| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 104 === In this thesis, a high step-up ratio boost converter is investigated and implemented. This circuit can be used in the situation requiring high step-up conversion ratio. It uses positive cascade structure to achieve the high step-up conversion ratio requirement. The advantages of the circuit include simple structure, small component count, and easiness to control …etc. Moreover, when duty cycle operates below 70%, the step-up conversion ratio can be more than 800%. This thesis will firstly introduce the operation mode of the high step-up ratio boost converter and analyze its operation theory. Finally, a 50 V input voltage, 400 V output voltage, 2000 W output power and a efficiency higher-than 90% efficiency high step-up ratio boost converter is designed and implemented to verify the feasibility of this high step-up ratio boost converter circuit.
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