Self-starting synchronous reluctance motor

Abstract

The application provides a self-starting synchronous reluctance motor, which comprises a stator assembly and a rotor assembly, the rotor assembly comprises a rotor core and a squirrel cage winding, the rotor core is stacked by a plurality of rotor laminations, the rotor laminations comprise filling slots, slit slots and shaft holes, the filling slots comprise non-independent filling slots located at both ends of the slit slots and independent filling slots located at the outer periphery of a q-axis; the stator assembly comprises a stator core stacked by stator laminations; the stator laminations comprise a plurality of stator slots, the central angle between the radially outermost end of the non-independent filling slots located at the adjacent two sides of a d-axis and the center of the rotor is a1, the central angle between a stator tooth and the center of the rotor is a2, and the following conditions are met: when Z is greater than or equal to 30, a1 is greater than a2; when Z is less than 30, a1 is less than a2. According to the application, the relationship between the magnetic flux channel and the stator slot can be effectively changed, the tooth slot effect and the current harmonic can be reduced, the torque ripple can be reduced, and thus the motor vibration noise can be reduced.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and specifically to a self-starting synchronous reluctance motor. Background Technology

[0002] The self-starting synchronous reluctance motor combines the structural features of induction motors and reluctance motors. It starts by generating torque through squirrel-cage induction and achieves constant speed operation by generating reluctance torque through the difference in rotor inductance. It can be directly connected to a power source for starting and operation. Compared with asynchronous starting permanent magnet motors, the self-starting synchronous reluctance motor does not use rare-earth permanent magnet materials and does not have demagnetization problems. It has lower motor cost and higher reliability.

[0003] However, the rotor of the self-starting reluctance motor has many magnetic channels, which results in large harmonics in the motor's magnetic field and input current, large torque pulsation, and large electromagnetic vibration noise.

[0004] In the prior art, patent CN 207320974 U uses an asymmetrical rotor structure to effectively suppress or reduce electromagnetic noise and electromagnetic vibration caused by torque pulsation in reluctance motors; however, the asymmetrical rotor structure also introduces new harmonics, which may lead to an increase in electromagnetic vibration and noise, and the effect is not obvious.

[0005] Because existing self-starting reluctance motors suffer from technical problems such as large current harmonics and large torque ripple, this invention researches and designs a self-starting synchronous reluctance motor. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of large current harmonics and large torque ripple in the existing self-starting reluctance motor, thereby providing a self-starting synchronous reluctance motor.

[0007] To address the aforementioned problems, this invention provides a self-starting synchronous reluctance motor, comprising a stator assembly and a rotor assembly. The rotor assembly includes a rotor core and a squirrel-cage winding. The rotor core is formed by stacking multiple rotor laminations. Each rotor lamination includes a filling slot, a slit slot, and a shaft hole. The filling slot includes non-independent filling slots located at both ends of the slit slot and independent filling slots located on the outer periphery of the q-axis. The stator assembly includes a stator core formed by stacking stator laminations. Each stator lamination includes multiple stator slots. The radial outermost end of each non-independent filling slot located on adjacent sides of the d-axis has a central angle a1 with respect to the rotor center. The central angle between a stator tooth and the rotor center is a2. The number of stator slots is Z, satisfying the following conditions: when Z≥30, a1>a2; when Z<30, a1<a2.

[0008] In some implementations, the radial outermost end of each of the two adjacent non-independent filling slots on the same side of d is at a central angle with the rotor center, and a1 > a3.

[0009] In some implementations, when Z≤36, a3<a4; where a4 is the stator tooth pitch and a4=360° / Z, and Z is the number of stator teeth / slots.

[0010] In some embodiments, at the half-pole of the rotor, the outer peripheral end of at least one non-independent filling groove opposite to the outer circle of the rotor is bent toward the direction away from or close to the d-axis to form a bent edge; and / or, the outer peripheral end of at least one non-independent filling groove opposite to the outer circle of the rotor is provided with a chamfered edge.

[0011] In some embodiments, at least two adjacent non-independent filling slots have a width d1 between their outer peripheral ends that are relatively close to the outer circle of the rotor and a width d2 between their inner peripheral ends that are relatively close to the inner peripheral ends of the slot, with d1 > d2.

[0012] In some embodiments, the filling grooves are distributed on the outer periphery of the rotor lamination and extend along the d-axis; a plurality of the filling grooves are symmetrically arranged about the d-axis and / or a plurality of the filling grooves are symmetrically arranged about the q-axis; the rotor lamination contains at least five different types of filling grooves with different areas.

[0013] In some embodiments, the independent filling grooves under one pole are in two groups, including an outer group of independent filling grooves and an inner group of independent filling grooves, wherein the outer group of independent filling grooves is located on the q-axis and is the farthest from the shaft hole among the filling grooves; the inner group of independent filling grooves is located between the outer group of independent filling grooves and the non-independent filling grooves.

