CN212518578U

CN212518578U - Rotor unit and hybrid excitation motor

Info

Publication number: CN212518578U
Application number: CN202021544047.1U
Authority: CN
Inventors: 邹其轩; 邹兆林; 刘闯
Original assignee: Jiangsu Yineng Motors Co ltd
Current assignee: Jiangsu Yineng Motors Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-02-09
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses a rotor unit and hybrid excitation motor in the motor technical field, including motor shaft, support piece, rotor, support piece is provided with the through-hole one that matches with the motor shaft along the axle center, and the support piece outer peripheral face matches with the rotor inner peripheral surface, and support piece cup joints in the motor shaft, and the rotor cup joints in support piece, and support piece is non-magnetic material. The motor shaft and the rotor of the rotor unit are separated by the non-magnetic-conductive support piece, so that an axial magnetic circuit is prevented from passing through the motor shaft, the magnetic leakage is reduced, and the motor performance is improved; and meanwhile, the selectable range of the material of the motor shaft is expanded without being limited by non-magnetic materials.

Description

Rotor unit and hybrid excitation motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to rotor unit and hybrid excitation motor.

Background

The stator and rotor cores of the common synchronous motor are all formed by laminations, the magnetic circuit of the stator and rotor is only a radial magnetic circuit, and the magnetic flux passing through the rotor cannot form a closed loop through a shaft, so that the shaft of the motor only needs to consider factors such as strength and the like, and does not need to consider magnetic conductivity.

However, for a hybrid excitation motor with an axial magnetic circuit, the rotor is made of a solid core material, the motor has both a radial magnetic circuit and an axial magnetic circuit, if a magnetically conductive shaft is adopted at the moment, the permanent magnetic circuit can form a loop through a motor shaft, and great magnetic leakage is generated.

SUMMERY OF THE UTILITY MODEL

This application is through providing a rotor unit and hybrid excitation motor, thereby the problem of thereby the axle of having solved hybrid excitation motor among the prior art is easily magnetized by the magnet steel and is leaked the magnetic flux easily prevents that axial magnetic circuit from passing through the motor shaft to reduce the magnetic leakage, improved the motor performance.

The embodiment of the application provides a rotor unit, including motor shaft, support piece, rotor, support piece along the axle center be provided with the through-hole one that the motor shaft matches, the support piece outer peripheral face with the rotor inner peripheral surface matches, support piece cup joint in the motor shaft, the rotor cup joint in support piece, support piece is non-magnetic material.

The beneficial effects of the above embodiment are as follows: the motor shaft and the rotor are separated by the non-magnetic-conductive supporting piece, so that the motor shaft can be prevented from being magnetized by the magnetic steel, an axial magnetic circuit is prevented from passing through the motor shaft, the magnetic leakage is reduced, and the performance of the motor is improved; and meanwhile, the selectable range of the material of the motor shaft is expanded without being limited by non-magnetic materials.

In one embodiment of the present application, the rotor unit further includes magnetic steels, the rotor includes N-pole rotor and S-pole rotor that are alternately placed at intervals, and the magnetic steels are respectively placed between the N-pole rotor and the S-pole rotor.

In one embodiment of the present application, the outer circumferential surface of the support member and the inner circumferential surface of the rotor are respectively and correspondingly provided with a first key groove along the axial direction, and the outer circumferential surface of the support member and the inner circumferential surface of the rotor are in key connection. The mounting and dismounting between the supporting piece and the rotor are convenient.

In one embodiment of the present application, the inner circumferential surface of the support member and the outer circumferential surface of the motor shaft are respectively and correspondingly provided with a second key groove along the axial direction, and the inner circumferential surface of the support member and the outer circumferential surface of the motor shaft are in key connection. The assembly and disassembly between the supporting piece and the motor shaft are convenient.

In one embodiment of the present application, a plurality of second through holes are axially formed at one end of the supporting member, and the plurality of second through holes are equidistantly distributed around the axis of the supporting member. The cross section of the supporting piece is in a hub shape, so that the dead weight can be reduced on the basis of ensuring the rigidity.

The embodiment of the application also provides a hybrid excitation motor which comprises the rotor unit.

In one of the embodiments of this application, mixed excitation motor still include the casing, set up in the end cover at casing both ends and set up in stator core, rotor disc, the excitation support in the casing, the rotor unit set up in the casing, stator core encircles the rotor install in the casing, around there being armature winding on the stator core, the rotor disc is provided with two, two the rotor disc is located respectively the rotor both ends, the excitation support is provided with two, two the excitation support symmetry respectively install in the rotor both sides, the winding has excitation winding in the excitation support, the excitation support with rotor, rotor disc all have additional air gap, the bearing is installed respectively at motor shaft both ends. The hybrid excitation motor enables an axial magnetic circuit of the motor to start from a magnetic steel N/S pole through the non-magnetic-conductive supporting pieces at intervals, pass through a rotor N/S pole, a rotor disc, the excitation bracket and the rotor S/N pole and then return to the magnetic steel S/N pole, so that the magnetic circuit of the motor is prevented from passing through a motor shaft, and magnetic leakage is reduced; meanwhile, the material selectable range of the motor shaft is expanded without being limited by non-magnetic materials.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

1. the motor shaft and the rotor are separated by the non-magnetic-conductive support piece, so that the motor shaft is prevented from being magnetized by the magnetic steel, and an axial magnetic circuit is prevented from passing through the motor shaft, thereby reducing magnetic leakage and improving the performance of the motor;

2. the interval of the support frames without magnetic conduction is arranged, so that the material selectable range of the motor shaft is expanded without being limited by non-magnetic-conduction materials.

