Integrated E-Mobility Drive Motor With Planetary Reducer Packaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for a driving motor system in electric mobility that optimizes packaging and reduces components while providing a robust gear structure for power transmission and an easy-to-assemble connection structure, particularly for high-output applications in small electric vehicles like e-bicycles and e-cargos, where space efficiency and mass productivity are crucial.
Innovation Solution
The system includes a motor housing with an inverter that converts DC power to AC, a motor with a coaxial input and output gear structure, and a reducer with planetary gears for increased driving force transmission, along with a robust bearing system for stable support, and a rotor hub made of aluminum to reduce weight and enhance assembly convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high-output driving system is applied to small electric mobility, then the power output is improved, but the packaging size and weight increase
Solution Approach 1:
The patent combines the motor and reducer into a single integrated housing structure, where the motor stator, rotor, and reducer gears share a common housing space. This merging eliminates the need for separate motor housing and reducer housing, significantly reducing the overall packaging volume while maintaining high power output capability
Solution Approach 2:
The patent implements a nested configuration where the planetary gear set is positioned inside the motor housing, and the inverter is mounted on the housing exterior. The input gear of the reducer is directly coupled to the motor rotor, creating a compact nested arrangement that maximizes space utilization and minimizes the external dimensions of the driving system
2Device complexity
If the number of components is reduced for packaging optimization, then the packaging efficiency is improved, but the assembly complexity increases
Solution Approach 1:
The patent merges multiple components into integrated assemblies: the motor and reducer share a common housing, the input gear is directly coupled to the rotor eliminating a separate coupling component, and the inverter is mounted directly on the housing. This reduction in component count simplifies the assembly process while maintaining manufacturing robustness
Solution Approach 2:
The patent segments the driving system into three main modules: the motor-reducer integrated unit, the inverter unit, and the bearing support structures. This segmentation allows for standardized manufacturing of each module and simplified assembly through modular integration, reducing overall assembly complexity
3Reliability
If a robust gear structure is designed for power transmission, then the transmission reliability is improved, but the weight and size increase
Solution Approach 1:
The patent employs a planetary gear mechanism that dynamically distributes the transmission load across multiple gear teeth and multiple planetary gears simultaneously. This dynamic load distribution provides robust power transmission with high reliability while using lighter-weight gears compared to single-tooth engagement systems, as the load is shared among multiple contact points
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 optimizes packaging, reduces the overall size and weight of the driving motor system, enhances assembly efficiency, and provides a robust power transmission structure suitable for high-output applications in small electric vehicles, improving space utilization and component integration.
Implementation Method 1
an inverter configured to receive DC power and convert the DC power into AC power
Implementation Method 2
a motor configured to provide driving force
Implementation Method 3
the at least one planetary gear may be engaged with the input gear and the output gear to receive the driving force from the input gear and transmit the driving force to the output gear
Implementation Method 4
a first bearing for concentrically supporting the input gear and the output gear may be provided between the input gear and the output gear
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A driving motor system and a driving system of an electric mobility are provided. The driving motor system may comprise: an inverter configured to receive DC power and convert the DC power into AC power; a motor configured to provide driving force; and a reducer configured to increase the driving force provided by the motor and transmit the driving force to aa wheel of the electric mobility, wherein the motor and the reducer are installed inside a motor housing.