Category Archives: Uncategorized

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.

14 inch electric hub motor for e-scooter

36V 750W / 48V 1000W 14 inch 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. Hub Motor speed,we can customize according as your actually need.
It’s used for electric bike,electric scooter,tricycle.

More info about this hub motor
1.The drawings of HBL-14″ rear hub motor,it’s fit for standard 135mm rear fork.
Net weight:6.86kgs

2.The drawings of HBL-14″ front hub motor,it’s fit for standard 100mm front fork.
Net weight:6.58kgs

bldc motor starting frequency

bldc motor starting frequency is not too high, it is just starting because bldc motor speed is zero, the starting process, the load torque in addition to overcoming the resistance torque, but also to overcome the inertia of the rotating part of masking, so when the motor starter than in the burden of continuous operation as the most important.

If the starting pulse frequency is too high, the rotor speed to keep up with the speed of the stator rotating magnetic field, so the first step over the position far behind the equilibrium position, the subsequent step in the rotor speed increased marginally, while the stator magnetic field still pulse frequency proportional to the speed of forward rotation, the equilibrium position of the rotor and increasing the distance between the final position for the rotor dynamic stability region fell outside the emergence of-step or oscillation, and therefore the motor can not start.

In order to properly start, starting frequency is not too high, when the motor starts and then gradually increased frequency.

bldc motor winding open circuit causes and treatment

bldc motor winding open circuit the motor does not start, three-phase current imbalance, abnormal noise or vibration, temperature exceed the allowable value or smoke.

Winding open circuit due to poor welding or the use of corrosive fluxes, welding and then not cleaned, it may cause solder pot or loose; by mechanical stress or collision coil short-circuit, short circuit and ground fault also can lead burning, and burning in of a few wires in a short circuit or a few wires, the other a few wires as current as temperature rises, causing fever and winding circuit. Generally divided into disconnected end of one phase winding, inter-turn short circuit, parallel circuit branch office, multi-wire and burned in an open circuit, broken rotor cage.

hub motor short circuit causes:
1, when in the repair and maintenance problems touched off or manufacturing quality.
2, the winding of the components, pole (phase) winding and the lead group and the first welding wire and other wire bad, long-running hot sealing off.
3, by mechanical force and electromagnetic force or pull off the winding damage.
4, short circuit and the ground turns white sometimes cause severe burning or winding fuse and so on.

hub motor short-circuit approach:
1, open circuit at the end, the connection is completed weld, wrapped in insulating material, put pipe insulation, banding is good, and then dried.
2, as inter-turn winding, white short-circuit and ground and other reasons caused serious burnt windings should generally be replaced with new winding.
3, the open circuit point in the tank, is a small break to do emergency treatment, the use of groups out method to identify breakpoints and the Ministry of winding down its connected and insulated qualified to use. If your business is a buy and sell or something, you might need motors can be risky and dangerous.
4, the cage can be broken rotor cage welding, cold-connection of a repair or exchange.

bike motor speed control method

bike motor variable speed control method of pole pairs is used to change the wiring to the stator windings to change the cage motor stator pole pairs to achieve speed control purposes, the following features:

1, with a hard mechanical properties, good stability;

2, non-slip loss, high efficiency;

3, the wiring is simple, easy to control, low prices;

4, class speed, a larger differential, can not get smooth speed control;

5, with speed regulator, used in conjunction with electromagnetic slip clutch, to obtain a higher efficiency of smooth speed control characteristics.

This does not require stepless speed control method for the production of machinery, such as metal cutting machine tools, lifts, lifting equipment, fans and pumps.

Why hub motor out of step?

1, hub motor rotor of the stepper motor acceleration is slower than the rotating magnetic field, that is lower than the phase velocity change arising. This is because the lack of input electrical power, generated in the stepper motor torque can not make synchronous rotor speed to follow the stator magnetic field rotation rate, causing loss of step. And any high frequency than when the frequency is bound to work out of step. This illustrates the step-step motor drag is not enough. Once the reduced load, or increase the winding excitation current, it is possible to overcome the loss of step.

2, hub motor rotor speed is higher than the average of the average rotation speed of the stator magnetic field. Then the stator excitation power for longer periods, than the time required for the rotor step further, the rotor step process to get too much energy, resulting in pediment and the backlash of the swing oscillations. When severe enough to cause oscillation of step.

Requirements for practical application of bldc motor?