Drawings

FIG. 1 is a schematic view of a support member;

FIG. 2 is a schematic structural view of a rotor unit;

fig. 3 is a schematic structural diagram of a hybrid excitation motor.

The magnetic bearing comprises a motor shaft 1, a bearing 11, a support 2, a through hole I21, a key groove I22, a key groove I23, a key groove II 24, a through hole II 3, a rotor 31, an N pole rotor 32, an S pole rotor, magnetic steel 4, a stator core 5, a rotor disc 6, an excitation bracket 7, an excitation winding 8, a shell 91 and an end cover 92.

Detailed Description

The present invention will be further explained with reference to the following embodiments, which are to be understood as illustrative only and not as limiting the scope of the invention, and modifications of the various equivalent forms of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "vertical" and "outer peripheral surface" are used to indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the product of the present invention is usually placed when in use, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to be referred must have a specific position, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described herein can be combined and combined by those skilled in the art without conflicting aspects.

The embodiment of the application solves the problem that the shaft of the hybrid excitation motor is easily magnetized by magnetic steel and easily subjected to magnetic flux leakage in the prior art by providing the rotor unit and the hybrid excitation motor, prevents an axial magnetic circuit from passing through a motor shaft, reduces the magnetic flux leakage and improves the motor performance.

In order to solve the above problems, the technical solution in the embodiment of the present application has the following general idea:

the first embodiment is as follows:

as shown in fig. 1-2, a rotor unit includes a motor shaft 1, a support member 2, the rotor, magnet steel 4, support piece 2 is provided with the through-hole 21 that matches with motor shaft 1 along the axle center, 2 outer peripheral faces of support piece match with the rotor inner peripheral surface, support piece 2 cup joints in motor shaft 1, the rotor cup joints in support piece 2, support piece 2 is non-magnetic conductive material, 2 outer peripheral faces of support piece and rotor inner peripheral surface correspond respectively along the axial and have seted up keyway one 22, be provided with the parallel key one in the keyway one 22, 2 outer peripheral faces of support piece and rotor inner peripheral surface key-type connection, 2 inner peripheral faces of support piece and 1 outer peripheral surface of motor shaft correspond respectively along the axial and have seted up keyway two 23, be provided with the parallel key two in the keyway two 23, 2 inner peripheral faces of support piece and 1 outer peripheral surface key-type connection of motor shaft, the rotor.

Wherein, a plurality of fan-shaped through holes two 24 are seted up along the axial to support piece 2 one end, and a plurality of through holes two 24 encircle through hole one 21 equidistance interval distribution.

Example two:

as shown in fig. 3, a hybrid excitation motor includes a housing 91, end caps 92 disposed at two ends of the housing 91, and a rotor unit, a stator core 5, two rotor disks 6, and two excitation brackets 7 disposed in the housing 91 as in the first embodiment, where the stator core 5 is mounted on the housing 91 around the rotor 3, the stator core 5 is wound with armature windings, the two rotor disks 6 are disposed at two ends of the rotor 3, the two excitation brackets 7 are disposed, the two excitation brackets 7 are symmetrically mounted at two sides of the rotor 3, the excitation brackets 7 are wound with excitation windings 8, the excitation brackets 7, the rotor 3, and the rotor disks 6 have additional air gaps, and bearings 11 are mounted at two ends of the motor shaft 1.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A rotor unit is characterized by comprising a motor shaft, a supporting piece and a rotor, wherein the supporting piece is provided with a first through hole matched with the motor shaft along the axis, the outer peripheral surface of the supporting piece is matched with the inner peripheral surface of the rotor, the supporting piece is sleeved on the motor shaft, the rotor is sleeved on the supporting piece, and the supporting piece is made of a non-magnetic material.

2. The rotor unit of claim 1, wherein: still include the magnet steel, the rotor is including crisscross interval placed N utmost point rotor and S utmost point rotor, the magnet steel place respectively in between N utmost point rotor and the S utmost point rotor.

3. The rotor unit of claim 1, wherein: the outer peripheral surface of the supporting piece and the inner peripheral surface of the rotor are respectively provided with a first key groove along the axial direction, and the outer peripheral surface of the supporting piece is in key connection with the inner peripheral surface of the rotor.

4. The rotor unit of claim 1, wherein: and the inner peripheral surface of the supporting piece and the outer peripheral surface of the motor shaft are respectively provided with a second key groove along the axial direction, and the inner peripheral surface of the supporting piece is in key connection with the outer peripheral surface of the motor shaft.

5. The rotor unit of claim 1, wherein: a plurality of second through holes are formed in one end of the supporting piece in the axial direction, and the second through holes are distributed around the axis of the supporting piece at equal intervals.

6. A hybrid excited machine comprising a rotor unit as claimed in any one of claims 1 to 5.

7. The hybrid excitation motor of claim 6, wherein: still include the casing, set up in the end cover at casing both ends and set up in stator core, rotor disc, the excitation support in the casing, the rotor unit set up in the casing, stator core encircles the rotor install in the casing, the last armature winding that winds of stator core, the rotor disc is provided with two, two the rotor disc is located respectively the rotor both ends, the excitation support is provided with two, two the excitation support symmetry respectively install in the rotor both sides, the winding has the excitation winding in the excitation support, the excitation support with rotor, rotor disc all have additional air gap, the bearing is installed respectively at the motor shaft both ends.