Category Archives: BLDC motor

12 inch 48v hub motor for electric scooter

Posted by on March 23, 2025 No comments

We are interested in your 12 inch hub motor kit.
What is the max speed available for this 12 inch electric scooter motor. I can use a low speed hub motor on the back and a high speed motor on the front to compensate for the torque at low speeds.

If last time faster speed hub motor is okay.We can make this electric scooter motor to be faster.（about 20 – 30% faster)

I recently put in an order for two rear hub motors similar to what I have ordered in the past.

Can you make the hub motor fit a standard front fork?

Yes,if not install disk brake on this front motor.
We can make it with the same covers.And hub motor will in the center.
But it will takes about 7 days to customize shaft.
It’s fit for standard 100mm front fork. (90mm fork is also okay)

This front 12 inch hub motor only use V-braking system.
We should check if has correct shaft for this motor in stock.If no,it takes about 7 days to customize this shaft.

Yes,we have 48V 18A controller with LCD for this electric scooter motor. (We don’t have LCD with controller)

Please confirm that the following will be applied to the order.
On center with no disc brake
Please make highest speed – 20 MPH speed using 48 Volt electric bike battery.

Please make sure below 1 & 2
1. the same to past order. It’s rear hub motor. Two side covers are the same with screw thread for spokes & flange — (in the center)
2. would you faster than past ?

I am looking to order more hub motors and would like get updated pricing.
Do you still have the information from past orders?

Yes. We still have 12 inch hub motor.
But we found your order is different from standard motor.
Could you take a picture with your 12 inch motor, front or rear ?
What max speed on 36v or 48v?

Purchase electric bike motor for Supermarche Ebike

Posted by on March 23, 2025 No comments

I a planning to buy a yuba supermarche here in spain.. It costs 2500 euros.. but with the e-bike system goes up to 5800 total!
How can it be possible that I see one electric bike motor in your website so strong and so cheap compared?

If you can help me with the best setup for my needs I will buy electric bike motor from you:

I would like to be able to ride to the town with stores and buy stuff and come back.The town is 16 km far away going down.. my place is at 250 altitude and the town is at 100 altitude,so i will be going down to the store empty and going back with all the stuff.
I don’t want to feel that i can’t use the bike to its maximum.. so I want a good electric bike motor.
(even dual electric bike motors if possible) and good battery.
So i don’t have to worry about not being able to bring whatever I want to bring.. considering the max 150kg of the electric bike.

We recommend our 48v 1500w electric bike motors with 48v 20ah lithium battery.
About the electric bike motor speed,we can make it with low speed & large torque.

How Long I could ride with that and how fast? could be possible adding another electric bike motor to improve speed at certain moments without loosing torque? How much Would it cost me these 2 options?

About 40km per charge.One 75kg rider ride it last 40km per charge.I mean one 50Kg rider carrying 75Kg of stuff.

Problem with PAS

Posted by on March 23, 2025 No comments

The reason I did not use your PAS was.I don’t have the tool to remove the crank arm. This one I used installs with out removing the crank arm. Yours is a small ring and would be hard to get the sensor close to the magnet disk. The aluminum ring would not fit my crank anyway, too large. My bike is a 1980 vintage Schwinn.

I am a retired electrical engineer,so I took some pictures for you on an oscilloscpe and meter I own. The signal makes it to the controller because I made the connections at the controller connector.

Image 281 shows that there is 4.2 volts on the red and black wire, which is about right. Image 289 shows the PAS sensor and pickup for it mounted on the bike. The distance between the magnets and the pickup is not critical as I tried several different distances. Image 287 is a picture of the signal making it to the controller as the crank is turned. The upper trace is the 4.2 volts on the red and black wire. The lower trace is the signal to the controller.

I notice that the signal is relatively low only 1/2 volt tall.

I solved the problem. I tried your sensor with the magnet wheel already on my bike. Hub motor works as it should. The pick up with the LED does not put out a strong enough signal for the controller. Yours does, as long as it is close to the magnets. The hub motor are controller are good. Thanks for the help.

