Power Supply Module for Switching Mode Control Circuit
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Solution Overview
Problem
Switching mode power supplies face inefficiencies and increased power loss in control circuits during light or open load conditions, as the conventional design fails to adequately supply voltage to the control circuit, leading to suboptimal operation and high power losses.
Innovation Solution
A power supply module comprising a switch circuit, a first supply module, a second supply module, and a determination module that dynamically adjusts power output to the control circuit by activating the switch circuit when in light or open load status, allowing the first supply module to supplement power and reduce losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the bias winding has fewer turns to increase main circuit efficiency, then the output voltage generated by the bias winding decreases, but the control circuit cannot operate normally because the voltage falls below the operating threshold
Solution Approach 1:
The power supply to the control circuit is segmented into two independent paths: a first power supply path using a first bias winding for normal operation, and a second power supply path using a second bias winding for light load conditions. This segmentation allows each path to be optimized for its specific operating condition, resolving the contradiction between efficiency and reliability.
Solution Approach 2:
The system dynamically switches between different power supply paths based on load conditions. A determination module detects whether the load is light or normal, and accordingly activates the appropriate power supply path. This dynamic adaptation allows the system to maintain both high efficiency under normal load and reliable control circuit operation under light load.
2Productivity
If the bias winding is designed for rated power output condition, then the efficiency at rated power is improved, but the efficiency under light load condition deteriorates due to increased control circuit power loss
Solution Approach 1:
Different bias windings are designed with different local qualities optimized for different operating conditions. The first bias winding is optimized for rated power output with appropriate turns ratio, while the second bias winding is specifically designed for light load conditions to generate sufficient voltage for control circuit operation. This local optimization resolves the contradiction between rated power efficiency and light load efficiency.
Solution Approach 2:
The system changes the operating parameters by switching between different power supply paths. Under rated load, the first power supply path operates with parameters optimized for high efficiency. Under light load, the system transitions to the second power supply path with different parameters (different bias winding turns ratio) that maintain adequate control circuit voltage, thereby reducing control circuit power loss and improving overall light load efficiency.
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 enhances the efficiency of the switching mode power supply by dynamically regulating power to the control circuit, reducing power loss and ensuring normal operation even under light or open load conditions.
Implementation Method 1
The power supply module comprises a switch circuit, a first supply module, a second supply module and a determination module. The first supply module is connected to the switch circuit, while the second supply module is connected to the switch circuit and connected to the first supply module in parallel.
Data Source
AI summary
A power supply module to power the control circuit of a switching mode power supply is provided. Based on the determination of whether the switching mode power supply is under a light or open load condition, the power supply module can dynamically provide the power to the control circuit of the switching mode power supply. Therefore, the performance of the power supply can be increased and the power loss can be decreased when the switching mode power supply is under a light or open load.