Power Supply Unit With Integrated DC Link Energy Storage
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Solution Overview
Problem
Existing power supply units with uninterrupted power supply (UPS) circuits are costly due to the need for two separate controlled units: a standard power supply unit and a DC UPS, which include components like capacitors or accumulators that require additional charging circuits and switching controllers.
Innovation Solution
A power supply unit with a DC link between a DC-DC converter and output switching controllers, where an energy storage module is connected directly to the DC link, eliminating the need for a charging circuit and allowing for easy attachment and detachment of energy storage modules, and using a resonance converter with a fixed transformation ratio for efficient voltage regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard power supply unit is connected to a DC UPS with capacitors or accumulators, then uninterrupted power supply is achieved, but implementation costs increase due to requiring two controlled units and additional charging circuits
Solution Approach 1:
The patent combines the power supply unit and DC UPS functions into a single integrated device. The energy storage module (capacitor or accumulator) is integrated within the power supply unit itself, eliminating the need for a separate DC UPS device. This merging reduces implementation costs by removing the need for two separate controlled units while maintaining uninterrupted power supply capability through the integrated energy storage and switching circuitry.
2Duration of action of moving object
If a DC UPS with switching controllers is used to bridge network failures, then power continuity is maintained, but device complexity increases due to additional charging circuits and switching controllers
Solution Approach 1:
The switching controller is integrated within the power supply unit rather than being a separate component. The energy storage module is directly connected to the output of the power supply unit, and the switching controller manages both the normal power flow and the transition to battery power seamlessly. This integration maintains network failure bridging capability while reducing device complexity by eliminating separate charging circuits and switching controllers.
Solution Approach 2:
The switching controller is designed to perform multiple functions: it operates as a standard power supply controller during normal operation and automatically switches to battery power supply mode during network failures. This multi-functionality eliminates the need for separate dedicated switching controllers for different operating modes, thereby reducing overall device complexity while maintaining continuous power supply capability.
3Duration of action of moving object
If accumulators are used in DC UPS, then network failure bridging is possible, but the number of cells required increases complexity
Solution Approach 1:
The patent employs an extra-low-voltage DC link architecture with voltage levels between 12 V and 48 V, which allows the use of fewer accumulator cells compared to traditional high-voltage systems. By changing the voltage parameter to a lower range, the system achieves the same energy storage capacity with fewer cells, thereby reducing device complexity while maintaining the required network failure bridging time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces implementation costs, allows for flexible extension of network failure bridging time, and achieves high efficiency by using a single DC link with extra-low-voltage, enabling efficient power supply to loads with varying DC voltages, and can handle power peaks without additional switching.
Implementation Method 1
DC-DC converter on the input side
Implementation Method 2
a capacitor (FIG. 1) or accumulators (FIG. 2) are used as energy stores
Implementation Method 3
a capacitor (FIG. 1) or accumulators (FIG. 2) are used as energy stores
Implementation Method 4
a step-down or step-up switching controller ensures that the consumed capacitor voltage is converted to the prescribed output DC voltage
Data Source
AI summary
A power supply unit having a circuit for uninterrupted power supply comprises a first DC-DC converter arranged on the input side, at least one output configured for outputting an output DC voltage, and at least one first output switching controller. A DC link is arranged between the first DC-DC converter and the at least one output switching controller for regulating the at least one output DC voltage on the output side. The first DC link is connected to an energy storage module.