High-Power Switch Protection Using Threshold Signal Control
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Solution Overview
Problem
High-power electrical switches face significant damage risks due to sudden power changes, especially in appliances above 3000 W, leading to increased maintenance costs and switch failure, which existing technologies do not adequately address.
Innovation Solution
A switch protection system incorporating a sensor assembly and microcontroller to sense circuit signals, compare them with threshold values, and control the switch's conductive and non-conductive states to prevent damage by executing instructions only when signal values are within safe limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a switch is used in high-power electrical appliances (above 3000 W), then the appliance can operate at high power, but the switch is at risk of damage due to instantaneous power changes
Solution Approach 1:
The control unit checks the circuit signal value before executing the control instruction to switch the switch. By performing this preliminary check, the system ensures that switching only occurs when safe (circuit signal value ≤ threshold), preventing damage before it can occur
Solution Approach 2:
The sensor assembly continuously monitors the circuit signal value and feeds this information back to the control unit. The control unit uses this feedback to determine whether to execute the control instruction, creating a closed-loop protection mechanism that adapts to real-time circuit conditions
2Device complexity
If no protection circuit is designed for the switch, then the device complexity is reduced and cost is lowered, but the switch is vulnerable to damage from instantaneous power changes
Solution Approach 1:
A sensor assembly is introduced as an intermediary component between the power source and the switch. This sensor monitors circuit signal values and provides information to the control unit, enabling protection without requiring complex additional protection circuits
Solution Approach 2:
The patent replaces traditional mechanical protection circuits with an electronic control system comprising a sensor assembly and a microcontroller-based control unit. This substitution reduces hardware complexity while providing intelligent, adaptive protection through software-based decision making
Data Source
AI summary
A switch protection system and a switch protection method are provided. The switch protection system includes a switch, a sensor assembly, and a microcontroller. The switch is configured to control a conductive state or a non-conductive state of a circuit. The sensor assembly is arranged between a power source and the switch, so as to sense a circuit signal value between the power source and the switch. The microcontroller is correspondingly connected to the switch and the sensor assembly so as to receive the circuit signal value, and compare the circuit signal value with a threshold value to determine whether or not to execute a control instruction. The control instruction is configured to switch the conductive state and the non-conductive state of the switch. When the circuit signal value is less than or equal to the threshold value, the microcontroller is configured to execute the control instruction.