WITTUR Automatic Door System Controlled By Inverter 

WITTUR Automatic Door System Controlled By Inverter Product Description Door System Closer, Wittur Door System, Telescopic Elevator Door, Concealed Sliding Door for Passenger Elevator Motor: 1. AC induction motor can use vector control and VVVF control. If VVVF control adopted, speed sensor would be not necessary. The method of control is simple, meanwhile, same controller can drive several similar motors. 2. Vector control, AC induction motor only needs speed information, angle information are not necessary. Therefore, encoder only adopts increment. Besides, AC induction motor operates without initial position, during application of door system, not necessary to study pole position and absolute encoder. 3. AC induction motor has no demagnetization problem. AC motor stall torque is rather big, can be applied to more door types. Controller: 1. The method of control is simple, same controller can drive several similar motors. 2. It is appli…