BRIDGELESS PFC POWER CONVERTER WITH HIGH EFFICIENCY

摘要

A bridgeless PFC boost converter has two auxiliary transistor switches coupled to an input AC voltage source and two boost inductors coupled to opposing ends of the input AC voltage source. A first boost inductor is coupled to a junction node of a first rectifying diode and a first transistor switch coupled in series. A second boost inductors is coupled to a junction node of a second rectifying diode and a second transistor switch coupled in series. The rectifying diodes are commonly coupled to an output capacitor, and the transistor switches are commonly coupled to a second node of the output capacitor. A first auxiliary transistor switch is commonly coupled with the first boost inductor and to a first node of the input AC voltage source. A second auxiliary transistor switch is commonly coupled with the second boost inductor and to a second node of the input AC voltage source.

主权项

1. A bridgeless power factor correction boost converter comprising:
a. a first boost inductor coupled to a first node of an AC voltage source; b. a first transistor switch coupled to the first boost inductor; c. a first rectifying diode comprising an anode coupled to the first boost inductor and the first transistor switch; d. a second boost inductor coupled to a second node of an AC voltage source; e. a second transistor switch coupled to the second boost inductor; f. a second rectifying diode comprising an anode coupled to the second boost inductor and the second transistor switch; g. an output capacitor coupled in parallel to the first rectifying diode and the first transistor switch and in parallel to the second rectifying diode and the second transistor switch; h. a third transistor switch coupled to the first node of the AC voltage source; and i. a fourth transistor switch coupled in parallel to the second boost inductor and the second transistor switch.