Overvoltage cut-off circuit and overvoltage cut-off system
By designing an overvoltage cutting circuit including a step-down module, a voltage comparison module and a switch module, the problem of electrical appliance damage caused by instability of the input voltage is solved, effective high-voltage protection is achieved, and the stability and reliability of the circuit are improved.
CN119695782APending Publication Date: 2025-03-25HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Patent Information
- Application Number
- CN202411628159.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-03-25
AI Technical Summary
Technical Problem
The input voltage is unstable and the electrical appliance is damaged due to the high voltage connection.
Method used
Design an overvoltage cutting circuit, including a step-down module, a voltage comparison module and a switching module. When the input voltage of the external power supply exceeds the preset value, the voltage comparison module cuts off the power supply of the electrical appliance through the voltage division and comparison control switch module.
Benefits of technology
Effectively prevent electrical appliances from being damaged by high voltage connection, and improve the stability and reliability of the overvoltage cutting circuit.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides an overvoltage cut-off circuit and an overvoltage cut-off system, which can cut off the power supply of an external electric appliance when the input voltage of an external power supply exceeds a preset voltage value, thereby preventing the electric appliance from being damaged due to the access of high voltage. The overvoltage cut-off circuit comprises a voltage reduction module, a voltage comparison module and a switch module. The voltage reduction module is used for obtaining a preset comparison voltage; the switch module is used for controlling whether to cut off the power supply of the electric appliance according to the comparison result of the voltage comparison module; the voltage comparison module is used for dividing the comparison voltage and the voltage of the positive electrode of the input voltage, comparing the divided comparison voltage and the divided voltage of the positive electrode of the input voltage, and controlling the switch module to cut off the power supply of the electric appliance according to the comparison result.
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