CN209805523U - self-starting synchronous reluctance motor rotor structure, motor and compressor - Google Patents

Abstract

The utility model provides a from starting synchronous reluctance motor rotor structure, motor and compressor. The self-starting synchronous reluctance motor rotor structure comprises a rotor core, wherein a plurality of slit grooves are formed in the rotor core, two ends of each slit groove are respectively provided with a filling groove, a first end of each filling groove is arranged adjacent to the slit groove, a second end of each filling groove extends outwards along the radial direction of the rotor core, and the end part of a second end of each filling groove is provided with at least one bevel edge structure, so that the magnetic flux cannot change suddenly when the d-axis magnetic flux of the rotor core enters a stator along a channel formed by the bevel edge structure. The tip at the second end of each filling groove sets up at least one hypotenuse structure, reduces the cross-sectional area of the tip of the second end of filling the groove promptly, increases the width that forms magnetic conduction passageway between two adjacent filling grooves, has effectively reduced rotor structure magnetic resistance and has taken place the sudden change, has effectively reduced the motor torque pulsation that has this rotor structure, can also reduce the iron loss simultaneously, promotes motor efficiency.

Description

Self-starting synchronous reluctance motor rotor structure, motor and compressor

Technical Field

The utility model relates to the technical field of electric machines, particularly, relate to a self-starting synchronous reluctance motor rotor structure, motor and compressor.

Background

The self-starting synchronous reluctance motor combines the structural characteristics of an induction motor and a reluctance motor, realizes starting by generating torque through cage induction, realizes constant-speed operation by generating reluctance torque through the difference of rotor inductance, and can be directly connected with a power supply to realize starting operation. Compared with an asynchronous starting permanent magnet motor, the self-starting synchronous reluctance motor has the advantages of no rare earth permanent magnet material, no demagnetization problem, low motor cost and good reliability.

In the related art, patent No. CN1255925C provides an inexpensive synchronous induction motor which is easy to start, and a manufacturing apparatus and a manufacturing method for the synchronous induction motor, in which at least a pair of slit portions of magnetic pole protrusions of two poles, in which a d-axis in a direction in which magnetic flux easily flows and a q-axis in a direction in which magnetic flux hardly flows form 90 degrees, and a plurality of slit portions arranged on an outer peripheral side of the slit portions are provided in a rotor, and conductive materials are filled in the slit portions and the slit portions. The slit portions are formed in a linear shape, and the slit portions are radially arranged at equal intervals in the circumferential direction. Since the slots are arranged radially at equal intervals, the magnetic flux between the slots flows radially in a direction perpendicular to the surface of the rotor, and the slots prevent the magnetic flux from flowing in the d-axis direction. In addition, the slit parts are uniformly distributed on the periphery of the rotor, and the slit parts and the stator tooth grooves act to generate large torque pulsation, so that the problem of vibration noise is caused.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a self-starting synchronous reluctance motor rotor structure, motor and compressor to solve the problem of large torque ripple in the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a self-starting synchronous reluctance motor rotor structure, comprising: the rotor core is provided with a plurality of slit grooves, two ends of each slit groove are respectively provided with a filling groove, a first end of each filling groove is arranged adjacent to the slit groove, a second end of each filling groove extends outwards along the radial direction of the rotor core, and the end part of the second end of each filling groove is provided with at least one bevel edge structure, so that the magnetic flux of the d-axis magnetic flux of the rotor core cannot change suddenly when entering the stator along a channel formed by the bevel edge structures.

Further, the tip of the second end in each filling groove is provided with two hypotenuse structures, and two hypotenuse structures include: the first bevel edge structure is arranged on the side wall of one side, far away from the shaft hole of the rotor iron core, of the filling groove, and a first included angle is formed between the extension line of the first bevel edge structure and the d shaft; the second bevel edge structure is arranged on the side wall, close to one side of the shaft hole, of the filling groove, and the extension line of the second bevel edge structure and the d shaft form a second included angle.

Further, the first oblique-side structure and the second oblique-side structure are disposed with a distance in the width direction of the filling groove.

