... controller,inverter,variable frequency drive,Energy saver,ac motor control system,ac frequency drive,vfd,vsd,frequency converter. Application ... ).Internal PID function, realize high performance closed loop control.12).PID regulate DC braking.13).Speed pursue ... synchronous motor of permanent magnetism control.20) Control mode: Vector control with PG (VC), sensorless vector control (SVC), V/F control21) ...