Power Supply Circuit Connection Control for eVTOL Overcurrent
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Solution Overview
Problem
In power supply systems for electric vertical take-off and landing aircraft, connecting power supply subsystems can lead to overcurrent issues when voltage differences are significant, potentially affecting normal operation.
Innovation Solution
A power supply system with a control device that executes connection control after power consumption suppression and increase controls on load devices to equalize voltage differences between power supply circuits, preventing overcurrent by connecting them only when voltage thresholds are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply subsystems are connected to increase power supply capacity and reliability, then system redundancy and adaptability are improved, but voltage differences between subsystems cause overcurrent that damages the system
Solution Approach 1:
The control device performs preliminary voltage equalization by executing power consumption suppression control on the first load device and power consumption increase control on the second load device before connecting the power supply subsystems. This preliminary action eliminates the voltage difference between subsystems, preventing overcurrent damage when the subsystems are subsequently connected.
Solution Approach 2:
The control device changes the operating parameters of the load devices by adjusting their power consumption levels. By suppressing power consumption of the first load device and increasing power consumption of the second load device, the voltage levels of the two power supply subsystems are equalized, resolving the harmful voltage difference that would cause overcurrent.
2Reliability
If power consumption of load devices is adjusted to equalize voltage differences, then system safety is improved, but load device operation stability may be affected
Solution Approach 1:
The control device applies preliminary anti-action by adjusting load device power consumption before the harmful connection event occurs. By suppressing power consumption of the first load device and increasing power consumption of the second load device, the voltage difference is eliminated in advance, preventing overcurrent damage while maintaining load device operation stability during normal operation.
Solution Approach 2:
The control device temporarily changes the operating parameters of the load devices only when voltage equalization is required. By adjusting power consumption levels of specific load devices, the voltage parameters of the power supply subsystems are equalized, ensuring system safety without permanently affecting load device operation stability.
Data Source
AI summary
A power supply system includes: a first power supply circuit for supplying, to a first load device, direct current electric power output from a first power generation device; and a second power supply circuit for supplying, to a second load device, direct current electric power output from a second power generation device. In a case where the electric power output from the second power generation device is supplied to the first load device, a control device connects the first power supply circuit and the second power supply circuit to each other after suppressing the power consumption of the first load device and increasing the power consumption of the second load device.