Torque control during pole-changing transition of a 3:1 pole induction machine

Pole-phase modulation is a method of adjusting the pole- phase ratio of an electrical machine. Based on this method, an induction machine has been developed to operate in either a 12pole-3phase or a 4pole-9phase configuration. A novel control scheme was developed to control the motor during the pole-changing transition allowing continuous torque production. During the transition the motor is controlled as two independent motors, using the same stator windings and iron core. This field orientation control based scheme requires the realization of two sets of independent current commands on the motor's nine stator windings. In addition, the two current sets have to be obtained from motor's measured stator currents. This paper presents a current transformation between two independent orthogonal reference frames and a nine-axes reference frame.

[1]  Yifan Zhao,et al.  Space vector PWM control of dual three phase induction machine using vector space decomposition , 1994 .

[2]  R. H. Park,et al.  Two-reaction theory of synchronous machines generalized method of analysis-part I , 1929, Transactions of the American Institute of Electrical Engineers.

[3]  Elias G. Strangas,et al.  Control of a continuously operated pole-changing induction machine , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..

[4]  H. Auinger.  Universal design method for pole-changing windings of polyphase motors with a minimum number of terminations , 1979 .

[5]  M. Durán,et al.  Multi-Phase Space Vector Pulse Width Modulation: Applications and Strategies. , 2007 .

[6]  J.M. Miller,et al.  Design considerations for an automotive integrated starter-generator with pole-phase modulation , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[7]  Thomas A. Lipo,et al.  Modeling and analysis of a wide speed range induction motor drive based on electronic pole changing , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[8]  B. V. Jayawant,et al.  The development of a new 3:1 pole-changing motor , 1956 .

[9]  Michael Liwschitz-Garik,et al.  Alternating-Current Machines , 1936, Nature.

[10]  F. Profumo,et al.  Digital field oriented control for dual three-phase induction motor drives , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).