Electric Compressor Inverter Bus Bar Layout for Compact Wiring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inverters and electric compressors face challenges in reducing size due to the structural constraints imposed by wiring connections between the inverter and the motor.
Innovation Solution
The inverter design incorporates a substrate, power semiconductor, bus bar, and fixing unit with a through-hole configuration that allows the bus bar fixing screw to be inserted through the motor unit, reducing the axial dimension of the inverter and enabling efficient electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the inverter and motor are connected by wiring, then electrical connection is achieved, but the inverter size cannot be reduced due to wiring structure constraints
Solution Approach 1:
The bus bar is integrated directly into the inverter housing, merging the electrical connection component with the structural housing. This eliminates separate wiring structures and reduces the overall inverter size while maintaining electrical connectivity between the inverter and motor.
Solution Approach 2:
The inverter housing serves multiple functions: it provides structural enclosure, acts as a mounting structure for the bus bar, and facilitates electrical connection to the motor. This multi-functionality reduces the need for additional components and reduces overall size.
2Productivity
If a bus bar is used for electrical connection, then connection efficiency is improved, but the structure becomes more complex
Solution Approach 1:
The bus bar is combined with the inverter housing into a single integrated structure. This merging reduces the number of separate components and simplifies the overall structure while maintaining efficient electrical connection capabilities between the inverter and motor.
3Volume of moving object
If the fixing unit is inserted into the through-hole of the motor unit, then the inverter size is reduced, but the positioning precision requirement increases
Solution Approach 1:
The fixing unit utilizes the existing through-hole structure of the motor unit for both passage and positioning functions. The through-hole itself serves as the positioning feature, eliminating the need for additional positioning mechanisms and reducing manufacturing precision requirements while enabling inverter size reduction.
Data Source
AI summary
This inverter provides power to a motor of a motor unit, and comprises a substrate, a power semiconductor which is mounted on the substrate, a bus bar which has a first terminal that is mounted on the substrate and a second terminal that is on the opposite side to the first terminal, and a fixing part in which is fixed a fixing screw of the bus bar that couples a motor cable of the motor unit and the second terminal, wherein the fixing part is inserted in a through hole of the motor unit through which the motor cable passes.