Dual-Voltage Power Supply Circuit for Generator Restart Isolation
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Solution Overview
Problem
Existing electrical power supply systems in moving objects, such as aircraft, lack a satisfactory configuration that ensures efficient and reliable power distribution while minimizing the impact of electrical abnormalities and facilitating the restart of power generators without compromising the operation of critical load devices.
Innovation Solution
A power supply system with parallel-connected electrical power generating devices and storage devices, including reverse flow prevention and connection/disconnection mechanisms, allows for seamless power transfer and generator restarts without affecting main load devices, using voltage conversion to manage power flow and prevent reverse current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single electrical power storage device is connected in parallel with the electrical power generating device, then the system structure is simple, but the system lacks flexibility in handling different voltage requirements and cannot effectively isolate abnormal circuits
Solution Approach 1:
The patent divides the power storage system into multiple independent power storage devices (first power storage device and second power storage device) with different rated voltages. Each power storage device can independently serve different voltage requirements, allowing the system to handle both high-voltage and low-voltage loads simultaneously without requiring complex voltage conversion circuits.
2Productivity
If electrical power supply circuits are connected in parallel to share power resources, then power distribution efficiency is improved, but the impact of electrical abnormalities propagates across the system
Solution Approach 1:
The patent segments the power supply system into multiple independent circuits (first electrical power supply circuit and second electrical power supply circuit) that are connected through a distribution bus. Each circuit has its own power generating device and power storage devices, allowing abnormality isolation while maintaining power sharing capabilities through the common distribution bus.
Solution Approach 2:
The distribution bus acts as an intermediary element that connects multiple independent power supply circuits. It enables power sharing and resource allocation between circuits while maintaining electrical isolation, allowing the system to efficiently distribute power without propagating abnormalities across the entire system.
3Ease of operation
If a reverse flow prevention device is added to limit power flow direction, then power flow control is improved, but the circuit complexity increases
Solution Approach 1:
The reverse flow prevention device is positioned as an intermediary element in the electrical power supply circuit, strategically placed to control power flow direction between the power generating device and power storage devices. This single strategic placement effectively prevents reverse power flow without requiring multiple control devices throughout the circuit, minimizing the increase in overall circuit complexity.
4Adaptability or versatility
If multiple power storage devices with different voltages are connected to the same circuit, then voltage flexibility is improved, but voltage mismatch issues arise
Solution Approach 1:
The patent segments the circuit into multiple independent parallel connections, each with power storage devices of different rated voltages (first power storage device with higher voltage, second power storage device with lower voltage). Each segment operates independently with its own protection and control mechanisms, allowing the system to serve multiple voltage requirements without requiring complex voltage conversion or matching circuits.
Data Source
AI summary
An electrical power supply system includes a first electrical power supply circuit that supplies, to a first load device a DC electrical power output from a first electrical power generating device, a second electrical power supply circuit that supplies, to a second load device, a DC electrical power output from a second electrical power generating device, a first connection circuit including a first connection device capable of connecting the first electrical power supply circuit and the second electrical power supply circuit, a first electrical power storage device connected, in parallel with the first electrical power generating device, to the first electrical power supply circuit, and a second electrical power storage device connected, in parallel with the first electrical power generating device, to the first connection circuit, and having a rated output voltage lower than that of the first electrical power storage device.