Rotating Electrical Machine Radial Terminal Block Integration
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Solution Overview
Problem
Conventional rotating electrical machines face space constraints due to the axial extension of terminal blocks and the need for separate assembly direction conversion structures, which increases radial dimensions and complicates installation between power transmission paths in vehicles.
Innovation Solution
A rotating electrical machine design featuring a stator with a core annularly arranged around the rotor, a coil with minimized axial protrusion, an insulator with groove portions for bus bars, and a terminal block housing integrated with the insulator to minimize axial and radial protrusion, allowing for space-saving and weight reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the terminal block extends in the axial direction to connect external power supply, then the electrical connection is achieved, but the axial dimension of the rotating electrical machine increases
Solution Approach 1:
The patent changes the arrangement dimension of the terminal block from axial direction to radial direction. The terminal block is positioned on the outer peripheral side of the coil end in the radial direction, allowing electrical connection without extending the axial dimension of the motor generator.
2Ease of operation
If a separate assembly direction conversion terminal block is used to install cable in arbitrary direction, then the ease of assembly is improved, but the radial dimension of the entire rotating electrical machine becomes large
Solution Approach 1:
The patent merges the terminal block with the insulator as an integrated structure. The terminal block is provided on the outer peripheral side of the coil end, and the insulator is positioned between the coil end and the terminal block, combining multiple functions into a single integrated component that reduces radial dimension.
Solution Approach 2:
The insulator serves multiple functions: it provides electrical insulation between the coil end and terminal block, structurally supports the terminal block, and helps minimize the radial protrusion by integrating with the terminal block structure.
3Device complexity
If the terminal block is arranged in the outer side in axial direction, then the electrical connection is simplified, but the space in axial direction is limited when arranged between power transmission paths
Solution Approach 1:
The patent relocates the terminal block from axial direction to radial direction arrangement. The terminal block is positioned on the outer peripheral side of the coil end in the radial direction, enabling electrical connection while minimizing axial space occupation for installation between power transmission paths.
Data Source
AI summary
A rotating electrical machine includes a rotor; a stator having a core annularly arranged facing the outer peripheral surface of the rotor, a coil wound around the core and having a coil end formed protruding from an end surface in the axial direction of the core, and an insulator formed on the end surface in the axial direction of the core and insulating the core and the coil; a bus bar arranged on the outer peripheral side of the coil end of the stator; and a terminal block installed on the outer peripheral side of the bus bar for introducing an electric current from an external power source to the stator, and the insulator has a groove portion in which the bus bar is held, and a terminal block housing portion in which the terminal block is held.