专利内容由知识产权出版社提供
专利名称：Circuit for operating voltage range
extension for a relay
发明人：James J. Beckert,Paul A. Witt,Michael J.
Roller
申请号：US09915802申请日：20010726公开号：US06671142B2公开日：20031230
专利附图：
摘要：A relay is designed to be used in a circuit where the voltage levels are high incomparison to the spacing between the contacts when open. Contact closure arcing is
suppressed by actuating a MOSFET that shorts the contacts together while they open.The same MOSFET can momentarily short the contacts together just before they firstbegin to close, allowing a test current to be passed through the MOSFET and throughthe terminals connecting to both relay contacts, to insure that arc suppression will besuccessful; and if this test fails, then the relay can be disabled by a switch in series withthe relay coil to prevent arcing and a possible fire hazard. Relay deactuation can besensed to trigger arc suppression, and relay actuation can be sensed to initiate fail-safetesting by a circuit that responds no matter which way the relay coil is connected into theexternal circuit that drives it.
申请人：OMRON CORPORATION
代理机构：Foley & Lardner
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