UPS Power Supply System Reducing Switch Devices and Inductors
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Solution Overview
Problem
Conventional UPS systems have complex structures with a high number of switch devices and inductors, which complicates their operation and reduces efficiency in switching between power modes.
Innovation Solution
A power supply system with a simplified structure that includes a rectification and charging-discharging module, a bypass module, and a conversion module, where switches are strategically switched to operate in line mode, battery mode, and AC out of limit mode, reducing the total number of switch devices and inductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional UPS systems use multiple switch devices and inductors to achieve power mode switching, then power supply reliability is improved, but device complexity increases and operation efficiency decreases
Solution Approach 1:
The patent combines the rectification function and battery charging-discharging function into a single integrated module. The same module handles AC-to-DC rectification during normal operation and DC-to-AC inversion during battery mode, eliminating the need for separate rectifier and inverter circuits. This merging reduces device complexity while maintaining power supply reliability through unified control of power flow paths.
Solution Approach 2:
The rectification and charging-discharging module is designed to perform multiple functions: it acts as a rectifier during line mode, as a charger during battery charging, and as an inverter during battery discharge mode. This multi-functional design reduces the total number of switch devices and inductors needed in the system while ensuring reliable operation across all power modes.
2Adaptability or versatility
If conventional UPS systems use multiple switch devices and inductors for power mode switching, then power conversion capability is improved, but operation efficiency decreases
Solution Approach 1:
The patent implements dynamic switching control where the rectification and charging-discharging module adapts its operating state based on power mode requirements. During line mode, it operates as a rectifier; during battery mode, it switches to inverter operation. This dynamic reconfiguration reduces switching losses and improves operation efficiency compared to systems with fixed functional modules, while maintaining full power mode adaptability.
3Adaptability or versatility
If conventional UPS systems use more switch devices and inductors, then power control flexibility is improved, but the number of components increases
Solution Approach 1:
The patent merges multiple functional circuits into a single integrated rectification and charging-discharging module. Instead of having separate rectifier circuits, battery charger circuits, and inverter circuits, one module performs all these functions by dynamically reconfiguring its internal switch states. This reduces the total number of components while maintaining power control flexibility through unified control logic.
Solution Approach 2:
The integrated module is designed with universal functionality to handle all power conversion requirements: AC rectification, battery charging, and DC-to-AC inversion. By making this single module multi-functional, the system achieves the same control flexibility as multi-module systems but with fewer physical components, reducing both quantity and complexity.
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
The system achieves a simplified overall structure and improved efficiency by reducing the number of switch devices and inductors, allowing seamless switching between power modes while maintaining reliable power supply.
Implementation Method 1
a rectification and charging-discharging module with one end coupled to the input terminal through the first switch and coupled to a battery through the third switch
Data Source
AI summary
A power supply system includes an input terminal receiving an alternating current input; an output terminal connected to a load; a first switch, a second switch and a third switch; a rectification and charging-discharging module with one end coupled to the input terminal through the first switch and coupled to a battery through the third switch; a conversion module with one end coupled to the other end of the rectification and charging-discharging module via a direct current bus, and the other end coupled to the output terminal; and a bypass module with one end coupled to the input terminal, and the other end coupled to the output terminal through the second switch. The power supply system operates in one of a line mode, a battery mode or an alternating current out of limit mode by switching the first switch, the second switch, and the third switch on or off