Kohlhepp B, Dürbaum T (2021)
Publication Type: Conference contribution
Publication year: 2021
Publisher: Institute of Electrical and Electronics Engineers Inc.
Conference Proceedings Title: 2021 56th International Universities Power Engineering Conference: Powering Net Zero Emissions, UPEC 2021 - Proceedings
Event location: Virtual, Middlesbrough, GBR
ISBN: 9781665443890
DOI: 10.1109/UPEC50034.2021.9548210
Most inverters driving electrical machines or for grid applications operate under hard switching conditions at fixed frequency. However, the resulting high switching losses from the hard switched operation limit the efficiency. Another approach uses triangular current mode to achieve zero voltage switching of the semiconductors, thus avoiding switching losses. Disadvantageously, this modulation scheme exhibits a huge current ripple especially during the extrema of the sine. To remedy this drawback, this paper studies a discontinuous pulse width modulation scheme by simulation, which avoids switching actions around the sinusoidal maximum and thus, reduces the overall current ripple. In order to be able to use this approach beneficially, the transitions to the intervals with no switching actions should be soft. This attenuates oscillations within the filter and thus provides the intended reduction in rms inductor current. Besides a lower rms current predicted by simulation, also significantly reduced losses of the inductor are to be expected.
APA:
Kohlhepp, B., & Dürbaum, T. (2021). Novel DPWM modulation scheme for three-phase ZVS inverters. In 2021 56th International Universities Power Engineering Conference: Powering Net Zero Emissions, UPEC 2021 - Proceedings. Virtual, Middlesbrough, GBR: Institute of Electrical and Electronics Engineers Inc..
MLA:
Kohlhepp, Benedikt, and Thomas Dürbaum. "Novel DPWM modulation scheme for three-phase ZVS inverters." Proceedings of the 56th International Universities Power Engineering Conference, UPEC 2021, Virtual, Middlesbrough, GBR Institute of Electrical and Electronics Engineers Inc., 2021.
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