Further, the first included angle is theta 1, wherein theta 1 is larger than or equal to 135 degrees, and/or the second included angle is theta 2, wherein theta 2 is smaller than or equal to 170 degrees.

Further, the angle of the first included angle and/or the second included angle is gradually increased along the direction away from the d-axis.

furthermore, the rotor punching sheet of the rotor core is made of oriented silicon steel sheets, the maximum magnetic conductance direction of the oriented silicon steel sheets is the d-axis direction, and the minimum magnetic conductance direction of the oriented silicon steel sheets is the q-axis direction.

furthermore, an independent filling groove is formed in the position, close to the outer edge of the rotor core, and the q axis of the rotor core is coincided with the geometric center line of the independent filling groove in the radial direction of the rotor core.

Further, the sum of the width of the slit groove positioned on any magnetic pole of the rotor core and passing through the q axis and the width of the independent filling groove on the magnetic pole and passing through the q axis is L3, the distance from the shaft hole of the rotor core to the outer edge of the rotor core is L4, wherein, L4/L3 is more than or equal to 0.2 and less than or equal to 0.5.

Furthermore, the slit groove and the filling grooves correspondingly arranged at the two ends of the slit groove form a magnetic barrier layer, a magnetic conduction channel is formed between the adjacent magnetic barrier layers, and the extending direction of at least one end, close to the outer edge of the rotor core, of the magnetic conduction channel is parallel to the d axis.

Further, the both ends of magnetic conduction passageway all are provided with straight section, and the extending direction of straight section is parallel with the d axle, and the length of straight section sets up along keeping away from d axle direction with reducing gradually.

Further, the width of the magnetic conduction channel is gradually increased from the q axis to two sides.

Further, the middle part of at least one slit groove in the slit grooves is of an arc structure, and two ends of the slit groove are of straight-segment structures.

Further, the distance between the adjacent filling grooves is d1, the minimum width between the adjacent magnetic barrier layers is d, wherein d1 is larger than or equal to d.

furthermore, the included angle between the two ends of the independent filling grooves and the connecting line of the shaft holes of the rotor core is alpha, wherein the alpha is more than or equal to 20 degrees and less than or equal to 60 degrees.

and further, the independent filling groove and the filling groove are filled with the conductive and non-magnetic materials, and the filled conductive and non-magnetic materials are in short circuit through end rings positioned at two ends of the rotor core.

Further, the distance from the side wall of the independent filling slot close to the outer edge of the rotor core is L1, wherein L1 is more than or equal to 0.5 delta, and/or the distance from the filling slot to the slit slot is L2, wherein L2 is more than or equal to 0.5 delta, and delta is the width of an air gap between the stator core and the rotor core.

Furthermore, the cross section of the shaft hole is oval, the long shaft of the shaft hole is located on the d shaft, and the short shaft of the shaft hole is located on the q shaft of the rotor core.

According to the utility model discloses an on the other hand provides a motor, including the self-starting synchronous reluctance motor rotor structure, synchronous reluctance motor rotor knot is foretell self-starting synchronous reluctance motor rotor structure.

according to the utility model discloses an on the other hand provides an electric compressor, including the self-starting synchronous reluctance motor rotor structure, the self-starting synchronous reluctance motor rotor structure is foretell self-starting synchronous reluctance motor rotor structure.

Use the technical scheme of the utility model, the tip at the second end in each packing groove sets up at least one hypotenuse structure, reduces the cross-sectional area of the tip of the second end in packing groove promptly, has increased the width of the magnetic conduction passageway that forms between two adjacent packing grooves, has effectively reduced rotor structure magnetic resistance and has taken place the sudden change to effectively reduced the motor torque pulsation that has this rotor structure, can also reduce the iron loss simultaneously, promote motor efficiency.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

Fig. 1 shows a schematic structural view of a first embodiment of a rotor structure of a self-starting synchronous reluctance machine according to the present invention;

Fig. 2 shows a schematic structural view of a second embodiment of a self-starting synchronous reluctance machine rotor structure according to the present invention;

Fig. 3 shows a schematic structural view of a third embodiment of a rotor structure of a self-starting synchronous reluctance machine according to the present invention;

Fig. 4 shows a torque comparison diagram of a self-starting synchronous reluctance machine rotor structure according to the present invention with the prior art.

