Solid state relay/circuit breaker system
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United States of America Patent
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N/A
Issued Date -
Nov 27, 2003
app pub date -
Jan 28, 2003
filing date -
Jan 28, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The relay system of the present invention comprises a field effect device such as a MOSFET and a microprocessor that controls the on and off states of the field effect transistor. The processor monitors the current supplied to the field effect device and open circuits the device if the current exceeds a selected value. Importantly, the present invention uses a field effect device and microprocessor, as opposed to contacts, a coil and a downstream circuit breaker like conventional electromechanical relays. Unlike an electromechanical relay, the solid state relay is free of problems that arise from having mechanical parts. The solid state relay fuse is free of arcing, sparking, and there are no contact materials that can wear out or generate noise. Because of the use of a microprocessor, the solid state relay has a faster switching speed, and there are no switching voltage spikes from turning on a coil.
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