... Injection machine, central air conditioning, numerical control machine tool, air-compressor, fan and pump, blower, air conditioner for large buildings; ... 1140V,50/60HAllowable Fluctuation rangevoltage: ±15% frequency: ±5%controlControl systemhigh performance vector control ... frequency range is 10.00~2000.0Hz.control methodV/F control, V/F+ PG control, vector + PG control variable frequency drives for ...