| A large number of harmonic current from electronic machines and electricpower devices generate emission of noise interference to peripheral deviceseasily, at the same time, electric network suffers harmonic pollution. Fornumerous and decentralized power supplies, the most effective method tosuppress harmonic source ultimately is Power Factor Correction (PFC).Recently, internal and overseas power supply fields put highly premium onPower Factor Correction technique. Especially, a new topology proposed do isa hot spot of Power Factor Correction technique.Firstly, the paper summarizes the current research situation of correctiontechnology for active power factor. Topologies of two-stage PFC convertersand single-stage PFC converters are compared with. Furthermore, the virtuesand defects of them are generalized.In the second place, at the beginning of operating principle analysis byhigh frequency resonance link leading-in Correction, the expression wasdeduced, and feasibility of realizing unit Power Factor was justified. The paperproposed the topology of novel single-stage isolated PFC converter andanalyzed the work principle of the circuit. Consequently, primary parametersand magnetic elements were designed. Resonance inductor instead of theinductor in two-stage Boost PFC converter works in Discontinuous ConductionMode (DCM). The converter that the paper proposed solves the problem ofexcessive dissipation of the switch in two-stage Boost PFC converter. PowerFactor is corrected and output voltage is regulated at the same time. MSP430microcontroller that is super low power acts as a master controller in thecontrol system, and digital control of this converter is realized.At last, the research of simulation and experiment is implemented on theproposed topology and control methods. A 120 W prototype was designed. Themeasured input current THD is 4.26%. Power Factor attains 0.998. Theprototype realizes the expectation.
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