CN216290383U - Motor rotor and self-starting synchronous reluctance motor - Google Patents

Abstract

The application provides a motor rotor and a self-starting synchronous reluctance motor. This electric motor rotor includes rotor core (1), packing groove and slot groove (2) are all seted up on rotor core (1), the packing groove is including non-independent packing groove (3), a non-independent packing groove (3) correspond a slot groove (2) setting, non-independent packing groove (3) set up in one side of the central axis of keeping away from or being close to rotor core (1) in slot groove (2) that correspond, and communicate with slot groove (2) that correspond. According to the motor rotor provided by the application, the area of the filling groove can be increased, the resistance of the filling groove is reduced, the pulling-in torque of the motor is increased, and the motor pulling-in synchronization capacity is improved.

Description

Motor rotor and self-starting synchronous reluctance motor

Technical Field

The application relates to the technical field of motors, in particular to a motor rotor and a self-starting synchronous reluctance motor.

Background

The self-starting synchronous reluctance motor combines the advantages of an asynchronous motor on the basis of the synchronous reluctance motor, realizes self-starting through asynchronous torque generated by a rotor conducting bar, and does not need to be driven by a frequency converter. Compared with an asynchronous motor, the motor can realize constant-speed operation, the loss of a rotor is low, and the efficiency in synchronous operation is improved; compared with an asynchronous starting permanent magnet synchronous motor, the motor does not use permanent magnet materials, is low in cost and does not have the problem of demagnetization of permanent magnets.

However, the self-starting synchronous reluctance motor in the related art has the advantages of small rotor filling groove area, small traction torque and poor traction synchronization capability while ensuring the starting capability.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the application is to provide a motor rotor and a self-starting synchronous reluctance motor, which can increase the area of a filling groove, reduce the resistance of the filling groove, increase the pull-in torque of the motor and improve the pull-in synchronization capability of the motor.

In order to solve the above problem, the present application provides a motor rotor, including rotor core, filling groove and slot are all seted up on rotor core, and the filling groove includes non-independent filling groove, and a non-independent filling groove corresponds a slot setting, and non-independent filling groove sets up in the slot that corresponds one side of keeping away from or being close to rotor core's the central axis to with the slot intercommunication that corresponds.

Preferably, the mutually communicated non-independent filling grooves and the slit grooves form a magnetic barrier layer, the number of the slit grooves is at least two, the number of the non-independent filling grooves is at least two, and the at least two slit grooves and the at least two non-independent filling grooves are arranged along the q-axis direction of the motor rotor to form a plurality of magnetic barrier layers.

Preferably, in a cross-section perpendicular to the central axis of the rotor core, the total area of the slit grooves is 40% to 80% of the total area of the slit grooves and the filling grooves.

Preferably, the total area of the slit groove is 50% to 70% of the total area of the slit groove and the filling groove.

Preferably, the total area of the slit groove is 55% to 65% of the total area of the slit groove and the filling groove.

Preferably, the dependent filling grooves and the slit grooves extend from both sides of the q-axis to the outer circumference of the rotor core along the d-axis direction, and there is no barrier between the dependent filling grooves and the slit grooves.

Preferably, the non-independent filling grooves and the slit grooves which are communicated with each other form a magnetic barrier layer, the magnetic barrier layer is provided with a dividing rib, and the dividing rib divides the magnetic barrier layer into at least two sections along the d-axis direction.

Preferably, the magnetic barrier layers are at least two layers, on the cross section perpendicular to the central axis of the rotor core, the width of the dividing rib of the outermost magnetic barrier layer close to the excircle of the rotor is L1, the width of the dividing rib of the innermost magnetic barrier layer close to the shaft hole is L2, L1 is more than or equal to L2, L1 is more than or equal to 0.5 delta, and delta is the width of an air gap between the stator and the rotor.

