CN209896784U

CN209896784U - High-speed permanent magnet synchronous motor with stator main insulation water channel cooling system

Info

Publication number: CN209896784U
Application number: CN201921158573.1U
Authority: CN
Inventors: 汪冬梅; 梁艳萍
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-01-03
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a high-speed PMSM with stator main insulation water course cooling system, including stator frame and stator core and the rotor core of setting in the stator frame, be provided with stator core in the stator frame, rotor core set up stator core inner wall and with the stator core between leave the space, be provided with stator winding on the stator core, stator winding parcel has main insulation, the outer parcel of main insulation has stator main insulation water course. The utility model discloses simple structure, the cooling effect is good, has solved the poor problem of high-speed PMSM heat dissipation condition, has improved high-speed PMSM's operational reliability when reducing high-speed PMSM structure temperature rise.

Description

High-speed permanent magnet synchronous motor with stator main insulation water channel cooling system

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to high-speed PMSM with stator owner's insulating water course cooling system.

Background

The high-speed permanent magnet synchronous motor can be directly connected with a working machine or a load, has the advantages of small volume, high power density, high efficiency, fast dynamic response and the like, is widely applied to the industrial fields of centrifugal compressors, flywheel energy storage, vacuum pumps and the like and the military field of airplanes, aircraft carrier energy systems and the like, and becomes an object of competitive attention in various industries in view of the wide application prospect in the major industrial field and the national defense military field.

When the high-speed permanent magnet synchronous motor is designed, the requirements of electromagnetic performance and mechanical characteristics and the requirements of cooling and temperature rise need to be met. For a high-speed permanent magnet synchronous motor, due to the high rotating speed of the motor, the permanent magnet cannot bear the tensile stress generated by high-speed rotation, and protective measures must be taken for the permanent magnet. In view of the small size of the high-speed permanent magnet synchronous motor, the solid integral structure is adopted for the rotor, the loss density is large, the heat dissipation condition is poor, and the irreversible loss of the permanent magnet is easily caused, so that the effective heat dissipation and cooling mode is an effective means for ensuring that each structural component of the motor operates at lower temperature rise and improving the power of the motor, and becomes a key problem in the design of the high-speed permanent magnet synchronous motor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the problems in the prior art, the high-speed permanent magnet synchronous motor with the stator main insulation water channel cooling system is provided, the problem of poor heat dissipation condition of the high-speed permanent magnet synchronous motor is solved, and the running reliability of the high-speed permanent magnet synchronous motor is improved while the temperature rise of a structural member of the high-speed permanent magnet synchronous motor is reduced.

The utility model adopts the technical scheme as follows:

the high-speed permanent magnet synchronous motor comprises a stator base, a stator core and a rotor core, wherein the stator core and the rotor core are arranged in the stator base, the stator core is arranged in the stator base, the rotor core is arranged on the inner wall of the stator core and a gap is reserved between the rotor core and the stator core, a stator winding is arranged on the stator core, the stator winding is wrapped with a main insulator, and a stator main insulating water channel is wrapped outside the main insulator.

Further, the stator winding comprises a stator upper layer winding and a stator lower layer winding, and interlayer insulation is arranged below the stator upper layer winding and above the stator lower layer winding.

Furthermore, a spiral water channel is arranged on the inner wall of the stator base and is arranged between the stator base and the stator core.

Furthermore, an even number of permanent magnets which are uniformly distributed are arranged on the outer wall of the rotor core, a permanent magnet sheath is arranged on the outer wall of each permanent magnet, and the permanent magnet sheath is a high-strength carbon fiber permanent magnet sheath.

Further, the surface of the rotor core is provided with uniformly distributed rotor axial ventilation gaps, and the rotor axial ventilation gaps are in contact with the inner surface of the permanent magnet.

Furthermore, a rotating shaft is arranged in the rotor core and is rotationally connected with the stator base through a bearing arranged on the stator base, the rotor core and the rotating shaft are of an integrated structure and made of magnetic-conductive high-strength carbon steel.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model has simple structure, effectively cools the motor by arranging the main insulating water channel and the spiral water channel, takes away the heat of the motor structural member, solves the problems of poor heat dissipation condition and high temperature rise of the high-speed permanent magnet synchronous motor, and improves the operation reliability of the high-speed permanent magnet synchronous motor while reducing the temperature rise of the high-speed permanent magnet synchronous motor structural member;

2. the high-strength permanent magnet sheath made of carbon fiber is arranged on the outer wall of the permanent magnet, so that the permanent magnet is prevented from being damaged due to huge centrifugal force;

3. the utility model discloses a rotor core and high strength carbon steel construction of pivot as an organic whole magnetic conduction have improved the mechanical strength of motor.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an axial sectional view of a high-speed permanent magnet synchronous motor of the present invention;

fig. 2 is a circumferential cross-sectional view of the high-speed permanent magnet synchronous motor of the present invention;

fig. 3 is a sectional view of the inner circumference of the stator slot of the high-speed permanent magnet synchronous motor of the present invention;

fig. 4 is a circumferential cross-sectional view of the high-speed permanent magnet synchronous motor provided with the rotor axial ventilation gap according to the present invention;

the labels in the figure are: 1-stator base, 2-spiral water channel, 3-stator core, 4-stator winding, 41-stator upper winding, 42-stator lower winding, 5-stator main insulating water channel, 6-rotor core, 7-permanent magnet, 8-permanent magnet sheath, 9-rotating shaft, 10-bearing, 11-main insulation, 12-interlayer insulation and 13-rotor axial ventilation gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

The utility model provides a pair of high-speed PMSM with stator main insulation water course cooling system, including stator frame 1 and stator core 3 and the rotor core 6 of setting in stator frame 1, be provided with stator core 3 in the stator frame 1, rotor core 6 set up stator core 3 inner walls and with stator core 3 between leave the space, be provided with stator winding 4 on the stator core 3, stator winding 4 parcel has main insulation 11, the outer parcel of main insulation 11 has stator main insulation water course 5.

