CN-121984259-A - Solid rotor structure and induction motor

CN121984259ACN 121984259 ACN121984259 ACN 121984259ACN-121984259-A

Abstract

The invention belongs to the technical field of motors, and provides a solid rotor structure and an induction motor, wherein the solid rotor structure comprises a rotating shaft and a rotor connected to the rotating shaft, the rotor is a conductive magnetizer, two groups of spaced or connected groove groups are arranged on the rotor along the axial direction, each groove group comprises at least two groups of spaced or connected groove groups, the groove groups comprise a plurality of grooves which are distributed at equal intervals along the axial direction of the rotor, adjacent groove groups in each group of groove groups are staggered by a first angle along the first rotating direction of the rotor, and the middle parts of the rotors are respectively positioned at two adjacent groove groups of different groove groups and staggered by a second angle along the first rotating direction of the rotor.

Inventors

DI CHONG
LI JIANGANG
WANG JUNHAO
LI RONGZE

Assignees

合肥工业大学

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (9)

1. The solid rotor structure comprises a rotating shaft and a rotor connected to the rotating shaft, and is characterized in that the rotor is a conductive magnetizer, two groups of spaced or connected groove groups are arranged on the rotor along the axial direction, each groove group comprises at least two groups of spaced or connected groove groups, and each groove group comprises a plurality of grooves which are distributed along the axial direction of the rotor at equal intervals; wherein, in each group of groove groups, adjacent groove groups are staggered by a first angle along a first rotation direction of the rotor; the middle part of the rotor is respectively positioned at a second angle of staggering two adjacent groove groups of different groove groups along the first rotating direction of the rotor.
2. The solid rotor structure of claim 1, wherein the first angle is recorded as , ; Wherein, the , Torque ripple times for the rotor to rotate through 360 ° mechanical degrees.
3. The solid rotor structure of claim 1, wherein the second angle is recorded as , ; Wherein, the For the total number of slots in each of the slot sets, The pole pair numbers of the motor are applied to the rotor.
4. The solid rotor structure of claim 1, wherein the rotor is divided into a plurality of sections in the axial direction, and only one groove group is arranged on each section, and grooves of the groove groups penetrate through two end faces of each section in the axial direction.
5. The solid rotor structure of claim 4, wherein the shaft and the rotor are fixed by a positioning key and a positioning groove.
6. The solid rotor structure of claim 1, wherein the outer diameter of the rotor ; Wherein, the Is the magnetic permeability of the vacuum and is equal to the magnetic permeability of the vacuum, Is the relative magnetic permeability of a solid rotor, Is the coefficient of the end of the solid rotor, In order to be of electrical conductivity, To match the stator power frequency of a solid rotor, Is slip.
7. The solid rotor structure of claim 1, wherein the outer diameter of the rotor And the length of the rotating shaft Satisfies the condition , The value of the product is 1 to 4, wherein, The pole pair numbers of the motor are applied to the rotor.
8. The solid rotor structure of claim 1, wherein the slot has a slot width Sum groove depth The ratio of (2) is 0.05-0.1.
9. An induction machine comprising a stator and a solid rotor structure according to any one of claims 1 to 8, said stator being located outside the solid rotor structure, the total number of slots in each of said slot groups being The pole pair number of the induction motor is The number of slots of the stator is Satisfies the condition that 。

Description

Solid rotor structure and induction motor Technical Field The invention belongs to the technical field of motors, and particularly relates to a solid rotor structure and an induction motor. Background The solid rotor induction motor has the characteristics of compact structure, reliable operation, low maintenance cost, strong overload capacity and the like, is impact-resistant and high-temperature-resistant, has no vulnerable parts such as conducting bars and the like, can adapt to various working conditions, and is widely applied to industrial scenes such as general mechanical transmission, pump body driving, fan operation and the like. In the solid rotor induction motor, the slotted solid rotor induction motor has overlarge stray loss caused by a harmonic magnetic field, so that the motor efficiency is reduced and the service life is influenced. The prior art patent application CN120200393A discloses a solid rotor structure of a high-speed induction motor and the motor, the solid rotor structure of the induction motor adopts equal slot matching and divides the rotor into two sections, the two sections of rotor slots are staggered by a certain angle, synchronous additional torque can be weakened, the starting performance of the motor is improved, electromagnetic vibration is weakened, the defect that the torque pulsation is overlarge still exists in the structure, and stray loss, torque pulsation and electromagnetic vibration balance cannot be considered. Disclosure of Invention The application provides a solid rotor structure for solving the technical problem that the slotted solid rotor adopted by the solid rotor induction motor cannot balance stray loss, torque pulsation and electromagnetic vibration, and aims to reduce the stray loss, inhibit the torque pulsation and weaken low-order radial electromagnetic exciting force caused by stator and rotor tooth harmonic waves, so that the whole electromagnetic vibration level of the motor is inhibited. The specific technical scheme is as follows: The solid rotor structure comprises a rotating shaft and a rotor connected to the rotating shaft, wherein the rotor is a conductive magnetizer, two groups of groove groups which are spaced or connected are arranged on the rotor along the axial direction, each groove group comprises at least two groups of groove groups which are spaced or connected, and each groove group comprises a plurality of grooves which are distributed at equal intervals along the axial direction of the rotor; wherein, in each group of groove groups, adjacent groove groups are staggered by a first angle along a first rotation direction of the rotor; the middle part of the rotor is respectively positioned at a second angle of staggering two adjacent groove groups of different groove groups along the first rotating direction of the rotor. According to the solid rotor structure provided by the invention, the first angle is recorded as,; Wherein, the ,Torque ripple times for the rotor to rotate through 360 ° mechanical degrees. According to the solid rotor structure provided by the invention, the second angle is recorded as,; Wherein, the For the total number of slots in each of the slot sets,The pole pair numbers of the motor are applied to the rotor. According to the solid rotor structure provided by the invention, the rotor is divided into a plurality of sections along the axial direction, each section is provided with only one groove group, and the grooves of the groove groups penetrate through two end surfaces of each section along the axial direction. According to the solid rotor structure provided by the invention, the rotating shaft and the rotor are fixed in a matched manner through the positioning key and the positioning groove. According to the solid rotor structure provided by the invention, the outer diameter of the rotor; Wherein, the Is the magnetic permeability of the vacuum and is equal to the magnetic permeability of the vacuum,Is the relative magnetic permeability of a solid rotor,Is the coefficient of the end of the solid rotor,In order to be of electrical conductivity,To match the stator power frequency of a solid rotor,Is slip. According to the solid rotor structure provided by the invention, the outer diameter of the rotorAnd the length of the rotating shaftSatisfies the condition,The value of the product is 1 to 4, wherein,The pole pair numbers of the motor are applied to the rotor. According to the solid rotor structure provided by the invention, the groove width of the grooveSum groove depthThe ratio of (2) is 0.05-0.1. The invention also provides an induction motor, which comprises a stator and a solid rotor structure of any one of the above, wherein the stator is positioned outside the solid rotor structure, and the total number of the grooves in each groove group isThe pole pair number of the induction motor isThe number of slots of the stator isSatisfies the condition that。 The beneficial effects of the invention are as