Stator punching sheet and direct-current frequency conversion motor with same

Abstract

The invention discloses a stator punching sheet and a direct-current frequency conversion motor with the stator punching sheet. The stator punching sheet comprises a stator yoke, wherein the stator yoke is provided with a rotor hole and six line inserting grooves communicated with the rotor hole, the six line inserting grooves are distributed at equal intervals in the circumferential direction of the rotor hole, and a semi-closed opening is formed by the groove opening of each line inserting groove and formed in the rotor hole. The stator punching sheet is simple and reasonable in structure and convenient to machine, the yoke density of the line inserting grooves is more uniform while it is guaranteed that materials are saved, the phenomenon that the local magnetic flux density of the stator yoke is overhigh is avoided, performance of the stator punching sheet is improved, the COP of a compressor with the stator punching sheet can reach more than 1.9, the rotating speed of the compressor is controllable, and the magnetic flux density is distributed more reasonably.

Description

technical field [0001] The invention relates to the technical field of refrigeration, and more specifically, to a stator punch and a DC variable frequency motor having the same. Background technique [0002] The refrigerator compressor is the heart of the refrigerator refrigeration system. The performance and quality of its driving motor are very important. The motor should not only work stably in the compressor for a long time, but also achieve the best match with the compressor body, so as to improve the performance index of the compressor. Get the best economic benefit. At present, most refrigerator compressor motors use single-phase AC motors. Although the motor is relatively simple in production, the motor efficiency is not high. The COP value of ordinary single-phase AC motors is not greater than 1.90. The defect of single-phase motors is the speed It is uncontrollable and can only run at one speed, and the rotor of the motor is made of cast aluminum die-casting. The ...

AI Technical Summary

Problems solved by technology

At present, most refrigerator compressor motors use single-phase AC motors. Although the motor is relatively simple in production, the motor efficiency is not high. The COP value of ordinary single-phase AC motors is not greater than 1.90. The defect of single-phase motors is the speed It is uncontrollable and can only run at one speed, and the motor rotor is made of cast aluminum die-casting, the performance of the motor is largely restricted by the die-casting quality of the rotor

[0003] In the prior art, due to the limitation of the structure of the refrigerator compressor motor, and in order to save silicon steel sheets, the stator mostly adopts a rectangular structure, in which one group of parallel line segments is longer and the other group of parallel line segments is shorter. At the same time, the yoke width of the straight part of the outer contour is much smaller than that of the chamfered part, resulting in the yoke density of the straight part of the outer contour being much larger than that of the outer chamfered part, which not only affects the output power of the motor, but also affects the performance of the motor

For refrigerator compressor high-efficiency motors, when the COP is 1.85-2.1 energy efficiency, it is difficult for fixed-speed motors to achieve such high energy efficiency

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