Slip frequency control is a direct torque control mode, which is based on U/f controlasynchronous motorThe output frequency of the inverter can be adjusted according to the desired torque to make the motor have the corresponding output torque.In this control mode, speed sensors are required to be installed in the control system, and sometimes current feedback is added to control the frequency and current. Therefore, this is a closed-loop control mode, which can make the inverter have good stability, and have good response characteristics to rapid acceleration and deceleration and load changes.[1]
Chinese name
Slip frequency control
Origin
Control Devices and Instruments
Stator winding inputThree phase alternating currentIt generates a rotating magnetic field, which cuts the rotor conductor and generates an induced electromotive force. The induced electromotive force generates a current in the conductor. The interaction between the rotor current and the stator magnetic field generates an electromagnetic force, which drives the rotor to rotate in the same direction as the rotating magnetic field of the stator.Without the influence of external force, the speed of rotor rotation is lower than that of stator magnetic field rotation.The ratio of the difference between the rotating speed of the stator magnetic field and the rotating speed of the rotor and the rotating speed of the stator magnetic field is the slip rate.
