Multi-Output Power Supply Apparatus with Single Transformer
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Solution Overview
Problem
Conventional current source type power supply apparatuses with multiple outputs suffer from heavy losses and complex structures due to the need for multiple transformers and regulator chips to control voltage outputs, which hinders the simplicity and efficiency of the power supply system.
Innovation Solution
A power supply apparatus with multiple outputs is designed, featuring a transformer with multiple secondary coils, each connected to an output circuit, where a second output controller uses a switch and feedback mechanisms to individually control output voltages, reducing power losses and maintaining a simple configuration by eliminating the need for additional transformers and regulator chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transformers and regulator chips are used to control voltage outputs in conventional current source type power supply apparatuses, then multiple output voltages can be controlled, but the structure becomes complex and power losses increase
Solution Approach 1:
The patent merges multiple output control functions into a single transformer by providing multiple secondary coils with different turns ratios. Instead of using separate transformers and regulator chips for each output, the invention combines them into one integrated transformer structure where each secondary coil can independently provide a different output voltage through its specific turns ratio, thereby reducing overall device complexity while maintaining multiple output control capability
Solution Approach 2:
The single transformer in the invention performs multiple functions simultaneously - it provides multiple different output voltages through its multiple secondary coils, each with different turns ratios. This multi-functional design eliminates the need for separate dedicated transformers and regulator chips for each output, achieving versatility in voltage control without increasing structural complexity
2Adaptability or versatility
If multiple transformers and regulator chips are used in conventional power supply apparatuses, then multiple output voltages can be controlled, but power losses increase
Solution Approach 1:
By merging multiple output control functions into a single transformer with multiple secondary coils, the invention reduces the total number of components that would otherwise be separate. This consolidation eliminates redundant power conversion stages and reduces cumulative power losses that would occur across multiple separate transformers and regulator chips, while still achieving multiple different output voltage control
3Device complexity
If a simple structure is used in power supply apparatuses, then the apparatus size is reduced, but individual control of multiple output voltages becomes difficult
Solution Approach 1:
The invention segments the transformer into multiple secondary coils, where each coil is independently wound with a specific turns ratio. This segmentation allows each secondary coil to independently control its output voltage through its dedicated switching element, achieving individual output control while maintaining the simplicity of a single integrated transformer structure rather than requiring multiple separate power supply units
4Adaptability or versatility
If multiple transformers are used in conventional power supply apparatuses, then multiple output voltages can be provided, but the apparatus size increases
Solution Approach 1:
The invention merges what would traditionally require multiple separate transformers into a single integrated transformer structure with multiple secondary coils. This consolidation significantly reduces the total volume occupied by magnetic components and associated circuitry, while still providing multiple different output voltages through the different turns ratios of the secondary coils, thereby reducing apparatus size while maintaining versatility
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 design allows for efficient, individually controlled output voltages across multiple secondary circuits, reducing power losses and maintaining a compact, simple structure, thereby enhancing the overall efficiency and reducing costs.
Implementation Method 1
A circuit as illustrated in FIG. 1 is known as a flyback converter and is a type of DC/DC converter. Referring to FIG. 1, the current source type power supply apparatus includes a transformer T having a predetermined turns ratio, a primary circuit 10 connected to a primary coil of the transformer T
Implementation Method 2
When the control switch S included in the primary circuit 10 is turned on, a voltage having an opposite polarity to that of the primary coil is induced in the secondary coil of the transformer T, so that the diode D of the rectifier 21 is in a reverse bias state. Therefore, a current flow to the secondary circuit 20 is blocked. Simultaneously, a magnetic inductance of the transformer T is charged with energy.
Data Source
AI summary
A power supply apparatus having multiple outputs, a transformer, a first output circuit generating a first output voltage with respect to power transferred to a secondary side of the transformer, and a first output controller generating a first control signal to control a power supply provided to a primary side of the transformer, the apparatus including: a second output circuit to generate a second output voltage with respect to the power transferred to the secondary side of the transformer; and a second output controller to control an output of the second output voltage, wherein the second output circuit includes a second switch performing a switching operation on current flows of the second output circuit, and the second output controller controls the switching operation of the second switch by turning off the second switch or feeding the second output voltage back to the second switch according to the first control signal.