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Magnetic Material for Motor Drive Systems pp 85–104Cite as

Magnetic Property and Measurement Excited by PWM Inverter

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Abstract

A motor drive system is used as a means of transportation such as electric cars, and an electrical steel sheet used as a core of the motor is excited by an inverter for variable velocity operation. Because the electrical steel sheet is usually evaluated under an excitation of a linear amplifier which does not include time-harmonic components, it has a different magnetic property from the one which is excited by the inverter. So, the magnetic property of the electrical steel excited by the inverter is shown in detail. In the inverter excitation, magnetic characteristics of ring core have a lot of minor loops as closed loop and open loop caused by carrier frequency of the inverter and the ON voltage of the power semiconductors. So, the iron loss increases due to the inverter excitation. When the power semiconductor with small ON voltage is used as a switching device in the inverter, the minor loops become small and the iron loss decreases. Higher sampling frequency for AD converter is required to express the pulse-shape voltage of the inverter. The required magnetic characteristics in inverter excitation depend on how to use the magnetic material on the inverter.

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Authors and Affiliations

  1. Toyota Technological Institute, Nagoya, Japan

    Keisuke Fujisaki

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  1. Keisuke Fujisaki
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Correspondence to Keisuke Fujisaki .

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Editors and Affiliations

  1. Department of Engineering, Toyota Technological Institute, Nagoya, Japan

    Keisuke Fujisaki

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Fujisaki, K. (2019). Magnetic Property and Measurement Excited by PWM Inverter. In: Fujisaki, K. (eds) Magnetic Material for Motor Drive Systems. Engineering Materials. Springer, Singapore. https://doi.org/10.1007/978-981-32-9906-1_7

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