Motor Stator Substrate Attachment Using Distributed Insulator Pins
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Solution Overview
Problem
Existing motor designs face increased costs due to larger substrate sizes as stator diameters increase, necessitating larger outer substrate sizes and increased distances between substrate attachment pins, which complicates wire routing and winding.
Innovation Solution
The motor design incorporates substrate attachment pins on specific teeth of the stator, allowing for stable substrate securing without enlarging the substrate size, thus reducing costs and maintaining efficient wire routing and winding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the stator diameter is increased to improve motor efficiency, then the motor efficiency is improved, but the substrate outer size must be enlarged which increases substrate cost
Solution Approach 1:
The substrate attachment function is segmented across multiple teeth (1st, 3rd, and 5th teeth) rather than requiring a continuous large substrate. By distributing attachment pins across these specific teeth, the substrate can be smaller while still achieving stable attachment to the stator, thus resolving the contradiction between stator size and substrate size.
2Power
If substrate attachment pins are positioned at the outer periphery to maximize stator core dimensions, then motor efficiency is improved, but the distance between attachment pins increases requiring larger substrate
Solution Approach 1:
Instead of placing all attachment pins at the outer periphery in a linear arrangement, the invention utilizes the radial and circumferential dimensions by selecting specific teeth (1st, 3rd, and 5th) around the stator circumference. This dimensional distribution allows pins to be spaced across different angular positions, effectively reducing the linear distance any single substrate section must span while maintaining optimal stator core dimensions.
Data Source
AI summary
A motor includes a stator to which a substrate can be stably secured without increasing the size of the substrate. An air-conditioning apparatus includes the motor. At an end portion of the stator in the axial direction thereof, a substrate on which electronic components are mounted is provided. The stator includes: a stator core formed by stacking electromagnetic steel sheets, and including a plurality of teeth; insulators provided on the stator core; and a wire wound around the teeth, the teeth being coated with the insulators. The insulators have outer walls provided on respective core backs of the stator core. In a linearly developed state of the stator, where of the teeth, an outermost tooth is a first tooth, a tooth adjacent to the first tooth is a second tooth, another tooth adjacent to the second tooth is a third tooth, another tooth adjacent to the third tooth is a fourth tooth, and another tooth adjacent to the fourth tooth is a fifth tooth, the outer walls of the first, third and fifth teeth include respective substrate attachment pins for use in attachment of the substrate, and the outer walls of the first tooth include respective power terminals for use in supplying power to the wire.