Intelligent solid state relay with efficient protection function

Abstract

The invention discloses an intelligent solid state relay with an efficient protection function. The intelligent solid state relay comprises a shell and a control system, wherein a heat dissipation device is arranged in the shell; the heat dissipation device is arranged on a bottom board of the shell; a DCB board is arranged on the heat dissipation device; the DCB board is provided with an integrated circuit; the integrated circuit comprises a coupling circuit, a triggering circuit, a switching circuit, an absorbing circuit and a zero pass control circuit; the control system comprises a detection module, a control module and an execution module; the detection module is used for detecting a voltage and current in a relay circuit and temperatures of elements; the control module is used for receiving data of the detection module, comparing the data with a preset threshold, and sending an execution command; and the execution module is used for receiving the execution command sent by the control module to perform over-voltage protection, over-current protection and over-heat protection. Through adoption of the intelligent solid state relay, heat dissipation processing, over-current protection and over-voltage protection can be performed automatically and rapidly, and normal working of the solid state relay is protected effectively.

Description

Technical field [0001] The invention relates to a solid state relay, in particular to an intelligent solid state relay with automatic protection and heat dissipation functions. Background technique [0002] Solid State Relay (SSR) is a non-contact switch composed of microelectronic circuits, discrete electronic devices, and power electronic power devices. The isolation device is used to realize the isolation between the control end and the load end. The input terminal of the solid state relay uses a tiny control signal to directly drive a large current load. Solid state relays are non-contact electronic switches with isolation function. There are no mechanical contact parts during the switching process. Therefore, solid state relays have the same functions as electromagnetic relays, but also have logic circuit compatibility, vibration resistance and mechanical shock resistance, and unlimited installation positions , It has good moisture-proof, mildew-proof and anti-corrosion pe...

AI Technical Summary

Problems solved by technology

If the protection measures are improper or the response is not sensitive, it will not only cause the solid state relay to be out of control, but also may burn the solid state relay or equipment in severe cases.

The cause of the overvoltage damage of the solid state relay is the rise of the bus voltage, external noise (lightning surge) and the turn-off peak voltage of the inductive load, etc.

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