Zero-current switched-off solid state relay

A technology of solid state relay and zero current shutdown, which is applied in the direction of electronic switches, electrical components, pulse technology, etc., and can solve problems such as overvoltage, charging current of large capacitive loads, and high current impact of solid state relays.
CN102055451AInactive Publication Date: 2011-05-11北京众智同辉科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京众智同辉科技有限公司
Publication Date
2011-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a zero-current switched-off solid state relay, which comprises a power voltage zero-crossing pulse generation circuit, a switching-off pulse generation circuit, an external control switch signal circuit, a switch master control circuit and a switch transistor circuit, wherein the output end of the power voltage zero-crossing pulse generation circuit is electrically connected with the voltage signal input end of the switch master control circuit; the output end of the switching-off pulse generation circuit is electrically connected with the switching-off signal input end of the switch master control circuit; the output end of the external control switch signal circuit is electrically connected with the control signal input end of the switch master control circuit; and the control signal output end of the switch master control circuit is electrically connected with the input end of the switch transistor circuit. The solid state relay can be switched on in the zero-crossing of a power voltage and switched off in the zero-crossing of a load current, avoids relatively more intensive impact to a switch at the moment of switching a circuit on and off, protects the switch and prolongs the service life of the switch.
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Description

Technical field

[0001] The invention relates to a zero-current turn-off solid-state relay. The solid-state relay includes a power supply voltage zero-crossing pulse generating circuit, a turn-off pulse generating circuit, an external control switch signal circuit, a switch main control circuit, and a switch transistor circuit. The solid state relay power supply Turns on when the voltage crosses zero, and turns off when the load current crosses zero. technical background

[0002] Solid state relays (SSR), also known as solid state relays, are a new type of non-contact electronic switching device composed of electronic components developed by the combination of modern microelectronics technology and power electronic technology , It uses the switching characteristics of electronic components to achieve the purpose of making and breaking the circuit without contact and spark. The relay is a four-terminal device, including two input terminals and two output terminals. The input termi...

Claims

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