Preferably, the interval between the innermost magnetic barrier layer close to the shaft hole and the outer circle of the rotor is L3, the interval between the outermost magnetic barrier layer close to the outer circle of the rotor and the outer circle of the rotor is L4, L4 is not less than L3, L4 is not less than 0 and not more than 2.5 delta, and delta is the width of an air gap between the stator and the rotor.

Preferably, the mutually communicated non-independent filling grooves and the slit grooves form a magnetic barrier layer, and the magnetic barrier layer comprises arc line segments and/or straight line segments.

Preferably, when the magnetic barrier layer comprises an arc segment, the radian of the arc segment is gradually increased along the direction from the rotor shaft hole to the outer circle of the rotor, and the radian of the outer arc of the magnetic barrier layer on the same layer is larger than that of the inner arc.

Preferably, when the barrier layer includes an arc segment, the width of the arc segment increases in a direction outward from the q-axis along the d-axis.

Preferably, when the barrier layer further comprises straight line segments, the straight line segments are located on both sides of the arc segments.

Preferably, when the barrier layer includes arc segments, the width of the magnetic conductive path between adjacent arc segments increases from the q-axis in a direction outward from the d-axis.

Preferably, the ratio of the sum sigma m1 of the widths of the magnetic barrier layers to the width m2 from the shaft hole to the outer circle of the rotor core is 0.4-0.6.

Preferably, the minimum width of the magnetic conduction channel between two adjacent magnetic barrier layers along the q-axis direction is h1, the minimum width of the magnetic barrier layer with the smaller width in the two adjacent magnetic barrier layers along the q-axis direction is h2, and h1 is more than or equal to 0.7h 2.

Preferably, the filling grooves further include independent filling grooves which are located outside the non-independent filling grooves along the q-axis direction and individually form the magnetic barrier layer.

Preferably, on a cross section perpendicular to the central axis of the rotor core, an included angle α 1 formed by a connecting line of both ends of the independent filling slot and the central axis of the rotor core satisfies 20 ° ≦ α 1 ≦ 60 °.

Preferably, 30 DEG-alpha 1-50 deg.

Preferably, the rotor core includes a shaft hole having a maximum width in the q-axis direction smaller than or equal to a maximum width in the d-axis direction of the shaft hole.

Preferably, the axial bore is comprised of arc segments and/or straight segments.

Preferably, the at least partially filled trench is filled with an electrically and magnetically non-conductive material.

According to another aspect of the present application, there is provided a self-starting synchronous reluctance motor comprising a motor rotor as described above.

The application provides a motor rotor, including rotor core, packing groove and slot groove are all seted up on rotor core, and the packing groove includes the non-independent packing groove, and a non-independent packing groove corresponds a slot groove setting, and the non-independent packing groove setting is kept away from or is close to one side of rotor core's the central axis in the slot groove that corresponds to with the slot groove intercommunication that corresponds. The non-independent filling groove of the motor rotor is communicated with the slit groove to form a magnetic barrier layer, and the non-independent filling groove is positioned on one side of the slit groove, which is far away from or close to the central axis of the rotor core, so that the length of the non-independent filling groove along the direction of the d axis can be greatly increased, the area of the filling groove is increased, the resistance of the filling groove is reduced, the smaller resistance of the filling groove is beneficial to increasing the pulling-in torque of the motor, and the capability of the motor for pulling in synchronization is improved; in addition, the magnetic barrier layer of rotor is constituteed along the communication of q axle direction in slot groove and the dependent filling groove, can increase the width of rotor magnetic barrier layer along the q axle direction, and increase motor salient pole is poor, promotes motor efficiency.

Drawings

FIG. 1 is a schematic structural diagram of a rotor of an electric machine according to an embodiment of the present application;

FIG. 2 is a graph comparing motor efficiency of a motor of one embodiment of the present application with a motor of the related art;

FIG. 3 is a graph comparing current, loss, temperature rise at rated point for a motor according to one embodiment of the present application and a motor of the related art;

fig. 4 is a comparison graph of the rotation speed of the motor of one embodiment of the present application and the rotation speed of the motor of the related art during the starting process.

