video

27.5 inch Freewheel 7 x 9T hub motor video

Main Features:
>. Rim A: 27.5 inch double wall Alloy (Rim Fit For: 27.5 × 1.5″ / 1.75″ tire)
>. Spoke: Black 12 gauge / 165mm Length × 36 pcs

>. Rim B: 27.5 inch double wall Alloy (Rim Fit For: 27.5 × 1.95″ / 2.0″ ~ 2.5″ tire)
>. Spoke: Black 12 gauge / 172mm Length × 36 pcs

>. Engine: Bldc hub motor
>>. Voltage: 48V / 52V
>>. Power: 1500W
>>. Efficiency: 90.5%
>>. Max speed: 73.1 kmh — 45.4mph Default
>>. Mechanical brake: Disk or  V
>>. Sprocket: Freewheel or Cassette
>>. Cable location: shaft end, LEFT
>>. Cable length:100cm / 40″ — Update “3mm phase wires” & “Newest version hub”
>>. Install: spacing of Min 135mm to Max 155mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
>>. MOSFET: 18 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 / 52 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 1500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 40 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 155 mm L × 72 mm W × 38 mm H

With LCD, More Function:
* Cruise — Green button Control (While motor is working,press green button one time,it will be “CRUISE” – running as the same speed)
* Reverse — Yellow button Control (“Left side & mid / forward — “Right side / backward”)
* Kmh / mph
* Throttle speeds ( 0 – 5 ) — “0” is off throttle. “1” is the slowest. “5” is the fastest.
* Pedal assist speed ( 0 – 5 ) — “0” is off pedal assist. “1 ~ 5” is the fastest. ONLY one max speed. If hope pedal with 5 kinds of max speeds, please choose the other controller of ours. Please click below link:
https://www.leafbike.com/products/diy-bike-conversion-kit/27.5-inch-48v-1500w-rear-electric-hub-motor-kit-1445.html
* …

700c 48V 52V 1500W front wheel electric hub motor kit

Posted by on April 5, 2025 No comments

This 700c 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.

This 700c hub motor kit can work with a 48V or 52V battery.

More info about this 700c bike motor kit

Main Features:
>. Rim: 700c double wall Alloy (Rim Fit For: 700 × 18C / 20C / 23C / 25C / 28C / 32C / 35C / 40C)
>. Spoke: 12 gauge / 184mm Length × 36 pcs
>. Default: Black spokes
>. Optional: Silver spokes — Please leave message.

>. Engine: Bldc hub motor
>>. Voltage: 48V / 52V
>>. Power: 1500W
>>. Efficiency: 90.5%
>>. Max speed: 71.8 kmh — 44.6 mph
>>. Mechanical brake: V
>>. Cable location: shaft end, LEFT
>>. Cable length:150cm / 60″
>>. Install: spacing of 100mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
>>. MOSFET: 18 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 / 52 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 1500 Watts
>>. Casing material: aluminum
>>. Maximum Current: 40 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 155 mm L × 72 mm W × 38 mm H

With LCD, More Function:
* Cruise
* Kmh / mph
* Throttle speeds ( 0 – 5 ) — “0” is off throttle. “1” is the slowest. “5” is the fastest.
* Pedal assist speed ( 0 – 5 ) — “0” is off pedal assist. “1 ~ 5” is the fastest. ONLY one max speed. If hope pedal with 5 kinds of max speeds, please choose the other controller of ours. Please click below link:
https://www.leafbike.com/products/diy-bike-conversion-kit/700c-48v-1500w-front-hub-motor-kit-1460.html
* …

Package Content:
1 x 700c 48V / 52V 1500W front hub motor wheel
1 x 48V / 52V 1500W 18-MOSFET motor controller
1 x LCD
1 x Twist throttle — Cable length: 1500mm
1 x Brake levers — Cable length: 1500mm
1 x Three button switches ( control cruise… ) — Cable length: 1500mm
1 x Pedal assist — Cable length: 900mm

Net Weight: 11.7 kg
Package Size: 66cm L x 66cm W x 25cm H
Package Type: Cardboard Box

700c 48V 52V 1500W rear electric hub motor kit

Posted by on April 5, 2025 No comments

This 700c 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.
This 700c bike motor kit can work with a 48V or 52V battery.

More info about this 700c hub motor kit

Main Features:
>. Rim: 700c double wall Alloy (Rim Fit For: 700c x 18C / 20C / 23C / 25C / 28C / 32C / 35C / 38C / 40C tyre)
>. Spoke: Black 12 gauge / 184mm Length × 36 pcs
>. Default: Black spokes
>. Optional: Silver spokes — Please leave message.

