... designed with permanent magnet multi-pole structure which reaches to 20~300 poles.Compared with the same model of induction machine,our ... 380VVoltage allow fluctuation Plus ±15%Frequency 50Hz 60HzSynchronous speed 20,30,40,60,79,115,214r/minTorque range 0.5 ... hole shaft, and through-hole shaft with keywayEnvironmental conditions Temperature-20°C~+50°C,humidity under 85%(no condensation), no corrosive ...