Electric Machine Electromotive Brake Semi-Trailer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semitrailer trucks face challenges with structural space consumption due to the combination of wheel-specific drive devices and transmissions, which reduces stowage space and requires cumbersome servicing and additional brake systems.
Innovation Solution
Integration of an electric machine that functions as both a drive and an electromotive brake, allowing for the elimination of mechanical brake devices, enabling space-saving designs and simplified servicing, with the option to switch between driving, braking, and idle operations, and potentially incorporating a mechanical brake for parking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical brake device is provided at the wheel, then reliable braking is achieved, but structural space is consumed and servicing becomes cumbersome
Solution Approach 1:
The electric machine is merged with the wheel to form an integrated drive unit, combining the functions of propulsion and braking in a single component. This eliminates the need for separate mechanical brake devices, reducing structural space while maintaining braking reliability through electromagnetic braking capability
Solution Approach 2:
The electric machine serves multiple functions: it acts as a drive device for propulsion and simultaneously functions as a brake device through electromagnetic braking. This multi-functionality eliminates the need for dedicated mechanical brake components, reducing overall system space requirements
2Reliability
If a mechanical brake device is provided at the wheel, then braking function is ensured, but servicing complexity increases due to wearing parts
Solution Approach 1:
The mechanical brake device is replaced with an electromotive brake system where the electric machine provides braking through electromagnetic forces. This substitution eliminates friction-based wearing parts such as brake pads and discs, significantly reducing servicing complexity and maintenance requirements
3Adaptability or versatility
If wheel-specific drive devices with transmissions are provided, then drive functionality is achieved, but structural space is consumed reducing stowage space
Solution Approach 1:
The electric machine is integrated directly with the wheel, merging the drive device and wheel into a single unit. This eliminates the need for separate transmission components and reduces structural space, maximizing available stowage space in the semitrailer
Solution Approach 2:
The transmission component is extracted from the drive system by using direct-drive electric machines connected to the wheels. This removal of unnecessary intermediate components reduces structural space requirements while maintaining full drive functionality
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 reduces structural space requirements, minimizes servicing complexity, lowers overall weight and costs, and allows for demand-dependent energy recovery during braking, while maintaining effective braking performance.
Implementation Method 1
an electric machine (16) for driving the wheel (1)
Implementation Method 2
the electric machine (16) is configured so as to act or be operable as an electromotive brake in a braking state
Data Source
AI summary
A semitrailer includes a wheel and an electric machine for driving the wheel, wherein the electric machine is configured so as to be operable as an electromotive brake in a braking state.