Adaptive Voltage Transient Control for External Vehicle Loads
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Solution Overview
Problem
Existing vehicle power systems struggle to manage high voltage transients caused by sudden load changes, particularly with external loads like snowplows, which vary in size and weight, leading to unpredictable load current and voltage variations.
Innovation Solution
A vehicle system with a power source, processor, and power train control module (PCM) that generates fault signals in response to voltage transient events, adjusts calibration parameters to minimize fault signals by controlling the voltage based on feedback from vehicle loads, ensuring stable operation during external load connections and disconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a predetermined voltage set point is used to mitigate high voltage transients, then voltage stability is improved, but adaptability to different external loads deteriorates
Solution Approach 1:
The voltage set point is changed from a static predetermined value to a dynamic value that is adjusted in real-time based on feedback from fault signals. The controller monitors fault signals from vehicle loads and continuously adapts the voltage set point to match current operating conditions, resolving the contradiction between stability and adaptability.
Solution Approach 2:
A feedback mechanism is implemented where fault signals from vehicle loads are monitored and used to adjust the voltage set point. The controller receives feedback about voltage transient events and load conditions, then modifies the voltage set point accordingly, enabling the system to maintain stability while adapting to different external loads.
2Object-affected harmful factors
If voltage set point is lowered to mitigate transients, then voltage transient mitigation is improved, but power delivery capability deteriorates
Solution Approach 1:
The voltage set point dynamically adjusts between higher values (for power delivery) and lower values (for transient mitigation) based on real-time feedback. During normal operation, the voltage set point maintains power delivery capability, while during detected transient events, it temporarily lowers to mitigate damage, then restores afterward.
Solution Approach 2:
The voltage set point undergoes periodic adjustment cycles: maintaining normal voltage for power delivery, detecting transients through fault signals, temporarily lowering voltage to mitigate damage, then restoring voltage. This periodic action between high and low voltage states resolves the contradiction between power delivery and transient mitigation.
Data Source
AI summary
A vehicle includes first loads, a power source, and a processor coupled to the power source. Each of the first loads is configured to generate a fault signal indicative of an occurrence of an action performed by said first load to mitigate a voltage transient event. The processor is configured to, in response to a second different load being electrically coupled to the power source: control a voltage available within the power source based on calibration parameters; and in response to receiving the fault signal, adjust at least one of the calibration parameters.