CN209805641U - permanent magnet motor and compressor and air conditioner with same - Google Patents

Abstract

The utility model discloses a permanent-magnet machine and have its compressor and air conditioner, permanent-magnet machine include rotor core and stator core, a plurality of permanent magnet grooves have been seted up along its circumference in the rotor core, and a plurality of permanent magnet one-to-ones are installed a plurality ofly the permanent magnet inslot rotor core is last in the radial cross section, at least one end intercommunication in the relative both ends in permanent magnet groove has first magnetism bridge hole that separates. The utility model discloses there is first magnetism bridge opening that separates at the one end or the both ends intercommunication in permanent magnet groove, has promoted PMSM's magnetism isolating capacity, has reduced the magnetic leakage probability, and then has promoted PMSM's work efficiency.

Description

Permanent magnet motor and compressor and air conditioner with same

Technical Field

The utility model relates to the technical field of motors, concretely relates to permanent-magnet machine and have its compressor and air conditioner.

Background

The permanent magnet synchronous motor is a synchronous motor with a rotor using a permanent magnet to replace a winding, has the advantages of high power factor, constant rotating speed, small volume, light weight, high efficiency and the like, and has wide application prospect. However, the existing permanent magnet synchronous motor is easy to have a magnetic flux leakage phenomenon, so that the working efficiency of the motor is affected, and the structure of the permanent magnet motor needs to be further optimized.

SUMMERY OF THE UTILITY MODEL

a first object of the present invention is to provide a permanent magnet motor, which solves the problem of the prior permanent magnet motor that the display is single and dull.

In order to achieve the above object, the present invention provides the following technical solutions: a permanent magnet motor comprises a rotor core and a stator core, wherein a plurality of permanent magnet grooves are formed in the rotor core along the circumferential direction of the rotor core, a plurality of permanent magnets are installed in the permanent magnet grooves in a one-to-one correspondence mode, and at least one of two opposite ends of each permanent magnet groove is communicated with a first magnetic isolation bridge hole.

According to the utility model provides a permanent magnet motor has first magnetism bridge hole that separates at the one end in permanent magnet groove or both ends intercommunication, has promoted PMSM's magnetism isolating capacity, has reduced the magnetic leakage probability, and then has promoted permanent magnet motor's work efficiency.

In addition, according to the utility model discloses a permanent-magnet machine of above-mentioned embodiment can also have following additional technical characterstic:

according to the utility model discloses an example, two adjacent be equipped with second magnetic isolation bridge hole between the permanent magnet groove.

according to an example of the present invention, the second magnetism isolating bridge hole is filled with magnetism isolating fluid.

according to an example of the present invention, the permanent magnet slot is V-shaped; the permanent magnet is in clearance fit with the permanent magnet slot.

According to an example of the present invention, the permanent magnet comprises a first permanent magnet piece and a second permanent magnet piece that are angled to each other, and the first permanent magnet piece and the second permanent magnet piece have a mounting gap therebetween.

According to an example of the present invention, the rotor core includes a first core, a second core, and a baffle; the two second iron cores are respectively arranged at two ends of the first iron core; the two baffles are respectively arranged at the outer sides of the two baffles.

According to an example of the utility model, the mouse cage is also included, the mouse cage comprises a plurality of mouse cage bars and two mouse cage rings positioned at two ends of the mouse cage bars, and the mouse cage rings are respectively connected with the mouse cage bars; the peripheral edge of the first iron core is provided with a plurality of squirrel cage grooves, a plurality of squirrel cage bars are installed in the plurality of squirrel cage grooves in a one-to-one correspondence mode, and the two second iron cores are arranged in the two squirrel cage rings respectively.

According to an example of the utility model, the iron core further comprises a connecting piece, the first iron core, the second iron core and the baffle are all provided with at least one connecting hole, and the connecting piece passes through the connecting hole and connects the first iron core, the second iron core and the baffle into a whole; when a second magnetism isolating bridge hole is arranged between every two adjacent permanent magnet grooves, the aperture of the second magnetism isolating bridge hole close to the connecting hole is smaller than that of the second magnetism isolating bridge hole far away from the connecting hole.

according to an example of the present invention, the stator core is provided with an insulation groove into which insulation paper is inserted.

According to an example of the present invention, the outer wall of the stator core is provided with a plurality of stator flow grooves along the circumferential direction thereof.

a second object of the present invention is to provide a compressor, which has the permanent magnet motor according to the above technical solution.

A third object of the present invention is to provide an air conditioner, which has the compressor according to the above technical solution.