>. Engine: Bldc hub motor
>>. Voltage: 48V / 52V
>>. Power: 1500W
>>. Efficiency: 90.5%
>>. Max speed: 72.9 kmh — 44.9 mph Default (Optional other speed: 30mph,25mph…please leave message)
>>. Mechanical brake: Disk or V
>>. Sprocket: Freewheel or Cassette
>>. Cable location: shaft end, LEFT
>>. Cable length:100cm / 40″ — Update “3mm phase wires” & “Newest version hub”
>>. Install: spacing of Min 135mm to Max 155mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
Default: Heat Shrink Bullet Crimp Female Male Wire Connectors Electrical Terminals for battery plug.(Leave message Optional: XT-60)
>>. MOSFET: 18 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 / 52 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 1500 Watts
>>. Casing material: aluminum
>>. Maximum Current: 40 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 155 mm L × 72 mm W × 38 mm H

With LCD, More Function:
* Cruise
* Reverse
* Kmh / mph
* Throttle speeds ( 0 – 5 ) — “0” is off throttle. “1” is the slowest. “5” is the fastest.
* Pedal assist speed ( 0 – 5 ) — “0” is off pedal assist. “1 ~ 5” is the fastest. ONLY one max speed. If hope pedal with 5 kinds of max speeds, please choose the other controller of ours. Please click below link:
https://www.leafbike.com/products/diy-bike-conversion-kit/700c-48v-1500w-rear-electric-hub-motor-kit-1464.html
* …

Package Content:
1 x 700c 48V / 52V 1500W rear bike motor wheel
1 x 48V / 52V 1500W 18-MOSFET motor controller
1 x LCD
1 x Twist throttle — Cable length: 1500mm
1 x Brake levers — Cable length: 1500mm
1 x Three button switches ( control cruise… ) — Cable length: 1500mm
1 x Pedal assist — Cable length: 900mm

Net Weight: 11.7 kg
Package Size: 66cm L x 66cm W x 25cm H
Package Type: Cardboard Box

28 inch 48V 52V 1500W front wheel electric hub motor kit

Posted by on April 5, 2025 No comments

28 inch 48V 52V 1500W front wheel – electric hub motor kit

More info about this 28 inch hub motor kit

Main Features:
>. Rim: 28 inch double wall Alloy (Rim Fit For: 28 × 1 1/2″ tire)
>. Spoke: 12 gauge / 184mm Length × 36 pcs
>. Default: Black spokes
>. Optional: Silver spokes — Please leave message.

>. Engine: Bldc hub motor
>>. Voltage: 48V / 52V
>>. Power: 1500W
>>. Efficiency: 90.5%
>>. Max speed: 74.4 kmh — 46.2 mph
>>. Mechanical brake: V
>>. Cable location: shaft end, LEFT
>>. Cable length:150cm / 60″
>>. Install: spacing of 100mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
>>. MOSFET: 18 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 / 52 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 1500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 40 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 155 mm L × 72 mm W × 38 mm H

This 28 inch bike motor kit can work with a 48V or 52V battery.

Technical problem with a 20 inch 48V 1000W bike kit – problem solved

Posted by on April 5, 2025 No comments

Today I hit in a technical problem with the 20inch 48V 1000W bike conversion kit (Item ID:#LBCK20481000FN). I was riding for a shorter distance steep uphill in level 5 and suddenly the bike motor was making an obscure humming sound and was vibrating very strong. So I stopped immediately and shut down the system. I checked the hub motor and the cable for overheating but they where just with normal temperature. After a while, I already turned to go back downhill, I started the system again but the problem still exists. It seems that it is maybe a problem with the controller because now there is no reaction in changing the power level (1-5) or turning the throttle on. The hub motor gets only around 10 Amps with a max. of 590W (measured with a installed Amp/Volt meter in between). When starting pedaling or with the throttle with low speed the vibrations are immense but when I gain more speed the vibrations are reducing to a lower level but they are still there. When staying still and pull the throttle full, so the tire normally can spin free, only the vibrations and a loud humming sound exists. I know I do not have any warranty more leftover on this system but maybe you have an idea how I can repair this for a budget price.

I already solved the bike conversion kit system problem.
Funny what unexpected small things could cause some different technical reactions. The problem of the bike conversion kit problem above was, that one of the 3 phase cables to the motor was broken. By the effect of the depicted problems above I really thought that something in the controller was burnt-out but happily I could find the broken cable very soon so now everything
works fine again.

