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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue ( 2): 2-    DOI: 10.1631/jzus.2005.A0083
    
Influence of DSP controller on performance of a permanent magnet brushless AC drive in flux-weakening mode
ZHU Z.Q., SHI Y.F., HOWE D.
Department of Electronic & Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
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Abstract  The flux-weakening performance of a permanent magnet brushless AC drive was investigated using both floating-point and fixed-point DSP controllers. A significant current oscillation was observed when the drive was operated at high-speed in the flux-weakening mode with the fixed-point DSP. The investigation showed that this was due to the on-line compensation of the winding resistance voltage drop and quantisation errors associated with the fixed-point architecture of the DSP. A simple look-up table scheme is proposed to eliminate the oscillation and to achieve extended flux-weakening capability.

Key words： Electronic & Electrical Engineering Brushless drive      DSP      Electrical machine      Flux-weakening      Oscillation      Quantisation     
Received: 02 August 2004     
CLC:  TN99  
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ZHU Z.Q.
HOWE D.
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ZHU Z.Q., SHI Y.F., HOWE D.. Influence of DSP controller on performance of a permanent magnet brushless AC drive in flux-weakening mode. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 2): 2-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A0083     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I 2/2

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