Power Supply Transformer Winding Segmentation for Synchronization
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Solution Overview
Problem
Existing power supplies for flat panel displays, such as SMPS, face challenges in miniaturization and efficient multi-power supply management, particularly in synchronizing output powers with the switching period of input power and controlling average power output from a single transformer unit.
Innovation Solution
A power supply system comprising a power input unit, a transformer unit, a first power output unit, a second power output unit, a synchronization signal detecting unit, and a synchronization signal output unit, which synchronizes the switching period of the second power output unit with the input power switching period, allowing for synchronized multi-power supply and controlled average power output from a single transformer unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single transformer unit is used to supply multiple powers, then device complexity is reduced, but it becomes difficult to synchronize output powers with the switching period of input power
Solution Approach 1:
The secondary coil is divided into multiple independent winding units (first, second, third winding units), each capable of providing a separate output power. This segmentation allows each output to be independently controlled and synchronized with the input switching period while using a single transformer unit, thus reducing device complexity without sacrificing synchronization capability.
Solution Approach 2:
The synchronization control unit detects the switching period of the input power and uses this feedback information to control the switching timing of each output power. By continuously monitoring and adjusting based on the input switching period, the system maintains reliable synchronization across all output powers from the single transformer unit.
2Adaptability or versatility
If multiple output powers are provided from a single transformer, then adaptability is improved, but controlling average power output becomes difficult
Solution Approach 1:
The system provides dynamic control over multiple output powers by independently adjusting the switching timing of each winding unit based on the detected input switching period. This dynamic adjustment capability allows flexible control of average power output for each of the multiple powers supplied, enhancing both adaptability and ease of operation.
Solution Approach 2:
The synchronization control unit预先 detects the switching period of the input power before controlling the output switching. This preliminary detection allows the system to pre-calculate and set the appropriate switching timing for each output power, making average power control more straightforward and easier to operate while maintaining multi-power supply capability.
3Device complexity
If the second power output unit operates asynchronously, then device complexity is reduced, but voltage variation and current ripple increase
Solution Approach 1:
The synchronization control unit uses feedback from the detected input switching period to control the switching timing of the second power output unit. This feedback mechanism ensures that the second output operates in synchronization with the input, thereby reducing voltage variation and current ripple while maintaining relatively simple device complexity through a unified transformer structure.
Solution Approach 2:
The system implements periodic switching action for the second power output unit that is synchronized with the periodic nature of the input power switching. By aligning the switching periods, the system achieves stable voltage and current characteristics without requiring complex asynchronous control mechanisms.
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 solution enables efficient and stable power supply by minimizing voltage variation and reducing current ripple, effectively managing load variations and ensuring stable operation across different load conditions.
Implementation Method 1
a transformer unit inducing an output power of the power input unit to a secondary side
Data Source
AI summary
A power supply is provided. The power supply comprises: a power input unit switching an input power; a transformer unit inducing an output power of the power input unit to a secondary side; a first power output unit connected to a first coil of the secondary side of the transformer unit; a second power output unit connected to a part of the first coil of the secondary side of the transformer unit; a synchronization signal detecting unit connected to a third coil of the secondary side of the transformer unit and detecting a switching period of the power input unit; and a synchronization signal output unit controlling an operation of the second power output unit according to the detected signal of the synchronization signal detecting unit.