US 12,255,529 B2
Power factor correction and DC-DC multiplexing converter and uninterruptible power supply including the same
Kai Liu, Shenzhen (CN); Yusong Ding, Shenzhen (CN); and Zhongyong Xu, Shenzhen (CN)
Assigned to Lian Zheng Electronics (Shenzhen) Co., Ltd., Shenzhen (CN)
Filed by LIAN ZHENG ELECTRONICS (SHENZHEN) CO., LTD., Shenzhen (CN)
Filed on Feb. 8, 2023, as Appl. No. 18/166,091.
Claims priority of application No. 202210121420.X (CN), filed on Feb. 9, 2022.
Prior Publication US 2023/0253877 A1, Aug. 10, 2023
Int. Cl. H02M 1/42 (2007.01)
CPC H02M 1/4258 (2013.01) [H02M 1/4225 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A power factor correction (PFC) and DC-DC multiplexing converter, comprising:
a multiplexing bridge arm comprising:
a first inductor having a first terminal configured to be selectively connected to utility power or a battery;
a first switching transistor and a second switching transistor connected in reverse series between a second terminal of the first inductor and a neutral point;
positive and negative direct current buses;
a first capacitor and a second capacitor respectively connected between the positive and negative direct current buses and the neutral point;
a first diode having an anode connected to a terminal of the first inductor and a cathode connected to the positive direct current bus; and
a third switching transistor having a first terminal connected to the second terminal of the first inductor and a second terminal connected to the negative direct current bus; and
a battery hookup bridge arm connected between the battery and the multiplexing bridge arm and configured to alternately supply power to the positive and negative direct current buses; and
wherein the PFC and DC-DC multiplexing converter selectively causes one electrode of a positive electrode and a negative electrode of the battery to be alternately connected to the neutral point and one of the positive and negative direct current buses that has the same polarity as the one electrode or one electrode of a positive electrode and a negative electrode of the battery to be constantly connected to the neutral point.