Electricity limit protection switch device
AssigneeSun-Lite Sockets Industry Inc.
InventorWen-Ho Yang
Life of this patent
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Abstract
An electricity limit protection switch includes a relay, a sample-hold circuit having a current mutual inductor and an operational amplifier, and a compare and execution circuit having a plurality of operational amplifiers to operate the signal from the sample-hold circuit and a control element to control operation of the relay according to operation of the operational amplifiers so as to turn on or turn off the relay. Thus, the electricity limit protection switch can achieve an electricity limit protection purpose by sensing the magnitude of the current passing through the load.
Claims18
An electricity limit protection switch, comprising a circuit device comprising:
- a relay electrically connected to a load;
- a sample-hold circuit including a current mutual inductor and a first operational amplifier, wherein the current mutual inductor includes a primary winding and a secondary winding, the primary winding of the current mutual inductor is electrically connected to the relay and the load;
- a compare and execution circuit used to receive a signal from the sample-hold circuit and electrically connected to the relay, wherein the compare and execution circuit includes a plurality of second operational amplifiers to operate the signal from the sample-hold circuit, and a control element to control operation of the relay according to operation of the operational amplifiers so as to turn on or turn off the relay.
Dependencies are inferred from the claim text.