Wherein the figures include the following reference numerals:

10. A rotor core; 11. a first hypotenuse structure; 12. a shaft hole; 13. a second beveled edge structure;

20. A slit groove;

30. Filling the groove;

40. Independently filling the grooves;

50. A straight section;

60. And an end ring.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1 to 3, according to an embodiment of the present invention, a rotor structure of a self-starting synchronous reluctance motor is provided.

Specifically, as shown in fig. 1, the rotor structure includes a rotor core 10. The rotor core 10 is provided with a plurality of slit grooves 20, and one filling groove 30 is provided at each end of each slit groove 20. The first ends of the filling slots 30 are disposed adjacent to the slit slots 20, the second ends of the filling slots 30 are disposed to extend outward in a radial direction of the rotor core 10, and the end of the second end of each filling slot 30 is provided with at least one bevel structure, so that the magnetic flux does not change abruptly when the d-axis magnetic flux of the rotor core 10 enters the stator along a channel formed at the bevel structure

In this embodiment, set up at least one hypotenuse structure at the tip of the second end of each filling groove, reduce the cross-sectional area of the tip of the second end of filling groove promptly, increased the width of the magnetic conduction passageway that forms between two adjacent filling grooves, effectively reduced rotor structure magnetic resistance and taken place the sudden change to effectively reduced the motor torque pulsation that has this rotor structure, can also reduce the iron loss simultaneously, promoted motor efficiency.

As shown in fig. 1, the end of the second end of each filling groove 30 is provided with two bevel edge structures, which include: the first bevel edge structure 11 is arranged on the side wall of the filling groove 30, which is far away from the shaft hole 12 of the rotor core 10, and the extension line of the first bevel edge structure 11 and the d-axis form a first included angle; and the second bevel edge structure 13 is arranged on the side wall of the filling groove 30 close to one side of the shaft hole 12, and the extension line of the second bevel edge structure 13 and the d-axis form a second included angle. Wherein the first hypotenuse structure 11 and the second hypotenuse structure 13 are arranged with a distance in the width direction of the filling trench 30. The first included angle is theta 1, wherein theta 1 is more than or equal to 135 degrees, and/or the second included angle is theta 2, wherein theta 2 is more than or equal to 170 degrees. The magnetic field entering the stator can be gradually reduced, torque pulsation is reduced, magnetic flux entering the stator can be increased, and motor torque is improved.

In order to further improve the performance of the rotor structure and enable the motor with the rotor structure to have better efficiency, the angles of the first included angle and the second included angle can be set to be gradually increased along the direction away from the d axis. The rotor sheet of the rotor core 10 is made of oriented silicon steel sheets, the maximum magnetic conductance direction of the oriented silicon steel sheets is the d-axis direction, and the minimum magnetic conductance direction of the oriented silicon steel sheets is the q-axis direction. An independent filling groove 40 is formed at the position close to the outer edge of the rotor core 10, and the q axis of the rotor core 10 is coincided with the geometric center line of the independent filling groove 40 along the radial direction of the rotor core 10.

Further, the sum of the width of the slot 20 located on any one magnetic pole of the rotor core 10 and passing through the q-axis and the width of the independent filling slot 40 on the magnetic pole passing through the q-axis is L3, and the distance from the shaft hole 12 of the rotor core 10 to the outer edge of the rotor core 10 is L4, wherein, L4/L3 is more than or equal to 0.2 and less than or equal to 0.5. The slit grooves 20 and the filling grooves 30 provided at both ends thereof form a magnetic barrier layer, a magnetic conduction channel is formed between adjacent magnetic barrier layers, and the extending direction of at least one end of the magnetic conduction channel near the outer edge of the rotor core 10 is parallel to the d-axis. The arrangement enables the d-axis magnetic flux to smoothly circulate on the d axis, the inductance difference is increased, and the reluctance torque is improved. As shown in fig. 1, both ends of the magnetic conduction channel are parallel to the d-axis.

As shown in fig. 1, the two ends of the magnetic conduction channel are both provided with straight sections 50, the extending direction of the straight sections 50 is parallel to the d axis, and the length of the straight sections 50 is gradually reduced along the direction away from the d axis. The width of the magnetic conduction channel is gradually increased from the q axis to two sides.

