发明名称 |
PHASE DIFFERENCE FAULT DETECTOR |
摘要 |
<p>Apparatus and method for monitoring a self-regulating heater comprising a PTC conductive polymer while it is being powered by a power supply signal. The apparatus is connected to a power supply and to the heater, the heater then producing a heater signal which is fed to a comparator. The comparator deterines the phasal relationship between the power supply signal and the heater signal and indicates when the signals are out of phase by a predetermined magnitude.</p> |
申请公布号 |
EP0200312(B1) |
申请公布日期 |
1991.02.06 |
申请号 |
EP19860301801 |
申请日期 |
1986.03.13 |
申请人 |
RAYCHEM CORPORATION (A DELAWARE CORPORATION) |
发明人 |
BLIVEN, DAVID C. |
分类号 |
G01R25/00;G01R31/00;H05B3/00 |
主分类号 |
G01R25/00 |
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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