Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 36, Issue 5, Pages 6030-6045Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.3026824
Keywords
Switches; Inverters; Zero voltage switching; Legged locomotion; Reactive power; Switching frequency; RLC circuits; Space vector modulation (SVM); three-phase inverter; zero-voltage-switching (ZVS)
Categories
Funding
- National Natural Science Foundation of China [51777189]
- National Key R&D Program of China [2018YFB1500701]
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A general ZVS-SVM method for three-phase inverters with arbitrary output is proposed in this article, with detailed discussions on vector selection and vector sequence arrangement principles to achieve operation within wide power factor angle range and ZVS. The effectiveness of the method is verified through experiments.
Three-phase inverters are usually required to output reactive power in electric machine drives, renewable energy generation, static var generators, and other power electronic systems. Therefore, the inverter may operate within wide power factor angle range. However, the traditional zero-voltage-switching space vector modulation (ZVS-SVM) method for three-phase inverters is only applicable when power factor angle is between -pi/6 and +pi/6. In this article, a general ZVS-SVM method for three-phase inverter with arbitrary output is proposed. The principles for vector selection and vector sequence arrangement are discussed in detail. With only one switching operation of the auxiliary switch in each switching cycle, ZVS of all switches can be achieved. Operation stage analyses and ZVS condition of the inverter with the proposed method are introduced. In addition, the resonant parameters design considerations and loss analyses are investigated. Finally, the proposed ZVS-SVM method is verified by the experiment.
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