Further, the middle part of at least one slit groove 20 of the plurality of slit grooves is in an arc structure, and both ends of the slit groove 20 in the arc structure are in a straight structure. The distance between adjacent filling grooves 30 is d1, the minimum width between adjacent magnetic barrier layers is d, wherein d1 is more than or equal to d. As shown in fig. 1, the angle between the two ends of the independent filling slot 40 and the connecting line of the shaft hole 12 of the rotor core 10 is α, wherein α is greater than or equal to 20 ° and less than or equal to 60 °. The independent filling grooves 40 and the filling grooves 30 are filled with an electrically and magnetically nonconductive material, and the filled electrically and magnetically nonconductive material is short-circuited by end rings 60 located at both ends of the rotor core 10. The distance from the side wall of the independent filling slot 40 close to the outer edge of the rotor core 10 is L1, wherein, 0.5 delta is more than or equal to L1 and less than delta, the distance from the filling slot 30 to the slit slot 20 is L2, wherein, 0.5 delta is more than or equal to L2 and less than delta, and delta is the width of the air gap between the stator core and the rotor core 10. The cross section of the shaft hole 12 is elliptical, the major axis of the shaft hole 12 is located on the d axis, and the minor axis of the shaft hole 12 is located on the q axis of the rotor core 10. Of course, as shown in FIG. 2, the cross-section of the axial bore 12 is circular.

the rotor structure in above-mentioned embodiment can also be used for electrical equipment technical field, promptly according to the utility model discloses an on the other hand provides a motor, including self-starting synchronous reluctance motor rotor structure, self-starting synchronous reluctance motor rotor structure is self-starting synchronous reluctance motor rotor structure in above-mentioned embodiment.

The rotor structure in above-mentioned embodiment can also be used for compressor equipment technical field, promptly according to the utility model discloses an on the other hand provides a compressor, including self-starting synchronous reluctance motor rotor structure, self-starting synchronous reluctance motor rotor structure is self-starting synchronous reluctance motor rotor structure in above-mentioned embodiment. Of course, the rotor structure can also be used in the technical field of fans and air compressor equipment.

Specifically, adopt the synchronous dynamic reluctance motor rotor structure of this application, solved asynchronous machine inefficiency, the problem of rotational speed along with load change, adopt this rotor structure with low costs, the reliability is high, can realize high-efficient constant rotational speed operation. Filling the outer tip of groove and carrying out the corner cut design and set to the hypotenuse structure promptly, effectively reducing the magnetic resistance sudden change, reducing motor torque pulsation, can also reduce the iron loss simultaneously, promote motor efficiency. The method reduces the obstruction of a filling groove (a narrow groove part) to the magnetic flux of the d axis of the rotor in the prior art, simultaneously adopts the oriented silicon steel material, ensures that the magnetic conduction direction of the d axis of the rotor is consistent with the maximum magnetic conduction direction of the oriented silicon steel material, increases the difference of the magnetic fluxes of the d axis and the q axis, and improves the output power and the efficiency of the motor.

Carry out the corner cut design through filling the outer tip of groove, effectively reduce the magnetic resistance sudden change, reduce motor torque pulsation, can also reduce the iron loss simultaneously, promote motor efficiency. So set up for the rotor is at the rotation in-process, and the magnetic flux can pass through the hypotenuse department and pass through gradually and get into the stator, slows down the magnetic flux sudden change, reduces the torque pulsation, and effectual d axle magnetic flux entering stator production torque has been guaranteed to the incision in addition, can not increase the magnetic leakage moreover. The rotor adopts the orientation silicon steel sheet, and silicon steel sheet magnetic conductance maximum direction is rotor d axle direction, and silicon steel sheet magnetic conductance minimum direction is rotor q axle direction, utilizes the material characteristic to make the inductance difference of motor bigger, increases the reluctance torque of motor, adopts oval shaft hole simultaneously, reduces the magnetic barrier radian, makes the passageway between the magnetic barrier more tend to the straight line, and orientation silicon steel sheet utilizes the best.

