Multiphase Modular Permanent Magnet Drive System Design and Realization

Modular permanent magnet machines are gaining popularity for their ease in assembling the stator pieces and phase windings. In this paper, a multiphase modular permanent magnet machine with a corresponding drive topology is proposed as a high performance drive system. The machine stator modules are fabricated by soft magnetic composite (SMC) material, which benefits large scale machine fabrications by the one punch fabrication process for the modules. Moreover, its isotropic material property can be exploited for various machine structure design compared with the 2D flux distribution of typical iron laminations. By making use of a concentric winding configuration, the stator structure is simplified with the benefit of less end winding loss. With a multiphase design, the system can survive under major fault conditions. A fault tolerant capability for up to two phase open and several switch failure combinations have been validated by an actual five phase motor drive system realization.

[1]  A. Jack.  Experience with using soft magnetic composites for electrical machines , 1998 .

[2]  A.G. Jack,et al.  Permanent magnet machines with powdered iron cores and pre-pressed windings , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[3]  K. Atallah,et al.  Torque-ripple minimization in modular permanent-magnet brushless machines , 2003 .

[4]  B. Mecrow,et al.  Claw pole armature permanent magnet machines exploiting soft iron powder metallurgy , 1997, 1997 IEEE International Electric Machines and Drives Conference Record.

[5]  Barrie Mecrow,et al.  A comparative study of permanent magnet and switched reluctance motors for high-performance fault-tolerant applications , 1995 .

[6]  Y.G. Guo,et al.  Comparative study of 3D flux electrical machines with soft magnetic composite cores , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).