LLC Power Supply Voltage Control for Gain and Efficiency Balance
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Solution Overview
Problem
Existing power supply designs face challenges in balancing efficiency and gain in LLC architecture, particularly with the increasing popularity of power delivery models that require adjustable output voltages, leading to inefficiencies when trying to maintain high efficiency and voltage gain simultaneously.
Innovation Solution
A power supply apparatus with step-up and step-down conversion capabilities, incorporating a primary-side rectifying/filtering circuit, step-up converter, full-bridge LLC converter, primary-side and secondary-side controllers, and a voltage regulator, which allows for flexible adjustment of output voltage while maintaining high voltage gain and efficiency through feedback control signals and mode operations of the step-up and step-down converters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the output voltage is adjusted to meet PD model requirements, then the adaptability is improved, but the conversion efficiency decreases
Solution Approach 1:
The patent implements dynamic operation modes for the LLC converter, switching between full-bridge mode and half-bridge mode based on real-time voltage and power requirements. This dynamic adaptation allows the system to maintain high conversion efficiency across different output voltage levels while meeting PD model adjustability requirements
Solution Approach 2:
The patent changes the operating parameters of the LLC converter by adjusting the gain conditions and switching between different bridge configurations. By modifying these parameters dynamically, the system achieves both output voltage adjustability and maintains optimal conversion efficiency in different operating ranges
2Power
If the gain is increased to meet voltage requirements, then the voltage gain is improved, but the conversion efficiency decreases
Solution Approach 1:
The patent dynamically adjusts the LLC converter operation between full-bridge and half-bridge modes based on real-time voltage requirements. This dynamic approach optimizes the voltage gain while maintaining high conversion efficiency by selecting the appropriate operating mode for each specific condition
Solution Approach 2:
The patent segments the operating range into different gain conditions, with the primary-side controller dividing the conversion process into distinct operational phases. This segmentation allows optimized control strategies for different voltage gain requirements, preventing efficiency degradation
3Loss of energy
If a fixed high-voltage output is maintained, then the conversion efficiency is improved, but the adaptability to different power delivery models decreases
Solution Approach 1:
The patent implements a dynamic output voltage regulation system where the secondary-side controller adjusts the output voltage based on power demand signals from the load. This dynamic regulation maintains high efficiency by operating in optimized modes while providing the flexibility required by different PD models
Solution Approach 2:
The patent employs feedback control mechanisms where the secondary-side controller receives power demand signals and adjusts the primary-side controller's operation accordingly. This feedback loop enables adaptive output voltage adjustment while maintaining optimal conversion efficiency through coordinated control
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 flexible adjustment of output voltage while achieving higher voltage gain and better conversion efficiency, addressing the inefficiencies in traditional designs by optimizing the operation of step-up and step-down converters within the LLC architecture.
Implementation Method 1
the step-up converter to step up the DC input voltage into a step-up voltage
Implementation Method 2
the full-bridge LLC converter to convert the step-up voltage into a conversion voltage according to at least one gain condition
Implementation Method 3
rectifies and filters the AC input voltage into a DC input voltage
Data Source
AI summary
A power supply apparatus with step-up and step-down conversion includes a primary-side rectifying/filtering circuit, a step-up converter, a full-bridge LLC converter, a primary-side controller, a secondary-side rectifying/filtering circuit, a voltage regulator, and a secondary-side controller. The primary-side rectifying/filtering circuit rectifies and filters an AC input voltage into a DC input voltage. The primary-side controller controls the step-up converter to step up the DC input voltage to a step-up voltage, and controls the full-bridge LLC converter to convert the step-up voltage to a conversion voltage. The secondary-side rectifying/filtering circuit rectifies and filters the conversion voltage into a DC output voltage. The secondary-side controller controls the primary-side controller to provide the step-up control signal and the conversion control signal and provides a voltage regulation signal to control the voltage regulator so as to regulate the DC output voltage to an output voltage for supplying power to the load.