Hysteresis loss component under non-sinusoidal flux waveforms |
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Authors: | J Leicht AJ Moses S Zurek |
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Institution: | 1. Institute for Technological Research of São Paulo, Almeida Prado 532, São Paulo 05508-901, Brazil;2. Wolfson Centre for Magnetics, School of Engineering, Cardiff University, Newport Road, Cardiff CF24 3AA, UK |
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Abstract: | Separation of total energy dissipation per magnetisation cycle into a frequency-dependent dynamic component and a frequency-independent hysteresis component is a common practise in evaluating electromagnetic losses in Si–Fe electrical steel sheet. The assumed frequency-independent hysteresis component is defined by a coefficient C0 (J/kg). In this work, the value of C0 was determined using a linear extrapolation method and quasi-static hysteresis energy loss per cycle. The extrapolation method gave a considerable error when applied to non-sinusoidal excitation voltages (pulse width modulation and square) in a frequency range from 25 to 100 Hz. For this reason the coefficient values obtained from the quasi-static measurements at 0.01 Hz were assumed. |
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Keywords: | 75 50 Bb 75 60 &minus d 75 60 Ej |
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