Dual Power Supply Circuit With Reactor-Limited Inrush Transfer
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Solution Overview
Problem
Existing electrical power supply systems face issues with inrush currents that can damage electronic devices during failures in power supply, particularly in moving objects like aircraft, where sudden power disruptions can occur.
Innovation Solution
The system includes a connection circuit with reactors in series to the connection device, which generates a counter-electromotive force to suppress the peak value of inrush currents, and a disconnection device to isolate the power generating device from the supply circuit during failures, protecting electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connection device connects the first electrical power supply circuit and the second electrical power supply circuit during a failure, then the power supply reliability is improved, but the inrush current damages the electronic devices
Solution Approach 1:
The patent introduces a reactor as an intermediary component between the connection device and the electrical power supply circuits. This reactor acts as a mediator that allows the connection to be established while simultaneously suppressing the harmful inrush current, thus resolving the contradiction between maintaining power supply reliability and preventing inrush current damage to electronic devices
Solution Approach 2:
The patent converts the harmful inrush current into a beneficial controlled current flow by using the reactor's inductance to limit and regulate the current during the connection process. The connection device's closing action, which originally caused harmful inrush current, is transformed into a controlled operation that maintains power supply reliability while preventing damage through the reactor's current-limiting effect
2Object-affected harmful factors
If the disconnection device isolates the power generating device during failure, then the protection of electronic devices is improved, but the power supply continuity is reduced
Solution Approach 1:
The patent segments the power supply system into distinct isolatable sections using the disconnection device. This allows the faulty power generating device to be isolated from the rest of the system, protecting electronic devices from damage while the healthy portions of the system continue to operate and maintain power supply continuity through the connection circuit
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 effectively suppresses inrush currents, protecting electronic devices and maintaining stable power supply in the event of failures, ensuring reliable operation in moving objects.
Implementation Method 1
the connection circuit with reactors in series to the connection device, which generates a counter-electromotive force to suppress the peak value of inrush currents
Data Source
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AI summary
A electrical power supply system (10) is equipped with a first electrical power supply circuit (12a), a second electrical power supply circuit (12b), a connection circuit (18a) including a connection device (20a) capable of connecting the first electrical power supply circuit and the second electrical power supply circuit to each other, a control device (34), and a disconnection device (22a). The connection circuit also includes a reactor (23a) connected in series to the connection device. In a case that a failure has occurred in the supply of electrical power from a first electrical power generating device (14a) to the first electrical power supply circuit (12a), the control device executes a connection control on the connection device in a state in which the first electrical power supply circuit and the connection circuit are disconnected from the first electrical power generating device by the disconnection device.