发明授权
US5341282A Circuit for detecting short-circuiting of inductive load drive devices
失效
用于检测感性负载驱动装置短路的电路
- 专利标题: Circuit for detecting short-circuiting of inductive load drive devices
- 专利标题(中): 用于检测感性负载驱动装置短路的电路
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申请号: US865421申请日: 1992-04-08
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公开(公告)号: US5341282A公开(公告)日: 1994-08-23
- 发明人: Massimiliano Brambilla , Giampietro Maggioni
- 申请人: Massimiliano Brambilla , Giampietro Maggioni
- 申请人地址: ITX
- 专利权人: SGS-Thomson Microelectronics S.r.l.
- 当前专利权人: SGS-Thomson Microelectronics S.r.l.
- 当前专利权人地址: ITX
- 优先权: ITXT091A000253 19910409
- 主分类号: G01R31/02
- IPC分类号: G01R31/02 ; H01H47/32 ; H02H3/08 ; H02H9/04 ; G05F1/573
摘要:
An inductive load drive device which has a switch defining an output terminal connectable to an inductive load between the output terminal and a reference potential line is provided. A first current recirculating branch is connectable parallel to the load and a control opens and closes the switch so that the load is supplied with current rising to a first predetermined value in a first increasing phase and falling to a second predetermined value in a first recirculating phase. The device detects a short-circuit between the output terminal of the control device and the reference potential line with a first current sensor for detecting current flow in the first recirculating branch during the first recirculating phase. A fault signaling circuit connected to the first current sensor produces a short-circuit signal in the absence of current in the first recirculating branch during the first recirculating phase.
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