Adaptive Voltage Compensation in Active Clamp Flyback Power Supplies
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Solution Overview
Problem
Existing power supplies lack adaptive adjustable frequency range of voltage compensation, failing to optimize power reduction across different operating modes.
Innovation Solution
A power supply with a noise suppression circuit, boost active PFC circuit, active clamp flyback converting circuit, and voltage-stabilizing feedback compensation circuit, controlled by a control circuit to adjust frequency ranges based on operational modes for optimized power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single frequency range of voltage compensation is used based on maximum loading rate, then the power supply can meet the requirement of power-saving specification, but it is unable to achieve optimized power reduction when operating in different modes
Solution Approach 1:
The patent implements dynamic adjustment of the voltage compensation frequency range by switching between a first frequency range for high loading rates and a second frequency range for low loading rates. The control circuit dynamically selects the appropriate frequency range based on the current operational mode, enabling the system to adapt to different loading conditions while optimizing power consumption without excessive complexity
Solution Approach 2:
The patent changes the frequency range parameter of the voltage compensation mechanism based on loading rate. When the loading rate exceeds a threshold, the system uses the first frequency range; when it falls below the threshold, the system switches to the second frequency range. This parameter adjustment enables optimized power reduction across different operational modes
2Use of energy by moving object
If voltage-stabilizing feedback compensation is adopted to meet power-saving specifications, then power consumption is reduced, but the system lacks optimization capability across different operational modes
Solution Approach 1:
The system dynamically adjusts the voltage compensation frequency range based on real-time loading rate detection. The control circuit switches between first and second frequency ranges to optimize power consumption in different operational modes, achieving both power-saving goals and adaptive optimization
Solution Approach 2:
The patent employs voltage-stabilizing feedback compensation with dynamic frequency range selection. The control circuit continuously monitors the loading rate and adjusts the compensation frequency range accordingly, creating a closed-loop feedback system that optimizes power consumption while maintaining voltage stability across different operational modes
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
Enables efficient power conversion and stabilization across varying load conditions, reducing power consumption by adapting voltage compensation mechanisms to different operational modes.
Implementation Method 1
The noise suppression circuit is configured to filter noises in the AC voltage for providing a processed AC voltage
Implementation Method 2
The boost active PFC circuit is configured to convert the processed AC voltage into a DC voltage and then convert the DC voltage into a first pulse DC voltage
Implementation Method 3
The active clamp flyback converting circuit is configured to convert the first pulse DC voltage into the output voltage and provide a detecting voltage associated with the output voltage
Implementation Method 4
The voltage-stabilizing feedback compensation circuit is configured to perform voltage stabilization to the output voltage selectively using a first voltage-stabilizing feedback compensation range or a second voltage-stabilizing feedback compensation range
Data Source
AI summary
A power supply includes a noise suppression circuit, an active power factor correction circuit, an active clamp flyback conversion circuit, a voltage-stabilizing feedback compensation circuit, and a control circuit. The active power factor correction circuit and the active clamp flyback conversion circuit convert an AC voltage into an output voltage for driving a load. The voltage-stabilizing feedback compensation circuit performs voltage-stabilizing feedback compensation to the output voltage. The active clamp flyback conversion circuit switches its operational mode based on the instantaneous output loading of the power supply. The control circuit controls the operation of the voltage-stabilizing feedback compensation circuit based on the operational mode of the active clamp flyback conversion circuit, thereby adjusting the equivalent capacitance of the voltage-stabilizing feedback compensation circuit for providing a corresponding voltage-stabilizing feedback compensation range associated with the instantaneous output loading of the power supply.