... Eenergy saving product,frequency inverter,AC drives,variable speed drive,AC motor speed controller,inverter,variable frequency drive,Energy saver,ac ... motor of permanent magnetism control.20) Control mode: Vector control with PG (VC), sensorless vector control (SVC), V/F control21 ... and moisture and avoid being wetted due to raining, with the humidity below 90%RH (not dewing). Typical application ...