Electric Motor Vibration Control for BEV Braked Launch Feedback
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Solution Overview
Problem
Battery-operated electric vehicles (BEVs) lack the driving sensation of a racing start due to the absence of rotational speed idling and vibrations, making the experience unspectacular for drivers.
Innovation Solution
A method for controlling the electric motor by applying a predefined basic current and an excitation scheme to generate vibrations during a braked start, mimicking the sensation of an internal combustion engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If launch control is provided for electric vehicles to enable braked starting at full load, then the starting performance is optimized, but the driver does not experience the sensation of vibrations and idling that characterizes internal combustion engines
Solution Approach 1:
The patent applies mechanical vibration by generating controlled vibrations in the vehicle body during launch control operation. The control device causes the electric motor to generate vibrations that are transmitted to the vehicle body, creating a tactile sensation for the driver that mimics the vibrations of an internal combustion engine during racing start, thereby resolving the contradiction between optimized starting performance and driving sensation.
Solution Approach 2:
The patent uses the vehicle body as an intermediary to transmit the electric motor's vibrations to the driver. By causing the electric motor to generate vibrations that are transmitted through the vehicle body structure, the system creates an intermediate transmission path that delivers tactile feedback to the driver, bridging the gap between the electric motor's operation and the driver's sensory experience.
2Power
If the electric motor is activated simultaneously with brake and gas pedal actuation for racing start, then the vehicle can start at full load, but the absence of rotational speed idling means the driver does not experience the racing start staging
Solution Approach 1:
The patent uses mechanical vibration to provide driving feedback during racing start. By generating controlled vibrations in the vehicle body when the electric motor is activated with brake and gas pedal actuation, the system creates tactile feedback that informs the driver of the motor's power application and staging, compensating for the absence of rotational speed idling information that would otherwise be available with internal combustion engines.
Solution Approach 2:
The patent implements feedback by using vibrations as a sensory signal to the driver. The control device generates vibrations that provide real-time feedback to the driver about the motor's operation and the vehicle's readiness to accelerate, creating an information loop that replaces the traditional auditory and tactile feedback from engine idling and racing start staging.
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 method provides driving feedback and enhances the thrill and emotional state of the driver by simulating engine-like vibrations, making the imminent acceleration more noticeable and enjoyable.
Implementation Method 1
triggering a vibration mode by excitation of the electric motor in accordance with a predefined excitation scheme
Data Source
AI summary
Please substitute the new Abstract submitted herewith for the original Abstract: A method for controlling an electric motor of a battery-operated electric vehicle (BEV) includes receiving a signal for activating a drive slip control function for a braked start at full load of the BEV, supplying the electric motor with a predefined basic application of current while the BEV is in a braked state, and releasing a vibration mode by exciting the electric motor corresponding to a predetermined excitation scheme in addition to the predefined basic application of current. A battery-operated electric vehicle and a control device for a battery-operated electric vehicle are also disclosed.