Motor Controller Regeneration Torque Control for Vehicle Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor control systems for vehicles lack an efficient mechanism to suppress the approach of a vehicle towards a front vehicle based on user speed-reduction requests while generating regeneration braking force effectively.
Innovation Solution
A motor controller system that includes inter-vehicle sensors, speed sensors, and accelerator sensors, which control regeneration torque based on inter-vehicle distance and speed difference to generate a regeneration braking force, thereby suppressing vehicle approach and efficiently generating electric power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If regeneration torque is increased to generate more electric power, then electric-power generation efficiency is improved, but vehicle deceleration may become excessive affecting driveability
Solution Approach 1:
The control portion dynamically adjusts the regeneration torque parameter based on multiple input parameters (accelerator pressing quantity, inter-vehicle distance, speed difference) to optimize the balance between electric-power generation efficiency and driveability. By changing the regeneration torque parameter according to real-time driving conditions, the system achieves both high productivity and ease of operation.
2Reliability
If regeneration braking force is generated to suppress vehicle approach, then inter-vehicle distance control is improved, but energy recovery may be reduced if braking is too strong
Solution Approach 1:
The control portion uses feedback from sensors detecting inter-vehicle distance and speed difference to continuously adjust the regeneration braking force. This feedback mechanism ensures that the regeneration braking force is sufficient to maintain safe inter-vehicle distance while optimizing energy recovery by avoiding excessive braking that would waste kinetic energy.
3Measurement precision
If multiple sensor inputs are processed to determine speed-reduction request, then control precision is improved, but system complexity increases
Solution Approach 1:
The control portion serves multiple functions by processing inputs from multiple sensors (accelerator sensor, inter-vehicle distance sensor, speed difference sensor) to determine both the driver's speed-reduction request and the conditions for applying regeneration braking. This multi-functional approach improves measurement precision without proportionally increasing device complexity.
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 system effectively suppresses vehicle approach towards a front vehicle and efficiently generates electric power by increasing regeneration torque when necessary, ensuring safe distance maintenance and optimal driveability.
Implementation Method 1
the motor controller controls a motor mounted to a vehicle... the control portion increases the regeneration torque of the motor to be greater than the regeneration torque of when the inter-vehicle distance is greater than the first predetermined distance or when the own vehicle is in a non-approaching state, so as to generate a regeneration braking force
Data Source
AI summary
A motor controller includes an inter-vehicle sensor detecting an inter-vehicle distance between an own vehicle and a front vehicle, a speed sensor detecting a speed difference between a speed of the own vehicle and a speed of the front vehicle, an accelerator sensor detecting an accelerator pressing quantity, and a control portion controlling a regeneration torque of the motor based on the inter-vehicle distance, the speed difference, and the accelerator pressing quantity. When the control portion determines that the accelerator pressing quantity is less than or equal to a predetermined pressing quantity, the control portion determines that a speed-reduction request is generated. When the control portion determines that the inter-vehicle distance is no more than a first predetermined distance and when the own vehicle is in an approaching state, the control portion increases the regeneration torque of the motor, so as to generate a regeneration braking force.