Buy an electric hub motor kit

Posted by on April 5, 2025 No comments

I’m very interested in buying an electric bike kit as soon as possible for my bicycle (26 inch rim )and I found your page but I would like to know about all the models you’ve got from the smallest to the biggest and strongest ;and THE PRICES of these and all the specifications:
speed (km/h)
torque
durability
distance of charge
weight (of the electric bike kit)
weight (it can carry)
does it come with battery what type of battery (lithium ,lead)
voltage
amperage
watts
rims what type of rim

I’m not really interested in the rim (inch)but some info would be good ,I want to find out about these brushless hub motor

I need something that lasts 70 km and runs at 60 km/h on a flat surface with lots of power like to move 150-180kg of weight (bicycle me, hub motor, and a little extra weight)

what does the electric bike kit include?:hub motor battery controller throttle, brake lever, pedal sensor BATTERY MEASURE etc.

and what combinations can the electric bike kit fit 36v – 48v – 24v -6,7,8,9,10 amps if possible

the same for the rear motor and for the front hub motor

(front rear) sizes, types ,performances PRICES and everything they can do the thing is that I live in wide mountains so I need something strong but lasting for I live far away of the city.

27.5 inch 48V / 52V 1000W rear electric hub motor – 650B bike conversion kit

Posted by on April 5, 2025 No comments

* The conversion 27.5 inch bike motor 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: 27.5 inch / 650B double wall Alloy
>. Spoke: 12 gauge / 164mm Length × 36 pcs

>. Engine: Bldc hub motor
>>. Voltage: 48V
>>. Power: 1000W
>>. Efficiency: 90.5%
>>. Max speed: 71 kmh — 45mph
>>. Mechanical brake: Disk or V
>>. Freewheel / Cassette: space for 6 or 7 gears
Default: install screw thread Sprocket (If install Cassette Sprocket,please leave message)
>>. Cable location: shaft end , LEFT
>>. Cable length:100cm / 40″
>>. Install: spacing of 135mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
>>. MOSFET: 12 PCS
>>. With LCD: YES
>>. 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

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
* …

Package Content:
1 x 27.5 inch / 650B 48V 1000W rear hub motor wheel
1 x 48V 1000W 12-MOSFET motor controller
1 x LCD ( display speed, mileage, battery gauge.. )
1 x Twist throttle — Cable length: 1500mm
1 x Brake levers — Cable length: 1500mm
1 x Three button switches ( control cruise, regen brake, reverse .. ) — Cable length: 1500mm
1 x Pedal assist — Cable length: 1500mm

Net Weight: 24.5 lbs
Package Size: 58cm L × 23cm W × 58cm H / 22.8″ L x 9.0″ W x 22.8″ H
Package Type: Cardboard Box

26 inch electric hub motor kit for the dropout 160mm fork

Posted by on April 5, 2025 No comments

Q: Are you able to supply a rear hub motor kit wheel (36v @ 500W – 750w) for a rear dropout of 160mm?
I have an existing e-bike that uses a 250w geared rear hub drive on a 26 x 1.95 wheel.
It has a 7 speed gear, standard 160mm disk brake and a bike mount (frame) width of 160mm.
I would be happy to go from a geared (small hub) to the larger electric bike motor kit type.
The existing bike frame is steel (not carbon or an alloy) so I may be able to ‘bend’ the rear forks… (fit).
I have included a PDF diagram (attached) to show the existing rear hub motor fitting size.

A: Yes, we have dropout of 160mm 36V 750W electric bike motor.

Q: With the new Leaf controller and LCD, I know I can limit the maximum output speed of the 750w Direct Drive hub motor to a set (safe) maximum speed for each PAS mode 1 – 5.
With our Australian laws, I want to honor speed and safety – yet have a safe speed and torque (reserved) for hills.
I respect that you have kindly supplied my order with a 320RPM hub motor ( a good choice).
My question is: “Does the max speed by set by LCD / Controller economically limit the maximum current sent to the hub motor”?
I am talking here about battery life with a low speed LCD / Controller setting ‘modulating’ the full power sent to the hub motor.
So if I program the setting to say 25Km/h, then is the torque output effected at speeds less than the given 25Km/h?

