Power Failure Prevention System Using Buck-Boost Switching
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Solution Overview
Problem
Power failures in electronic devices and production lines can cause significant inconvenience and financial losses due to the inability to maintain stable power supply, leading to potential errors in executing programs and requiring re-execution upon power restoration.
Innovation Solution
A power failure prevention system comprising a switch circuit, energy storage circuit, voltage detector circuit, and control circuit that operates in buck, buck-boost, and boost modes to charge and discharge energy, ensuring continuous power supply to circuit components by switching between input voltage and stored voltage based on detected thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple power supply system is used, then device complexity is reduced, but power supply stability deteriorates when power failures occur
Solution Approach 1:
The energy storage circuit pre-stores electrical energy during normal operation before power failure occurs. This preliminary energy accumulation enables the system to maintain power supply to critical components during power failures without requiring complex real-time switching mechanisms or additional backup power sources.
2Reliability
If an energy storage circuit is added to maintain power during failures, then power supply reliability is improved, but device complexity increases
Solution Approach 1:
The energy storage circuit serves multiple functions: it stores energy during normal operation, provides backup power during failures, and can be controlled to discharge at specific times. This multi-functionality reduces the need for separate dedicated backup power systems, thereby limiting the increase in overall system complexity while maintaining improved reliability.
3Reliability
If voltage detection and control circuits are added to manage charging/discharging, then power supply stability is improved, but device complexity increases
Solution Approach 1:
The voltage detection circuit continuously monitors the voltage state of the energy storage circuit and provides feedback to the control circuit. This feedback mechanism enables automatic control of charging and discharging operations, ensuring power supply stability while using a relatively simple control structure that responds dynamically to voltage conditions without requiring complex predictive algorithms or multiple control layers.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively maintains power supply to circuit components, preventing errors during power failures by using stored voltage to execute unfinished programs, eliminating the need for re-execution upon power restoration.
Implementation Method 1
A node between the first switch and the second switch is connected to a node between the third switch and the fourth switch through an inductor
Implementation Method 2
The energy storage circuit is connected to a first terminal of the third switch
Data Source
AI summary
A power failure prevention system includes a switch circuit, an energy storage circuit, a voltage detector circuit and a control circuit. The switch circuit includes a first switch, a second switch, a third switch and a fourth switch. The energy storage circuit is connected to the switch circuit. The voltage detector circuit detects an input voltage provided by an input voltage source and a stored voltage of the energy storage circuit. The control circuit controls the switch circuit according to the detected input voltage and stored voltage. When the input voltage is higher than a first threshold, the switch circuit allows the input voltage to charge the energy storage circuit. When the input voltage is lower than a second threshold, the switch circuit allows the stored voltage to discharge to the input voltage source. The first threshold is higher than the second threshold.