Electric Motor Output Curve Tailoring for Vehicle Power Optimization
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Solution Overview
Problem
Conventional battery and electric motor combinations in electric vehicles often fail to provide an appropriate power source, especially as electric vehicles are used in various environments and activities, leading to suboptimal performance and battery life.
Innovation Solution
A method and system that utilize sensors, such as inclinometers, pitch sensors, and user data to tailor the output power curve of electric motors, adjusting power based on real-time vehicle and user inputs to optimize performance and battery conservation, including features like assist thresholds and regenerative braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed battery and electric motor combination is used, then the vehicle structure is simple, but the performance is suboptimal in various environments and activities
Solution Approach 1:
The patent implements dynamic adjustment of the electric motor's output power curve in real-time based on sensor data from multiple sources (inclinometer, pitch sensor, accelerometer, pressure sensor, forward looking sensor, user mobile device). The controller continuously modifies motor assistance levels according to detected terrain conditions, user pedaling effort, and vehicle state, transforming a static motor system into an adaptive one that optimizes performance for varying environments and activities
Solution Approach 2:
The system employs multiple feedback loops where sensor data about terrain slope, acceleration, pressure, and user input is continuously fed back to the controller. The controller processes this feedback and adjusts the motor output accordingly, creating a closed-loop control system that resolves the contradiction by enabling environment-specific optimization without requiring multiple fixed configurations
2Power
If higher power output is provided to improve performance, then the vehicle performance increases, but the battery power consumption increases
Solution Approach 1:
The patent dynamically changes the output power curve parameters of the electric motor based on real-time conditions. The controller adjusts voltage, current, and power delivery parameters according to terrain demands and user needs, providing high power only when necessary (e.g., steep hills detected by inclinometer, rapid acceleration detected by accelerometer) and reducing power during normal conditions, thus optimizing the power-to-energy-consumption ratio
Solution Approach 2:
The system applies motor assistance partially rather than continuously, activating high-power output only when sensor data indicates genuine need (such as when assist threshold is met through user crank input or when terrain conditions demand additional power). This partial action approach prevents unnecessary energy consumption while maintaining performance when required
Data Source
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AI summary
A method for controlling an electric vehicle's electric motor output, said method comprising: obtaining electric vehicle data; obtaining user-related data; receiving input from at least one sensor; and utilizing a controller to evaluate said electric vehicle data, said user-related data, and said input from said at least one sensor, and automatically tailor an output power curve of an electronic motor to improve performance for said electric vehicle for a given rate of conservation of a battery provided source of power.