The rotor structure is formed by axially laminating rotor punching sheets with specific structures, a filling groove and a slit groove are formed in each rotor punching sheet, a shaft hole 12 matched with a rotating shaft is formed, the filling groove and the slit groove jointly form a multilayer magnetic barrier structure of a rotor, a space between adjacent magnetic barrier layers is a magnetic flux circulation channel of the rotor, two edges of the outer end of the filling groove are subjected to corner cutting, included angles between two cut edges of the filling groove and a horizontal edge parallel to a d axis are theta 1 and theta 2 respectively, the angles theta 1 and theta 2 are gradually increased along with the fact that the filling groove is far away from the d axis, namely the filling groove is far away from the d axis, and the included angle between two cut edges of the outer end of the filling groove and the horizontal edge parallel to the d axis is large. The angles theta 1 and theta 2 both meet the condition that theta 1 is more than or equal to 135 degrees or theta 2 is less than or equal to 170 degrees. More preferably, theta 1 is equal to or less than 145 degrees or theta 2 is equal to or less than 165 degrees. Set up like this and make the rotor at the rotation in-process, the magnetic flux can pass through the notch and pass through gradually and get into the stator, slows down the magnetic flux sudden change, reduces the torque pulsation, and effectual d axle magnetic flux entering stator production torque has been guaranteed to the notch in addition, can not increase the magnetic leakage moreover.

The rotor punching sheet adopts the oriented silicon steel sheet, wherein the silicon steel sheet magnetic conductance maximum direction is rotor d axle direction, and the silicon steel sheet magnetic conductance minimum direction is rotor q axle direction, and its purpose utilizes the material characteristic to make the inductance difference of motor bigger, increases the reluctance torque of motor, reduces motor rotor iron loss, promotes motor efficiency. The ratio of the width of the rotor magnetic barrier part consisting of the filling groove and the slit groove in the q-axis direction to the distance from the outer circle of the rotor to the shaft hole can be 0.2-0.5. More preferably, the ratio may be between 0.3 and 0.4. The purpose is to select reasonable magnetic barrier to account for than, has both guaranteed sufficient magnetic barrier width, effectively hinders q axle magnetic flow, guarantees reasonable magnetic flow channel again, prevents that the magnetic flow from appearing the magnetic flow supersaturation, increases d axle magnetic flow, makes the salient pole ratio of motor bigger, increases the reluctance torque of motor for the output torque of motor is optimum.

And the rotor magnetic conduction channel between the rotor magnetic barrier layers consisting of the filling groove and the slit groove is parallel to the maximum magnetic conduction direction of the silicon steel sheet at the part close to the outer edge of the rotor. The closer the rotor magnetic conduction channel between the rotor magnetic barrier layers is to the d axis, the longer the magnetic conduction channel length parallel to the maximum magnetic conduction direction of the silicon steel sheet is, and the purpose is to ensure that the d axis magnetic flux can flow without obstruction.

The width of a magnetic channel between rotor magnetic barrier layers formed by the filling grooves and the slit grooves is the narrowest at the position of the q axis, and the width of the magnetic channel from the q axis to the two sides of the excircle of the rotor gradually transits to the maximum. The magnetic flux path of the d axis is optimized, the magnetic flux in the d axis direction is increased, the difference value between the magnetic fluxes of the d axis and the q axis is increased, larger reluctance torque is generated, and the output torque and the efficiency of the motor are increased. The slot groove is composed of a straight line part close to the outer circle of the rotor and a corresponding arc line part, the radian of the arc line part of the slot groove close to the shaft hole is larger, the slot groove is transited from the shaft hole position to the outer circle of the rotor, and the radian of the arc line part is gradually reduced and even becomes a straight line. Under the position of considering the rotor shaft hole, the design reasonably utilizes the space of the rotor in the directions of the d shaft and the q shaft, so that the magnetic flux circulation channel of the d shaft is as smooth as possible, meanwhile, the magnetic flux circulation channel of the q shaft is blocked, the optimized rotor space is utilized to improve the inductance difference of the d shaft and the q shaft of the rotor, and the performance of the motor is better.