Advantages of the above additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is an exploded view of a permanent magnet motor according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a permanent magnet motor according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram (a) of a first iron core according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram (two) of the first iron core according to the embodiment of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 3;

Fig. 6 is a schematic structural diagram (a) of a second iron core according to an embodiment of the present invention;

Fig. 7 is a schematic structural diagram (ii) of a second iron core according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram (one) of a stator core according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram (two) of the stator core according to the embodiment of the present invention;

Fig. 10 is a schematic structural diagram (one) of a stator according to an embodiment of the present invention;

Fig. 11 is a schematic structural diagram (two) of a stator according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a compressor according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a rotor core; 2. a first iron core; 3. a second iron core; 4. a permanent magnet; 5. a first permanent magnet sheet; 6. a second permanent magnet piece; 7. a permanent magnet slot; 8. a first magnetic isolation bridge hole; 9. a second magnetic isolation bridge hole; 10. A third magnetic isolation bridge hole; 11. a mouse cage; 12. mouse cage bars; 13. a rat cage ring; 14. a squirrel cage groove; 15. connecting holes; 16. a connecting member; 17. a baffle plate; 18. a shaft hole; 19. a stator core; 20. a winding; 21. an insulating groove; 22. insulating paper; 23. a stator circulation groove; 24. a tooth portion; 25. a yoke portion; 26. a body; 27. a motor shaft; 28. assembling a cylinder body on a motor stator; 29. the motor balancing piece.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example one

Referring to fig. 1-11, the present embodiment provides a permanent magnet motor, which includes a rotor and a stator, wherein the rotor includes a rotor core 1, a squirrel cage 11, and permanent magnets 4, and the stator includes a stator core 19 and windings 20, and further description is provided below regarding structural features and improvements of the rotor and the stator of the present embodiment.

As shown in fig. 1-7, the rotor core 1 of this embodiment is composed of three segmented cores, that is, the first core 2 and the two second cores 3 in the figure, the two second cores 3 are respectively located at two ends of the first core 2, and the three are coaxially disposed, the middle portions of the first core 2 and the second core 3 are respectively provided with a shaft hole 18 for the motor shaft 27 to pass through, the first core 2 and the second core 3 of this embodiment are provided with permanent magnet slots 7 (or permanent magnet 4 holes), the permanent magnet slots 7 of the first core 2 and the permanent magnet slots 7 of the second core 3 jointly form a space for accommodating the permanent magnet 4, the two second cores 3 are arranged to gather magnetic energy, and then the magnetic energy is transmitted to the first core 2 along the axial direction, so as to improve the magnetic energy utilization rate of the permanent magnet motor, and further improve the working efficiency of the permanent magnet motor.

The rotor of this embodiment still has two circular shape baffles 17 in two rotor core 1's the outside, baffle 17 and first iron core 2 and the coaxial setting of second iron core 3 to baffle 17 also is equipped with the shaft hole 18 that supplies motor shaft 27 to pass, and the baffle 17 of this embodiment, first iron core 2 and second iron core 3 are equipped with a plurality of connecting holes 15, and connecting piece 16 passes connecting hole 15 and connects the three and be a whole, and is concrete, and connecting piece 16 can be structures such as rivet or screw.

One of the improvements of the permanent magnet motor of this embodiment is that, in the radial direction of the rotor core 1, at least one of the two opposite ends of the permanent magnet slot 7 of the rotor core 1 is communicated with a first magnetic isolation bridge hole 8, and preferably, the two opposite ends of the permanent magnet slot 7 of this embodiment are respectively communicated with two first magnetic isolation bridge holes 8; more preferably, the permanent magnet slot 7 and the first magnetic isolation bridge hole 8 of the present embodiment are integrally formed during machining, so that the first magnetic isolation bridge hole 8 can be regarded as a part of the permanent magnet slot 7. The first magnetic isolation bridge hole 8 of the embodiment improves the magnetic isolation capacity of the permanent magnet synchronous motor, reduces the magnetic leakage probability, and further improves the working efficiency of the permanent magnet motor.

In addition, in order to further improve the magnetic leakage preventing capability of the iron and zinc of the rotor, in this embodiment, a second magnetic isolation bridge hole 9 is further disposed between two adjacent permanent magnet slots 7, a magnetic isolation fluid is filled in the second magnetic isolation bridge hole 9, and the magnetic isolation fluid may be refrigeration oil or other fluid refrigerants, which not only can play a role in magnetic leakage prevention, but also can facilitate heat exchange of the rotor.

