Electric Drive Retrofit for Work Machines
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Solution Overview
Problem
Existing work machines with diesel engines face challenges in reducing pollutant emissions and noise, and there is a need for an efficient and cost-effective way to retrofit them with electric drive systems that can handle various operating modes.
Innovation Solution
An electric drive arrangement for a work machine's drive train incorporating a multi-gear transmission with at least two gears for different transmission ratios, coupled with an electric motor and a reduction gear, allowing for compact integration and power shifting under load, enabling easy conversion of diesel engines to electric drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a diesel engine is used to drive work machines, then high power and torque are achieved, but pollutant emissions and noise generation increase
Solution Approach 1:
The patent replaces the diesel engine (mechanical/combustion system) with an electric motor system. The electric motor is coupled to the multi-gear transmission to provide drive power, eliminating the combustion process that generates pollutant emissions and noise while maintaining the required power output for work machine operations.
2Adaptability or versatility
If an electric motor is coupled to a multi-gear transmission, then various driving modes are enabled, but the size of the electric motor and power electronics increases
Solution Approach 1:
The patent employs a multi-gear transmission system with at least two gears providing different transmission ratios. This allows a single electric motor to serve multiple functions and enable various driving modes (such as high-torque working gear and high-speed road gear) without requiring multiple specialized motors, thereby reducing the overall size of the powertrain system.
3Object-generated harmful factors
If existing work machines are retrofitted with electric drive systems, then pollutant emissions are reduced, but the complexity and cost of conversion increases
Solution Approach 1:
The patent combines the electric motor with the existing multi-gear transmission system of the work machine. By integrating the electric drive components with the already-present transmission infrastructure, the retrofit process leverages existing mechanical structures, thereby reducing the overall complexity and cost of conversion compared to implementing a completely new drive system.
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 solution optimizes drive torque for various operating modes, reduces the size of the electric motor and power electronics, and allows for efficient retrofitting of existing machines, providing a compact and cost-effective electric drive system that minimizes noise and pollutant emissions.
Implementation Method 1
an electric motor (2) configured to drive a driving movement of the work machine via a shaft (3)
Implementation Method 2
a multi gear transmission (8) having a multi gear transmission drive (7) and a multi gear transmission output (9)
Data Source
AI summary
An electric drive arrangement for a drive train of a work machine includes a multi gear transmission. The multi gear transmission includes at least two gears that provide different transmission ratios for various driving modes of the work machine, a multi gear transmission drive, and a multi gear transmission output configured to be mechanically coupled to an axle of the drive train. The electric drive arrangement further includes an electric motor configured to drive a driving movement of the work machine via a shaft that is mechanically coupled to the multi gear transmission drive of the multi gear transmission.