Circuit arrangement with half-bridge

Details Circuit arrangement with half-bridge Circuit arrangement with half-bridge

H - Electricity

03

H

H03H 11/00 (2006.01) H02P 7/292 (2006.01) H03K 17/0814 (2006.01) H05B 41/14 (2006.01) H02M 7/538 (2006.01)

Patent

CA 2305125

The invention relates to a circuit arrangement having a half-bridge arrangement comprising a first and a second switch (T1;T2), each switch (T1;T2) having, between its operating and reference electrodes, an internal diode (DB1;DB2), which is reverse-connected in parallel with the main current flow direction of the respective switch (T1;T2), and also an internal capacitance (C oss1;C oss2), a series diode (DS1;DS2) being arranged in series with the respective switch (T1;T2) in the main current flow direction in such a way that current can flow in the main current flow direction, and a freewheeling diode (DF1;DF2) being connected in parallel with the respective series circuit formed by the switch (T1;T2) and the series diode (DS1;DS2), and having a load circuit (L;RL), which has at least one inductive component (L) and is connected to the midpoint of the half-bridge arrangement. In order to reduce the failure rate of the series diodes (DS1;DS2), a load-relieving capacitance (CE1;CE2) is connected in parallel with each series diode (DS1;DS2).

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