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New optimal Methods for PWM inverter Deadtime Compensation
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| Author(s) |
L. Ben-Brahim |
| Abstract |
To prevent the phase shortage of inverter arms, a time delay is inserted between the switches of the same arm. This lag-time causes serious distortions of the output voltage of the inverter. The lag-time is well know as dead-time effect. Conventional dead-time compensation methods based on current reference polarity, are widely used to improve the output current waveforms. The improved waveforms however still suffer from the zero current crossing phenomenon. This paper analysis the origins of waveform distortions arround the zero current crossing in PWM (Pulse Witdth Modulated) inverters. The conventional compensation methods as well as a three proposed methods to reduce the distortions in the PWM inverters output waveforms caused by dead-time and the zero crossing problem are highlighted. Theoretical analysis as well as simulation results to verify the proposed methods are described in this paper. |
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| Filename: | EPE2001 - PP01150 - Ben-Brahim.pdf |
| Filesize: | 719.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-09 by System |
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