Matching problem between frequency converter and constant force motor

Voltage matching: The rated voltage of the frequency converter matches the rated voltage of the motor.

Current matching: For ordinary centrifugal pumps, the rated current of the frequency converter matches the rated current of the motor. For special loads such as deep water pumps, it is necessary to refer to the motor performance parameters to determine the inverter current and overload capacity based on the maximum current. The current setting of the frequency converter should not be less than 1.1 times the rated current of the motor, and the maximum current is generally set to 1.5 times the rated current of the motor.

Torque matching: For constant torque loads such as extruders, mixers, and lifting equipment, firstly, increasing the capacity of the electric motor and frequency converter is often used to improve low-speed torque and avoid the difficulty of low-frequency compensation; Secondly, a high-performance frequency converter or vector frequency converter with torque control function is adopted to achieve constant torque operation in low-speed areas and constant power operation in high-speed areas. For variable torque loads such as fans and pumps, low-speed loads have smaller torque, and ordinary functional frequency converters can adapt.