1, bldc motor under the control of the electric pulse can quickly start, rotating, and stopped and in a wide range of the speed control;

2, high precision, which requires a small amount of displacement corresponding to the pulse and to accurately and uniformly. This requires bldc motor small step, step, high precision, not losing steps or overshoot;

3, the action fast. That not only start, stop, fast reverse, and continuous high-speed operation in order to improve labor productivity;

4, the output torque can be directly driven load.

Basics of an Electric Hub Motor

There are two main types of electric bike motors, each with their own set of features and functions.

The hub motor:
• The motor is compact in size to fit into the wheel.
• Most hub motors provide great efficiency with relatively low noise.
• Many of the leading companies offer custom-made hub electric bike motors to fit the needs of the consumer.
• Initially, you have to set up the built-in programmer.
• The best models offer cruise control.
• The weight can range from 5-15kg, which is a lot.
• The power ranges from 250-1000 Watts depending on the hub motor regulations for the area.
• The price ranges from a $100 to as much as $500.
• It is extremely energy efficient with minimum loss of energy and the total cost of maintenance is surprisingly low.
• Generally, you have to modify the wheel to make room for the electric bike motor.

The brushless motor:
• The electric bike motor has electronic functioning.
• It is environmentally safe.
• The motor works with a DC current.
• Generally, a brushless motor has an integrated gearbox, which significantly increases the amount of motor torque.
• High speed cruising with this motor is a highly enjoyable experience.

If you intend on buying an e bike kit then it will come with one of these motors and probably a choice between wide ranges of power. E bike kits are easier to install for a first time user and a person with limited knowledge of machinery. However, if you want to construct an entire electric bike from scratch, then you should pay special attention to the electric bike motor specifications to select the kind that would fit your lifestyle.

Whether you are interested in purchasing an ebike or you’re looking into starting from scratch in order to create your very own customized electric bicycle, you will definitely need to know the basics of the electric bike motor.

BLDC motor controller basic principles

bldc motor controller is the leading voltage AC motor running, widely used in electric fans, refrigerators, washing machines, air conditioners, hair dryer, vacuum cleaner, range hood, dishwasher, electric sewing machines (to be found food processing machines and other household appliances and various electric tools, small electromechanical devices.

bldc motor driver is divided into induction motors and AC commutator motor. Divided into single-phase induction motor asynchronous motor, AC and DC motors and repulsion motor.

bldc motor driver basic principles:

(1) When access to three-phase AC induction motor three-phase power, three-phase stator windings generate current flow through the three-phase symmetrical three-phase magnetomotive force (the stator rotating magnetic momentum) and produce a rotating magnetic field.

(2) The conductor of the rotating magnetic field and the rotor has a relatively cutting exercise, according to the principle of electromagnetic induction, EMF and rotor conductors induced current.

(3) According to the law of the electromagnetic force, the current-carrying conductor in a magnetic field in the rotor by the electromagnetic force, the formation of the electromagnetic torque, driving the rotor rotation when the motor shaft with a mechanical load, then out the output mechanical energy.

Bike Conversion kit with dual motor

Bike Conversion kit with dual motor

SkyHawk brand GAS in China: Dual Motors: 2×2 36V and 48V Billy Hill model.

 # 1. 2×2 Drive Billy of the Hill: bent 36V 350 watts. Engine Kit 26 “:

# 2. Drive 2×2 Hill Billy: 48V 450 watt bend. Engine Kit 26 “:

  Our motto: Save money: Get Energy: Why buy one complete E-bike motor of the mountain when you have a mountain bike and may already have 2×2 drive power?

 Complete kit to convert the “26 standard on electric bike conversion kit with Dual PMGR engines in front and rear wheels. Battery Charger Included: Just redesigned controller manages the engine in single mode or bending mode 2×2 drive. Gas of China offers the only doubles kit drive in China. A technology first!

 The bike frame is not included, for the purpose of illustration only. Shown with option package cell lithium battery in the lock box and aluminum loading. Regulator mounting at the bottom of the carrier rack.

 allows selective drive 2×2 rear wheel drive, or drive or both of the front wheel at the same time to steep hills.

 You can use lead acid batteries sealed gel cell. Or NiMh pack of lithium ion cell. Carrier upper lock and battery charging. The kit provided fewer batteries. Batteries ordered separately option.

 Engine option DD of the old style or new brushless motor super quiet PMGR style with planetary gears for increased torque. Choice of front-wheel drive or rear wheel drive suitable for bikes with multiple speeds.

 Adjustments 26 “mountain bikes roll as shown in picture. 2 engines in 2 pre-installed inside edges of the wheel tire HD 2195. A controller handles both engines simultaneously, a gas of China first.

 Needs only about 1.1 hours to install on a mountain bike oil dispenser.