A: Yes, if you set max 25kmh by LCD, motor will work less than 25kmh.(You can set max 10kmh,11kmh,12kmh….48kmh,49kmh,50kmh)

1.Press “SW” from LCD. Turn on LCD
2.Press “up” &”down” together for more than 2 seconds in 3 seconds after LCD display – Then “72” will flash.
3.Press “down” or “up” to set any max speed. Press “SW” one time to save. Then “26” will flash. It’s tire size. Don’t set. Still press “SW” one time to save. Then “kmh / mph” will flash. Don’t set. Press “SW” one time to save.
4.At last, press “SW” more than 2 seconds, then will be back.

There is a Three button switch inside parcel.

** Black switch (be Left side / Middle – motor works forward. Be right side, motor works backward/reverse)
** Red switch (Be left side / regen off. Be right side / regen on)
** Green switch ( When motor is working, press this green switch one time. LCD is display C, motor will work as the same speed) – Re-press this green switch one time, or press brake lever, turn throttle to max, motor will stop.

S mine fan bldc motor three frequency high-voltage electric tricycle china application

Posted by on April 5, 2025 No comments

S mine fan bldc motor three frequency high-voltage electric tricycle china application
 
Abstract: A crystal by controlling the frequency control to achieve a level, no level adjustment in the electric tricycle china installation and large-scale mine owners bldc motor in the application.
Keywords: three-conversion,electric tricycle china installation

Specificity due to the production of coal, the mine ventilation system related to mine safety in production, so the ventilation system in the coal production has a pivotal position. As long supply line, starting pressure drop, maximum protection devices for safe and reliable start-up and standby bldc motor starter switch, the top priority is to enhance the system reliability. Yangquan Coal Mine in NZ in November 2006, new investment and operation of the main fan bldc motor for the GAF-type axial bldc motor (check the bldc motor by the largest coal mine in Asia through bldc motor controller). The main fan motor 10KV 5000KW bldc motor asynchronous motor. In order to better address the project encountered in starting the impact on the grid, and the problem of load impact, the system used by the Liaoning Rongxin Power Electronic Co., Ltd production of three self-developed high-voltage electric tricycle china frequency equipment.

1, electric tricycle china several Starting device

Divided by the motor starter schematic: 1, reduced voltage starting methods. Traditional vacuum motor starting methods are Y-Δ start, decompression starting auto transformer, reactor start-up and so on. These methods belong to a class start decompression start, there are obvious shortcomings, the process of starting a secondary impact of current. The current high-pressure common way for liquid resistance starter starter, SCR series decompression start. 2, variable frequency start method. With the development of IGBT technology, high frequency voltage levels and larger capacities, but because of the price factor has restricted its development.

Rongxin Power Electronic Co., Ltd., on the basis of the SVC successfully developed three high frequency electric tricycle china, it has three characteristic frequency stepless regulator.

2, three frequency high-voltage electric tricycle china technical principles and characteristics

High-voltage soft-start power supply and motor in series between the main circuit shown in Figure 1.
 
Figure 1 Main circuit diagram

Three frequency high-voltage soft-start technology, the first SCR in series, then by controlling the conduction angle of SCR to achieve a level FM, and non-polar voltage regulator functions. Starting early by controlling the valve in the SA, SB, SC was to achieve a turn-on frequency 12.5HZ, the motor of 1 / 4 the rated speed when the control valve SA, SD, SE switch to 25HZ, the motor to achieve 1 / 2 rated speed, through the control valve SA, SB, SC to complete the full range of the switching process, and ultimately reach the rated speed, the bypass is closed off electric tricycle china trigger pulse to complete the starting process. Throughout the starting process in the three frequency points, while adjusting the frequency, change the output voltage to maintain constant voltage to frequency ratio, so that you can ensure that the entire starting process, the starting torque to keep the rated torque of 80 -90%, while the starting current can be controlled at about 2 times the rated current. Starting torque, starting current, is a three-frequency high-voltage electric tricycle china’s largest technical characteristics.

3, S miners fan motor in the practical application.

Yangquan Coal Mine S is a new mine, it’s power capacity is 35KV, 10000KVA, because the grid is responsible for the underground, Inoue electrical equipment supply, so the grid is relatively small margin, in order to ensure the process does not affect the start Other devices running on the main fan starting current requirements are very strict. And because it is located in the high-gas area, which uses negative pressure was high winds axial bldc motor (two-stage fan is currently Asia’s largest mining axial bldc motor), the main fan motor power of 10KV, 5000KW. Throughout the starting process, showing the starting torque, starting current, a smooth start, the advantages of starting a short time. Measured data in Table 1.