DRIVING CIRCUIT FOR RELAY
First Claim
1. A driving circuit for relay, comprising:
- a plurality of relays, having coils coupled to a power supply, the power supply providing a driving voltage to the coils of the plurality of relays, and the coils of the plurality of relays coupled to each other;
a switching control circuit, coupled to the coils of the plurality of relays and a reference voltage, and controlling on/off of the coils of the plurality of relays according to a driving signal; and
a driving control circuit, coupled to the coils of the plurality of relays, controlling excitation of the coils of the plurality of relays, and controlling the voltage of the coils of the plurality of relays to be greater than or equal to one Nth of the driving voltage, respectively, and to be smaller than or equal to the driving voltage, respectively, where N is the number of the plurality of relays and N is greater than one.
1 Assignment
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Accused Products
Abstract
The present invention relates to a driving circuit for relay, which uses N relays with their coils coupled to each other. One of the relays is coupled to a driving power supply. A switching control circuit is coupled to a second relay and a reference voltage for controlling on/off of the plurality of relays. A driving control circuit is coupled to the plurality of relays for controlling excitation of the plurality of relays. After the coils of the relays are excited by the driving control circuit, the voltage of a single coil is dropped to one Nth of the driving voltage. Thereby, the power consumption of the coils of the relays can be reduced, and hence enhancing the lifetime and reliability of the relays.
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Citations
12 Claims
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1. A driving circuit for relay, comprising:
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a plurality of relays, having coils coupled to a power supply, the power supply providing a driving voltage to the coils of the plurality of relays, and the coils of the plurality of relays coupled to each other; a switching control circuit, coupled to the coils of the plurality of relays and a reference voltage, and controlling on/off of the coils of the plurality of relays according to a driving signal; and a driving control circuit, coupled to the coils of the plurality of relays, controlling excitation of the coils of the plurality of relays, and controlling the voltage of the coils of the plurality of relays to be greater than or equal to one Nth of the driving voltage, respectively, and to be smaller than or equal to the driving voltage, respectively, where N is the number of the plurality of relays and N is greater than one. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification