Electric Power Steering Boosting Module Voltage Control
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Solution Overview
Problem
The existing electric power steering systems in electric and hybrid vehicles face challenges with insufficient output power from the driving motor, making it difficult for drivers to steer the wheel, especially during large-angle steering, due to voltage and current limitations.
Innovation Solution
An electric power steering system that includes a boosting module to increase the power supply voltage, comprising a boosting drive unit and a boosting circuit unit with energy-storage components and switch components, such as MOSFETs or IGBTs, to generate and regulate driving signals, allowing the driving motor to receive boosted power and provide sufficient torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the current is increased to provide more output power, then the output power of the driving motor is improved, but the current value is restricted by the electric power steering controller and driving motor, keeping it constant until reaching a predetermined value
Solution Approach 1:
The patent changes the voltage parameter instead of increasing current. By introducing a boosting module to increase the power supply voltage from 12V to a higher level (e.g., 24V or above), the system achieves increased output power through voltage multiplication while keeping current within safe operational limits. This resolves the contradiction by providing power enhancement without exceeding current restrictions.
2Power
If the voltage is increased to provide more output power, then the output power of the driving motor is improved, but the voltage is unable to increase due to system limitations
Solution Approach 1:
The patent introduces a boosting module as an intermediary device between the 12V power supply and the driving motor. This module acts as a voltage converter that takes the limited 12V input and transforms it into a higher voltage output, enabling the driving motor to receive sufficient voltage for high-power operation without modifying the original power supply system.
3Power
If a boosting module is added to increase voltage, then the output power is improved, but the device complexity increases
Solution Approach 1:
The boosting module is designed to perform multiple functions: voltage boosting, power management, and protection of the driving motor. By consolidating these functions into a single integrated module, the patent minimizes the increase in system complexity while achieving significant power enhancement. The module can work with existing 12V power supplies without requiring complete system redesign.
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
The boosting module effectively increases the output power of the driving motor, enabling easier steering by enhancing the torque provided, even with constant current, thus overcoming the limitations of prior systems.
Implementation Method 1
a boosting module for boosting the power supply and supplying a boosted power to the electric power steering controller
Implementation Method 2
a boosting circuit unit with energy-storage components and switch components
Data Source
AI summary
An electric power steering system includes a power supply, a driving motor for supplying mechanical power, and an electric power steering controller configured to control the driving motor and provide power to the driving motor. A boosting module is operatively coupled between the power supply and the electric power steering controller and is configured to boost a power output of the power supply, and supply the boosted power output to the electric power steering controller so that the driving motor receives a boosted power level.