Integrated Power Factor Correction for Multi-Output Supplies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power factor correction circuits require multiple signal sensing stages, input bridge rectifier stages, and input filter stages, which increase complexity and cost, and do not efficiently achieve high power factors and low current total harmonic distortion in multiple-output power supplies.
Innovation Solution
A multiple-output integrated power factor correction system that uses a processor to monitor voltage outputs of multiple stages, generate individual and combined error signals, and control input current waveform based on input voltage, reducing the need for additional signal sensing stages and using a single current sensing signal to control multiple output voltage sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple signal sensing stages, input bridge rectifier stages, and input filter stages are used in conventional power factor correction circuits, then the power supply can regulate input current and output voltage, but the circuit complexity and cost increase linearly with the number of output stages
Solution Approach 1:
The patent combines multiple sensing stages into a single integrated sensing circuit that monitors all output voltages simultaneously. The processor integrates control of multiple output stages through a unified control algorithm that processes error signals from all outputs and generates coordinated control signals, reducing the overall circuit complexity while maintaining regulation reliability.
Solution Approach 2:
The processor serves multiple functions: it monitors all output voltages, generates individual error signals for each output, implements the control algorithm, and produces control signals for multiple power factor correction stages. This multi-functional approach eliminates the need for separate dedicated control circuits for each output stage.
2Loss of energy
If conventional power factor correction circuitry is used with multiple output stages, then power supply efficiency is improved, but achieving high power factors and low current total harmonic distortion becomes increasingly difficult
Solution Approach 1:
The system implements a feedback control mechanism where the processor continuously monitors output voltages, compares them with reference values to generate error signals, and adjusts the control signals for each power factor correction stage accordingly. This closed-loop feedback enables precise control of power factor and harmonic distortion across multiple output stages.
Solution Approach 2:
The control algorithm dynamically adjusts the operation of each power factor correction stage based on real-time output conditions. The processor modifies control signals adaptively to maintain optimal power factor and minimize harmonic distortion, allowing the system to respond to changing load conditions and maintain high efficiency.
3Reliability
If additional signal sensing stages are added to control each output voltage source independently, then output voltage regulation is improved, but the number of terminals and circuit components increases linearly
Solution Approach 1:
A single integrated sensing circuit performs the function of multiple separate sensing stages by monitoring all output voltages simultaneously. The processor processes information from all outputs and generates coordinated control signals, eliminating the need for separate dedicated sensing and control circuits for each output stage, thereby reducing the number of terminals and components.
Solution Approach 2:
The patent merges multiple sensing functions into one integrated sensing circuit and combines multiple control functions into a single processor. This consolidation reduces the total number of circuit components and terminals while maintaining the capability to independently regulate each output voltage through coordinated control.
Data Source
AI summary
A multiple-output integrated power factor correction system includes, for example, a processor that is formed in a substrate and is arranged to monitor each voltage output of two or more output stages of a power supply and in response to generate an individual voltage error signal for each monitored output stage. A combined output voltage error signal is generated in response to each of the individual voltage error signals. The voltage input to the power supply and the total inductor current of the power supply are monitored and used to generate a combined output voltage control signal in response to the monitored input voltage total inductor current as well as the combined output voltage error control signal. Each individual output voltage control signal for each monitored output stage is generated in response to each of the respective generated individual voltage error signals.