Trapezoidal wave type three phase

 Y series best cast iron three phase induction motor
Specifications
1. 20 years manufacturing experience
2. 12 months guarantee
3. low noise and temperature rise
4. high starting torque
5. AC Voltage: 220V/380V, 380V/660V,400V/690V,220V/400V

Brushless motor driven wave commutation of the frame. This way has two independent current control loop, to two line circle in real time control of motor. Because the motor is WYE connection, so the third group of coil current and the other two groups of the total current coil of equal size, but in the opposite direction (Newton's laws of current), so we can't separate to control the third group of coil current. Because of three groups of coil current must be combined into a set of stable current motor rotation vector, and the three groups of coil remained at 120 degree Angle, so the three groups of current AC synchronous generator wave form must be a string, and keep the 120 degree phase difference. Position encoder is mainly used to provide two wave signals, and the spacing between 120 degrees. This two way signal overlapping and torque control signal into a signal amplification of wave type to get control of the motor torque. This two current signal through the fan motor phase superposition forming way let the motor rotating current vector. Two motor coil current signal through setting and the string will be input to a pair of P - wave signal I controller. 

electric motor 20hp aluminum body 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Brand Name: FUJIAN DONGFENG MACHINERY ELECTRICAL LIABILITY CO., LTD

Due to the third route coil current is negative superposition of two road, so we don't need to control it. Every road P - I controller output signal will be connected to the PWM modulation, and through the bridge road input to the motor coil. The third line circle circle of control voltage of the other two line voltage of negative overlay, and the control voltage of the three road still keep the phase Angle of 120 degrees. In order to make the actual output current wholesalemotor.blogspot.com waveform accurately in accordance with the current control signal, so after setting of current control vector must be like we need rotation smooth, stable size, and always keep a vertical and rotor magnetic field direction. Wave type commutation can get trapezoidal wave type commutation cannot reach the smooth control of the motor. The small diesel generator ideal way, however, can have very good smooth effect, the motor at low speed movement and for the high speed motion of the motor is not any difference. Because when speed up, the current loop controller must track frequency increasing string wave signal, but also to overcome the increasing amplitude and frequency counter electromotive force of the motor.