Circuit for charging a battery and for driving a three-phase electrical machine

DRIVE October 9, 2013
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A circuit (102) is provided for charging a battery (104) and for driving an electrical machine (180) comprising at least three static inductors (182, 184, 186) in Wye configuration having a first charging terminal (188) connected to the centre point. The circuit (102) comprises a three-phase inverter comprising switches (112, 116, 122, 126, 132, 136) and rectifying elements (114, 118, 124, 128, 134, 138), two DC terminals (152, 154) for connecting the battery (104) to the circuit (102); and three phase terminals (162, 164, 166) for connecting the circuit (102) to the inductors (182, 184, 186). The circuit (102) further comprises a first rectifying element (144) and a second rectifying element (148) connected in series to one another, with a second charging terminal (172) being provided between the first rectifying element (144) and the second rectifying element (148). The series of the first rectifying element (144) and the second rectifying element (148) is connected to the inverter parallel to the DC terminals (152, 154) and the first rectifying element (144) and the second rectifying element (148) have the same orientation as the rectifying elements (114, 118, 124, 128, 134, 138) of the inverter as to form a full-bridge rectifier.

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