furthermore, the relation between the width d1 between adjacent filling grooves and the minimum width d between corresponding magnetic barrier layers is required to satisfy that d1 is more than or equal to d, so that the phenomenon that the magnetic channel in the d-axis direction is not oversaturated can be ensured, and the phenomenon that the flow of the d-axis magnetic flux is obstructed due to the oversaturation is avoided. The periphery of the rotor is also provided with independent filling grooves which are positioned on the q-axis direction of the rotor and symmetrically distributed on two sides of the d-axis, the included angle between the connecting lines of two ends of the independent filling grooves positioned on the q-axis direction and the circle center is alpha, the angle range of the included angle is more than or equal to 20 degrees and less than or equal to 60 degrees, and more preferably, the angle is more than or equal to 40 degrees and less than or equal to 50 degrees. The design can increase the number of magnetic barrier layers of the rotor and increase salient pole difference on one hand, and can improve the starting performance of the motor on the other hand.

The filling grooves and the independent filling grooves are filled with conductive and non-conductive materials, and self-short circuit is realized through end rings 60 at two ends of the rotor to form a squirrel cage structure, so that the self-starting function is realized.

The distance from the filling groove and the independent filling groove to the outer surface of the rotor core is L1, the distance from the filling groove 2 to the slit groove is L2, L1 and L2 respectively satisfy that L1 is larger than or equal to 0.5 delta and L2 is larger than or equal to 0.5 delta, wherein delta is the width of an air gap between the stator core and the rotor core. The design can reduce the magnetic flux leakage of the rotor part of the motor and improve the performance of the motor under the condition of ensuring the mechanical strength of the rotor;

The shape of the shaft hole is not limited to the circular hole shape, and more preferably, the shaft hole 5 is designed to be elliptical or elliptical-like, the major axis of the elliptical or elliptical-like shaft hole being in the d-axis direction of the rotor and the minor axis thereof being in the q-axis direction of the rotor. Due to the design of the oval shaft hole, the radian of the magnetic barriers is reduced in order to match the characteristics of the oriented silicon steel material, so that the channels between the magnetic barriers tend to be linear, and the oriented silicon steel sheet is optimally utilized.

As shown in fig. 4, a torque comparison diagram of the rotor structure of the present application and the prior art shows that the rotor structure of the present application can effectively improve the output torque of the motor, so that the performance of the motor is better, and meanwhile, the torque ripple of the motor is reduced, and the iron loss is reduced.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (19)

1. A self-starting synchronous reluctance machine rotor structure, comprising:

The magnetic flux generator comprises a rotor core (10), wherein a plurality of slit grooves (20) are formed in the rotor core (10), two ends of each slit groove (20) are respectively provided with a filling groove (30), a first end of each filling groove (30) is arranged adjacent to each slit groove (20), a second end of each filling groove (30) extends outwards along the radial direction of the rotor core (10), and the end of the second end of each filling groove (30) is provided with at least one bevel edge structure, so that the d-axis magnetic flux of the rotor core (10) cannot change suddenly when entering a stator along a channel formed by the bevel edge structures.

2. self-starting synchronous reluctance machine rotor structure according to claim 1, wherein the end of the second end of each filling slot (30) is provided with two bevelled structures comprising:

The first bevel edge structure (11) is arranged on the side wall of one side, away from the shaft hole (12) of the rotor core (10), of the filling groove (30), and a first included angle is formed between the extension line of the first bevel edge structure (11) and the d axis;

Second hypotenuse structure (13), second hypotenuse structure (13) set up in being close to of filling groove (30) on the lateral wall of shaft hole (12) one side, the extension line of second hypotenuse structure (13) with the d axle has the second contained angle.

3. self-starting synchronous reluctance machine rotor structure according to claim 2, wherein said first bevelled structure (11) is placed at a distance from said second bevelled structure (13) in the width direction of said filling slot (30).

4. A rotor structure of a self-starting synchronous reluctance machine according to claim 2 or 3, wherein said first angle is θ 1, wherein 135 ° ≦ θ 1, and/or said second angle is θ 2, wherein θ 2 ≦ 170 °.

