Power Supply Controller Convergence Voltage Stabilization
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Solution Overview
Problem
In redundant power supply systems, the second power supply is discharged when the inter-system switch is turned off and then back on, leading to a decrease in the amount of charge, which can cause voltage drops and potentially damage the inter-system switch and disrupt automatic drive functions.
Innovation Solution
A power supply control device with a controller that performs convergence control to stabilize the voltage difference between the first and second power supplies before turning on the inter-system switch again, ensuring the battery switch remains off during this process to prevent discharge and maintain charge levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the inter-system switch is turned off and then back on to restore automatic drive, then the automatic drive interruption time is reduced, but the voltage of the second power supply drops due to discharge
Solution Approach 1:
The controller performs preliminary convergence control on the voltage of the second power supply before turning on the inter-system switch. This preliminary action prevents voltage drop when the switch is activated, ensuring the voltage remains within the normal operating range and avoiding the need for repeated switch operations.
Solution Approach 2:
The controller continuously monitors the voltage of the second power supply and adjusts the convergence control based on feedback from voltage measurements. When the voltage is detected to be outside the normal range, the controller activates convergence control to adjust the voltage back to the acceptable range before switching.
2Stability of the object's composition
If convergence control is performed by keeping the battery switch on, then the voltage difference is reduced, but the amount of charge in the second power supply decreases
Solution Approach 1:
The controller performs preliminary convergence control on the voltage of the second power supply before turning on the inter-system switch. This preliminary action prevents voltage drop when the switch is activated, ensuring the voltage remains within the normal operating range and avoiding the need for repeated switch operations.
Solution Approach 2:
The controller continuously monitors the voltage of the second power supply and adjusts the convergence control based on feedback from voltage measurements. When the voltage is detected to be outside the normal range, the controller activates convergence control to adjust the voltage back to the acceptable range.
Data Source
AI summary
A power supply control device includes a first system, a second system, an inter-system switch, a battery switch and a controller. The controller turns off an inter-system switch that connects and disconnects the systems and turns on a battery switch that connects and disconnects a second power supply to and from the second system in response to an abnormality of a first power supply or the second power supply being detected and thereafter turn on the inter-system switch and turns off the battery switch in response to determination that there is no abnormality in the power supplies. Before turning on the inter-system switch, when voltage difference between the power supplies is equal to or larger than a threshold, the controller performs convergence control, and after determining that there is no abnormality in the power supplies, the controller keeps the battery switch turned off while performing the convergence control.