Bus-Bar Wiring Structure for Parallel Coil Connection
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Solution Overview
Problem
Conventional bus-bar structures for wiring coils in motors are cumbersome and prone to electrical interference, making parallel wiring difficult and time-consuming, especially when connecting multiple coils to a neutral point.
Innovation Solution
A stator with a bus-bar wiring structure that allows sequential winding of coils around all teeth, using a method where one coil is wound continuously around multiple teeth without cutting, and then the ends are wired to bus-bars, simplifying the process and reducing electrical interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional bus-bar structures are used to wire coils in parallel, then electrical connection is achieved, but the wiring process becomes cumbersome and time-consuming
Solution Approach 1:
The bus-bar structure is divided into multiple insertion holes positioned at different heights, allowing coils to be inserted at different levels. This segmentation enables parallel wiring of multiple coils simultaneously without interference, significantly improving wiring speed while maintaining structural organization
Solution Approach 2:
The invention transitions from a single-level bus-bar connection to a multi-level structure with insertion holes at different heights. By adding the vertical dimension to the wiring structure, multiple coils can be connected in parallel without spatial interference, resolving the complexity issue while enhancing productivity
2Ease of operation
If coil end portions are inserted into bus-bar holes, then electrical connection is established, but coil ends interfere with each other during insertion
Solution Approach 1:
The bus-bar is segmented into multiple insertion holes at different heights, allowing coil ends to be inserted at separate vertical positions. This prevents coil ends from interfering with each other during insertion while establishing proper electrical connections for parallel wiring
Solution Approach 2:
The multi-level bus-bar structure acts as an intermediary that separates coil ends spatially at different heights, preventing direct interference between coils while still providing the necessary electrical connection path to the neutral point
3Reliability
If multiple coils are wired in parallel to a neutral point, then electrical characteristics are improved, but the number of wiring operations increases
Solution Approach 1:
Multiple coil connections to the neutral point are merged into a single bus-bar structure with multiple insertion holes. This allows parallel wiring of multiple coils to be accomplished through one integrated component rather than multiple separate wiring operations, reducing time loss while maintaining reliable electrical characteristics
Data Source
AI summary
Disclosed is a method of wiring a coil in parallel around a stator having a plurality of teeth, which includes the steps of: winding the coil around a tooth starting from a top or a bottom of the stator; continuously winding the coil around an adjacent tooth when winding on the tooth is completed; cutting an end portion of the coil positioned at either the top or the bottom of the stator; wiring the cut end portion of the coil using a bus-bar; and wiring a neutral point to the other end of either the top or the bottom of the stator.