Electric Mower Cutter Speed Matching for Energy and Heat Control
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Solution Overview
Problem
Conventional electric mowers operate with a fixed cutter speed or manual adjustment, leading to excessive energy consumption, motor overheating, and reduced mowable area due to high cutter speeds, especially when the mower speed varies under different working conditions.
Innovation Solution
A mower system with a vehicle control unit that adjusts cutter speed based on vehicle speed, incorporating a cutter governor switch for adjustable ratios, and a battery management system to manage energy consumption and protect components from overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotating speed of the cutter is set to a high value to achieve effective mowing at maximum mower speed, then the mowing effectiveness is improved, but the energy consumption of the cutter motor increases excessively
Solution Approach 1:
The patent implements dynamic speed adjustment by linking the cutter motor speed to the mower's actual traveling speed through a control unit. The cutter speed is no longer fixed but dynamically adapts to match the mower's forward speed, ensuring optimal cutting performance while minimizing energy consumption during low-speed operation.
Solution Approach 2:
The control unit changes the operating parameters of the cutter motor based on detected mower speed. When the mower travels at low speed, the control unit reduces the cutter motor speed parameter; when the mower travels at high speed, the control unit increases the cutter motor speed parameter, thereby optimizing the energy-performance balance.
2Productivity
If the rotating speed of the cutter is set to a high value to ensure effective mowing, then the cutting performance is improved, but the cutter motor generates excessive heat leading to overheating and potential damage
Solution Approach 1:
The system dynamically adjusts cutter motor speed based on actual mower operating conditions. During low-speed mowing, the cutter motor operates at reduced speed, generating less heat and preventing overheating. The control unit continuously monitors and adjusts the motor speed to maintain safe operating temperatures while preserving cutting effectiveness.
Solution Approach 2:
The control unit proactively prevents overheating by reducing cutter motor speed before excessive heat accumulation occurs. By anticipating the thermal load based on mower speed, the system cushions against potential overheating damage rather than reacting after the problem arises.
3Use of energy by moving object
If the capacity of the power battery is increased to support higher cutter motor power, then the energy availability is improved, but the size and cost of the mower increases
Solution Approach 1:
The system applies partial action by operating the cutter motor at reduced power during low-speed mowing conditions. Instead of always using full power, the control unit adjusts the motor output to match actual needs, thereby reducing the total energy requirement and allowing for a smaller, more compact battery design.
Solution Approach 2:
The control unit changes the power consumption parameter of the cutter motor dynamically. By reducing the motor power parameter during low-speed operation, the overall energy demand decreases, enabling the use of a smaller battery with lower capacity while still meeting all operational requirements.
4Productivity
If the rotating speed of the cutter is set to a high value, then the mowing effectiveness is improved, but the working noise of the mower increases
Solution Approach 1:
The system dynamically adjusts the cutter motor speed to match the mower's traveling speed. During low-speed mowing, the cutter operates at lower speed, generating less noise. The control unit ensures that the cutter speed is optimized for each operating condition, reducing noise pollution while maintaining effective cutting performance.
Data Source
AI summary
The disclosure provides a mower system, a method for setting the rotating speed of a cutter and a mower system management method. The system comprises: a vehicle control unit for controlling the mower to operate; a walking unit for receiving a control signal of the vehicle control unit to control the walking of the mower and perform state feedback to the vehicle control unit; a cutter unit for receiving a control signal sent by the vehicle control unit to control the cutter to run and carrying out state feedback to the vehicle control unit; and a battery management system for performing state feedback on the working state of the battery to the vehicle control unit. The cutter rotating speed can be adjusted instantly according to the vehicle speed, and when the cutter motor enters limit state, the speed can be limited.