Invention Grant
- Patent Title: Free-wheeling circuit
- Patent Title (中): 续流电路
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Application No.: US13498663Application Date: 2010-08-10
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Publication No.: US08830649B2Publication Date: 2014-09-09
- Inventor: Christian Oppermann , Bernhard Streich
- Applicant: Christian Oppermann , Bernhard Streich
- Applicant Address: DE Munich
- Assignee: Siemens Aktiengesellschaft
- Current Assignee: Siemens Aktiengesellschaft
- Current Assignee Address: DE Munich
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: DE102009043415 20090929
- International Application: PCT/EP2010/061621 WO 20100810
- International Announcement: WO2011/038969 WO 20110407
- Main IPC: H01H1/00
- IPC: H01H1/00

Abstract:
A free-wheeling circuit is disclosed for the rapid reduction of a shutdown overvoltage of an inductive load when the latter is shut down. The free-wheeling circuit includes a switching threshold component by which the free-wheeling circuit becomes active more rapidly compared to a free-wheeling circuit without said switching threshold component, thereby ensuring a more rapid reduction of the shutdown overvoltage. If a control voltage provided by a control voltage source falls below a threshold voltage set by the switching threshold component, a capacitive energy accumulator is immediately discharged and not only when the control voltage is reduced to near zero, and the energy accumulator then activates the free-wheeling circuit for reducing the shutdown overvoltage, when in the nearly discharged state.
Public/Granted literature
- US20120188675A1 FREE-WHEELING CIRCUIT Public/Granted day:2012-07-26
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