| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 95 === This thesis is focused on the design and implementation of a multiphase interleaved boost power factor corrector (PFC) to achieve a high power factor, low input current harmonics, a high efficiency and a high power density. A multiphase interleaved boost PFC features the advantages of a PWM boost converter. In addition, the voltage and current ratings of the power switches, and the volumes of inductors, output capacitors and EMI filters can be reduced.
A 1500-W three-phase interleaved Boost PFC is implemented in the laboratory. Experiments are conducted and satisfactory results are measured to confirm the effectiveness and the feasibility of the theoretical analysis and design consideration. The UC-3854AN is used as the control IC for the PFC, and the monostable multivibrator IC, HEF4528B, is adopted to construct the phase shift circuit. The power stage consists of three boost PFC converters. It is verified that the current ripples are greatly reduced with the multiphase interleaved topologies. Thus the three-phase interleaved PFC’s are especially suitable for serving as a pre-regulator in the high-power applications.
Keywords: Interleaved power factor corrector, multiphase parallel power factor corrector, phase shift circuit
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