Vehicle Generator Margin Control for Voltage Drop Prevention
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Solution Overview
Problem
Vehicles experience voltage drops due to high power consumption by electrical components, leading to potential malfunctions and accidents, as existing systems fail to effectively manage power generation and consumption.
Innovation Solution
A vehicle system that includes a controller to manage the power generation margin of a generator by adjusting the duty ratio of the input voltage, setting target margins based on battery charging rate, driving state, electrical load type, and duty ratio, and reducing power consumption to prevent voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrical components consume high power in a short period, then power supply capability is improved, but voltage drop occurs leading to component malfunction
Solution Approach 1:
The controller performs preliminary identification of the power generation margin before high-power consumption occurs. By calculating the margin based on the duty ratio and comparing it with a target margin, the system prepares in advance to prevent voltage drops before they happen, rather than reacting after the problem occurs.
Solution Approach 2:
The system dynamically adjusts the power consumption of electrical loads based on real-time conditions. The controller reduces power consumption when the power generation margin is insufficient, creating a dynamic balance between power supply capability and voltage stability to prevent component malfunction.
2Power
If generator output is increased to meet high power demand, then power supply capability is improved, but voltage stability deteriorates
Solution Approach 1:
The controller implements a feedback mechanism by continuously monitoring the power generation margin (calculated from duty ratio) and comparing it with the target margin. Based on this feedback, the controller adjusts the power consumption of electrical loads to maintain voltage stability while meeting power demands.
Solution Approach 2:
The system changes operational parameters dynamically - specifically adjusting the power consumption level of electrical loads based on the power generation margin status. When the margin is insufficient, the controller reduces power consumption parameters to maintain voltage stability within safe ranges.
3Stability of the object's composition
If power consumption is reduced to prevent voltage drops, then voltage stability is improved, but power supply capability deteriorates
Solution Approach 1:
The system dynamically balances power supply capability and voltage stability based on real-time margin assessment. Rather than statically reducing power consumption, the controller adaptively adjusts power levels - reducing consumption only when the power generation margin indicates insufficiency, thereby maintaining optimal power supply capability while ensuring voltage stability.
Data Source
AI summary
A vehicle includes: an electrical load; a generator; a battery; and a controller configured to, control the operation of the generator based on the charging rate of the battery, identify a power generation margin representing a ratio of the power that the generator can output to a maximum power based on the duty ratio of the input voltage applied to the generator, and reduce power consumption of the electrical load based on a comparison between the power generation margin and a target margin. The vehicle can prevent or minimize the voltage drop phenomenon of the generator by using the power generation margin of the generator.