Wei Feng Machinery Co., Ltd. successfully developed non-position sensor brushless DC motor drive system after many years arduous research  by  professors of Zhejiang .. The system has broken the tradition of DC motor technology and more conducive to the development of brushless DC motors. Our motor-driven both for front wheel and back wheel, provides adequate choice space for the clients. The system has many advantages: the testing of internal motor rotor position sensor and the corresponding cable were eliminated, the production costs was reduced a lot, the production process was optimized, and the electrical system reliability and efficiency improved a lot . The use of light materials magnesium alloy for front wheel motor make the motor only 2,400 grams, to create a more compact form motor, suction noise better, more obvious result for absorb quake, particularly prominent cooling; while the motor use material of high-intensity ultra-wearable change Deceleration of the patent system slowdown and improve the efficiency of the motor, increasing the motor torque to achieve more energy saving, environmental protection, the effect of more hardware.

 

   

System parameters

 

1. Wei-feng front high-speed brushless motor main technical parameters:

 

Working  voltage   V           36           24

Motor Wheel diameter  mm    ≤ 126

Rated input voltage  V        36        24

Rated input current  A         6.2      9.9

Rated input power  W              180

Maximum efficiency  %       81       78

Rotor Speed    r / min       160 ~ 340

Weight   kg                            ≤ 2.4

 

 

 

 2. Wei-feng back high-speed brushless motor main technical parameters:

Working  voltage    V              36           24

Motor Wheel diameter  mm        ≤ 138

Rated input voltage   V          36           24

Rated input current   A          6.9        10.4

Rated input power   W               250

Maximum efficiency  %          81          80

Speed              r / min           160 ~ 340

Weight           kg                      ≤ 3.3

3. Wei-feng licensing brushless motor controllers technical parameters (no position sensor / position sensor)

Model specifications             WZK3612      WZK2415

Working Voltage     V                 36                 24

Current limit (set)   A                 12                 15

Rated power          W                       300

Efficiency                %          ≥ 98.5%        ≥ 98%

4. Axis sensor and display

Axis sensor and display adopt the smart microcomputer technology, exactly test the assistant. No need  to changes any original structure. The power system in the state, may at any time of adjustment assistance. Deng foot brake set-speed automatic discharge in the state can be arbitrary speed governor. At the same time the system overall energy-saving environmental protection effort Earthquake waterproof, multi-functional integration, is an ideal choice for customers!

 

5. Data conversion

 

Motor speed conversion tables

Vehicle speed =moto speed (rpm)*wheel diameter (inch)*0.0254*60*10-3

Wei Feng Motor matched by the round tracks, motor speed, speed tables

Bicycle Size and the Moto Speed     Comparison
Wheel Size （inch）	Moto      Speed           （rpm）	Bicycle Speed （km/h）
16"	260	20
18"	230	20
20"	210	20
22"	190	20
24"	175	20
26"	160	20