Augmented speed control scheme of dual induction motors with mutual flux angle control loop

Abstract

: Thispaperproposesanaugmentedspeedcontrolschemeofdualinductionmotors fed by a five-leg voltage source inverter (VSI) with a common/shared-leg. An additional control loop is proposed here and based on the mutual flux angle – the difference between flux angular positions of the IMs. The main purpose of this research is to minimize the energy losses in the common inverter leg by controlling the mutual flux angle, at equal angular speeds of both motors. Simulation and experimental studies were carried out and the effectiveness of the proposed control method was proven. The PLECS software package wasusedforthesimulationtests.Thelaboratoryprototypewaspreparedfortheexperimental validation. All results were provided and discussed in this paper.