Motor and compressor
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Solution Overview
Problem
The existing design of electric motors in compressors, with connection members disposed on the inverter side, leads to an increased axial length, which is problematic for installations in vehicles where space is limited.
Innovation Solution
The connection member is positioned within a stator having a cylindrical shape, utilizing a connection member with a side wall part, bottom part, and terminal space, allowing for efficient placement and reducing the axial length of the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the connection member is disposed on the end portion on the inverter side of the motor, then the electrical connection is simplified, but the axial length of the motor increases
Solution Approach 1:
The connection member is nested within the stator structure, specifically positioned in the radial direction rather than extending axially. The bottom part of the connection member is disposed radially inward of the outer wall part of the electrical insulation body, allowing the connection function to be integrated into the existing stator volume without increasing axial length.
Solution Approach 2:
The connection member is repositioned from the axial direction to the radial direction. Instead of extending the motor axially to accommodate the connection member, the invention utilizes the radial space within the stator, changing the dimensional orientation of the connection structure to resolve the space conflict.
2Ease of operation
If the connection member is disposed on the end portion on the inverter side, then the lead wire connection is facilitated, but the compressor size increases
Solution Approach 1:
The connection member is nested within the stator assembly, utilizing the internal radial space between the outer wall part of the electrical insulation body and the center of the stator. This nesting approach allows the connection function to be integrated without adding external volume to the compressor.
Solution Approach 2:
The connection structure transitions from an axial arrangement to a radial arrangement, utilizing the radial dimension of the stator instead of extending axially. This dimensional change allows the connection member to be positioned within the existing stator footprint, reducing overall compressor volume.
3Length of moving object
If the connection member is positioned radially inward of the outer wall part, then the axial length is reduced, but the positioning space becomes more constrained
Solution Approach 1:
The connection member is positioned in a specific local region within the stator - radially inward of the outer wall part of the electrical insulation body. This localized positioning utilizes the available radial space at a specific location rather than requiring general axial extension, allowing precise placement in a constrained but sufficient space.
Solution Approach 2:
The solution moves the connection member from the axial dimension to the radial dimension, utilizing the radial space within the stator that would otherwise be unused. This dimensional transition transforms a constrained axial situation into a viable radial positioning solution.
Data Source
AI summary
A motor (310) includes a stator (100; 100b; 100c; 100d; 100e), and a connection member (52) configured to hold at least one connection terminal (94). An electrical insulation body (70; 70b; 70c; 70d; 70e) includes at least one drum part (714) disposed on an end portion on a first side in an axial direction (DZ) of a tooth base part (842), and at least one inner wall part (716) disposed on an end portion on the first side in the axial direction of a tooth tip part (844). The connection member is disposed on the first side in the axial direction of the stator. A bottom part (528; 558) is disposed in a first region (H1) that is radially inward of an outer wall part (712), and is disposed further toward a second side in the axial direction than an outer apex part (712T) of the outer wall part.