The reference numerals are represented as:

1. a rotor core; 2. a slit groove; 3. filling the grooves non-independently; 4. independently filling the grooves; 5. cutting ribs; 6. a shaft hole; 7. and a magnetic conduction channel.

Detailed Description

Referring to fig. 1 to 4 in combination, according to an embodiment of the present application, a rotor of an electric motor includes a rotor core 1, filling slots and slit slots 2, the filling slots and the slit slots 2 are both opened on the rotor core 1, the filling slots include non-independent filling slots 3, one of the non-independent filling slots 3 is disposed corresponding to one of the slit slots 2, and the non-independent filling slot 3 is disposed on a side of the corresponding slit slot 2 away from or close to a central axis of the rotor core 1 and communicates with the corresponding slit slot 2.

The non-independent filling groove 3 of the motor rotor is communicated with the narrow slot 2 to form a magnetic barrier layer, the non-independent filling groove 3 is positioned on one side, far away from or close to the central axis of the rotor core 1, of the narrow slot 2, the length of the non-independent filling groove 3 in the direction of the d axis can be greatly increased, the area of the filling groove is increased, the resistance of the filling groove is reduced, the smaller resistance of the filling groove is beneficial to increasing the pulling-in torque of the motor, and the capability of the motor for pulling in synchronization is improved; in addition, the slit groove 2 and the dependent filling groove 3 are communicated along the q-axis direction to form a magnetic barrier layer of the rotor, so that the width of the magnetic barrier layer of the rotor along the q-axis direction can be increased, the salient pole difference of the motor is increased, and the motor efficiency is improved.

In one embodiment, the mutually communicated non-independent filling grooves 3 and the slit grooves 2 form a magnetic barrier layer, the number of the slit grooves 2 is at least two, the number of the non-independent filling grooves 3 is at least two, and the at least two slit grooves 2 and the at least two non-independent filling grooves 3 are arranged along the q-axis direction of the motor rotor to form a multilayer magnetic barrier layer. In this embodiment, because a magnetic barrier layer is formed by the non-independent filling groove 3 and the slit groove 2 along the q-axis direction, the width of the magnetic barrier layer along the q-axis direction can be increased while the length of the non-independent filling groove 3 along the d-axis direction is increased, the width of the rotor magnetic barrier layer along the q-axis direction can be further increased by the multilayer magnetic barrier layer, the salient pole difference of the motor is increased, and the motor efficiency is improved.

In addition, because the setting position of non-independent filling groove 3 has been optimized, and not set up the both sides along the d axle direction at slot 2, but set up the outside or the inboard along the q axle direction at slot 2, consequently make slot 2 can outwards extend to the position that is close to the rotor excircle along the d axle direction, make slot 2 all have the distribution in the d axle direction of following, thereby can improve slot 2's flow area, improve rotor core 1's radiating efficiency, be favorable to rotor core 1's even heat dissipation more.

In one embodiment, the total area of the slit grooves 2 is 40% to 80% of the total area of the slit grooves 2 and the filled grooves in a cross section perpendicular to the central axis of the rotor core 1.

Preferably, the total area of the slit groove 2 is 50% to 70% of the total area of the slit groove 2 and the filling groove.

Further preferably, the total area of the slit groove 2 is 55% to 65% of the total area of the slit groove 2 and the filling groove.

By limiting the proportion of the total area of the slit grooves 2 to the total area of the magnetic barrier layer, the flow area of the air circulation passage on the rotor core 1 can be ensured, which is helpful for improving the heat dissipation of the rotor.

