Driving circuit for an electric motor
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United States of America Patent
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Jun 23, 2015
Grant Date -
Feb 26, 2015
app pub date -
Aug 26, 2013
filing date -
Aug 26, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
In various embodiments a circuit arrangement is provided, having a bridge circuit including at least two switches connected in series; a bridge node which may provide a phase voltage arranged between the at least two switches; an electric motor having at least one phase winding coupled with the bridge node; a decoupling switch; a controller, wherein in an error case the controller may be configured to switch off the at least two switches, to determine whether a predefined condition is satisfied, and to one of delayed switching off the decoupling switch; and switching off the at least two switches and the decoupling switch simultaneously, depending upon whether the predefined condition is satisfied; wherein the controller may determine that the predefined condition is satisfied when the decoupling switch may be switched off without damage from the current applied to it when the at least two switches are switched off.
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