Power Conversion Circuit Reducing Loss in Uninterruptible Power Systems
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Solution Overview
Problem
Conventional uninterruptible power systems experience reduced efficiency due to increased power loss and larger heat dissipation requirements caused by a higher number of electronic components through which current flows in their power conversion circuits.
Innovation Solution
A power conversion circuit with a reduced number of electronic components, specifically using an inductor, capacitors, switches, and diodes, where current paths are optimized to minimize the number of components through which current flows, implemented with relays, IGBTs, or other semiconductor devices, to reduce power loss and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional power conversion circuit with more electronic components is used, then the circuit can handle more complex power conversion tasks, but power loss increases and efficiency decreases
Solution Approach 1:
The patent removes redundant electronic components from the power conversion circuit, specifically eliminating unnecessary switches and diodes while retaining only the essential components (inductor, capacitor, and minimal switching elements) needed for bidirectional power flow. This extraction of unnecessary elements directly reduces power loss while maintaining core power conversion functionality.
Solution Approach 2:
The patent combines multiple functions into fewer components. The single switching element performs both rectification and inversion functions, and the inductor-capacitor network handles both power factor correction and voltage regulation. This merging reduces the total number of components through which current flows, thereby reducing cumulative power loss.
2Adaptability or versatility
If conventional power conversion circuit with more electronic components is used, then the circuit provides more functionality, but the heat dissipation system volume and cost increase
Solution Approach 1:
By removing redundant switches and diodes from the circuit, the patent reduces the total power loss and consequently the heat generation. This extraction of unnecessary components directly reduces the required heat dissipation capacity, allowing for a smaller and less expensive thermal management system.
Solution Approach 2:
The patent converts the potential harm of having multiple components (increased power loss and heat generation) into a benefit by strategically minimizing the component count. The reduced component count becomes advantageous by lowering both power loss and heat dissipation requirements simultaneously.
3Adaptability or versatility
If conventional power conversion circuit with more electronic components is used, then the circuit can perform multiple operations, but the overall efficiency of the uninterruptible power system is reduced
Solution Approach 1:
The patent implements a universal switching element that can operate in multiple modes (rectification, inversion, power factor correction) without requiring separate dedicated components for each function. This multi-functionality is achieved through strategic component placement and control logic, reducing the total component count while maintaining operational versatility.
Solution Approach 2:
The patent merges power factor correction, rectification, and inversion functions into a single integrated circuit topology. The inductor-capacitor-network combined with the switching element performs all necessary power conversion operations, eliminating the need for separate circuits and reducing cumulative losses.
Data Source
AI summary
A power conversion circuit for an uninterruptible power system, including an inductor, a first capacitor, a second capacitor, a first switch, a second switch, a third switch, a first diode, a second diode, and a third diode body, is provided. A terminal of the second switch is electrically coupled to the inductor through the first switch, and another terminal of the second switch is electrically coupled to a neutral wire and the third switch. An anode and a cathode of the first diode are electrically coupled to the first switch and a positive DC bus, respectively. A cathode and an anode of the second diode are electrically coupled to the first switch and the third switch, respectively. A cathode and an anode of the third diode are electrically coupled to the third switch and a negative DC bus, respectively. In addition, an uninterruptible power system using the same is provided.