In one embodiment, the dependent filling grooves 3 and the slit grooves 2 each extend from both sides of the q-axis in the d-axis direction toward the outer circumference of the rotor core 1, and there is no barrier between the dependent filling grooves 3 and the slit grooves 2. In this embodiment, before the non-filled electrically and magnetically permeable material, the slot 3 and the slit slot 2 are filled separately to form a complete magnetic barrier slot, the magnetic barrier groove is completely hollow without a partition structure, the non-independent filling groove 3 and the slit groove 2 are distinguished by filling the non-independent filling groove 3 with the conductive non-magnetic material, the side surface of the conductive non-magnetic material facing one side of the slit groove 2 forms an interface between the non-independent filling groove 3 and the slit groove 2, when the electrically non-conductive and magnetically non-conductive material is removed, the non-separate filling groove 3 and the slit groove 2 are completely communicated in the length direction from the first end to the second end, therefore, the magnetic barrier groove formed by the non-independent filling groove 3 and the slit groove 2 can be directly processed without other treatment, the slot 3 and the slit slot 2 are then divided by filling with an electrically and magnetically non-conductive material.

In one embodiment, the non-independent filling grooves 3 and the slit grooves 2 which are communicated with each other form a magnetic barrier layer, the magnetic barrier layer is provided with the dividing ribs 5, and the dividing ribs 5 divide the magnetic barrier layer into at least two sections along the d-axis direction. In the present embodiment, since the non-independent filling grooves 3 and the slit grooves 2 both extend from the q axis to the outer circle of the rotor along the d axis direction, the mechanical strength of the rotor core 1 is reduced, and by providing the dividing ribs 5, the magnetic barrier layers can be segmented, the length of the magnetic barrier layers can be reduced, and the connection between the adjacent magnetic conduction channels 7 can be realized, thereby effectively enhancing the mechanical strength of the rotor core 1.

In one embodiment, the magnetic barrier layers are at least two layers, on the cross section perpendicular to the central axis of the rotor core 1, the width of the segmentation rib 5 of the outermost magnetic barrier layer close to the excircle of the rotor is L1, the width of the segmentation rib 5 of the innermost magnetic barrier layer close to the shaft hole 6 is L2, L1 is more than or equal to L2, L1 is more than or equal to 0.5 delta, and delta is the width of an air gap between the stator and the rotor. In this embodiment, can utilize the air gap width between the stator and the rotor to prescribe a limit to the minimum width of cutting apart the muscle to can reduce the processing degree of difficulty, improve rotor core 1's mechanical strength, in addition, through the relation between the width of injecing rotor core 1's inlayer and outermost segmentation muscle 5, can effectively reduce the magnetic leakage on inlayer magnetic barrier layer, promote motor efficiency.

In one embodiment, the dividing rib 5 extends along the q-axis direction, the planes on the two side surfaces of the dividing rib 5 are parallel to or intersect with the plane on which the q-axis is located, when the dividing rib 5 is rectangular, the planes on the two side surfaces of the dividing rib 5 are parallel to the plane on which the q-axis is located, and when the dividing rib 5 is parallelogram-shaped or trapezoid-shaped, the planes on the two side surfaces of the dividing rib 5 intersect with the plane on which the q-axis is located.

In one embodiment, the interval between the innermost magnetic barrier layer close to the shaft hole 6 and the outer circle of the rotor is L3, the interval between the outermost magnetic barrier layer close to the outer circle of the rotor and the outer circle of the rotor is L4, L4 is not less than L3, L4 is not less than 0 and not more than 2.5 delta, and delta is the width of an air gap between the stator and the rotor. L4 is more than or equal to 0 and less than or equal to 2.5 delta, namely the filling groove is an open groove or a closed groove, when the filling groove is the closed groove, the maximum interval between the filling groove and the outer circle of the rotor is limited, and the magnetic leakage can be reduced; l4 is more than or equal to L3, the magnetic leakage of the inner magnetic barrier layer can be reduced, and the mechanical strength of the outer magnetic barrier layer is ensured.

In one embodiment, the interconnected non-independent fill slots 3 and slot slots 2 form a magnetic barrier layer that includes arc and/or straight segments.

