Abnormal-Voltage Protection Apparatus With Delayed Switch Activation
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Solution Overview
Problem
Existing abnormal-voltage protection apparatuses with relay switches experience frequent activation due to unstable power conditions, leading to reduced lifespan and inefficient power supply when returning to normal voltage, causing potential damage and safety hazards.
Innovation Solution
An abnormal-voltage protection apparatus comprising a switch unit, voltage detection unit, and delay time control unit, where the delay time control unit delays the activation of the switch unit by a predetermined time after detecting a return to normal voltage, ensuring stable power supply and extending the lifespan of the switch unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the relay switch is immediately turned on when voltage returns to normal, then the load receives power quickly, but the relay switch experiences frequent activation and reduced lifespan
Solution Approach 1:
The patent applies preliminary action by introducing a delay time control unit that waits for a predetermined period before turning on the relay switch after voltage normalization. This preliminary waiting period allows the power source to stabilize completely, preventing immediate re-activation that would cause frequent relay switching and extend relay lifespan while still restoring power efficiently.
2Productivity
If the relay switch is immediately turned on when voltage returns to normal, then power is restored quickly, but the power supply remains unstable causing frequent re-abnormality
Solution Approach 1:
The delay time control unit performs preliminary action by waiting for a predetermined period after voltage normalization before restoring power to the load. This preliminary stabilization period ensures the power source composition becomes stable and stops fluctuating, preventing frequent re-abnormality while maintaining efficient power restoration.
3Extent of automation
If the relay switch is frequently activated due to unstable power conditions, then the system responds quickly to voltage changes, but the switch unit damage and safety hazards increase
Solution Approach 1:
The patent applies preliminary action through the delay time control unit that waits for a predetermined period before turning on the switch unit after detecting voltage normalization. This preliminary waiting ensures the power source is fully stable, preventing frequent switch activations that cause damage and safety hazards, while maintaining automated voltage response capability.
Data Source
AI summary
An abnormal-voltage protection apparatus includes a switch unit, a voltage detection unit, and a delay time control unit. The switch unit is coupled to a power supplying path formed between an AC power source and a load. The voltage detection unit detects the AC power source and provides a detection signal. The delay time control unit is coupled to the voltage detection unit and the switch unit, and receives the detection signal and provides a control signal to the switch unit according to the detection signal. When the voltage detection unit detects that the AC power source changes from an abnormal voltage to a normal voltage, the delay time control unit turns on the switch unit by the control signal after a delay time so that the AC power source supplies power to the load through the power supplying path.