Multi-Unit Power Supply System Optimizing Conversion Efficiency
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Solution Overview
Problem
Existing power supply systems face inefficiencies in power conversion due to variations in load, with low load ranges experiencing power consumption losses and high load ranges encountering impedance, iron, and copper losses, necessitating a method to optimize output power adjustment across multiple power supply units.
Innovation Solution
A power supply system comprising multiple units with a power measurement unit and a control unit that calculates and adjusts optimal output power to minimize input power, using an input-output conversion model to optimize power conversion efficiency based on measured output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of power supply units is increased to handle high load ranges, then power conversion efficiency deteriorates due to impedance, iron loss, and copper loss, but power supply capacity is improved
Solution Approach 1:
The power supply system is divided into multiple independent power supply units, each capable of operating autonomously. This segmentation allows the system to selectively activate only the necessary number of units based on load requirements, avoiding the energy losses associated with operating excess units at high load ranges.
Solution Approach 2:
The system dynamically adjusts the operating state of power supply units based on real-time load conditions. The control unit monitors output power and automatically switches power supply units on or off to match the required power level, ensuring optimal efficiency across varying load ranges while maintaining adequate power supply capacity.
2Power
If power supply units are operated in low load ranges, then power supply capacity is maintained, but power conversion efficiency deteriorates due to power consumption necessary to drive the power supply apparatus itself
Solution Approach 1:
The control unit continuously monitors the load and dynamically adjusts the number of active power supply units. When load demand is low, the system reduces the number of operating units to minimize idle power consumption, while still maintaining adequate power supply capacity to handle potential load increases.
Solution Approach 2:
The system changes the operational parameters by switching between different numbers of active power supply units based on load conditions. This parameter change allows the system to optimize efficiency in low load ranges by reducing the number of operating units, while preserving the capability to provide sufficient power when needed.
3Loss of energy
If output power of individual power supply units is adjusted to optimize power conversion efficiency, then energy efficiency is improved, but control complexity increases
Solution Approach 1:
The control unit implements a feedback mechanism that monitors the output power of each power supply unit and automatically adjusts the number of active units based on the measured load. This feedback-based approach simplifies control complexity by using automatic switching decisions rather than complex continuous adjustment mechanisms, while still achieving optimal power conversion efficiency.
Data Source
AI summary
A power supply system controls output powers of a plurality of power supply apparatus for realizing optimal conversion efficiency between input power and output power. The power supply system includes a plurality of power conversion units that convert an input power supplied from the input side into an output power for supplying the output power to a load connected to the output side; a power measurement unit that measures the output power of the power conversion unit; and a power supply control unit that calculates the input power to the power conversion unit in response to the output power of the power conversion units measured by the power measurement unit, and calculates the output power of the power conversion unit realizing the minimum calculated input power as an optimal output power, and controls the power conversion units based on the calculated optimal output power.