Parallel Power Supply Circuit Control for Low-Load EMI Efficiency
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Solution Overview
Problem
Conventional power supply apparatuses operating multiple power supply circuitries in parallel often result in inefficient power usage and poor Electromagnetic Interference (EMI) performance, especially when the required power level is low, as all circuitries consume power regardless of need, leading to reduced efficiency and increased noise.
Innovation Solution
A power supply apparatus with multiple power supply circuitries, each equipped with switching elements, is controlled by a processor to adjust the number of active circuitries based on the required power level, allowing for separate operation and optimizing power efficiency and EMI performance by reducing unnecessary power consumption and noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If all power supply circuitries are operated in parallel, then the power supply apparatus can supply sufficient power to the load, but power efficiency deteriorates when the required power level is low
Solution Approach 1:
The patent applies dynamics by making the number of operating power supply circuitries variable rather than fixed. The control unit dynamically adjusts the number of circuitries based on the required power level, transitioning between different operational states (one circuitry operating, two circuitries operating, or three circuitries operating in parallel) to optimize power efficiency while maintaining sufficient power supply capacity.
2Power
If all power supply circuitries are operated in parallel, then the power supply apparatus can meet high power demands, but EMI performance deteriorates due to increased noise
Solution Approach 1:
The patent applies dynamics by making the number of operating power supply circuitries variable rather than fixed. The control unit dynamically adjusts the number of circuitries based on the required power level, transitioning between different operational states (one circuitry operating, two circuitries operating, or three circuitries operating in parallel) to optimize power efficiency while maintaining sufficient power supply capacity.
Data Source
AI summary
Provided is a power supply apparatus that supplies power received from an external power supply to a load, the power supply apparatus comprising: a plurality of power supply circuitries, each of which has switching elements, that are allowed to supply power to the load separately; and a processor that controls a number of the power supply circuitries supplying power to the load according to a required power level of the load.