Parallel DC Power Supply Pattern Selection for Load Stability
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Solution Overview
Problem
Existing power supply devices experience instability in switching control due to discontinuity and current imbalance during pattern switching in DC voltage conversion units, leading to reduced control stability.
Innovation Solution
A power supply device with a selection unit and control unit that manage a conversion module with multiple units in parallel, allowing for pattern selection and operation number adjustment based on temperature and load distribution to maintain stability and equalize load across units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pattern switching is performed during operation of the converter, then load distribution among conversion units can be improved, but control stability deteriorates due to discontinuity and current imbalance
Solution Approach 1:
The control unit determines in advance whether to switch patterns before actual pattern switching occurs. By predicting future states and preparing switch timing ahead of time, the system minimizes disruption to control stability while achieving load distribution goals. The switch timing is determined based on predicted future states of conversion units, ensuring smooth transitions.
Solution Approach 2:
The system dynamically adjusts the operation number (number of driven conversion units) based on real-time temperature conditions. When temperature exceeds thresholds, the operation number is changed to reduce load on specific units. This dynamic adaptation allows the system to balance load distribution while maintaining control stability through continuous monitoring and adjustment.
2Reliability
If the number of driven conversion units is increased to improve redundancy and load distribution, then system reliability improves, but device complexity and control difficulty increase
Solution Approach 1:
The system changes the operation number parameter (number of driven conversion units) based on temperature conditions to optimize reliability. By dynamically adjusting this parameter, the system can switch between different redundancy levels and load distribution configurations without requiring complex control logic for each possible state. The ECU manages these parameter changes automatically based on simple temperature threshold comparisons.
Data Source
AI summary
A power supply device includes: a power supply mounted in an apparatus; a conversion module including a plurality of conversion units configured to perform voltage conversion of power supplied by the power supply, the plurality of conversion units being electrically connected in parallel to each other; a selection unit that selects one of a plurality of patterns indicating a combination of the conversion units performing the voltage conversion for each operation number, which is the number of the conversion units performing the voltage conversion; and a control unit that controls the conversion module such that the conversion unit indicated by the pattern selected by the selection unit performs the voltage conversion. The selection unit changes the selected pattern with an operation on the switch. In the plurality of patterns, the combination of the conversion units performing the voltage conversion in at least one of the operation numbers is different.