The oscilloscope waveform was the only way to tell what was bad. Your waveform goes from and to + voltage as it should .

What does the tool look like for the spokes? The hub motor wheel is a little out of round. Some of the spokes are not seated in their hole on the hub motor so that may be the issue.

question about BLW-20B 20 inch electric hub motor

Posted by on March 23, 2025 No comments

Your E-bike company may just be what I’ve been looking for a while now, though I have a least another set of questions before I attempt to make a purchase to ship over.

I am working on spec-ing out some parts for an electric-vehicle project. I am hoping to build it soon, but I need some information about the hub motor model:BLW-20B. Please see my questions below:
The power rating on the electric bike motor says 1500~5000W. Does this mean there is a range of options I can specify? Does this mean this hub motor will function on this whole spectrum and my electric bike motor controller will determine what the actual power load is?

Is there a product manual for this piece of equipment?
The electric bike batteries I am looking at are rated for a 3000W hub motor. Will these be sufficient?
I am looking for a recommendation on the hub motor controller for this electric bike motor. Could you recommend a part?

We can make this 20 inch hub motor to be 48V 1500W, 48V 2000W, 48V 2500W.
Also,this electric bike motor can work at 60V,72V hub motor controller & electric bike battery… If works at 72V, it can reach 5000W

We have this programmable hub motor controller that can fit for this electric bike motor.(This hub motor controller can work 40V ~ 100V)

48V 1000W rear spoke hub motor – electric bike motor

Posted by on March 22, 2025 No comments

BRAND NEW LEAF BIKE 2025 Version Black Lightning Brushless, Gearless 48v 1000w hub motor !
New powerful and efficient Gearless spoke hub motor custom made with higher grade laminations, wider magnet stack, high speed bearings, Honey well hall sensors, more copper fill, and all out higher performance. We went through all the stops to make this motor on the market.

This 48v 1000w hub motor has the more acceleration at low end, better mid range, and more top end. Also offer this wheel professionally laced into our double wall aluminum rims with 12g spokes. Message us for details. 20″, 24″, 26″, 27.5″, 700c, 28″ & 29″ sizes are available.

Detail:
Motor type: brushless gearless dc motor
Voltage: 48V
Power: 1000W
Max efficiency: 90.5%
RPM: 731
Mechanical brake: Disk or V
Cable location: shaft end , Left side
Cable length:110cm / 43″
Install: spacing of 135mm fork
Noise: < 60 db
Surface: Black painted
Net weight: 6.76 kg / 14.87 lbs
Gross weight: 7.36 kg ( after packing )

Package Content:
1 x Newest version 48V 1000W rear spoke hub motor – #LBM481KRN
Package Size: 25cm L x 25cm W x 25cm H
Package Type: Cardboard Box

Question about 16 inch electric hub motor kit

Posted by on March 20, 2025 No comments

Q:I thank you very much for UPS tracking number. The parcel should be delivered to me these days. Perfect.

Anyhow – I have one question regarding capable Li-Ion-battery pack for “16 inch, 36 V, 250 W front hub motor – electric bike kit, Item No. LBCK1636250F” which you shipped to me.
I have already one Li Ion-Battery pack; 36 V, 504 W, 14 Ah. Is that Li-Ion-Battery pack suitable for using with E-Motor I ordered from you?

A: Just connect your battery to our controller, it works.

Q: You shipped to me in Oct. 2018 “16 inch, 36 V, 250 W front hub motor-electric bike kit, Item No. LBCK1636250F”.
Today first, after buy of kick bike scooter (not pedelec), I install complete kit on my kick bike scooter and it works not. Display works normally (battery indicator full) but it is no E-Motor Watt-indication and no E-Motor reaction after switch on gas-accelerator (speed adjustment not 0 but 1 till 5).
After check of all delivered Parts from your Company and received Datasheet, I discovered some discrepancies:

1. Which voltage has E-Hub Motor, 36 V or 24 V ? (See attachment Page 2/6 and Page 3/6 as well as Page 4/6 with Photo1)
Remark: Delivered E-Motor has no technical dates described on the motor alone.
2. “Cruise button (red/green as shown on the Page 4/6 its other one; See Photo 2)
3. Delivered controller has another dimension as shown on page 4/6; See Photo 3)
4. Which are correct installations codes to be installed for P1 till P5 and C1 till C14?

