Lawn Vehicle Drive Controller Current Monitoring
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Solution Overview
Problem
Battery-powered lawn care vehicles face inefficiencies in drive motor control, leading to reduced cutting performance and battery life due to unmonitored total current consumption, which can exceed thresholds during obstacles or high grass conditions.
Innovation Solution
A battery-powered riding lawn care vehicle equipped with a current sensor and drive controller that monitors total current drawn and adjusts the electric drive motor speed based on real-time data to maintain optimal performance and extend battery life by reducing speed when current exceeds thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drive motor speed is maintained at high levels to improve cutting performance, then cutting performance is improved, but total current consumption exceeds thresholds reducing battery life
Solution Approach 1:
The controller receives real-time total current consumption data from a current sensor and automatically adjusts drive motor speed based on this feedback. When current consumption exceeds a predetermined threshold, the controller reduces motor speed to prevent battery overload, thereby extending battery life while maintaining cutting performance within acceptable parameters.
Solution Approach 2:
The system dynamically adjusts drive motor speed based on real-time operating conditions and current consumption levels. Rather than maintaining a fixed high speed for optimal cutting, the motor speed varies automatically to balance cutting performance with battery conservation, especially during high-grass or obstacle conditions that increase power demand.
2Use of energy by moving object
If the drive motor speed is reduced to conserve battery power, then battery life is extended, but cutting performance deteriorates
Solution Approach 1:
The controller continuously monitors total current consumption and only reduces motor speed when current exceeds the predetermined threshold. This feedback mechanism ensures that cutting performance is maintained at optimal levels during normal operating conditions, and only adjusted when necessary to prevent battery overload.
Solution Approach 2:
The system changes the motor speed parameter dynamically based on current consumption levels. During normal operation, the motor runs at high speed for optimal cutting performance. When current consumption indicates high-grass or obstacle conditions, the controller adjusts the speed parameter to reduce power demand and extend battery life.
3Use of energy by moving object
If real-time current monitoring and automatic speed adjustment systems are implemented, then battery life is extended and cutting performance is optimized, but device complexity increases
Solution Approach 1:
The controller receives real-time total current consumption data from a current sensor and automatically adjusts drive motor speed based on this feedback. When current consumption exceeds a predetermined threshold, the controller reduces motor speed to prevent battery overload, thereby extending battery life while maintaining cutting performance within acceptable parameters.
Solution Approach 2:
The system is self-regulating, automatically adjusting motor speed based on real-time current consumption without requiring manual intervention. The controller monitors power usage and autonomously optimizes performance versus battery conservation, eliminating the need for complex user interfaces or manual adjustments.
Data Source
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AI summary
A riding lawn care vehicle may include a battery power source, an electric drive motor, at least one blade drive motor, a current sensor, and a drive controller. The electric drive motor may be powered by the battery power source. The electric drive motor may be operably coupled to a wheel of the riding lawn care vehicle to provide drive power for the riding lawn care vehicle. The at least one blade drive motor may be powered by the battery power source. The at least one blade drive motor may be operably coupled to at least one cutting blade of the riding lawn care vehicle. The current sensor may be disposed to monitor total current drawn from the battery power source. The drive controller may receive total current data from the current sensor and provide a drive control signal related to operation of the electric drive motor based on the total current data.