Referring to fig. 4-7, in this embodiment, the aperture of the second magnetism isolating bridge hole 9 close to the connecting hole 15 is smaller than the aperture of the second magnetism isolating bridge hole 9 far from the connecting hole 15, that is, the second magnetism isolating bridge hole 9 of this embodiment has two dimensions, a larger second magnetism isolating bridge hole 9 and a smaller second magnetism isolating bridge hole 9 to avoid the connecting hole 15, so as to prevent the two from affecting each other.

In addition to the above improvement, the present embodiment also improves the structures of the permanent magnet 4 and the permanent magnet slot 7, the permanent magnet slot 7 is designed to be V-shaped, the permanent magnet 4 is also V-shaped, and the permanent magnet 4 and the permanent magnet slot 7 are in clearance fit, so that the permanent magnet 4 is conveniently installed. Referring to fig. 1 again, the permanent magnet 4 of the present embodiment includes a first permanent magnet piece 5 and a second permanent magnet piece 6 which form an angle with each other, and a mounting gap is formed between the first permanent magnet piece 5 and the second permanent magnet piece 6. The permanent magnet 4 with the structure can increase the magnetic flux of the permanent magnet 4, and further improves the working efficiency of the motor.

Based on the above structure, in order to realize the self-starting of the permanent magnet motor (self-starting means that the motor is not disconnected when the voltage is reduced, and when the voltage is recovered, the motor is directly accelerated), the rotor of the embodiment further comprises a squirrel cage 11, as can be seen from the attached drawing 1, the squirrel cage 11 of the embodiment comprises a plurality of squirrel cage bars 12 and two squirrel cage rings 13 positioned at two ends of the squirrel cage bars 12, the squirrel cage rings 13 are respectively connected with the plurality of squirrel cage bars 12, the squirrel cage bars 12 are formed by casting through a die-casting aluminum process after the rotor core 1 is laminated, so as to form a squirrel cage 11 structure, and the induction effect after the stator coil is electrified generates the self-starting torque.

The outer peripheral edges of the first iron cores 2 of the embodiment are provided with a plurality of mouse cage grooves 14, a plurality of mouse cage bars 12 are installed in the mouse cage grooves 14 in a one-to-one correspondence mode, the two second iron cores 3 are arranged in the two mouse cage rings 13 respectively, and the two second iron cores 3 are in clearance fit with the two mouse cage rings 13 respectively.

Referring to fig. 3-7, in the radial direction of the rotor core 1, the end surface of the squirrel cage groove 14 is integrally formed by an inner end part, a main body part and an outer end part; interior tip is flat shape, and the main part is the trapezoidal of interior narrow outer width, and outer tip both sides are trapezoidal, and outer tip end is the limit and is constituteed with the endocentric segment circular arc in shaft hole 18, through the improvement to squirrel cage groove 14, makes compressor motor can improve startability and efficiency, and effective filtering 3 harmonics prevents motor rotor axial float, reduces the motor noise. In addition, in order to further improve the magnetic isolation effect, the cage grooves 14 of the present embodiment may further be communicated with third magnetic isolation bridge holes 10 to further increase the magnetic isolation effect.

With reference to fig. 8-11, on the basis of the above-mentioned rotor structure, the present embodiment improves the stator structure, where the stator includes a stator core 19 and a winding 20 installed on the stator core 19, and the stator core matches the size of the yoke 25 through the tooth 24 of the stator core, so that the leakage reactance, the slot filling factor, the tooth magnetic density, and the yoke magnetic density of the motor are within a reasonable range. The stator core 19 is provided with a plurality of insulation grooves 21, insulation paper 22 matched with the insulation grooves 21 is placed in the insulation grooves 21, when the insulation paper 22 is installed, the edge of the insulation paper 22 is inserted into the limiting groove, so that the insulation paper 22 is limited, the insulation paper 22 is limited in the insulation grooves 21 of the stator core 19, the leap of the insulation paper 22 is avoided, the insulation paper 22 is adopted to replace an insulation framework in the prior art, and the number of parts and the mold opening cost are reduced.

furthermore, in this embodiment, a plurality of stator flow grooves 23 are further formed in the outer wall of the stator core 19 along the circumferential direction thereof, so that the yoke portions corresponding to two adjacent flow grooves form an annular magnetic circuit, and magnetic leakage is further reduced.

