Electric Lawn Mower Energy Absorbing Module for Regenerative Voltage Control
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Solution Overview
Problem
Existing electric lawn mowers face challenges in providing a robust and efficient mechanism to control and mount motors, ensuring compactness, and maximizing runtime and cutting area, while effectively managing power distribution to drive and deck motors.
Innovation Solution
The design incorporates a frame with an upper body, side plates, and a lower support body, featuring drive motors, deck motors, a battery system, and a motor control panel with thermally-conductive materials, power switches, and regenerative energy control modules to manage power distribution and optimize motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a robust motor control mechanism is implemented, then motor control reliability is improved, but device complexity increases
Solution Approach 1:
The motor control system is divided into separate control modules, each responsible for specific functions. The control panel (138) contains multiple independent control circuits that can be individually designed, tested, and maintained, reducing overall system complexity while maintaining robust control through modular architecture.
Solution Approach 2:
A microprocessor-based control system serves as an intermediary between the battery power system and the drive motors. This intelligent mediator manages power distribution, monitors system status, and coordinates motor operation, simplifying the control architecture while ensuring reliable and efficient motor control through centralized intelligence.
2Stability of the object's composition
If multiple motors are mounted securely, then operational stability is improved, but device complexity increases
Solution Approach 1:
The drive motors are integrated into the wheel assemblies, combining the motor, transmission, and wheel functions into unified units. This merging reduces the number of separate mounting structures needed while maintaining secure attachment and operational stability through integrated design.
Solution Approach 2:
The motor mounting structures are designed to serve multiple functions: securing the motors to the frame, providing structural support for the wheel assemblies, and facilitating easy removal for maintenance. This multi-functionality reduces overall device complexity while ensuring operational stability.
3Productivity
If motors are designed in compact manner, then cutting area efficiency is improved, but motor mounting space requirements worsen
Solution Approach 1:
The motors are nested within the wheel assemblies, with the motor housing integrated into the wheel structure. This nesting arrangement maximizes space utilization by placing motors in previously unused spaces, maintaining compact design while providing adequate mounting area for efficient cutting operation.
Solution Approach 2:
The motor mounting structure utilizes three-dimensional space efficiently by arranging motors vertically and laterally across different levels of the frame. This dimensional optimization allows compact motor placement while maintaining adequate spacing for heat dissipation and maintenance access.
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
This configuration enhances motor control and power management, enabling extended runtime, increased cutting efficiency, and compact design, while ensuring robust operation and efficient energy use.
Implementation Method 1
at least one regenerative energy absorbing module that is activated by the at least one regenerative energy control module when the voltage from the battery exceeds a voltage threshold
Implementation Method 2
motor control panel with thermally-conductive materials, power switches, and regenerative energy control modules
Data Source
AI summary
An electric lawn apparatus is provided including a frame having an upper body and a lower support body, two drive motors, a mow deck supporting multiple deck motors, and a battery. The apparatus further includes a motor control panel having one or more control modules that control the drive motors and the deck motors and a regenerative energy control module; and a regenerative energy absorbing module that is physically decoupled from the motor control panel and is activated by the regenerative energy control module when the voltage from the battery exceeds a voltage threshold.