5. The rotor structure of a self-starting synchronous reluctance machine according to claim 4, wherein the angle of the first angle and/or the second angle is gradually increased in a direction away from the d-axis.

6. the rotor structure of the self-starting synchronous reluctance motor according to claim 1, wherein the rotor sheets of the rotor core (10) are made of oriented silicon steel sheets, the maximum magnetic conductance direction of the oriented silicon steel sheets is the d-axis direction, and the minimum magnetic conductance direction of the oriented silicon steel sheets is the q-axis direction.

7. The rotor structure of the self-starting synchronous reluctance motor according to claim 1, wherein an independent filling slot (40) is opened near the outer edge of the rotor core (10), and the q-axis of the rotor core (10) coincides with the geometric center line of the independent filling slot (40) along the radial direction of the rotor core (10).

8. The rotor structure of self-starting synchronous reluctance machine according to claim 7, wherein the sum of the width of said slit groove (20) on any one of the poles of said rotor core (10) passing through said q-axis and the width of said separate filling groove (40) on the pole passing through said q-axis is L3, and the distance from the shaft hole (12) of said rotor core (10) to the outer edge of said rotor core (10) is L4, wherein 0.2 ≦ L4/L3 ≦ 0.5.

9. The rotor structure of self-starting synchronous reluctance machine according to claim 1, wherein said slit grooves (20) and said filling grooves (30) corresponding to both ends thereof form a magnetic barrier layer, and a magnetic conduction channel is formed between adjacent magnetic barrier layers, and the extension direction of at least one end of said magnetic conduction channel near the outer edge of said rotor core (10) is parallel to the d-axis.

10. the rotor structure of the self-starting synchronous reluctance motor of claim 9, wherein both ends of the magnetic conduction channel are provided with straight sections (50), the extending direction of the straight sections (50) is parallel to the d axis, and the length of the straight sections (50) is gradually reduced along the direction away from the d axis.

11. The rotor structure of a self-starting synchronous reluctance motor according to claim 9, wherein the width of the magnetic conductive path is gradually increased from the q axis to both sides.

12. The rotor structure of a self-starting synchronous reluctance motor according to claim 1, wherein at least one of said slit grooves (20) among a plurality of said slit grooves (20) has an arc-shaped configuration at a central portion thereof, and both ends of said slit groove (20) have a straight-segment configuration.

13. Self-starting synchronous reluctance machine rotor structure according to claim 9, wherein the distance between adjacent filling slots (30) is d1 and the minimum width between adjacent barrier layers is d, wherein d1 ≧ d.

14. The rotor structure of the self-starting synchronous reluctance motor according to claim 7, wherein the angle between the two ends of the independent filling slot (40) and the connecting line of the shaft hole (12) of the rotor core (10) is α, wherein α is greater than or equal to 20 ° and less than or equal to 60 °.

15. Self-starting synchronous reluctance machine rotor structure according to claim 7, wherein said separate filling slots (40) and said filling slots (30) are filled with an electrically non-conductive material, said filled electrically non-conductive material being shorted by end rings located at both ends of said rotor core (10).

16. The rotor structure of self-starting synchronous reluctance machine according to claim 7, wherein the distance from the side wall of said independent filling slot (40) close to the side of the outer edge of said rotor core (10) to the outer edge of said rotor core (10) is L1, wherein 0.5 δ ≦ L1 < δ, and/or the distance from said filling slot (30) to said slot (20) is L2, wherein 0.5 δ ≦ L2 < δ, δ being the width of the air gap between the stator core and said rotor core (10).

17. The rotor structure of the self-starting synchronous reluctance motor according to claim 2, wherein the cross-section of the shaft hole (12) is elliptical, the major axis of the shaft hole (12) is located on the d-axis, and the minor axis of the shaft hole (12) is located on the q-axis of the rotor core (10).

18. An electrical machine comprising a self-starting synchronous reluctance machine rotor structure, characterized in that the self-starting synchronous reluctance machine rotor structure is as claimed in any one of claims 1 to 17.

19. A compressor comprising a self-starting synchronous reluctance motor rotor structure, characterized in that the self-starting synchronous reluctance motor rotor structure is the self-starting synchronous reluctance motor rotor structure of any one of claims 1 to 17.