| Summary: | 碩士 === 國立臺北科技大學 === 電機工程系所 === 105 === Two multi-input-single-output converters are presented in the thesis, which are suitable for the renewable system with diffenent energy sources under individual maximum power tracking points. The first one is called “An interleaved maximum power point tracking high step-up converter”. This converter utilizes interleaved switches to slove a problem its original circuit features, such as low voltage stresses on switches, a high step-up voltage gain, etc. The second one is called “A high step-up flyback converter with multiple energy sources concentrated”. Such a converter, possessing a high step-up voltage gain, a non-pulsating output current, galvanic isolation, etc., employs a coupled inductor and energy transferring capacitors to concentrate various energy sources. Furthermore, the input count of these two converters can be increased. In addition, for the latter converter, no matter what energy source count is, there is no need to increase the number of coupled inductors and the number of windings. In this thesis, the basic principles of these two converters are described and analyzed, and the associated hardware circuits are designed. The feasibility of the proposed converters is verified by simulation based on Powersim (PSIM). Afterwards, these two converters are applied to the thermoelectric system along with the three-point-weighting method, to realize the maximum power point tracking. In addition, a field programmable logic gate array (FPGA), named EP1C3T100C8N, is used as a circuit control kernel along with thermoelectric modules, named TGM-199-1.4-0.8 manufactured by Kryotherm Co., to demonstrate the effectiveness of the proposed thermoelectric system.
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