EV Drive Motor Inverter Bracket for Heat and Vibration Isolation
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Solution Overview
Problem
Existing drive motor systems in electric vehicles face challenges in integrating inverter components due to fixed assembly positions, leading to vibration transfer, overheating, and complexity in cooling systems, which affects durability and space efficiency.
Innovation Solution
A drive motor design with a changeable inverter housing position using an inverter coupling bracket that includes elastic vibration absorption and a compact cooling water circulation system, allowing flexible inverter placement and minimizing heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the inverter is directly assembled to the drive motor at a fixed position, then the degree of integration of parts per unit space is improved, but the vibration generated by the drive motor is transferred to the inverter, adversely affecting circuit parts and weakening durability
Solution Approach 1:
A vibration-absorbing bracket is introduced as an intermediary component between the drive motor and the inverter. This bracket includes vibration absorbing elements that capture and dissipate vibrations generated by the drive motor, preventing them from being transferred to the inverter and its sensitive circuit parts, while still maintaining the integrated assembly structure
Solution Approach 2:
The vibration-absorbing elements are pre-installed in the bracket to provide cushioning before vibrations can reach the inverter. This beforehand cushioning protects the circuit boards and other sensitive components from vibration-induced damage, ensuring durability while maintaining integration
2Device complexity
If the inverter is assembled only in one designated position of the drive motor, then the assembly structure is simplified, but when the interior space of the vehicle is changed, the structure of the inverter and drive motor needs to be changed to change the position accordingly
Solution Approach 1:
The bracket is designed with movable and adjustable features that allow the inverter's position to be dynamically changed relative to the drive motor. This enables adaptation to different vehicle interior spaces without requiring changes to the fundamental assembly structure, while maintaining ease of installation through the standardized bracket interface
Solution Approach 2:
The bracket serves multiple functions: it provides structural support, absorbs vibrations, and enables position adjustment. This multi-functionality allows the same basic assembly structure to accommodate different spatial requirements, improving versatility without increasing overall device complexity
3Temperature
If separate cooling water tanks and circulation pumps are installed for the drive motor and inverter, then overheating is prevented, but there are restrictions in installing cooling water tanks and additional components increase system complexity
Solution Approach 1:
The cooling systems of the drive motor and inverter are merged into a single integrated cooling circuit. This allows both components to be cooled by a common cooling water circulation system, eliminating the need for separate cooling water tanks and circulation pumps, thereby reducing system complexity while still preventing overheating of both components
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 design enhances the integration of vehicle parts, improves inverter durability by reducing vibration and overheating, and simplifies the cooling system, thereby preventing damage and optimizing space usage.
Implementation Method 1
an inverter coupling bracket (30) between the drive motor frame (11) and the inverter housing (20}, wherein the inverter coupling bracket (30) comprises an inverter housing surface-contacting frame (33) in which support gaps (31a and 32a) of first and second floor frames (31 and 32)... and an elastic member (310) made of a rubber material having a cushioning force
Implementation Method 2
a cooling tube or a cooling water circulation passage is installed and formed to prevent the overheating
Implementation Method 3
a cooling water circulation passage is installed and formed to prevent the overheating
Data Source
AI summary
A drive motor includes an inverter housing mounted therein, which couples an inverter housing to the top or side of a drive motor frame, wherein the inverter coupling bracket includes an inverter housing surface-contacting frame in which support gaps of first and second floor frames, surface-contacting the circumferential surface of a flange coupled to one end of the drive motor frame and the circumferential surface of a bracket coupled to the other end of the drive motor frame in the longitudinal direction, are integrally formed, and an arc-shaped drive motor frame circumferential surface-contacting portion is formed on the lower surface of the inverter housing surface-contacting frame, fixing pieces inclined inward are formed at the left and right ends of the first and second floor frames, respectively, and a fixing protruding piece is formed at each of the front and rear ends of the inverter housing surface-contacting frame.