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AssigneeValeo Siemens eAutomotive Germany GmbH
InventorsKarsten WIEDMANN, Markus REYMANN
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A control device (2) for an inverter (1) which has a DC voltage input (3) and a power unit (5) with three half-bridges (11u, 11v, 11w) each formed by two power switching elements (13u, 13v, 13w, 15u, 15v, 15w), the control device (2) being arranged to driving the power switching elements (13u, 13v, 13w, 15u, 15v, 15w) in a normal operating mode for converting a DC voltage applied to the DC voltage input (3) into a polyphase AC current provided at an AC current output (4), wherein the control means (2) is adapted to evaluate a signal state of a signal (21) indicating a disconnection of a DC voltage source (9) from the DC voltage input (3) and to control the power switching elements (13u, 13v, 13w, 15u, 15v, 15w) in dependence on a result of the evaluation for alternately adopting a first switching pattern causing DC braking and a second switching pattern causing freewheeling.
Control device (2) for an inverter (1) which has a DC voltage input (3) and a power unit (5) with three half-bridges (11u, 11v, 11w) each formed by two power switching elements (13u, 13v, 13w, 15u, 15v, 15w), the control device (2) being arranged to drive the power switching elements (13u, 13v, 13w, 15u, 15v, 15w) in a normal operating mode for converting a DC voltage applied to the DC voltage input (3) into a polyphase AC current provided at an AC current output (4),
Method of operating an inverter (1) which has a DC input (3) and a power unit (5) having three half-bridges (11u, 11v, 11w) formed by two power switching elements (13u, 13v, 13w, 15u, 15v, 15w) each, comprising the following steps:
Dependencies are inferred from the claim text.