UPS Controller Switching Between Inverter and Bypass Feeding Systems
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Solution Overview
Problem
Conventional uninterruptible power supply devices face challenges in balancing AC power quality and efficiency, with full-time inverter feeding systems providing high-quality but inefficient power and full-time bypass feeding systems offering efficient but low-quality power, leading to high costs for separate designs and manufacturing.
Innovation Solution
An uninterruptible power supply device with a controller that selects between two feeding systems using semiconductor and mechanical switches, allowing for either high-quality inverter power or efficient bypass power based on user preferences, while minimizing device costs by using a single hardware configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a full-time inverter feeding system is used, then AC power quality is improved, but power efficiency deteriorates
Solution Approach 1:
The system dynamically switches between inverter feeding mode (for high power quality) and bypass circuit mode (for high efficiency) based on real-time conditions. The controller automatically selects the optimal feeding system, allowing the device to adapt between quality and efficiency requirements rather than being fixed in one mode.
2Loss of energy
If a full-time bypass feeding system is used, then power efficiency is improved, but AC power quality deteriorates
Solution Approach 1:
The system transitions from a static bypass-only approach to a dynamic system that can switch between bypass mode (for efficiency) and inverter mode (for quality). This allows the device to maintain high efficiency during normal operation while providing high-quality power when needed or during inverter failure.
3Adaptability or versatility
If separate uninterruptible power supply devices are designed for full-time inverter feeding and full-time bypass feeding, then feeding system versatility is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
A single uninterruptible power supply device is designed to perform multiple functions by incorporating both inverter feeding capability and bypass circuit capability. The controller enables the device to operate in different feeding modes (full-time inverter, full-time bypass, or automatic switching) without requiring separate dedicated devices for each mode, thereby reducing complexity and manufacturing cost while maintaining versatility.
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 solution enables a low-cost uninterruptible power supply device that can switch between high-quality and efficient power modes, reducing manufacturing costs and providing flexible power delivery options.
Implementation Method 1
a converter connected to the first input terminal and configured to convert the first AC power into DC power
Implementation Method 2
an inverter configured to convert the DC power generated by the converter or DC power of the power storage device into third AC power
Data Source
AI summary
An uninterruptible power supply device is basically a device that performs a full-time inverter feeding system using a first semiconductor switch, and when a second semiconductor switch, which is an optional item, is connected in parallel to the first semiconductor switch and a full-time bypass feeding system is selected, serves as a device that performs the full-time bypass feeding system using the second semiconductor switch. This leads to a low device cost compared with the case in which an uninterruptible power supply device employing the full-time inverter feeding system and an uninterruptible power supply device employing the full-time feeding system are designed and manufactured separately.