Uninterruptible Power Supply Coupled Inductor Integration
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Solution Overview
Problem
Current uninterruptible power supply devices are bulky due to their large component count, which increases control complexity and cost while lowering overall stability and efficiency.
Innovation Solution
The design integrates an AC to DC power conversion module, a DC to DC power conversion module, and an inverter module using a coupled inductor configuration with a single switch and bridge arms, reducing component number and enhancing utilization rate, and employs a controlling unit to manage power conversion and filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three independent circuits (AC to DC power converter, DC to DC power converter, and inverter) are used to ensure reliable power supply, then power conversion reliability is improved, but device complexity and component number increase
Solution Approach 1:
The patent combines three independent power conversion circuits (AC to DC converter, DC to DC converter, and inverter) into a single integrated circuit. The coupled inductor structure enables multiple power conversion functions to be performed by one unified circuit architecture, reducing component count while maintaining the reliability benefits of having separate conversion stages.
Solution Approach 2:
The single power conversion circuit is designed to perform multiple functions: AC to DC conversion, DC to DC conversion, and inverter operations. The coupled inductor and switching network are configured to enable these different conversion modes within one universal circuit structure, eliminating the need for dedicated circuits for each function.
2Adaptability or versatility
If three independent circuits are used to provide comprehensive power conversion functions, then functional versatility is improved, but control complexity increases
Solution Approach 1:
The control system manages all power conversion functions (AC to DC, DC to DC, and inverter operations) through a single integrated control unit rather than separate control circuits. This unified control approach reduces the overall control complexity while maintaining the ability to perform multiple conversion functions.
3Reliability
If large component number is used to ensure stable power supply, then power supply stability is improved, but device volume increases
Solution Approach 1:
The patent integrates multiple power conversion functions into a single compact circuit structure using coupled inductors. This consolidation reduces the overall device volume by eliminating redundant components and optimizing the spatial arrangement of shared elements, while maintaining power supply stability through the integrated design.
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 the component count, lowers power consumption, improves overall efficiency, and enhances stability by reducing voltage stress on components and integrating functions within fewer components.
Implementation Method 1
a first inductor L1 and a second inductor L2 having a coupled structure
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An uninterruptible power supply apparatus (100, 100') includes a switch (10), a first inductor (L1), a direct current (DC) controlling unit (20, 20'), a first bridge arm (30), a second bridge arm (40) and a third bridge arm (50). When the switch (10) switches the first inductor (L1) coupled to an alternative current (AC) power (Vac), the AC power (Vac) converts into a bus voltage (Vbus) via the first inductor (L1), the first bridge arm (30) and the second bridge arm (40), and converts into an output power (Vo) via the second bridge arm (40) and the third bridge arm (50). When the switch (10) switches the first inductor (L1) coupled to a DC power (Vdc), the DC power (Vdc) converts into the bus voltage (Vbus) via the DC controlling unit (20, 20') and the first inductor (L1), and converts into the output power (Vo) via the second bridge arm (40) and the third bridge arm (50).