Awaiting your response asap of the above questions and your statement above delivered kit. Thanks in advance.

A: controller works with 36v battery (min 30v to max 42v)

Please check if there is “-O-“ on the middle/ top of screen.. If have, the system is braking… please disconnect brake lever’s plug or make brake lever’s ring be back. Then motor works.

Please check the blue wire of three button switch if cut off. If cut off blue wire, that’s okay.. If no blue wire cut off, must push the yellow button the other side, motor works. (The yellow button on your picture that works backward status. This motor Not support backward status. So not work)

Three-phase asynchronous hub motor controller start-up

Posted by on March 20, 2025 No comments

Three-phase asynchronous hub motor controller start-up
(1) direct start
Start-slip rate of 1, induced electromotive force in a large rotor, the rotor currents are also high. When hub motor controller starts at rated voltage, known as the direct start, direct start of the current is about 5-7 times the rated current. In general, the rated capacity of 7.5kw to small asynchronous hub motor controller can be directly started.
Starting control circuit used direct electrical appliances including combination switch, button, contactor relays, thermal relays and fuses. To master their individual characteristics, control of both the fuse fuse rated current calculations.
Direct-start control circuit: control of its control principle.
(2) squirrel cage induction hub motor controller for reduced voltage starting.
Master star – start angle and step-down autotransformer starter works
(3) wound three-phase asynchronous hub motor controller start-up
General understanding.

20 inch front wheel hub motor for cargo bike

Posted by on March 15, 2025 No comments

Q:I am interested to learn more about the 20 inch 48V 1000W electric bike kit – front casted hub motor wheel
Item ID #LBCK20481000FM
Main Features:
Hub: Aluminum casted ( tire: 20 × 21/4 or 21/2″ )
Engine: Bldc hub motor
Voltage: 48V
Power: 1000W
Efficiency: 905%
Max speed: 707 kmh — 433mph Default (Optional other speed: 35mph or 25mph,15mph)
Mechanical brake: Disk or V
Cable location: shaft end , LEFT
Cable length:160cm / 63″
Install: spacing of 100mm 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 ± 05 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 * I am looking to replace the rear wheel hub motor on my cargo bike (see picture) was on the bike when I bought it. I have trouble keeping the wheel true and recently have a lot of broken spokes and a cracked rim. It is also hard to pedal because of motor drag and I want to be able to ride it without the power on or if the battery went flat. I can’t do that now. I am interested to know a few things 1. What is the weight of the front wheel hub motor? 2. You can see my bike has the front wheel a much further distance from the handlebars.Can you supply this hub motor kit with longer wires - or extension wires with appropriate connectors - so the wires can be routed under the cargo area and up to handlebars? 3. Is the voltage programmable with your system? (My existing motor can be)(I have a big battery pack) 4. I have hydraulic disc brakes on my bike and want to be sure this is compatible with disc rotors A: 1. The net weight of this motor is 7.25kg 2. Yes. When you order on our site,just leave message: cable length, then we can make. 3. The voltage isn’t programmable. This 48v controller works with 48v or 52v battery. (from min 40v to max 60v) 4. There are six screw on left cover for install disk. The dia. is 44mm (between two screw holes)

leaf bike 26 inch 48V 1500W rear hub motor wheel kit

Posted by on March 15, 2025 No comments

Q: I am interested to buy a complete Rear 1500w hub motor wheel ( the latest model with upgraded phase wires, 0.35mm lamination etc).
The model model I think is LBM26481500RN and I would like to know the following before if buy:
– the no load rpm for 4T, 5T and 6T motor at 48v
– and the top speeds under load for 26 inch wheel.
I am looking to have a maximum 55 – 60kph (not less than 55 ) top speed under load but a bit more torque for off road riding.
Also for a electric bike motor with disc brake mount, cassette, temperature sensor and a rim that fits a 2.5 tire is the same price?

