Tag Archives: bike motor - Page 2

set bike motor controller

Posted by on September 3, 2023 Comments Off on set bike motor controller

Q: When I have put on the washers and Shimano cassette lock ring the dropout spacing goes from 135mm to 140mm. Is this normal? It is a tight fit in an aluminium mountain bike frame and I have to press a bit with my thumbs but it does go in ok and then the wheel spins fine. Does this sound ok?

A: This cassette version hub motor should reach about 137~140mm.
It’s normal.

Q: Many thanks for a great bike motor and fast reply to emails. Just posted a rave review. Only issue is many ebikes could do with more info. regarding programming for hub motor controllers and displays.
I’m trying to program for a KT-LCD3 display so can you tell me the
P2 Wheel Speed Pulse Signal Setting (pulses per revolution)
C2 Motor Phase Classification Coding Mode (I’m using a KT sine wave controller)

I’ve already got this manual and it does NOT tell me the specific answers to my 2 questions. Please pass my questions on to one of the electrical engineers at Leafbike.

A:
P manual comes with LCD.
Set P as below:
P1= 46
P2= 0
P3= 1
P4= 0
P5= 15
Don’t set C.

Q: Thanks and will try out the settings.

Order inquiry for bike motor and spokes

Posted by on August 30, 2023 Comments Off on Order inquiry for bike motor and spokes

Q: I am looking for a rear hub motor, however I can not find in your website. I need a rear bike motor installed in the rim. My rear wheel tire is 27.5” x 2.4”. I am looking for only 1000w 48v.
 If you have in stock, please send me the link so I can go forward with a purchase.

A: Please click below site.
Rim is 32mm width. Fit for 27.5 x 1.95″ ~ max 2.4″
https://www.leafbike.com/products/e-bike-hub-motor/27.5-inch-48v-52v-1000w-rear-bike-motor-wheel-1374.html

Q: Thank you for your response. I have a question for you. What is the sprocket type? I am looking for a freewheel sprocket. 

A: Default: freewheel

Q: Before I begin to purchase a new hub motor I want to mention something. 4 years ago I ordered a 48v 1000w 700c rear wheel bike motor e bike kit from leaf bike,  and I still have it till this day….I enjoy using it and I am having a lot of fun with it and I want to keep it….I recently ordered a brand new bike and I really want to exchange my original e bike kit into my new bike, however my new bike is on a different size rim (27.5” x 2.4”). 
I have begun this project of mine and I am facing a problem with my spoke install. I ordered 36 x 170mm spokes from a bike store, installed the 1st and 2nd set of spokes easily, however, to do the 3rd and 4th set is impossible as I can not reach the rim hole. I noticed on your website that size 170mm spokes are the correct size length, they are 12 gauge, I followed the exact same spoke  pattern as the 700c wheel, yet I have no success. What am I doing wrong? 

A: 700c rim is about larger than 27.5 inch
27.5 inch is a little than 26 inch

Leaf Ebike Kit Questions

Posted by on August 4, 2023 Comments Off on Leaf Ebike Kit Questions

Q: I would like to purchase a 27.5″ electric hub motor kit that fits in 135mm dropouts and I have a 72v (20s) battery capable of 80A continuous that I would like to use.  Several questions please:
A. Can I buy a 27.5″, Freewheel, Rear, Wide Rim, kit that fits in 135mm dropouts with the “2000W ~ 5000W programmable controller” instead of the controller that normally comes with the hub motor kit and if yes, what would the total price of the hub motor kit be before shipping cost are added?
B. What is the internal width of the widest 27.5″ rim you have available?
C. Can I get the 5mm phase wires with the motor configuration I specified in “A.” above?  If yes, how much would it change the price?  If no, what are the largest diameter phase wires I could get?
D. Do all Direct Drive Leaf motors now use the .035″ thick laminations?  I would definitely want them. 

