... controller,inverter,variable frequency drive,Energy saver,ac motor control system,ac frequency drive,vfd,vsd,frequency converter. Application ... speed and high performance control.5).Integrate V/F control, V/F+PG control, vector + PG control.6).3 space voltage ... synchronous motor of permanent magnetism control.20) Control mode: Vector control with PG (VC), sensorless vector control (SVC), V/F control21) ...