Zero/low speed magnet magnetization state estimation using high frequency injection for a fractional slot variable flux-intensifying interior permanent magnet synchronous machine

Chen Yen Yu, Takashi Fukushige, Apoorva Athavale, Brent Gagas, Kan Akatsu, David Reigosa, Robert D. Lorenz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

This paper focuses on zero/low speed magnetization state (MS) estimation using high frequency injection for a fractional slot variable flux-intensifying interior permanent magnet synchronous machine (VTI-IPMSM). For VFI-IPMSMs, the knowledge of the MS is necessary to achieve loss minimizing control, since loss properties vary with MS. The MS can be estimated by measuring EMF, however, voltage sensors are not commonly used in standard drives. If a flux observer is used, accurate estimation is difficult at zero/low speed due to the diminishing EMF signal. To solve this issue, a superimposed high frequency (HF) injection method for MS estimation is proposed. Physically, higher MS implies a higher saturation condition which results in lower differential inductance. With a constant HF voltage injection, lower inductance (higher MS) results in a larger HF current response and vice versa. As a result, by imposing a HF voltage signal, the MS can be estimated through the HF current response. The proposed MS estimation methodology is evaluated experimentally with a fabricated fractional slot VFI-IPMSM and demonstrates effective MS estimation within 5 % error.

Original languageEnglish
Title of host publication2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2495-2502
Number of pages8
ISBN (Print)9781479956982
DOIs
Publication statusPublished - 2014 Nov 11
Event6th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2014 - Pittsburgh, United States
Duration: 2014 Sep 142014 Sep 18

Other

Other6th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2014
CountryUnited States
CityPittsburgh
Period14/9/1414/9/18

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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    Yu, C. Y., Fukushige, T., Athavale, A., Gagas, B., Akatsu, K., Reigosa, D., & Lorenz, R. D. (2014). Zero/low speed magnet magnetization state estimation using high frequency injection for a fractional slot variable flux-intensifying interior permanent magnet synchronous machine. In 2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014 (pp. 2495-2502). [6953733] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2014.6953733