Power Switching Apparatus with Adjustable Delay Circuit
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Solution Overview
Problem
Existing power switching apparatuses for network communication equipment lack adjustable switching times and can malfunction, leading to frequent switching between main and auxiliary power, which may cause system failures.
Innovation Solution
A power switching apparatus comprising a detection circuit with a voltage adjusting unit, a delay unit, a first switch unit, and an isolation unit, along with a control circuit that adjusts the switching time by controlling the conduction path between the auxiliary power input and output sides, ensuring the switching time meets system requirements and preventing malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power switching apparatus uses fixed switching time, then the circuit structure is simple, but it cannot meet different switching time requirements for various systems
Solution Approach 1:
The patent applies the dynamics principle by making the switching time adjustable through a delay circuit that can be configured with different time constants. The switching time is no longer fixed but can be dynamically adapted to different system requirements by changing the delay circuit parameters, thereby resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The patent implements parameter changes by allowing the switching time parameter to be modified through the delay circuit configuration. By changing the time constant parameters in the delay circuit, the system can adapt to different switching time requirements without requiring a completely different circuit design, thus improving versatility while maintaining reasonable complexity.
2Speed
If the power switching apparatus switches frequently between main and auxiliary power, then it responds quickly to power failures, but it may cause system malfunction or failure
Solution Approach 1:
The patent applies preliminary action by using the delay circuit to anticipate and prevent premature switching. The delay circuit ensures that switching only occurs after a predetermined time threshold has been exceeded, preventing rapid or premature switching between power sources that could cause system instability, while still maintaining quick response to genuine power failures.
Solution Approach 2:
The delay circuit serves as a cushioning mechanism that prevents harmful rapid switching by introducing a time buffer. This beforehand cushioning protects the system from the harmful effects of frequent switching while maintaining the ability to respond quickly to sustained power failures, thus resolving the contradiction between switching speed and system reliability.
3Loss of time
If the power switching apparatus does not have delay control, then the switching operation is simple, but the switching time cannot be controlled to meet system requirements
Solution Approach 1:
The delay circuit acts as an intermediary element between the power failure detection and the switching operation. It provides precise time control by mediating the switching signal, ensuring that switching occurs at the appropriate moment. This intermediary function adds time control precision without requiring complex control logic, thus resolving the contradiction between time control precision and device complexity.
Data Source
AI summary
A power switching apparatus includes a detection circuit, a control circuit and an auxiliary power circuit. The detection circuit comprises a voltage adjusting unit, a delay unit, a first switch unit and an isolation unit. The auxiliary power circuit comprises an auxiliary power input side and an output side. When a main power supplies power normally or the main power stops supplying power but the delay unit continues working in a setting time, the first switch unit is turned on. The isolation unit sends a first signal to the control circuit. The auxiliary power input side does not conduct to the output side. When the main power stops supplying power and the delay unit stops working, the first switch unit is turned off. The isolation unit does not send the first signal to the control circuit. The auxiliary power input side conducts to the output side.