Uninterruptible Power Apparatus with DC/DC Extraction
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Solution Overview
Problem
Existing uninterruptible power operating apparatuses face inefficiencies and higher costs due to time delays in switching during power interruptions, energy loss in multi-stage power conversion, and the need for additional components like EPS ports and thicker wires for low voltage backup energy usage.
Innovation Solution
An uninterruptible power operating apparatus with a driving circuit that rapidly receives DC energy from an energy storage element when AC power is interrupted, utilizing a DC/DC converting circuit and a switching element to maintain efficient energy conversion and reduce costs by eliminating the need for additional ports and thicker wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a triple ends switch element is used to switch between AC power source and DC/AC converting circuit, then the switching function is achieved, but time delay occurs during switching operation causing the driving circuit to fail to receive energy immediately
Solution Approach 1:
The patent extracts the DC/DC converting circuit from the traditional three-stage conversion path and connects it directly to the driving circuit, bypassing the DC/AC converting circuit during backup power operation. This extraction eliminates the unnecessary conversion stage and reduces switching response time, allowing the driving circuit to receive energy immediately when AC power is interrupted.
Solution Approach 2:
The patent segments the power conversion path into two independent modes: normal mode (AC power source directly to driving circuit) and backup mode (energy storage element through DC/DC converting circuit directly to driving circuit). This segmentation allows the system to switch between modes without requiring complex triple-end switching, thereby reducing switching delay and improving response time.
2Reliability
If backup electric energy is discharged through DC/DC converting circuit, DC/AC converting circuit and driving circuit (three-stage conversion), then the energy can be converted and output, but energy loss occurs during power conversion
Solution Approach 1:
The patent extracts the DC/DC converting circuit to create a direct two-stage conversion path from the energy storage element to the driving circuit during backup power operation. By taking out the unnecessary DC/AC converting circuit from the power path, the system reduces the number of conversion stages from three to two, thereby minimizing energy loss while maintaining reliable backup power conversion.
3Ease of manufacture
If the voltage of energy storage element is low, then the cost is reduced, but thicker wires and additional EPS port are needed to handle high current
Solution Approach 1:
The patent changes the voltage parameter of the energy storage element to a higher level (e.g., 192V or 384V DC) to reduce the current required for power delivery. This parameter change allows the use of thinner wires and eliminates the need for additional EPS ports, as the higher voltage system can deliver the same power with lower current, thereby reducing material quantity and component requirements while maintaining cost-effectiveness.
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 solution ensures continuous operation during power interruptions with improved energy conversion efficiency and lower costs by using a two-stage circuit for energy conversion and reducing the current required, thus eliminating the need for additional components and thicker wires.
Implementation Method 1
The DC/DC converting circuit is configured to convert the first DC electric energy discharged from the energy storage element to a second DC electric energy when the power outputted from the AC power source is interrupted or abnormal
Implementation Method 2
The charging circuit is configured to receive and convert the first AC electric energy to charge the energy storage element when the AC power source outputs power normally
Implementation Method 3
The first DC/AC converting circuit is configured to convert the second DC electric energy to a second AC electric energy
Data Source
AI summary
An uninterruptible power operating apparatus includes an energy storage element, a charging circuit, a DC/DC converting circuit, a first DC/AC converting circuit, a driving circuit and a switching element. The DC/DC converting circuit is electrically connected with the energy storage element to convert its first DC energy to a second DC energy. The first DC/AC converting circuit is electrically connected with the DC/DC converting circuit. The driving circuit is electrically connected between an AC power source and a load. The switching element is electrically connected between the DC/DC converting circuit and the driving circuit. When the AC power source outputs power normally, the switching element is turned off, and the driving circuit receives energy from AC power source. When the power outputted from the AC power source is interrupted or abnormal, the switching element is turned on, and the driving circuit receives the second DC energy through the switching element.