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Journal of Zhejiang University SCIENCE A 2005 Vol.6 No.2 P.83-89

http://doi.org/10.1631/jzus.2005.A0083


Influence of DSP controller on performance of a permanent magnet brushless AC drive in flux-weakening mode


Author(s):  Z.Q. Zhu, Y.F. Shi, D. Howe

Affiliation(s):  . Department of Electronic & Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK

Corresponding email(s):   Z.Q.Zhu@sheffield.ac.uk

Key Words:  Brushless drive, DSP, Electrical machine, Flux-weakening, Oscillation, Quantisation


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[J]. Journal of Zhejiang University Science A, 2005, 6(2): 83-89.

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author="ZHU Z.Q., SHI Y.F., HOWE D.",
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DOI - 10.1631/jzus.2005.A0083


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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

References

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[2] Morimoto, S., Sanada, M., Takeda, Y., 1996. Inverter-driven Synchronous Motors for Constant Power. , IEEE Industry Application Magazine, 18-24. :18-24. 

[3] Proakis, J.G., Manolakis, D.G., 1996. Digital Signal Processing: Principles, Algorithms, and Applications, 3rd Ed, Prentice-Hall,:

[4] Shi, Y.F., Zhu, Z.Q., Chen, Y.S., 2002. Influence of Winding Resistance on Flux-weakening Performance of A Permanent Magnet Brushless AC Drive. , Proc. Int. Conf. Power Electronics, Machines and Drives, IEE, 392-397. :392-397. 

[5] Sudhoff, S.D., Corzine, K.A., Hegner, H.J., 1995. A flux-weakening strategy for current-regulated surface-mounted permanent-magnet machine drives. IEEE Trans on Energy Conversion, 10(3):431-437. 

[6] Instruments, T.e.x.a.s., 1999. TMS320F/24x DSP Controllers CPU and Instruction Set Reference Guide. , (Rev. C),:

[7] Wong, P.W., 1990. Quantization noise, fixed-point multiplicative roundoff noise, and dithering. IEEE Trans on Signal Processing, 38(2):286-300. 


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