Stator Insulation Cover, Motor Stator, and Motor

This invention provides a stator insulation cover, a motor stator, and a motor. The stator insulation cover is designed for use on the motor stator. It consists of multiple arc-shaped shells. Each shell includes an outer insulation section, a side insulation section, and an inner insulation section connected in sequence. The outer and inner insulation sections are arranged on the same side of the side insulation section, and they face each other at a distance.

These shells join circumferentially to form a ring. As a result, they create a ring-shaped cavity that houses the stator winding ends. The outer insulation sections cover the outer end faces of the stator winding ends. The side insulation sections cover their outer peripheral surfaces. Meanwhile, the inner insulation sections protect the inner end faces.

The stator insulation cover of this invention offers strong insulation protection. It also features a simple structure and is easy to manufacture. Moreover, it improves the production efficiency of motor stators. At the same time, it reduces the end size of stator windings, lowers production costs, and supports motor miniaturization.

Background Technology

A motor stator mainly consists of the stator core, stator windings, and an insulation system. In existing technologies, the ends of stator windings are often exposed. In other cases, manufacturers wrap them with insulating tape or polyester film. Some end insulation covers now provide overall insulation for the inner ring, outer ring, and top of the winding ends.

However, traditional insulation solutions involve complex processes and offer limited insulation performance. Additionally, to meet creepage-distance requirements, the winding ends must be large, which prevents motor miniaturization. Some end-cover designs also fail to insulate the winding ends near the stator core. Consequently, the insulation protection remains weak and the end height becomes excessive.

Arc-shaped stator insulation cover for motor stator winding protection and compact motor design

Content of the Invention

This invention aims to solve at least one of the technical problems found in the prior art. Therefore, one objective of the invention is to provide a stator insulation cover that delivers strong insulation performance, features a simple structure, and is easy to manufacture. It significantly improves production efficiency. Furthermore, it reduces the end size of stator windings, lowers overall production costs, and promotes motor miniaturization.

Structure of the Stator Insulation Cover

The stator insulation cover includes several arc-shaped shells. Each shell contains an outer insulation section, a side insulation section, and an inner insulation section arranged in sequence. The outer and inner insulation sections sit on the same side of the side insulation section and face each other at intervals.

All shells join circumferentially to form a complete ring. This ring defines a cavity that accommodates the stator winding ends. The outer insulation sections cover the outer end faces of the winding ends. The side insulation sections protect their outer peripheral surfaces. Finally, the inner insulation sections cover the inner end faces.

Stator insulation cover with multi-section arc shells providing full protection for motor stator winding ends

Advantages

The stator insulation cover according to the first aspect of the present invention offers the following advantages:

• Multiple arc-shaped shells sequentially assemble at the stator winding ends and form a circumferential ring. The annular enclosure cavity then covers the stator winding ends, preventing their direct exposure and providing effective insulation protection.
• Because the stator winding ends are distributed at both ends of the stator core, the inner insulating sections of the arc-shaped shells cover the inner end faces of the stator winding ends. These sections isolate the inner end faces from the stator core ends, allowing designers to reduce the clearance between them. This reduction minimizes the end dimensions of the stator windings, lowers production costs, and supports motor miniaturization.
• The arc-shaped shells use single-piece molding, which simplifies the manufacturing process and enables easy installation. This design effectively improves the production efficiency of the motor stator.