In one embodiment, when the magnetic barrier layer includes an arc segment, the arc of the arc segment becomes gradually larger in a direction from the rotor shaft hole 6 to the outer circumference of the rotor, and the outer arc radian of the same magnetic barrier layer is larger than the inner arc radian.

In one embodiment, when the barrier layer includes an arc segment, the width of the arc segment increases in a direction outward from the q-axis along the d-axis.

Because shaft hole 6 has been seted up to rotor core 1's centre, consequently, the arc segment setting mode on foretell magnetic barrier layer can increase the utilization ratio in rotor space, and rational arrangement slot 2 to increase rotor salient pole ratio, promote motor reluctance torque.

In one embodiment, when the barrier layer further comprises straight segments, the straight segments are located on both sides of the arc segment, and the width of the straight segments is constant.

In one embodiment, when the barrier layer comprises arc segments, the width of the magnetic conductive path 7 between adjacent arc segments increases from the q-axis in a direction outward from the d-axis. Because the existence in middle shaft hole 6, therefore, when magnetic conduction passageway 7 and magnetic barrier layer are outside along d axle direction, along with the width of shaft hole on q axle direction diminishes, magnetic conduction passageway 7 and magnetic barrier layer usable width on q axle direction increases gradually, at this moment, in the outside direction along d axle direction, make magnetic conduction passageway 7 and magnetic barrier layer width on the q axle increase progressively, can make rotor core's structure obtain more abundant utilization, also can make magnetic conduction passageway 7 and magnetic barrier layer's width set up more rationally simultaneously, magnetic circuit width changes more rationally, can guarantee that rotor magnetic flux way is close to air gap department and leaves sufficient width, avoid appearing magnetic field saturation, influence the magnetic flux circulation of passageway between the magnetic barrier layer, improve motor performance.

In one embodiment, the ratio of the sum sigma m1 of the widths of the magnetic barrier layers to the width m2 from the shaft hole 6 to the outer circle of the rotor core 1 is 0.4-0.6, so that a reasonable magnetic barrier ratio can be selected, sufficient magnetic barrier width is ensured, a reasonable magnetic flux channel is ensured, and the magnetic circuit supersaturation is prevented while the salient pole ratio of the motor is increased.

In one embodiment, the minimum width of the magnetic conduction channel 7 between two adjacent magnetic barrier layers along the q-axis direction is h1, the minimum width of the magnetic barrier layer with smaller width in the q-axis direction is h2, and h1 is more than or equal to 0.7h 2. The rotor processing difficulty can be reduced by the arrangement, and the uniformity and the unsaturation degree of the magnetic density distribution of the rotor are ensured.

In one embodiment, the filled trenches further include independent filled trenches 4, the independent filled trenches 4 are located outside the non-independent filled trenches 3 along the q-axis direction, and the independent filled trenches 4 individually form the magnetic barrier layer. The difference between the independent filling groove 4 and the dependent filling groove 3 is that the independent filling groove 4 alone becomes a magnetic barrier layer, and the dependent filling groove 3 cooperates with the slit groove 2 to form a magnetic barrier layer.

In one embodiment, in a cross section perpendicular to the central axis of the rotor core 1, an included angle α 1 formed by a line connecting both ends of the independent filling slot 4 and the central axis of the rotor core 1 satisfies 20 ° α 1 ≦ 60 °.

Preferably, 30 DEG-alpha 1-50 deg.

Further preferably, 30 DEG-alpha 1-35 deg. By the arrangement, the independent filling grooves 4 can form the magnetic barrier layer and serve as the filling grooves, so that the magnetic barrier layer can be used as the magnetic barrier layer to increase the reluctance torque of the motor, and can also be used as a starting squirrel cage for improving the starting performance of the motor.

In one embodiment, the rotor core 1 includes a shaft hole 6, and a maximum width of the shaft hole 6 in the q-axis direction is smaller than or equal to a maximum width of the shaft hole 6 in the d-axis direction. Because the slot 2 is arranged in the q-axis direction, the width of the rotor core 1 in the q-axis direction can be increased by the arrangement mode, the utilization rate of a rotor space is increased, the slot 2 is reasonably arranged, the rotor salient pole ratio is increased, and the reluctance torque of the motor is improved.

