Rotor field oriented control strategy with harmonic currents closed-loop control for five-phase induction motor

Abstract

In order to solve the problems of harmonic currents in the conventional vector control of mul tiphase induction motor, the rotor field oriented control (RFOC) strategy with harmonic current closed loop control is proposed in the paper. Based on the transform theory of the multiphase system and the RFOC strat egy of three phase induction motor, the mathematical modulation of RFOC for five phase induction motor is modeled. The fundamental current and the second order harmonic current can be controlled indepen dently after being decoupled. The proposed strategy is implemented with a board microcomputer that uses TMS320F28335 DSP. The experimental results show that the proposed RFOC strategy with harmonic cur rent closed loop control has outstanding dynamic and static performance.