Multi-Power Supply System With Controllable Switching Unit
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Solution Overview
Problem
Existing multi-power supply systems face challenges in achieving reliability and flexibility, particularly in ensuring power balance and utilizing internal devices effectively while maintaining low costs, especially when one input circuit malfunctions.
Innovation Solution
A multi-power supply system with a controllable switching unit that coordinates power supply between multiple units, using reverse current prevention circuits and converter circuits to ensure power balance and switch between inputs, allowing normal units to supply power to the load even when one input is abnormal, and designing converters based on half load plus a margin to reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual-input power supply redundancy design is adopted to ensure reliability, then system reliability is improved, but device complexity increases and internal devices cannot be fully utilized
Solution Approach 1:
The switching unit enables the power supply system to perform multiple functions: normal dual-input operation and abnormal single-input operation. The same converter circuits serve both redundancy mode and full-load mode, making the system universal and avoiding the need for separate circuit designs for different operating conditions.
Solution Approach 2:
The system dynamically switches between different operating modes based on the status of input circuits. The switching unit changes its state according to whether inputs are normal or abnormal, allowing the system to adapt its configuration and optimize device utilization in real-time.
2Reliability
If converter circuits are designed for full load capacity to ensure reliability, then power supply capability is improved, but cost increases
Solution Approach 1:
The system changes its operating parameters based on input status. When one input is abnormal, the switching unit reconfigures the system to operate with the remaining normal input supplying the full load. This allows converter circuits to be designed for half-load plus margin rather than full-load redundancy, optimizing cost while maintaining reliability.
3Reliability
If multiple power supply units operate independently to ensure reliability, then system reliability is improved, but device utilization rate decreases
Solution Approach 1:
The switching unit merges the power supply paths by allowing a single normal input to supply power to multiple converter circuits when one input is abnormal. This combining of power paths increases device utilization while maintaining system reliability through the switching mechanism.
Data Source
AI summary
A multi-power supply system and a control method thereof are disclosed. The multi-power supply system includes a first power-supply unit, a second power-supply unit, a switching unit, and a control unit. The power-supply unit comprises a reverse current prevention circuit, a converter circuit, and an input circuit. The switching unit is electrically coupled to the first power-supply unit and the second power-supply unit. When the first and second input circuits are in normal operation, the control unit controls the switching unit to be turned off to allow the first power-supply unit and the second power-supply unit to supply power to a load. When one of the first and second input circuits is in abnormal operation, the control unit controls the switching unit to be turned on. The switching unit cooperates with the first and second reverse current prevention circuits to achieve the switching of input.