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International Conference on Mechanical and Electrical Technology 2009 (ICMET 2009)

Wenzheng Li
Wenzheng Li
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This paper presents the comparison of iron losses and acoustic noise with 1-phase bipolar PWM inverter Delta-modulated (DM) and SPWM techniques. In the experiment, we use 0.5 mm-thick non-oriented magnetic steel and determine equal maximum fundamental magnetic density on each test procedure, with 0.3, 0.6, 0.9 modulation index and 1, 3, 5 kHz inverter switching frequencies. The iron losses supplied by Delta-modulated technique are very close to those of SPWM technique. But the magnitude of maximum acoustic noise of Delta-modulated technique is lower than that of SPWM technique. Finally, It is useful for designing standard inverter for low power losses.

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