Vehicle Booster Converter Circuit Current Limiting Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing booster converter circuits for motor-driven vehicles face challenges in managing sudden changes in load current, leading to increased current demands and higher manufacturing costs due to the need for high-capacity components.
Innovation Solution
A booster converter circuit with a switching unit, inductive element, and a control unit that measures and adjusts the duty ratio of the switching element to limit the current within a predetermined range, using a duty ratio determining device to calculate and correct the duty ratio based on measured output voltage and current values, thereby controlling the converter current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the booster converter circuit is designed to handle sudden load changes with high current capacity, then the reliability and adaptability improve, but the manufacturing cost increases due to high-capacity components
Solution Approach 1:
The patent implements dynamic current limiting control that adjusts the duty ratio in real-time based on actual current conditions. The control unit monitors the current through the inductive element and dynamically modifies the switching duty ratio to maintain current within a safe range, transforming the static high-capacity design into a dynamic adaptive system that handles load changes without requiring oversized components
Solution Approach 2:
The patent changes the operating parameters of the booster converter by implementing variable duty ratio control. The control unit adjusts the duty ratio parameter based on feedback from current sensors and voltage measurements, allowing the system to adapt to sudden load changes by modifying the switching characteristics rather than relying on fixed high-capacity hardware
2Power
If the duty ratio is increased to maintain output voltage during sudden load changes, then the power delivery improves, but the current through the inductive element increases beyond safe limits
Solution Approach 1:
The patent implements a feedback control mechanism where the control unit continuously monitors the current through the inductive element and the output voltage. When current approaches unsafe levels, the control unit adjusts the duty ratio to maintain voltage while preventing current from exceeding safe thresholds. This closed-loop feedback system resolves the contradiction by coordinating voltage maintenance with current protection
Solution Approach 2:
The patent applies current limiting control that acts as a protective cushion before excessive current can damage components. The control unit detects current trends and preemptively adjusts the duty ratio to prevent current from reaching harmful levels, even during sudden load changes, thereby protecting the inductive element and other components
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 solution effectively limits the current flowing in the booster converter circuit, allowing the use of less expensive components while maintaining efficient power delivery and adjustable speed control for motor-driven vehicles.
Implementation Method 1
causes an inductive element to generate an induced electromotive force by switching control
Data Source
AI summary
An object of the invention is to limit a current flowing in a booster converter circuit for a vehicle within a predetermined range. In the booster converter circuit for a vehicle including a battery that outputs a DC voltage; a switching unit having a switching element to be controlled to ON or OFF; an inductive element unit being connected between the battery and the switching unit and including an inductive element; a switching control unit that controls the switching element, an output voltage measuring unit that measures an output voltage of the booster converter circuit for a vehicle is provided, and the duty ratio determining device obtains a control duty ratio with respect to the switching element on the basis of a measured output voltage value so that a value of a converter current flowing through a path from the battery to the switching unit falls within a predetermined range.