Voltage: single phase 220V or 3phase 380V ( 15%). Power from 0.75KW to 415KW. Input frequency: 50 Hz or 60 Hz. Output frequency: 0400Hz. Carrier frequency: 1 K-15 KHz. Output frequency resolution can reach 0.01 Hz. Good overload capacity which can reach 150% for 1 min, and 180% for 0.2 sec Automatic compensate output torque when output frequency is low. Automatic regulate output voltage when supply voltage changes in range. Automatic energy-saving function which can automatic calculation the optimal output voltage according to the load to save energy communication protocol and Modbus protocol, and it is easier for user to build up centralized control system High reliability with the motor control IC+IGBT at the core PID controller which is used in close loop control systems Simple PLC which can achieve multi-speed, quasi winding and unwinding function, wobble, etc High startup torque which can reach 150%while 1Hz.