Protection circuit based on relay control and power supply

By introducing an absorption unit and a freewheeling unit into the relay control circuit, the neglected impact on circuit reliability and peripheral circuits in the relay control circuit design is solved, and the stability and electromagnetic compatibility of the power circuit are improved.

CN119833354APending Publication Date: 2025-04-15SHAANXI GREEN ENERGY ELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202510117284.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-24
Publication Date
2025-04-15

AI Technical Summary

Technical Problem

The existing relay control circuit design lacks considerations on circuit reliability and impact on peripheral circuits, resulting in excessive electromagnetic compatibility and unstable power supply, which in turn affects the normal operation of the system.

Method used

A protection circuit based on relay control is designed to protect the stability of the power circuit by adding an absorbing unit and a freewheeling unit to the circuit to absorb the interference voltage and current generated during the relay's suction/release operation.

Benefits of technology

Effectively absorb current energy and voltage fluctuations generated during relay suction/release, improve the stability of relay control, reduce the impact on system power supply, and reduce oscillation in the circuit, ensuring the stable operation of the circuit during the relay switch operation.

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Abstract

The invention discloses a protection circuit and a power supply based on relay control, and belongs to the technical field of relays, the protection circuit comprises a driving power supply, an absorption unit, a follow current unit, a switch unit and a relay, the driving power supply is connected with a relay coil in the relay and is used for controlling the relay to be started and shut down; one end of the relay is connected with the driving power supply, and the other end is connected with the switch unit and grounded; the absorption unit is connected in parallel with two ends of the relay; the absorption unit is an RC circuit, and the follow current unit is connected to the two ends of the relay in parallel. According to the invention, the stability of the whole power supply loop is fully and effectively protected by absorbing and protecting the interference voltage and current generated during the actuation or release action of the relay, so that the influence on the environment in the action process of the circuit is smaller.
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