A: A. 135mm dropout – max make 48v 1500w rear bike motor,see below drawing. no room to make 2000w motor. (This 48v 1500w motor with 3mm phase wire can work with 48v or 52v or max 60v)
https://www.leafbike.com/u_file/2301/01/photo/1500w-rear-bike-motor-drawing_53f4287594.jpg 

     But, if no freewheel, not pedal, can make it to be 48v 2000w front bike motor(see below drawing) that fit for 135mm dropout and can use “2000w~5000w programmable controller”
This 48v 2000w motor with 6mm phase wire can work with 48v or 52v or 60 or 72v batteries.
https://www.leafbike.com/u_file/2301/07/photo/2000w-front-beach-snow-fat-bike-motor-drawing_bbdbc1e4ce.jpg 

We have three kinds of 27.5 inch rim, one is 23mm width, the other two is 25mm and 32mm width.   (Max 32mm width)

If 26 inch, we have 25mm, 32mm, 80mm width rims.

B. Our 27.5 inch 32mm width rim, internal width is 25mm

C. 48v 2000w can use 5mm or 6mm phase wires.  (But 48v 1500w max use 3mm phase wires.

D.  All of our motors use .035″ thick laminations

Q:
Two more question regarding the “48v 1500w rear bike motor” phase wires: 

A. Are the phase wires 3mm in diameter or 3mm in cross sectional area? 

B. Is the 3mm dimension for the actual copper wire or the overall including the insulation? 

Inquiry Hub bike motor

Posted by on February 20, 2023 Comments Off on Inquiry Hub bike motor

Q: Cengalo is a Startup for a 4 wheeled lightweight car with 2 bike Hub motors on the rear wheels.
We plan a speed of approx 75 Km/h, downhill, with 20 inch wheels.
Can you offer the 48V 52V 1500W front spoke hub motor – electric bike motor with appox 800 rpm?
Motor type: brushless bike motor
Voltage: 48V / 52V
Power: 1500W
Max efficiency: 90.5%
RPM: 600
Mechanical brake: V
Cable location: shaft end, Left
Cable length:150cm / 60″
Install: spacing of 100mm fork
Noise: < 60 db Surface: Black painted Net weight: 6.9kg / 15.2 lbs Gross weight: 7.8 kg ( after packing ) A: 48V 52V 1500W front spoke hub motor - electric bike motor with appox 600 rpm. It's very fast. (Default the fastest) But also, we can make faster bike motor (over 700rpm) Q: The higher speed hub motor can be interesting for the vehicle. Than we can use 48V battery. We have yet to decide if the vehicle is 48 or 72 volts batteries. With the higher voltage (72V) battery, the same hub motor would have a 1.5 times higher speed. Do you have experience what is better for the car? A: This 1500w bike motor max use about 2.5mm phase wires. Can work with 72v battery. But uphill,if cable too hot,should stop at once. Q: Can you give a wholesale quote for the 1500W front spoke hub motor 100 psc / 500 pcs / 1000 pcs per order? We calculate the Cangalo Smartcar with this offer. Unfortunately we can't place an order until 28.2. We have to develop the vehicle, Cengalo Smartcar, first. You always answered quickly and hopefully will continue to do good prices in the future, so we can well imagine ourselves with Leafbike as a long-term supplier work.

What’s the difference between 36V 500W,36V 750W and 48V 1000W hub motors

Posted by on May 11, 2022 Comments Off on What’s the difference between 36V 500W,36V 750W and 48V 1000W hub motors

Q:What’s the difference between 36V 500W,36V 750W and 48V 1000W hub motors

A:36V 500W,36V 750W and 48V 1000W hub motors are all used for electric bikes,also called electric bike motors.They have the same figuration.These three motors are all made of the same hub,covers,
axis,bearings,hall sensor.So they look the same,but they have different magnet and rotor-winding.

36V 750W and 48V 1000W are the same hub motors,just work at different voltage,has different watts.

But for 36V 500W × 36V 750W（48V 1000W）
The difference between them is that gauge of the coil wires,turns number of the coils and height of magnet.

The height of 36V 500W hub motor’s magenet is 24mm,but 750W hub motor reach 30mm.Picture enclosed.

In market,36V 500W is easy to find it,but difficult to find real 36V 750W hub motors.