In one embodiment, the axial bore 6 is comprised of arc and/or straight segments. For example, the shaft hole 6 may be a circular hole, an elliptical hole, a polygonal hole, a kidney-shaped hole, or the like.

In one embodiment, the at least partially filled trench is filled with an electrically conductive and magnetically non-conductive material.

In one embodiment, the filling grooves are connected by self-short-circuiting through end rings at two ends of the rotor to form a squirrel cage structure, and the material of the end rings is the same as that of the filling materials in the filling grooves. The squirrel-cage structure with self-short circuit provides asynchronous torque at the starting stage of the motor so as to realize the self-starting of the motor; the multi-layer magnetic barrier layer structure provides reluctance torque for the motor so as to realize synchronous operation of the motor.

Referring to fig. 2 in combination, it can be seen from comparison between the motor of the embodiment of the present application and the motor of the related art that after the motor of the embodiment of the present application is adopted, the motor efficiency is improved by at least 0.3% under the same torque.

Referring to fig. 3 in combination, it can be seen from comparison between the motor of the embodiment of the present application and the motor of the related art that after the motor of the embodiment of the present application is adopted, the current is effectively reduced, the iron consumption, the aluminum consumption and the copper consumption are all significantly reduced, especially the copper consumption is reduced more significantly, the performance of the motor is improved significantly, and the temperature rise of the motor is significantly reduced. The rated point in the graph is a rated torque point, and the output power at the rated point is a rated power.

Referring to fig. 4 in combination, it can be seen from comparison between the motor of the embodiment of the present application and the motor of the related art that, after the motor of the embodiment of the present application is adopted, the motor can be successfully involved in synchronization and stably operate, and the motor involved synchronization capability is improved.

According to an embodiment of the application, a self-starting synchronous reluctance machine comprises a machine rotor, which is the machine rotor described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (23)

1. The motor rotor is characterized by comprising a rotor core (1), a filling groove and a slit groove (2), wherein the filling groove and the slit groove (2) are arranged on the rotor core (1), the filling groove comprises a non-independent filling groove (3), one non-independent filling groove (3) corresponds to one slit groove (2) and is arranged, the non-independent filling groove (3) is arranged on one side, away from or close to the central axis of the rotor core (1), of the corresponding slit groove (2), and is communicated with the corresponding slit groove (2).

2. The electric machine rotor according to claim 1, characterized in that the mutually communicating non-independent filling slots (3) and the slit slots (2) form a magnetic barrier layer, the number of the slit slots (2) is at least two, the number of the non-independent filling slots (3) is at least two, and at least two of the slit slots (2) and at least two of the non-independent filling slots (3) are arranged along the q-axis direction of the electric machine rotor to form a multilayer magnetic barrier layer.

3. An electric machine rotor according to claim 1, characterized in that the total area of the slot slots (2) in a cross-section perpendicular to the central axis of the rotor core (1) is 40-80% of the total area of the slot slots (2) and the filling slots.

4. An electric machine rotor according to claim 3, characterised in that the total area of the slot slots (2) is 50-70% of the total area of the slot slots (2) and the filling slots.

5. An electric machine rotor according to claim 4, characterised in that the total area of the slot slots (2) is 55-65% of the total area of the slot slots (2) and the filling slots.

6. An electric machine rotor according to claim 1, characterized in that the non-separate filling slot (3) and the slot (2) each extend from both sides of the q-axis in the direction of the d-axis towards the outer circumference of the rotor core (1), there being no barrier between the non-separate filling slot (3) and the slot (2).

7. An electric machine rotor according to claim 1, characterized in that the non-separate filling groove (3) and the slit groove (2) communicating with each other form a magnetic barrier layer provided with partitioning ribs (5), the partitioning ribs (5) partitioning the magnetic barrier layer into at least two segments in the d-axis direction.

