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Lu, Yun Wang

University of British Columbia

Six novel single-stage single-phase buck-boost inverters are proposed in this thesis. The inverters that are introduced can accept a wide input voltage range and can provide a large variation in output voltage. In addition, the leakage current is negligible in five of the proposed inverters which makes these inverters suited for photovoltaic applications. The novel topologies are simple in structure and operation, requiring from four to six switches and just a single inductor. Moreover, in all the proposed inverters, the majority of the switches are driven at line frequency which results in negligible switching loss. Furthermore, synchronous switching is applied to some of the high frequency switches to further reduce power loss. Consequently, high efficiency can be achieved. This thesis includes detailed operation and circuit analysis for the switching modes for all the proposed inverters. In addition, the inverters’ design method and components’ parameters are examined in detail. Hardware prototypes was fabricated to verify the proposed topologies with the operating parameters of 120 Vrms/ 60 Hz. The experimental results verify the operation and theoretical analysis of the proposed inverters

Text

2024-09-10

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/89215

Electrical Engineering

University of British Columbia

UBCO

http://creativecommons.org/licenses/by-nc-nd/4.0/