In China,36V 500W(48V 600W) motors are very popular and used for electric bikes,these motors seem to ours,but No.The height of our magnet is 6mm more than as usual,reach 750w or 1000w.North America like them,more like high speed motors,we can customize motor speed as customers’ actual need.

Now 26″ 36V 750W bike wheel reaches 20m/h and the speed of 48V 1000W is 27m/h.It’s standard speed.

1500W Leaf Motor with 20″ x 4″ wide “Fat Bike” wheel

Posted by on May 11, 2022 Comments Off on 1500W Leaf Motor with 20″ x 4″ wide “Fat Bike” wheel

Q:Do you sale 1500w or higher hub motor laced into wheel that is 20” diameter by 4” wide for fat tire bike? If so, what are the dropout width options for axle? Can axle dropout width be 150mm wide or even wider? I have a bike frame with 170mm dropout width. I can use torque arms and spacers to fill some of this space, but not too much.

If available please quote price for:
~1500w newest model hub motor with 20” diameter x 4” width wheel (pre-laced service)
~Need motor/wheel laced with 1 cross pattern. Radial lacing is acceptable but not preferred. Black spokes preferred.
~Need 150mm or wider axle dropout width.
~Need turn count which contains HIGHEST AMOUNT COOPER FILL
~Need temp sensor pre-installed in bike motor
~Need single speed freewheel (11 or 12 tooth preferred) pre-installed
~Need SHIPPING to U.S

Also, can you sale with 750W sticker or engrave on bike motor?

A: We can make this 20 * 4 wide Fat Bike wheel.
Please click below site. This is our 20 inch 48V 1000w Fat bike wheel – It’s 20 inch bike conversion kit for fat snow bike.

We also can make 1500w bike motor.
* 1500w with 20 * 4 — Okay. (If your tire is 20 * 4 “, 20 * 3” rim is much better fit for 20 *4” tire. Also,we have 20 *4” rim)
* Please click above site. Wheel looks the same this one.
* At least the dropout 170mm or more
* With temp
* Can use single speed.But min 16 tooth can be installed on this motor. (Can’t use 11 or 12 tooth,only no motor hub use this 11,12)
* Ship to USA is okay.

Q: The tire is “Stingray tire” type. 20″ * 4 1/4″. If you think 3″ wide wheel will fit better ok. 16t freewheel is ok. Rather 1500w if motor will handle more power. Which turn count do you recommend for speed 35mph?

A: We recommend leaf 13 * 5T winding rotor.

1500w rear hub motor with bike rim

Posted by on May 11, 2022 Comments Off on 1500w rear hub motor with bike rim

Q: I’m looking for a powerful direct drive rear hub motor for a 26″ MTB.
I’ve been looking at this motor:
1.Is this the best 26″ rear hub motor you have or do you recommend any other bike motor?
2.Can this hub motor be delivered with a temp sensor installed?
3.What type of gear cassette will it be able to fit with a 135mm dropout? (How many gears)
4.Can this bike motor run higher than 48 Volts? 52 Volt maybe? Or 72 Volt?

A: 1. We have 26 inch 48V 1500W rear hub motor. We recommend this one
2. With temp
3. Max 7 speed and fit for 135mm dropout. Default for screw on sprocket.(If you need to install cassette sprocket, should leave message when you order.
4. We recommend work at 48V battery.(Max 60V)

Q:Can this same rear hub motor also be delivered with a 27.5″ x 50mm tubeless rim?
I will install a 7-speed cassette sprocket, so very good that it supports this.

A: 27.5” and 26 inch are different rim.
If 27.5” rim is smaller than 700c and larger than 26 inch rim?
* If you need to install your 7-speed cassette sprocket. Please Note when you order.

Q: I want to use the newest 1500w hub motor in this bike:
If you press the green + (View all components) on the page you can see that it has 27.5 INCH x 50mm, tubeless ready rims and 142x12mm (Ai offset lacing) rear drop out.

So I’m wondering if you can deliver the hub motor with a rim that’s the same dimensions as the original rim?

A: We have some sample of 27.5 inch rim in stock. Looks the same to the one on your site.
We only ship two 27.5 inch hub motor kits to USA one time two month ago.(ONLY one customer need this 27.5 inch by now)
This 27.5 rim is smaller than 700c and larger than 26 inch.

