US 9,812,961 B2
Direct current conversion device and operation method of the same
Guo-Qiao Shen, Taoyuan (TW); Yu-Ming Chang, Taoyuan (TW); Jin-Fa Zhang, Taoyuan (TW); and Guo-Jin Xu, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Mar. 25, 2016, as Appl. No. 15/80,603.
Claims priority of application No. 2015 1 0184329 (CN), filed on Apr. 17, 2015.
Prior Publication US 2016/0308433 A1, Oct. 20, 2016
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 2001/008 (2013.01); H02M 2001/0074 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A direct current (DC) conversion device comprising:
a first DC converter comprising a first input end to receive a first input current and a first input voltage, and a first output end to generate a first output current and a first output voltage, wherein the first output end is electrically coupled to a first energy storing element;
a second DC converter comprising a second input end to receive a second input current and a second input voltage, and a second output end to generate a second output current and a second output voltage, wherein the second output end is electrically coupled to a second energy storing element;
a voltage difference adjusting unit electrically coupled to the first DC converter and the second DC converter to generate a voltage difference adjusting signal;
a first control unit to generate a first control signal to control the first DC converter;
a second control unit to generate a second control signal to control the second DC converter to balance the first output voltage and the second output voltage according to the voltage difference adjusting signal; and
wherein the first output voltage and the second output voltage are DC voltages, and the voltage difference adjusting signal is dependent on voltage difference between the first output voltage and the second output voltage.