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Article

Calculation of Semiconductor Power Losses of a Three-Phase Quasi-Z-Source Inverter

Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, 21000 Split, Croatia
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Electronics 2020, 9(10), 1642; https://doi.org/10.3390/electronics9101642
Received: 14 September 2020 / Revised: 28 September 2020 / Accepted: 30 September 2020 / Published: 6 October 2020
(This article belongs to the Section Power Electronics)
This paper presents two novel algorithms for the calculation of semiconductor losses of a three-phase quasi-Z-source inverter (qZSI). The conduction and switching losses are calculated based on the output current-voltage characteristics and switching characteristics, respectively, which are provided by the semiconductor device manufacturer. The considered inverter has been operated in a stand-alone operation mode, whereby the sinusoidal pulse width modulation (SPWM) with injected 3rd harmonic has been implemented. The proposed algorithms calculate the losses of the insulated gate bipolar transistors (IGBTs) and the free-wheeling diodes in the inverter bridge, as well as the losses of the impedance network diode. The first considered algorithm requires the mean value of the inverter input voltage, the mean value of the impedance network inductor current, the peak value of the phase current, the modulation index, the duty cycle, and the phase angle between the fundamental output phase current and voltage. Its implementation is feasible only for the Z-source-related topologies with the SPWM. The second considered algorithm requires the instantaneous values of the inverter input voltage, the impedance network diode current, the impedance network inductor current, the phase current, and the duty cycle. However, it does not impose any limitations regarding the inverter topology or switching modulation strategy. The semiconductor losses calculated by the proposed algorithms were compared with the experimentally determined losses. Based on the comparison, the correction factor for the IGBT switching energies was determined so the errors of both the algorithms were reduced to less than 12%. View Full-Text
Keywords: loss-calculation algorithm; power inverter losses; quasi-Z-source inverter; semiconductor losses loss-calculation algorithm; power inverter losses; quasi-Z-source inverter; semiconductor losses
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MDPI and ACS Style

Grgić, I.; Vukadinović, D.; Bašić, M.; Bubalo, M. Calculation of Semiconductor Power Losses of a Three-Phase Quasi-Z-Source Inverter. Electronics 2020, 9, 1642. https://doi.org/10.3390/electronics9101642

AMA Style

Grgić I, Vukadinović D, Bašić M, Bubalo M. Calculation of Semiconductor Power Losses of a Three-Phase Quasi-Z-Source Inverter. Electronics. 2020; 9(10):1642. https://doi.org/10.3390/electronics9101642

Chicago/Turabian Style

Grgić, Ivan, Dinko Vukadinović, Mateo Bašić, and Matija Bubalo. 2020. "Calculation of Semiconductor Power Losses of a Three-Phase Quasi-Z-Source Inverter" Electronics 9, no. 10: 1642. https://doi.org/10.3390/electronics9101642

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