In addition, this embodiment still improves the processing form of rotor core 1 and stator core 19, and with foretell rotor core 1 and stator core 19 all through the pile-up behind the punching press of electrical steel band (board) shaping, the material chooses for use self-adhesion silicon steel sheet to all rotor punching pieces and stator punching piece are the structure of no knot point, can reduce the iron loss, improve motor efficiency.

example two

Referring to fig. 12, the present embodiment provides a compressor, which includes a machine body 26, a motor stator assembling cylinder 28, a motor balancing block 29, and the permanent magnet motor described in the foregoing embodiments, where the permanent magnet motor is installed in the machine body 26, and a stator of the permanent magnet motor is installed on the stator assembling cylinder, other structures of the permanent magnet motor are already given in the foregoing embodiments, so that no further description is given in the present embodiment, and other structures of the compressor are the same as those in the prior art, and therefore, the description of other components of the compressor is not given in the present embodiment, but a structure and a principle of the compressor can be fully known by those skilled in the art.

EXAMPLE III

The present embodiment provides an air conditioner having a compressor as described in the second embodiment, since the air conditioner of the present embodiment is improved only by the permanent magnet motor structure of the compressor, and the rest of the structure of the air conditioner is the same as the prior art, the present embodiment does not describe the air conditioner in the drawings, nor does it describe other components of the air conditioner, but those skilled in the art can fully understand the structure and principle.

In the description of the present invention, it should be understood that the terms "inside" and "outside" are used for indicating the orientation or the positional relationship based on the orientation or the positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the indicated device must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

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 (12)

1. The utility model provides a permanent magnet motor, includes rotor core (1) and stator core (19), a plurality of permanent magnet grooves (7) have been seted up along its circumference in rotor core (1), and a plurality of permanent magnet (4) one-to-one are installed a plurality ofly in permanent magnet groove (7), its characterized in that on rotor core (1) radial cross-section, at least one end intercommunication in the relative both ends in permanent magnet groove (7) has first magnetic bridge hole (8) that separates.

2. The permanent magnet motor according to claim 1, characterized in that a second magnetic isolation bridge hole (9) is arranged between two adjacent permanent magnet slots (7).

3. The permanent magnet motor according to claim 2, wherein the second magnetic isolation bridge hole (9) is filled with a magnetic isolation fluid.

4. a permanent magnet machine according to claim 1, characterized in that the permanent magnet slots (7) are V-shaped; the permanent magnet (4) is in clearance fit with the permanent magnet groove (7).

5. A permanent magnet electric machine according to claim 4, characterized in that the permanent magnet (4) comprises a first permanent magnet sheet (5) and a second permanent magnet sheet (6) at an angle to each other, with a mounting gap between the first permanent magnet sheet (5) and the second permanent magnet sheet (6).

6. A permanent magnet electrical machine according to any of claims 1-5, characterized in that the rotor core (1) comprises a first core (2) and a second core (3); the two second iron cores (3) are respectively arranged at two ends of the first iron core (2).

7. The permanent magnet motor according to claim 6, further comprising a squirrel cage (11), wherein the squirrel cage (11) comprises a plurality of squirrel cage bars (12) and two squirrel cage rings (13) positioned at two ends of the squirrel cage bars (12), and the squirrel cage rings (13) are respectively connected with the plurality of squirrel cage bars (12); the peripheral edge of the first iron core (2) is provided with a plurality of cage grooves (14), a plurality of cage bars (12) are correspondingly arranged in the cage grooves (14) one by one, and the two second iron cores (3) are respectively arranged in the two cage rings (13).

8. the permanent magnet motor according to claim 6, characterized by further comprising a connecting piece (16), wherein the first iron core (2) and the second iron core (3) are provided with at least one connecting hole (15), and the connecting piece (16) penetrates through the connecting hole (15) and connects the first iron core (2) and the second iron core (3);

When a second magnetism isolating bridge hole (9) is arranged between every two adjacent permanent magnet grooves (7), the aperture of the second magnetism isolating bridge hole (9) close to the connecting hole (15) is smaller than the aperture of the second magnetism isolating bridge hole (9) far away from the connecting hole (15).

9. A permanent magnet machine according to any of claims 1-5, characterized in that the stator core (19) is provided with insulation slots (21), and that insulation paper (22) is inserted in the insulation slots (21).

10. A permanent magnet machine according to any of claims 1-5, characterized in that the outer wall of the stator core (19) is provided with a plurality of stator flow slots (23) along its circumference.

11. A compressor, characterized in that it comprises a permanent magnet motor according to any of claims 1-10.

12. An air conditioner characterized in that it comprises a compressor according to claim 11.