8. The electric machine rotor according to claim 7, characterized in that the magnetic barrier layers are at least two layers, and on a cross section perpendicular to the central axis of the rotor core (1), the width of the segmentation rib (5) of the outermost magnetic barrier layer close to the outer circle of the rotor is L1, the width of the segmentation rib (5) of the innermost magnetic barrier layer close to the shaft hole (6) is L2, L1 is more than or equal to L2, L1 is more than or equal to 0.5 delta, and delta is the width of the air gap between the stator and the rotor.

9. The rotor of an electric machine according to claim 2, characterized in that the spacing between the innermost barrier layer near the shaft hole (6) and the outer circumference of the rotor is L3, the spacing between the outermost barrier layer near the outer circumference of the rotor and the outer circumference of the rotor is L4, L4 is equal to or greater than L3, L4 is equal to or greater than 0 and equal to or less than 2.5 delta, delta being the width of the air gap between the stator and the rotor.

10. An electric machine rotor, according to claim 1, characterized in that the mutually communicating non-independently filled slots (3) and slit slots (2) form a magnetic barrier layer comprising arc and/or straight segments.

11. An electric machine rotor, according to claim 10, characterized in that when said barrier layer comprises an arc segment, the arc of said arc segment is gradually larger in a direction from the rotor shaft hole (6) to the outer circumference of the rotor, and the outer arc of the same layer of barrier layer is larger than the inner arc.

12. The electric machine rotor as recited in claim 10, wherein when the magnetic barrier layer includes an arc segment, the arc segment increases in width in an outward direction from the q-axis along the d-axis.

13. An electric machine rotor as claimed in any of claims 11 to 12, wherein when the magnetic barrier layer further comprises straight segments, the straight segments are located on either side of the arc segment.

14. An electric machine rotor, according to claim 10, characterized in that when said magnetic barrier layer comprises arc segments, the width of the magnetic conducting channel (7) between adjacent arc segments increases from the q-axis in an outward direction along the d-axis.

15. An electric machine rotor according to claim 2, characterized in that the ratio of the sum of the widths of the barrier layers Σ m1 to the width m2 of the shaft hole (6) to the outer circumference of the rotor core (1) is in the range of 0.4 to 0.6.

16. The motor rotor as recited in claim 2, characterized in that the minimum width of the magnetic conduction channel (7) between two adjacent magnetic barrier layers along the q-axis direction is h1, the minimum width of the magnetic barrier layer with smaller width in the q-axis direction of the two adjacent magnetic barrier layers is h2, and h1 is more than or equal to 0.7h 2.

17. An electric machine rotor according to claim 1, characterized in that the filled slots further comprise separate filled slots (4), the separate filled slots (4) being located outside the non-separate filled slots (3) in the q-axis direction, the separate filled slots (4) forming a magnetic barrier layer alone.

18. An electric machine rotor according to claim 17, characterized in that, in a cross-section perpendicular to the central axis of the rotor core (1), the angle α 1 formed by the connection of the two ends of the separate filling slot (4) and the central axis of the rotor core (1) satisfies 20 ° ≦ α 1 ≦ 60 °.

19. The electric machine rotor as recited in claim 18, wherein α 1 is 30 ° ≦ 50 °.

20. The electric machine rotor according to claim 1, characterized in that the rotor core (1) comprises a shaft hole (6), and the maximum width of the shaft hole (6) in the q-axis direction is smaller than or equal to the maximum width of the shaft hole (6) in the d-axis direction.

21. An electric machine rotor, according to claim 20, characterized in that said shaft hole (6) consists of arc segments and/or straight segments.

22. The electric machine rotor as recited in claim 1, wherein at least a portion of the filled slots are filled with an electrically and magnetically non-conductive material.

23. A self-starting synchronous reluctance machine comprising a machine rotor, characterized in that said machine rotor is a machine rotor according to any one of claims 1 to 22.

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