Permanent magnet synchronous motor with magnetism concentration effect

Abstract

The invention relates to a permanent magnet synchronous motor with a magnetism concentration effect, which comprises a stator and a rotor, wherein the stator includes a spliced stator core and a stator winding, the spliced stator core is an annular body composed of a plurality of sub-cores uniformly distributed around the rotor, two adjacent sub-cores are provided with a stator gap therebetween, each sub-core is provided with two wire slots at the side opposite to the rotor, the part between the two wire slots of the same sub-core form a winding tooth, the top of the winding tooth and the topof the non-winding tooth are the same in width, and the tooth width of the non-winding tooth is equal to the sum of the tooth width of the winding tooth and the width of the stator gap. The permanentmagnet synchronous motor adopts the spliced stator core, thereby not only simplifying the motor structure, reducing the transportation, installation and maintenance difficulty, but also being capableof avoiding a short circuit between phases and improving the fault-tolerant ability of the motor. The spliced stator core also improves the winding factor and generates a magnetism concentration effect, thereby improving the torque density and operation efficiency of the motor.

Description

technical field [0001] The invention relates to a portable permanent magnet synchronous motor with strong fault tolerance, high torque density and high operating efficiency, belonging to the technical field of synchronous generators. Background technique [0002] High-performance permanent magnet synchronous motors have received more and more attention in the field of industrial engineering due to their advantages of small size, torque density and high operating efficiency. With the emergence of new permanent magnet materials and the continuous development of large permanent magnet motor manufacturing technology in recent years, the stand-alone capacity of permanent magnet motors has continued to increase. However, in low-speed applications, the shortcomings of the traditional one-piece stator core integer slot distributed winding permanent magnet motor gradually become prominent. This kind of motor has a large number of poles, which increases the number of stator slots, wh...

AI Technical Summary

Problems solved by technology

However, in low-speed applications, the shortcomings of the traditional one-piece stator core integer slot distributed winding permanent magnet motor gradually become prominent

This kind of motor has a large number of poles, which increases the number of stator slots, which increases the difficulty of design and processing. In addition, the end of the distributed winding is longer, resulting in a higher amount of copper and an increase in interphase insulation materials. The dosage and the copper consumption when the motor is running

With the increase of the single unit capacity of the traditional motor, the difficulty of transportation, assembly and maintenance of the motor will gradually increase. At the same time, the motor will have a larger volume, which will increase the iron consumption of the motor during operation and reduce the operating efficiency of the motor. Therefore it is necessary to improve

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