Performance of six-phase induction motor with trapezia phase current waveforms
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society
Henan Polytechnic University, Jiaozuo 454000, China; University of Stellenbosch, Stellenbosch 7602, South Africa
To realize the function that the field and torque can be controlled directly, a novel direct field and direct torque control strategy used in six-phase induction motor with special phase current waveform is proposed and evaluated. Firstly, the electromagnetic torque is calculated by theoretical and finite element analysis. Secondly, the analytical results are verified by practical experiment. The dominant merit of the proposed control strategy is that the flux and torque of the induction motor are directly controlled as compared to vector control that uses Park transformation theory. Another merit is that with stator winding layout, a nearly square, smooth rotating flux density in the air gap is generated by using the resultant field currents and the electromagnetic torque can be improved greatly.
Air-gaps; Analytical results; Control strategies; Direct Torque Control; Electromagnetic torque; Electromagnetic torques; Field currents; Finite element analysis; Park transformation; Phase current waveform; Phase currents; Rotating flux; Six-phase; Six-phase motor; Stator winding; Vector controls; Electric windings; Electromagnetism; Induction motors; Motors; Torque; Torque control; Finite element method