Implementation and Control of Six-Phase Induction Motor Driven by a Three-Phase Supply

Mohamed I. Abdelwanis, Essam M. Rashad, Ibrahim B. M. Taha and Fathalla F. Selim
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Mohamed I. Abdelwanis: Electrical Engineering Department, Faculty of Engineering, Kafrelsheikh University, P.O. Box 33516, Kafr El Sheikh 33516, Egypt
Essam M. Rashad: Electrical Engineering Department, Faculty of Engineering, Tanta University, P.O. Box 31111, Tanta 31527, Egypt
Ibrahim B. M. Taha: Department of Electrical Engineering, College of Engineering, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Fathalla F. Selim: Electrical Engineering Department, Faculty of Engineering, Kafrelsheikh University, P.O. Box 33516, Kafr El Sheikh 33516, Egypt

Energies, 2021, vol. 14, issue 22, 1-16

Abstract: This paper is interested in implementing and controlling a modified six-phase induction motor (MSPIM) when fed from a three-phase supply either via an inverter or with a direct grid connection loaded by a centrifugal pump. The main aims of using the MSPIM are to enhance motor reliability and reduce torque pulsation. A three-to-six phase transformer has been designed, implemented, and employed to enable the SPIM to be driven from a three-phase supply. It is preferable to use the three-to-six phase transformers integrated with three-phase inverter on using the six-phase inverter to generate lower values of harmonics and lower steady-state error of speed and reduce the starting current and because also it isolates the primary circuit from the secondary, and the cost will be lower compared to the design of a special six-phase inverter. Dynamic models of SPIM, three-to-six phase transformer, and three-phase variable speed drive are derived. Then, a scalar (V/F) closed-loop control of SPIM is employed, and the results are discussed. Fine-tuning of PID controllers is used to keep the motor speed tracking the reference value. A low pass filter is connected to reduce the ripple of voltage and current waveforms. An experimental setup has been built and implemented to check the possibility of controlling SPIM by a variable speed drive system fed from a three-to-six phase transformer. It is found that the proposed method can be effectively used to drive the SPIM from a three-phase supply.

Keywords: PWM; six-phase induction motor; harmonic distortion; three-and six-phase transformers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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