7.2　Electrical Drive

7.2.1　Electrical drive system should operate completely with AC drives and the motor requiring speed regulation should be powered by fully digital AC VVVF unit.

7.2.2　The VVVF motors of production line should be powered by the mode of"common rectifier+inverter".

7.2.3　For drive system of pumps and fans，etc，AC VVVF system should be used.