How to realize constant power or constant torque output of three-phase AC motor?
Is generally achieved through the frequency converter in the frequency power supply 50HZ, with inverter motor, the inverter output is below 50HZ, the motor is in constant torque output, but the inverter output is higher than 50HZ, the motor is of constant power output
Compared with the single-phase asynchronous motor, the three-phase asynchronous motor has good performance and saves various materials. According to the structure of the rotor, the three-phase asynchronous motor can be divided into two kinds of cage and winding. The squirrel cage rotor asynchronous motor is widely used because of its simple structure, reliable operation, light weight and cheap price. Its main disadvantage is the difficulty of speed regulation. Winding three-phase asynchronous motor rotor and stator is also provided with three-phase winding, and through the slip ring, brush and external rheostat connection. Adjusting rheostat resistance can improve the starting performance of motor and adjust the speed of motor.
Three phase asynchronous motor for motor operation. Three phase asynchronous motor rotor speed below the speed of a rotating magnetic field, the rotor winding magnetic field between the relative motion and the induced electromotive force and current, and electromagnetic torque and magnetic field interaction, realize the energy transformation.
Is generally achieved through the frequency converter in the frequency power supply 50HZ, with inverter motor, the inverter output is below 50HZ, the motor is in constant torque output, but the inverter output is higher than 50HZ, the motor is of constant power output.
