Pole Tooth End Face Laminate for Magnet Pocket Assembly
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Solution Overview
Problem
Synchronous linear motors with embedded permanent magnets require a complex and labor-intensive production process due to the need for careful integration of pre-magnetized magnets, limiting the flexibility in assembly and increasing production effort.
Innovation Solution
Designing a pole tooth with two halves connected by an end face laminate to form a pocket for late magnet insertion, allowing for easier assembly steps and enabling winding before magnet insertion, with options for laminated cores and disconnectable pole shoes for modular construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-magnetized permanent magnets are embedded in pole teeth, then the motor achieves synchronous operation with magnets in the air gap, but the production process becomes very complex and labor-intensive
Solution Approach 1:
The pole tooth is divided into two separate halves that are assembled around the permanent magnet. This segmentation allows the magnet to be inserted between the two halves after the laminated cores are prepared, avoiding the need for complex pre-assembly operations and enabling a simpler, more modular production process while maintaining the synchronous motor functionality.
2Stability of the object's composition
If permanent magnets are inserted early in the production process, then the pole tooth structure is stable, but winding and fitting operations become difficult
Solution Approach 1:
The two pole tooth halves are assembled and fixed to each other using end face laminates before the permanent magnet is inserted. This preliminary assembly creates a stable structure with a defined pocket, allowing winding and fitting operations to be performed easily on the assembled pole tooth structure. The magnet is then inserted into the pre-formed pocket in a final step, combining structural stability with manufacturing ease.
3Manufacturing precision
If pole teeth are wound in the assembled state, then the winding fits precisely, but the production process becomes more complex
Solution Approach 1:
The pole tooth is segmented into two halves that are assembled around the permanent magnet. This segmentation enables the pole tooth to be wound in the assembled state with precise fit, as the two halves can be positioned accurately relative to each other using end face laminates. The segmented design simplifies the overall production process by allowing modular assembly and reducing the complexity of handling large assembled structures.
Data Source
AI summary
Electrical machines having pole teeth which can be equipped with a permanent magnet are intended to be capable of being assembled more easily. Provision is made for this purpose for two pole tooth halves (1,2) to be provided for each pole tooth, each of which two pole tooth halves has two opposing end sides. At least one end-side plate (3), which connects in each case one end side of the two pole tooth halves (1,2) to one another, is used for forming a pocket (5) between the two pole tooth halves (1,2), into which pocket a permanent magnet can be inserted. A space for the permanent magnet can therefore be kept free during assembly of the pole tooth or during winding thereof. Since the permanent magnet only needs to be inserted into the pocket (5) relatively late, the entire assembly process can be simplified.