Single Transformer Multi-Output Power Supply with Conjugate Inductors
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Solution Overview
Problem
Conventional multi-output power supply apparatuses have high production costs, occupy large space, suffer from reduced power generation efficiency due to core loss from multiple transformers, and experience temperature issues leading to shortened lifespan, along with voltage offset problems during load changes.
Innovation Solution
A power supply apparatus utilizing a single transformer and single feedback circuit configuration, with conjugate energy-storing inductors and rectifying/filtering circuits to generate multiple voltage outputs, employing insulated wiring and independent reference terminals for isolation and efficient power conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transformers are used to implement multi-output power supply configuration, then multiple voltage outputs can be achieved, but production costs increase and space occupation increases
Solution Approach 1:
The patent merges multiple transformer functions into a single transformer by winding multiple secondary windings (first secondary winding and second secondary winding) on the same transformer core. This single transformer with multiple secondary windings can provide multiple isolated voltage outputs, replacing what would traditionally require multiple separate transformers, thereby reducing device complexity and space occupation while maintaining multi-output capability.
Solution Approach 2:
The single transformer is designed to perform multiple functions simultaneously by providing both a first secondary winding for one output voltage and a second secondary winding for another output voltage. This multi-functional design allows one transformer to replace multiple transformers, reducing production costs and space requirements while achieving the same multi-output power supply configuration.
2Adaptability or versatility
If multiple transformers are used to implement multi-output power supply configuration, then multiple voltage outputs can be achieved, but power generation efficiency is reduced due to core loss
Solution Approach 1:
By combining multiple transformer functions into a single transformer with multiple secondary windings, the patent reduces the total number of transformer cores from multiple to one. This eliminates the redundant core losses that would occur in multiple separate transformers, thereby improving power generation efficiency while maintaining the ability to provide multiple isolated voltage outputs.
3Adaptability or versatility
If multiple transformers are used to implement multi-output power supply configuration, then multiple voltage outputs can be achieved, but internal temperature increases and lifespan is shortened
Solution Approach 1:
The patent consolidates multiple transformer operations into a single transformer, which distributes the thermal load more efficiently. By having multiple secondary windings on one transformer rather than multiple separate transformers, the internal temperature is better managed, preventing the excessive heat generation that would occur with multiple transformers operating simultaneously, thereby extending the power supply apparatus lifespan.
4Adaptability or versatility
If conventional multi-output power supply apparatus is used, then multiple voltage outputs can be provided, but voltage offset is generated during load switching
Solution Approach 1:
The patent introduces a conjugate energy-storing inductor as an intermediary component between the single transformer and the multiple output circuits. This inductor acts as a mediator that decouples the load switching operations from the voltage outputs, preventing voltage offset. When one load switches between light and heavy, the energy-storing inductor absorbs or releases energy to maintain stable voltage on both outputs, eliminating the interference that would otherwise occur in conventional multi-transformer designs.
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
This configuration reduces costs, enhances power generation efficiency, prevents output voltage interference, and extends lifespan by using a single transformer to produce multiple isolated output voltages effectively.
Implementation Method 1
The primary winding is coupled to the power conversion circuit, and the first and second secondary windings respectively induce a corresponding voltage based on a voltage of the primary winding
Implementation Method 2
The first and the second conjugate coils respectively charges and discharges in response to the voltage induced by the first and the second secondary windings
Data Source
AI summary
A power supply apparatus including a power conversion circuit, a single transformer, a conjugate energy-storing inductor and a first and a second rectifying and filtering circuit is provided. The single transformer has a primary winding, a first secondary winding and a second secondary winding. The primary winding is coupled to the power conversion circuit and the first and second secondary windings respectively induce a corresponding voltage based on a voltage of the primary winding. The conjugate energy-storing inductor has a first and a second conjugate coil isolated from each other. The first and second rectifying and filtering circuits respectively charges/discharges in response to the voltage induced by the first and second rectifying and filtering circuits, and thereby respectively provides a first and a second output voltage via the output terminals of the first and second rectifying and filtering circuits.