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专利名称：DC bus balancer circuit发明人：Nielsen, Henning Roar申请号：EP13152794.7申请日：20080220公开号：EP2587620A3公开日：20130703
专利附图：
摘要：A DC bus balancer for use with four-level DC power including first, second, third,and fourth voltages (V+, V+/3, V-/3, V-), the circuit comprising: first, second, third, andfourth nodes (1310, 1311, 1313, 1314) configured to receive the four-level DC power; first,second, third, fourth, fifth, and sixth switches (1235, 1245, 1255, 1265, 1275, 1285) coupled
in series between the first and fourth nodes, wherein the second node is coupled to ajunction of the second and third switches and the third node is coupled to a junction ofthe fourth and fifth switches; a first diode (1240) coupled in parallel with the first switch; asecond diode (1250) coupled in parallel with the second switch; a third diode (1260)coupled in parallel with the third switch; a fourth diode (1270) coupled in parallel with thefourth switch; a fifth diode (1280) coupled in parallel with the fifth switch; a sixth diode(1290) coupled in parallel with the sixth switch; a first resonant tank (1320) coupled to ajunction of the first and second switches and to the junction of the third and fourthswitches; and a second resonant tank (1325) coupled to the junction of the third andfourth switches and to the junction of the fifth and sixth switches; wherein the first andsecond resonant tanks are configured to shift energy between at least two of the first,second, third, and fourth nodes if an absolute value of the first voltage differs from anabsolute value of the fourth voltage; and wherein the first and second resonant tanks areconfigured to shift energy between at least two of the first, second, third, and fourthnodes if an absolute value of the second voltage differs from an absolute value of thethird voltage.
申请人：American Power Conversion Corporation
地址：132 Fairgrounds Road West Kingston, RI 022 US
国籍：US
代理机构：Hewett, Jonathan Michael Richard
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