Q: This sounds good. Thank you for even taking pictures.
How wide is the 27.5″ rim you have? (How many millimeters)

Bike kit=bike motor+motor contorller?

Posted by on January 14, 2022 Comments Off on Bike kit=bike motor+motor contorller?

With gasoline price ↑ day by day,more and more bike fans from Europe and North America would like to convert their bicycle into electric bicycle, because of some reasons,it’s necessary to convert by their selves:
1.Ride a common bicycle for a long distance is very tired,hope have an electric bicycle
2.Buy an electric bicycle,it’s too expensive and single type is not everyone likes;
3.Buy a bike kit,the best choice.Cost less and still can use common bicycle

1 set of bike kit includes: 1 pcs of bike motor with rim,1 set of brushless motor controller,1 set of throttle,1 set of brake leaver,1 set of switch,1 set of battery and front&rear lights,freewheel,disc brake…

Leafmotor has all kind of bike kits are fit for Europe and North America.
Eg:20″ 24″ 26″ 27.5″(650b) 700c 28″ 29″ 27″ rim front & rear wheel with 36V 750W&48V 1000W motor,these 36V kits work with 12-MOSFET motor controller and 48V works with 15-MOSFET brushless controller,have thumb throttle and twist throttle for customers to choose.Front kits are fit for standard 100mm front fork,rear kits are fit for standard 135mm rear frame fork.Speed:20m/h.Rear motor can be install disc brake and front motor should use V-brake.These kits are fit for North America,but now more and more Europe fans like these powerful kits.

If you are in Europe,we still suggget you order 250W motor that is fit for your local law.
Eg:20″ 24″ 26″ 27.5″(650b) 700c 28″ 29″ 27″ rim front & rear wheel with 24V 250W&36V 250W motor,these kits work with 6-MOSFET controller,LCD.This LDC can display speed,battery gauge,milage..Still have thumb throttle and twsit throttle to choose.Both of front and rear motor can be installed disc brake.And both fit for standard fork.Speed:15m/h

Bike kit>bike motor + motor controller..

order a bike kit from leafmotor

Posted by on January 14, 2022 Comments Off on order a bike kit from leafmotor

Oct 12th,2011 Order a bike kit from leafmotor’s Internet shop.
Detail:Bike Conversion Kit Item# 700c 701kit -1 -36F
Product list:
1.700c 36V 250W HBM-011 brushless geared bike motor front wheel,more powerful than others in the market
2.36V brushless controller working with LCD can display speed,milage,battery gauge..It’s very cool.
3.twist throttle looks nice
4.brake lever
5.three-button switches
6.PAS
Oct 14th,2011 Leafmotor shipped my package to ××× CA,USA
EMS tracking number:EE266×××718CN
Oct 17th,2011 Monday morning received my package.
Very surprize with quick and nice service.
See my package:

Three-phase bike motor torque

Posted by on January 14, 2022 Comments Off on Three-phase bike motor torque

Three-phase bike motor torque

Symmetrical three-phase winding leads to symmetrical three-phase currents produce a rotating magnetic field, magnetic field lines cutting the rotor winding, according to the principle of electromagnetic induction, the rotor winding produce e and i, the rotor winding in the magnetic field by the electromagnetic force, which produce the electromagnetic torque the rotor spin, the rotor output mechanical energy to drive the mechanical load spin.

In the AC motor, when the AC current through the rotor winding, the establishment of the armature magnet force, its electrical energy conversion and operating performance has a significant impact. So pass into the three-phase AC three-phase AC winding generate pulsating magnetic momentum, the magnetic momentum can be decomposed into two equal in magnitude, opposite the rotation speed of the magnetic momentum and to create in the gap and reverse Story magnetic field and. The two rotating magnetic field cutting the rotor conductors, and conductors were generated in the rotor EMF and induced current.

The current and the magnetic interaction of positive and negative torque. Forward torque is an attempt to make the rotor turn; attempt to reverse the rotor torque reversal. Superposition of the two torque motors turning up is to promote the synthesis of torque.