A: If not load, 4T 1500w 26 inch hub motor is about 72kmh (work at 48v)
If not load, 26 inch 1500w 5T is about 60kmh (work at 48v)
We can make cassette case motor with 2mm phase wire. But we still recommend standard version with thread screw with 2.5mm phase wire.
Also,standard version is easy to install than cassette case..
* With disc brake mount, cassette,temp,rim fit for 2.5 tire – The same price.
We recommend: with disc brake, standard version (No cassette version),temp,rim fit for 2.5 tire.

Q: can you please send me a more precise data (numbers) about the rpm @ 48V for each available wingdings available, like a performance table or similar?
I found on internet different available information for this motor, but their are not consistent, there are also the forums..and each data is different.
I was hopping that you can provide me more figures..
And also,I don’t understand why for the cassette hub the phase wires are 2mm while there are existing on the opposite side ?

A:Thank you so much for the clear explanations, I understood very well now what are the draw backs for each design.
Also, I was looking over the performance datasheet and I suppose that those parameters are for the 4 turn winding I suppose right?
So for the 5T the maximum rpm with be lower and torque a bit higher. Also the max efficiency point will be at a lower rpm.
Good, so if I want to place an order for a 5T 1500W 26 inch Rear hub motor kit wheel with the following requirements:
disc mount
threaded sprocket
temp sensor
135 mm drop out
26 inch Rim for 2.5 tire (23-25 mm wide rim)
12 gauge spokes

A: Yes. That 4 turn winding.
If 5T, the max rpm with be lower and torque a bit higher.
26 inch wheel, we recommend 5T
Standard rear 1500w 5T with the following requirements
* can install disk the left side of motor
* can install threaded sprocket on the right side of motor
* with temp
* fit for 135mm dropout
* We have 26 inch out.size 25mm or out.size 32mm wide rim (Our 32mm rim is fit for 26 inch)
Please click below sites.
I think 26 inch all black color rim is fit for your 2.5 tire.

hub motor controller working principle

Posted by on March 15, 2025 No comments

hub motor  controller electronic reversing device, instead of the traditional mechanical commutation device (commutator and brush), not only retained the DC motor speed control with good starting characteristics, and AC motor with simple structure and easy maintenance This motor in good, reliable, therefore, the rapid development in recent years. Traditional DC motor armature is rotated, the pole is stationary, but bldc motor driver in this contrast, the magnetic pole is rotated, the armature is stationary, the armature winding current commutation can make use of position sensors and electronic switching circuit to complete. Brushless motor. hub motor driver generally motors, position sensors, and electronic switch consists of three parts. Motor itself consists of multi-phase (three phase, four-phase, five-phase range) armature windings on the stator pole and a certain number of permanent magnet rotor component. AA, BB, CC, said three-phase motor stator windings, NS is a permanent magnet, the motor rotor, PS is the rotor position sensor, and its coaxial rotor and motor rotor is connected, BG1, BG2, BG3 electronic switching circuits power switch, three-phase windings A, B, C respectively, BG1, BG2, BG3 in series to the power supply after. Its operation principle is that a signal controlled by the PS BG1, BG2, BG3 and other switch on on and off, when the switch turns on, the corresponding stator windings, there is current and magnetic field through the magnetic field and permanent magnetic interaction between the rotor pole will generate torque, the motor rotor, the motor coaxial with the rotor position sensor is connected, it also followed the rotation of the rotor and in turn to BG1, BG2, BG3 signal to control the turn on and off, to the armature winding current with the rotor position changes according to the order of commutation, the magnetic armature rotary stepper motor’s rotor to rotate continuously go on.