SINGLE-PHASE NON-BRIDGE TYPE INSULATED POWER FACTOR ADJUSTMENT CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a single-phase non-bridge type insulated power factor adjustment circuit that has advantages that a conduction loss is low, problems are reduces, a circuit is simple, which enables cost saving, a volume is small, and a conversion efficiency is high.SOLUTION: A single-phase non-bridge type insulated power factor adjustment circuit includes: an EMI filter module; a low-frequency switching diode module; two switches; and two insulated voltage conversion modules. The EMI filter module is connected with an AC power supply. The low-frequency switching diode module is connected with the EMI filter module. The two switches are connected with the low-frequency switching diode module. The two insulated voltage conversion modules are connected with any one of the two switches, respectively. When the low-frequency switching diode module is in a first or second conduction state, any one of the two switches is made conductive to turn on one of the insulated voltage conversion modules so as to correspond to a different conduction state.SELECTED DRAWING: Figure 4