Electric Work Vehicle Powertrain Layout for Multi-Motor Power Distribution
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Solution Overview
Problem
Existing electric work vehicles, such as electric tractors, lack an efficient and robust powertrain system that effectively utilizes multiple motors to drive wheels and auxiliary components, leading to inefficiencies and limited functionality.
Innovation Solution
A powertrain system for electric work vehicles comprising four motors, each driving a wheel or an auxiliary component, supported by a rear housing, with a centralized battery housing and inverter system to manage power distribution, enabling efficient power transmission and operation of hydraulic systems and PTO.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple motors are used to power different components (wheels, PTO, hydraulic systems), then power distribution efficiency and operational capabilities are improved, but device complexity increases
Solution Approach 1:
The patent divides the power distribution system into four separate motors, each dedicated to a specific function (two for rear wheels, one for PTO, one for hydraulic systems). This segmentation allows each motor to be optimized for its specific task while simplifying the overall control architecture, as each motor can be independently controlled without complex coordination requirements.
Solution Approach 2:
The battery system serves as a universal power source for all four motors and other vehicle components. The electrical architecture is designed to provide power to multiple different functions through a common electrical system, allowing flexible power distribution while maintaining a unified power source rather than requiring separate power sources for each component.
2Adaptability or versatility
If multiple motors are supported by the rear housing, then operational capabilities are enhanced, but manufacturing complexity increases
Solution Approach 1:
Each motor is mounted in a dedicated mounting location on the rear housing, with specific mounting structures designed for each motor position. This segmented approach to motor integration allows for standardized mounting procedures that can be replicated for each motor, simplifying the manufacturing process despite having multiple motors.
Solution Approach 2:
The rear housing serves as a consolidated support structure for all four motors, combining multiple motor mounting functions into a single integrated component. This merging of support functions into the rear housing reduces the total number of separate mounting structures needed and simplifies assembly procedures.
Data Source
AI summary
An electric work vehicle includes a rear housing, a first motor to drive a first rear wheel, the first motor being supported by the rear housing, a second motor to drive a second rear wheel, the second motor being supported by the rear housing, a third motor to drive a first electric work vehicle component other than a wheel, the third motor being supported by the rear housing, and a fourth motor to drive a second electric work vehicle component other than a wheel, the fourth motor being supported by the rear housing.