CN216564686U

CN216564686U - Low-loss motor rotor structure

Info

Publication number: CN216564686U
Application number: CN202123274353.5U
Authority: CN
Inventors: 谢鹏程; 杨双力; 郝运会; 丁晨; 郭艳; 钱琦; 何嘉峰; 张翠; 冯李杰; 周俞卿
Original assignee: Wuxi City Hengda Electric Motors Co ltd
Current assignee: Wuxi City Hengda Electric Motors Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-17
Anticipated expiration: 2031-12-24

Abstract

The utility model relates to a low-loss motor rotor structure which comprises a rotor core, wherein a plurality of conducting bar grooves are uniformly distributed along the circumference of the rotor core, a rotor conducting bar is arranged in each conducting bar groove, end rings are arranged at two ends of the rotor core, and grooves are formed in the joints of the end rings and the rotor conducting bars. The utility model has the advantages that: the rotor structure design of the utility model can control the starting current of the motor within a reasonable range while increasing the sectional area of the rotor conducting bar and reducing the resistivity of the conducting bar, thereby solving the problem of large starting current of the high-efficiency motor; the skin effect characteristic of the motor during starting is utilized to increase the resistance of the rotor during starting, so that the starting current of the motor is reduced, the low resistance of the rotor is realized during normal operation of the motor, the loss of the rotor is reduced, and the low loss and the high efficiency of the motor are realized.

Description

Low-loss motor rotor structure

Technical Field

The utility model relates to a low-loss motor rotor structure, in particular to a low-loss motor rotor end ring.

Background

The research and development of high-efficient low-loss motor generally centers on the motor loss and carries out analysis, and the measures generally taken in the prior art are as follows: the grade of the silicon steel sheet is improved to reduce iron loss, the sectional area of the conducting wire is increased to reduce copper loss of the stator, and the resistivity of the rotor conducting bar is reduced to reduce copper loss of the rotor.

However, when the resistivity of the rotor conducting bar is reduced, the starting current of the motor is increased, the power grid is impacted by the excessive starting current, and circuit loss is seriously caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a low-loss motor rotor structure, which aims to overcome the defects in the prior art, and reduces the motor loss and the starting current through a novel rotor end ring structure.

The technical solution of the utility model is as follows: the utility model provides a low-loss motor rotor structure, its structure includes rotor core, follows rotor core circumference equipartition have a plurality of conducting bar grooves, every conducting bar inslot is equipped with a rotor conducting bar, the rotor core both ends are equipped with the end links, the end links is equipped with the recess with rotor conducting bar junction.

Preferably, the depth of the groove is 1/5 the height of the rotor conducting bar, and the width of the groove is 2 mm.

The utility model has the advantages that: the rotor structure design of the utility model can increase the sectional area of the rotor conducting bar and reduce the resistivity of the conducting bar, and simultaneously control the starting current of the motor within a reasonable range, thereby solving the problem of large starting current of the high-efficiency motor; the skin effect characteristic of the motor during starting is utilized to increase the resistance of the rotor during starting, so that the starting current of the motor is reduced, the low resistance of the rotor is realized during normal operation of the motor, the loss of the rotor is reduced, and the low loss and the high efficiency of the motor are realized.

Drawings

Fig. 1 is a schematic structural diagram of a rotor structure of a low-loss motor according to the present invention.

Fig. 2 is a side perspective view of fig. 1.

In the figure, 1 is an end ring, 2 is a rotor bar, 3 is a groove, and 4 is a rotor core.

Detailed Description

The present invention will be described in further detail with reference to examples and specific embodiments.

As shown in fig. 1 and 2, a low-loss motor rotor structure includes a rotor core 4, a plurality of bar slots are uniformly distributed along the circumference of the rotor core 4, a rotor bar 2 is arranged in each bar slot, end rings 1 are arranged at two ends of the rotor core 4, and grooves 3 are arranged at the joints of the end rings 1 and the rotor bars 2.

The depth of the groove 3 is preferably 1/5 the height of the rotor bar 2 and the width is preferably 2 mm.

According to the skin effect when the motor is started, the current tends to the upper part of the rotor conducting bar 2 in the starting process of the motor, the groove 3 can increase the rotor resistance by more than 50% when the motor is started, the starting current is effectively reduced by 30%, when the skin effect is removed after the motor is started, the current in the rotor conducting bar 2 is distributed downwards, the contact area between the end ring 1 and the rotor conducting bar 2 is increased, the rotor resistance is reduced, the copper consumption of the rotor is reduced, and the efficiency of the motor is improved.

All the above components are prior art, and those skilled in the art can use any model and existing design that can implement their corresponding functions.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a low-loss motor rotor structure, its structure includes rotor core (4), its characterized in that follows rotor core (4) circumference equipartition have a plurality of conducting bar grooves, be equipped with a rotor conducting bar (2) in every conducting bar inslot, rotor core (4) both ends are equipped with end links (1), and end links (1) and rotor conducting bar (2) junction are equipped with recess (3).

2. A low loss motor rotor structure as claimed in claim 1, characterized in that the depth of the grooves (3) is 1/5 mm of the height of the rotor bars (2) and 2mm of the width.