Invention Grant
- Patent Title: Hybrid switch circuit
- Patent Title (中): 混合开关电路
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Application No.: US12976432Application Date: 2010-12-22
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Publication No.: US08614866B2Publication Date: 2013-12-24
- Inventor: Richard J. Billingsley , Robert A. Dawley
- Applicant: Richard J. Billingsley , Robert A. Dawley
- Applicant Address: US NC Knightdale
- Assignee: Electronic Systems Protection, Inc.
- Current Assignee: Electronic Systems Protection, Inc.
- Current Assignee Address: US NC Knightdale
- Agency: Edell, Shapiro & Finnan, LLC
- Main IPC: H02H3/00
- IPC: H02H3/00 ; H02H7/00 ; H02H3/20 ; H02H3/08 ; H02H9/02

Abstract:
A hybrid switch circuit includes a hybrid switch that couples an input conductor connected to an AC power supply to an output conductor connected to a load. The hybrid switch includes a power semiconductor in parallel with an electromagnetic relay. A control circuit turns on the hybrid switch by turning on the power semiconductor at a zero-voltage crossing of the AC voltage to provide a conductive path and then closing the relay to provide a conductive bypass path that bypasses the power semiconductor. The control circuit turns off the hybrid switch by opening the relay and subsequently turning off the power semiconductor at a zero crossing of the load current. The control circuit operates in response to at least one switch control signal that indicates whether an operating fault condition exists.
Public/Granted literature
- US20110102052A1 Hybrid Switch Circuit Public/Granted day:2011-05-05
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