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Reduced Magnet Designs and Position Self-Sensing Control Methods of Flux-Intensifying Permanent Magnet Synchronous Machines
Technical Paper
2012-01-0345
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents advanced and cost-reducing technologies of a motor drive system with reduced permanent magnets but without a position sensor. The key enabler is the integration of novel designs of flux-intensifying interior permanent magnet synchronous machines (FI-IPMSMs) and position self-sensing control technologies. In this paper, we focus on two advantages of FI-IPMSM over conventional flux-weakening interior permanent magnet synchronous machines (FW-IPMSMs). The first benefit is that thinner magnets are possible and there is less concern for demagnetization because of its significantly smaller flux-weakening current. This paper presents two design examples of FI-IPMSMs, one of which has not only smaller magnets but also similar power conversion capability. The second advantage is reduced saturation and cross-saturation effect, which leads to improved position self-sensing capability. However, even in the FI-IPMSM, non-ideal effects of both machine and inverter limit the position estimation accuracy. Therefore, this paper includes experimental evaluation of decoupling methods to improve position estimation accuracy.
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Citation
Tamura, J., Yu, C., Limsuwan, N., and Lorenz, R., "Reduced Magnet Designs and Position Self-Sensing Control Methods of Flux-Intensifying Permanent Magnet Synchronous Machines," SAE Technical Paper 2012-01-0345, 2012, https://doi.org/10.4271/2012-01-0345.Also In
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