Induction motor performance as a function of phase number

An analytical and experimental comparison of the performance of multiphase induction machines as a function of the number of phases is provided. The method of generalised complex harmonic analysis is used to model the multiphase machine, including the calculation of pulsating torques. This general model is validated with experimental results. The test machine used a standard motor frame, which had been modified to bring every coil out to a patch panel. With 12 coils per pole, the machine was tested in 3, 4, 6 and 12-phase operation. Results show moderate reductions in stator losses and significant improvements in pulsating torques

[1]  Thomas M. Jahns,et al.  Improved Reliability in Solid-State AC Drives by Means of Multiple Independent Phase Drive Units , 1980, IEEE Transactions on Industry Applications.

[2]  D. White,et al.  Electromechanical energy conversion , 1959 .

[3]  E. Laithwaite,et al.  Generalised harmonic analysis for the steady-state performance of sinusoidally-excited cage induction motors , 1985 .

[4]  Thomas A. Lipo,et al.  Analysis of a concentrated winding induction machine for adjustable speed drive applications. II. Motor design and performance , 1991 .

[5]  S. Williamson.  Power-factor improvement in cage-rotor induction motors , 1983 .

[6]  Y. Zhao,et al.  Modeling and control of a multi-phase induction machine with structural unbalance , 1996 .

[7]  S. Williamson,et al.  Pulsating torque and losses in multiphase induction machines , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[8]  A. Tenconi,et al.  Digital field oriented control for dual three-phase induction motor drives , 2002 .

[9]  Hamid A. Toliyat,et al.  Analysis and simulation of five-phase variable-speed induction motor drives under asymmetrical connections , 1998 .

[10]  Thomas M. Jahns,et al.  Six-Phase Voltage Source Inverter Driven Induction Motor , 1984, IEEE Transactions on Industry Applications.

[11]  A. F. Puchstein,et al.  Alternating-current machines , 1942 .

[12]  Patrick R. Palmer,et al.  The measurement of transient electromagnetic torque in high-performance electrical drives , 1996 .

[13]  T.A. Lipo,et al.  Torque density improvement in a six-phase induction motor with third harmonic current injection , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[14]  Girish Kumar Singh,et al.  Multi-phase induction machine drive research—a survey , 2002 .

[15]  Thomas A. Lipo,et al.  Analysis of a concentrated winding induction machine for adjustable speed drive applications. I. Motor analysis , 1991 .

[16]  E. A. Klingshirn,et al.  High Phase Order Induction Motors - Part I. Description and Theoretical Considerations , 1983, IEEE Power Engineering Review.