As shown in fig. 1, 2 and 3, the stator winding 4 includes a stator upper winding 41 and a stator lower winding 42, and the interlayer insulation 12 is disposed below the stator upper winding 41 and above the stator lower winding.

The inner wall of the stator base 1 is provided with a spiral water channel 2, the spiral water channel 2 is arranged between the stator base 1 and the stator core 3, and cooling water is introduced into the spiral water channel 2, so that the motor can be effectively cooled.

The permanent magnet synchronous motor is characterized in that an even number of permanent magnets 7 which are uniformly distributed are arranged on the outer wall of the rotor core 6, a permanent magnet sheath 8 is arranged on the outer wall of each permanent magnet 7, and the high-speed permanent magnet synchronous motor is high in rotating speed, so that the permanent magnets 7 cannot bear tensile stress generated by high-speed rotation, and the permanent magnets are protected, namely the high-strength permanent magnet sheath 8 made of carbon fibers is arranged on the outer wall of each permanent magnet 7, and the permanent magnets 7 are prevented from being damaged due to huge centrifugal force.

The rotor core 6 is internally provided with a rotating shaft 9, the rotating shaft 9 is rotatably connected with the stator base 1 through a bearing 10 arranged on the stator base 1, the rotor core 6 and the rotating shaft 9 adopt an integrated structure, the material of the rotor core is magnetic-conductive high-strength carbon steel, and the mechanical strength of the motor is improved.

Example 2

The utility model provides a pair of high-speed PMSM with stator main insulation water course cooling system, including stator frame 1 and stator core 3 and the rotor core 6 of setting in stator frame 1, be provided with stator core 3 in the stator frame 1, rotor core 6 set up stator core 3 inner wall and with stator core 3 between leave the space, be provided with stator winding 4 on the stator core 3, stator winding 4 parcel has main insulation 11, the outer parcel of main insulation 11 has stator main insulation water course 5, stator main insulation water course 5's cooling system can improve motor cooling effect effectively, takes away the heat of motor structure.

As shown in fig. 4, the stator winding 4 includes a stator upper winding 41 and a stator lower winding 42, and the interlayer insulation 12 is provided below the stator upper winding 41 and above the stator lower winding.

The rotor axial ventilation gaps 13 are uniformly distributed on the surface of the rotor core 6, the rotor axial ventilation gaps 13 are in contact with the inner surface of the permanent magnet 7, and the rotor axial ventilation gaps 13 can effectively take away heat of the permanent magnet 7 and the rotor core 6, so that demagnetization resistance of the permanent magnet 7 is improved, eddy current effect of the rotor core 6 can be weakened, and eddy current loss of the rotor core 6 is reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a high-speed PMSM with stator owner insulating water course cooling system which characterized in that: including stator frame (1) and stator core (3) and rotor core (6) of setting in stator frame (1), be provided with stator core (3) in stator frame (1), rotor core (6) set up stator core (3) inner wall and with stator core (3) between leave the space, be provided with stator winding (4) on stator core (3), stator winding (4) parcel has main insulation (11), the outer parcel of main insulation (11) has stator main insulation water course (5).

2. The high speed permanent magnet synchronous machine with stator main insulating water channel cooling system according to claim 1, wherein: the stator winding (4) comprises a stator upper-layer winding (41) and a stator lower-layer winding (42), and interlayer insulation (12) is arranged below the stator upper-layer winding (41) and above the stator lower-layer winding.

3. The high speed permanent magnet synchronous machine with stator main insulating water channel cooling system according to claim 1, wherein: the stator is characterized in that a spiral water channel (2) is arranged on the inner wall of the stator base (1), and the spiral water channel (2) is arranged between the stator base (1) and the stator core (3).

4. The high speed permanent magnet synchronous machine with stator main insulating water channel cooling system according to claim 1, wherein: an even number of permanent magnets (7) which are uniformly distributed are arranged on the outer wall of the rotor core (6), and a permanent magnet sheath (8) is arranged on the outer wall of each permanent magnet (7).

5. The high speed permanent magnet synchronous machine with stator main insulating water channel cooling system according to claim 4, wherein: and rotor axial ventilation gaps (13) which are uniformly distributed are formed in the surface of the rotor core (6), and the rotor axial ventilation gaps (13) are in contact with the inner surface of the permanent magnet (7).

6. The high speed permanent magnet synchronous machine with stator main insulating water channel cooling system according to claim 1, wherein: and a rotating shaft (9) is arranged in the rotor core (6), and the rotating shaft (9) is rotatably connected with the stator base (1) through a bearing (10) arranged on the stator base (1).