Backstepping and PCH Coordinated Control of Induction Motor Considering Copper Loss

Abstract

Aiming at the problem that large energy loss of signal control strategy in induction motor speed control system, this paper designs a method of coordinated control between backstepping and Hamilton to realize speed control of induction motor. A load observer is designed to estimate the load torque in real time. Considering the electromagnetic subsystem and the mechanical subsystem, the mathematical model of induction motor is established, and the backstepping controller is obtained according to the mathematical model of rotor flux orientation. According to the principle of Hamilton (PCH) control, the Hamilton model of induction motor is established and the PCH controller is obtained. Finally, the speed control of induction motor is realized under the action of Gauss coordinated controller. When the load is unknown and changing, the designed coordinated control strategy is compared with PCH control and backstepping control. The simulation results show that the control strategy has faster starting speed than PCH control and lower energy loss than backstepping control. It has a certain application prospect.