发明名称 |
Wetting Current Diagnostics |
摘要 |
A circuit for diagnostic testing includes a current source coupled to a power source and configured to provide wetting current along a path to a load control switch, a current sensor connected in series with the current source along the path, the current sensor being configured to generate a current sensor signal indicative of a current level along the path, a voltage measurement unit having an input terminal coupled to a node along the path through which the wetting current flows to reach the load control switch, the voltage measurement unit being configured to detect a state of the load control switch based on a voltage at the node, and a controller coupled to the current sensor and the voltage measurement unit, the controller being configured to determine a wetting current diagnostic condition in accordance with the current level and the detected state. |
申请公布号 |
US2016238658(A1) |
申请公布日期 |
2016.08.18 |
申请号 |
US201514624778 |
申请日期 |
2015.02.18 |
申请人 |
Edwards William E.;Gray Randall C.;Andresen Anthony F. |
发明人 |
Edwards William E.;Gray Randall C.;Andresen Anthony F. |
分类号 |
G01R31/327;G01R19/165 |
主分类号 |
G01R31/327 |
代理机构 |
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代理人 |
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主权项 |
1. A circuit for diagnostic testing regarding wetting current provided to a load control switch, the circuit comprising:
a current source coupled to a power source and configured to provide the wetting current along a path to the load control switch; a current sensor connected in series with the current source along the path, the current sensor being configured to generate a current sensor signal indicative of a current level along the path; a voltage measurement unit having an input terminal coupled to a node along the path through which the wetting current flows to reach the load control switch, the voltage measurement unit being configured to detect a state of the load control switch based on a voltage at the node; and a controller coupled to the current sensor and the voltage measurement unit, the controller being configured to determine a wetting current diagnostic condition in accordance with the current level and the detected state of the load control switch. |
地址 |
Ann Arbor MI US |