发明名称 |
Circuit for detecting short-circuiting of inductive load drive devices |
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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申请公布号 |
US5341282(A) |
申请公布日期 |
1994.08.23 |
申请号 |
US19920865421 |
申请日期 |
1992.04.08 |
申请人 |
SGS-THOMSON MICROELECTRONICS S.R.L. |
发明人 |
BRAMBILLA, MASSIMILIANO;MAGGIONI, GIAMPIETRO |
分类号 |
G01R31/02;H01H47/32;H02H3/08;H02H9/04;(IPC1-7):G05F1/573 |
主分类号 |
G01R31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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