Grooved Bus Bar Assembly for Equal Phase Resistance
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Solution Overview
Problem
Conventional motor bus bar assemblies with integrally provided bus bars and terminals face challenges in equalizing wire resistance values due to varying terminal positions, leading to uneven torque, overheating, and decreased efficiency.
Innovation Solution
A bus bar assembly with arc-shaped body portions of different lengths and diameters, layered in a radial direction, and terminals with groove portions to equalize interwire resistance values, eliminating the need for separate bus bar and terminal connection operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bus bar and terminal are integrally provided, then the assembly process is simplified, but the wire resistance values between bus bars become different due to non-uniform terminal spacing
Solution Approach 1:
The patent applies local quality by providing groove portions at specific locations on the bus bar body portions. These groove portions are strategically positioned to compensate for the non-uniform terminal spacing, creating local modifications that equalize the overall wire resistance values across all phases despite the integral construction simplifying assembly.
2Manufacturing precision
If the fusing portion is equally disposed, then the wire resistance values are equal, but the assembly process becomes complicated due to separate connection operations
Solution Approach 1:
The patent merges the bus bar and terminal into a single integral component, eliminating the need for separate connection operations. This combining approach simplifies the assembly process while the groove portions are designed to maintain equal wire resistance values, thus resolving the contradiction between assembly simplicity and resistance equality.
3Device complexity
If the terminal positions are fixed, then the terminal structure is simple, but it is difficult to dispose fusing portions at equal intervals, resulting in different wire resistance values
Solution Approach 1:
The patent maintains simple fixed terminal positions while introducing groove portions on the bus bar body at specific locations. These local modifications compensate for the fixed terminal spacing, ensuring that wire resistance values remain equal across all phases without complicating the terminal structure itself.
Data Source
AI summary
Disclosed herein is a bus bar assembly. The bus bar assembly according the present embodiment includes a plurality of arc-shape body portions provided with different lengths and disposed to be layered in a radial direction, coil connection portions formed integrally with the body portions and provided at predetermined intervals on outer peripheral surfaces of the body portions, and connected to a stator coil, and terminals formed integrally with the body portions and protruding from one end side of each of the body portions in an axial direction, and disposed to be layered in a horizontal direction, wherein one or more groove portions are provided in at least one of the terminals so that wire resistance values between the body portions are equalized.