On-load Back-EMF Optimization Based on the Back-EMF MST Method and Parametric Optimization

L. H. R. Jesus, G. T. Paula, L. C. Brito

Abstract


This paper proposes an optimal design for a surface mounted permanent magnet synchronous machine (SM-PMSM) based on parametric optimization process in order to reduce the on-load Back-EMF distortions due to the increasement of the electromagnetic load and saturation. Differently from the conventional methods presented in the literature, the optimization approach proposed in this paper accounts for the saturation, air-gap flux density distribution and the on-load Back-EMF assessment by means of finite element analysis along with the most recent method to evaluate the on-load Back-EMF that is known as Back-EMF MST. Furthermore, the optimization process is carried out considering either the physical machine symmetry (based on pole numbers) and a non-evident machine symmetry (based on saturation effects and on the relevance of each tooth on the Back-EMF waveform) that is found thanks to the Back-EMF MST Method. The proposed optimization process also analysis different set of variables based on symmetrical and asymmetrical tooth dimensions. As a result, a reasonably better designed machine is obtained with higher average torque, lower torque ripple and lower volume. In addition, the on-load Back-EMF is almost identical to the no-load one and consequently, the on-load cogging torque is almost identical to the no-load cogging torque.


Keywords


Back-Electromotive Force (Back-EMF), Evolution Strategy, Frozen Permeability, Parametric Optimization, Permanent Magnet Synchronous Machine.

Full Text:

PDF

References


D. Miyagi, S. Nakazaki, and N. Takahashi, "Optimization of Electromagnetic and Magnetic Shielding Using ON/OFF Method,`` IEEE Trans. Magn., vol. 46, August 2010.

D. Miyagi, S. Shimose, N. Takahashi, and T. Yamada, "Optimization of Rotor of Actual IPM Motor Using ON/OFF Method,`` IEEE Trans. Magn., vol. 47, May 2011.

J. B. Kim, K. Y. Hwang, and B. I. Kwon, "Optimization of Two-Phase In-Wheel IPMSM for Wide Speed Range by Using the Kriging Model Based on Latin Hypercube Sampling,`` IEEE Trans. Magn., vol. 47, May 2011.

Y. Duan and D. M. Ionel, "A Review of Recent Developments in Electrical Machine Design Optimization Methods with a Permanent-Magnet Synchronous Motor Benchmark Study,`` IEEE Trans. Ind. Appl., vol. 49, May-June 2013.

K. Yamazaki and H. Ishigami, "Rotor-Shape Optimization of Interior-Permanent-Magnet Motors to Reduce Harmonic Iron Losses,`` IEEE Trans. Ind. Electron., vol. 57, January 2010.

H. C. Liu, I. G. Kim, Y. J. Oh, J. Lee, and S. C. Go, "Design of Permanent Magnet-Assisted Synchronous Reluctance Motor for Maximized Back-EMF and Torque Ripple Reduction,`` IEEE Trans. Magn., vol. 53, June 2017.

P. Ponomarev, I. Petrov, N. Bianchi, and J. Pyrhönen, "Selection of Geometric Design Variables for Fine Numerical Optimizations of Electrical Machines,`` IEEE Trans. Magn., vol. 51, December 2015.

T. Sato, K. Watanabe, and H. Igarashi, "Multimaterial Topology Optimization of Electric Machines Based on Normalized Gaussian Network,`` IEEE Trans. Magn., vol. 51, March 2015.

W. Zhao, T. A. Lipo, and B. I. Kwon, "Optimal Design of a Novel Asymmetrical Rotor Structure to Obtain Torque and Efficiency Improvement in Surface Inset PM Motors,`` IEEE Trans. Magn., vol. 51, March 2015.

W. Zhao, F. Zhao, T. A. Lipo, and B. I. Kwon, "Optimal Design of a Novel V-Type Interior Permanent Magnet Motor with Assisted Barriers for the Improvement of Torque Characteristics,`` IEEE Trans. Magn., vol. 50, November 2014.

Z. Aza, Z. Q. Zhu, and G. Ombach, "Torque-Speed Performance Analysis of Fractional Slot PM Machines Having Concentrated Windings Using Alternate Methods,`` in Proc. 6th IET Int. Conf. Power Electron. Mach. Drives (PEMD),

Mar. 2012, p. B73.

N. Bianchi and S. Bolognani, "Magnetic Models of Saturated Interior Permanent Magnet Motors Based on Finite Element Analysis,`` Conf. Rec. 1998 IEEE Ind. Appl. Conf. Thirty-Third IAS Annu. Meet., vol. 1, p. 27-34, 1998.

G. T. Paula, J. R. B. A. Monteiro, B. P. Alvarenga, T. E. P. Almeida, W. C. A. Pereira, and M. P. Santana, "On-Load Back EMF of PMSM Using Maxwell Stress Tensor,`` IEEE Trans. Magn., vol. 54, July 2018.16

G. T. Paula, Assessment of Surface Mounted Magnet Synchronous Machine's On-Load Back-EMF, Ph.D. thesis, Univ. São Paulo, São Carlos, 2016.

L. H. R. Jesus and L. C. Brito, "Interactive Evolution Strategies for Minimizing Single-Objective Functions,`` IEEE Latin America Trans., vol. 15, May 2017.

I. Rechenberg, Cybernetic solution path of an experimental problem, Royal Aircraft Establishment, United Kingdom, 1965.

H. P. Schwefel, Numerical Optimization of Computer Models, John Wiley & Sons, United Kingdom, 1981.

C. Magele, Evolution Strategies and Optimization, IGTE Graz University of Technology, Austria, 2001.

T. Bäck and H. P. Schwefel, "An overview of evolutionary algorithms for parameter optimization,`` Evolutionary computation, pp. 1-23, 1993.

T. Bäck and H. P. Schwefel, "Evolutionary computation: An overview,`` IEEE International Conference on Evolutionary computation, pp. 20-29, 1996.




DOI: http://dx.doi.org/10.1590/2179-10742019v18i31511

Refbacks

  • There are currently no refbacks.


© Copyright 2007-2016 JMOe Brazilian Microwave and Optoelectronics Society (SBMO) and Brazilian Society of Electromagnetism (SBMag)