Abstract:In order to increase the control accuracy and achieve the unit power factor of totem-pole bridgeless PFC, and get sinusoidal current waveform, the method of synchronous reference frame is applied to the control of totem-pole bridgeless PFC in this paper. First of all, the working principle of totem pole bridgeless PFC is analyzed, and the topology of totem pole bridgeless PFC is improved. Secondly, the second-order generalized integrator is applied to solve the problem of the lack of an orthogonal degree of freedom in the synchronous reference frame of the totem-pole bridgeless PFC. Finally, the harmonic problem of DC side output voltage is analyzed, and the proposed algorithm is verified in Matlab/simulink simulations software platform.
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