Multi-order resonant circuit holding-up time
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Solution Overview
Problem
Conventional power supply devices provide insufficient holding-up time during voltage dips or short interruptions, failing to meet the requirements set by the International Electro Technical Commission.
Innovation Solution
A power supply device incorporating a multi-order resonant circuit, a transformer, and an output stage circuit, which generates a switching voltage and transformation voltage to increase output stability by selectively closing and opening current paths based on control voltages, thereby extending holding-up time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a conventional power supply device is used, then the device structure is simple, but the holding-up time during voltage dips or short interruptions is insufficient
Solution Approach 1:
The power supply device is segmented into multiple functional modules: input stage circuit, multi-order resonant circuit with first and second current paths, controller, transformer, and output stage circuit. Each module performs a specific function, allowing the system to achieve extended holding-up time through coordinated operation while maintaining manageable complexity through modular design.
Solution Approach 2:
The multi-order resonant circuit is configured to preliminarily store energy and maintain voltage levels before complete power failure occurs. The first and second current paths are designed to be selectively activated based on the severity of voltage dips, providing preliminary protection and extending the holding-up time before the output voltage collapses.
2Stability of the object's composition
If the holding-up time is extended using conventional methods, then the output stability improves, but the device complexity increases
Solution Approach 1:
The multi-order resonant circuit serves multiple functions: it provides voltage boosting during voltage dips, extends holding-up time during short interruptions, and maintains output stability under varying load conditions. The controller universally manages both current paths and coordinates with the transformer to achieve stable output across different fault scenarios, reducing the need for separate dedicated circuits for each function.
Solution Approach 2:
The transformer acts as an intermediary between the resonant circuit and the output stage, isolating the complex resonant circuitry from the output load while transferring energy. This intermediary allows the system to achieve output stability without directly exposing the output to the complexity of the multi-order resonant circuit, as the transformer provides galvanic isolation and voltage transformation.
3Stability of the object's composition
If a simple power supply circuit is used, then the device complexity is low, but the output stability during voltage dips deteriorates
Solution Approach 1:
The power supply device employs dynamic control through the controller that selectively activates the first and second current paths based on real-time detection of voltage dip severity. The system transitions from a static conventional circuit to a dynamic configuration where circuit topology changes in response to input conditions, enabling stable output during voltage dips without requiring a permanently complex circuit structure.
4Reliability
If the holding-up time is increased, then the reliability during short interruptions improves, but the device complexity increases
Solution Approach 1:
The multi-order resonant circuit maintains continuous useful action by seamlessly transitioning between the first and second current paths based on the duration and severity of voltage dips or short interruptions. This continuity ensures reliable power delivery throughout the entire disturbance event without gaps, achieving high reliability during short interruptions while avoiding the need for multiple separate backup systems that would increase complexity.
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 proposed power supply device significantly increases holding-up time and meets IEC requirements, ensuring higher output stability and preventing circuit overload, making it suitable for various electronic devices.
Implementation Method 1
The multi-order resonant circuit provides a reference voltage at a first node. The multi-order resonant circuit includes a first current path and a second current path. The first node is respectively coupled through the first current path and the second current path to a ground voltage. The first current path is selectively closed or open according to the first control voltage. The second current path is selectively closed or open according to the second control voltage.
Implementation Method 2
The transformer generates a transformation voltage according to the voltage difference between the switching voltage and the reference voltage.
Data Source
AI summary
A power supply device includes an input stage circuit, a controller, a multi-order resonant circuit, a transformer, and an output stage circuit. The input stage circuit generates a switching voltage according to an input voltage. The controller generates a first control voltage and a second control voltage according to the switching voltage. The multi-order resonant circuit provides a reference voltage at a first node. The multi-order resonant circuit includes a first current path and a second current path. The first node is respectively coupled through the first current path and the second current path to a ground voltage. The first current path and the second current path are selectively closed or open according to the first control voltage and the second control voltage. The output stage circuit generates an output voltage according to the transformation voltage of the transformer.