[0014] In some embodiments, the angle a5 between the two ends of the outer independent filling slot and the rotor center satisfies 30°≤a5≤50°, and a5>2*a4; a4 is the stator tooth pitch, and a4=360° / Z, where Z is the number of stator teeth / slots; the angle a6 between the two ends of the inner independent filling slot and the rotor center satisfies 50°≤a6≤70°.

[0015] In some embodiments, the distance from the end of one of the plurality of non-independent filling slots near the q-axis to the q-axis gradually decreases in the direction away from the d-axis.

[0016] In some embodiments, the slit slot includes an arc segment and / or a straight segment. Between multiple slit slots from the shaft hole side to the outer circle side of the rotor, the curvature of the arc segment gradually increases, and the outer arc curvature of the slit slot in the same layer is greater than its inner arc curvature. The overall shape of the slit slot is convex outward in a direction away from the rotor center.

[0017] In some embodiments, the width of the slit groove in the same layer remains constant or gradually increases from the center of the q-axis to both sides, i.e., d3≤d4; wherein, the width of the slit groove is defined as: the shortest distance from each point on one side of the two sides of the slit groove to the other side.

[0018] In some embodiments, a magnetic channel exists between two adjacent slit slots, and the width of the magnetic channel in the same layer remains constant or gradually increases from the center of the q-axis to both sides; that is, from the q-axis to both sides of the q-axis, the width of the magnetic channel gradually increases, and the width of the magnetic channel is defined as: the shortest distance from each point on one side of the two sides of the magnetic channel to the other side; towards the direction away from the d-axis, the width of each magnetic channel in the q-axis direction gradually decreases.

[0019] In some embodiments, the minimum width d5 ​​of the magnetic channel between the two slit slots is less than or equal to the minimum width d6 of the magnetic channel between the two filling slots at both ends of the slit slot, i.e., d5≤d6.

[0020] In some embodiments, the slit groove is separated from the filling grooves at both ends by a dividing rib, the width L1 of which satisfies: L1≥0.5*σ, where σ is the width of the air gap between the stator and the rotor.

[0021] In some embodiments, the minimum distance between the filling groove and the outer circle of the rotor is L2, which satisfies 0≤L2≤2*σ, where σ is the width of the air gap between the stator and the rotor.

[0022] In some embodiments, at least part of the filling groove is filled with a conductive but non-magnetic material, and a self-short circuit is achieved through the end rings at both ends of the rotor to form a squirrel cage.

[0023] The self-starting synchronous reluctance motor provided by this invention has the following beneficial effects:

[0024] This invention provides a rotor structure for a self-starting synchronous reluctance motor. By setting the angle of the magnetic channel near the outer end of the rotor between the filling slots to correspond with the stator tooth slots, the positional relationship between the magnetic channel and the stator tooth slots can be changed, effectively reducing the cogging effect and harmonics. This solves the problems of large current harmonics and large torque pulsation in self-starting reluctance motors, thereby reducing electromagnetic force and torque pulsation caused by harmonics and reducing motor vibration and noise. Setting a certain angle for the beveled edge further enhances the harmonic reduction effect. This invention also further enhances the harmonic reduction effect by changing the end angle through beveled edges, bending, etc. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the rotor lamination of the self-starting synchronous reluctance motor according to the first embodiment of the present invention;

[0026] Figure 2This is an axial view (semi-circular structure) of the rotor of the self-starting synchronous reluctance motor according to the first embodiment of the present invention;

[0027] Figure 3 This is a structural diagram of the rotor lamination of the self-starting synchronous reluctance motor according to the second embodiment of the present invention;

[0028] Figure 4 This is a comparison curve of the motor structure of the present invention and the current waveform of the prior art;

[0029] Figure 5 This is a comparison curve of the motor structure of the present invention and the torque pulsation of the prior art.

[0030] The reference numerals in the attached figures are as follows:

[0031] 1. Rotor lamination; 12. Rotor outer diameter; 2. Filler groove; 20. Outer peripheral end; 21. Non-independent filler groove; 22. Independent filler groove; 23. Inner peripheral end; 22a. Outer group independent filler groove; 22b. Inner group independent filler groove; 3. Slit groove; 4. Shaft hole; 5. Bending edge; 6. Beveled edge; 7. Dividing rib; 8. End ring; 9. Stator lamination; 10. Stator slot; 11. Stator gear shoe; 13. Magnetic guide channel. Detailed Implementation

[0032] like Figure 1-5 As shown, this invention provides a self-starting synchronous reluctance motor, comprising a stator assembly and a rotor assembly. The rotor assembly includes a rotor core and a squirrel-cage winding. The rotor core is formed by stacking multiple rotor laminations 1. Each rotor lamination 1 includes a filling slot 2, a slit slot 3, and a shaft hole 4. The filling slot 2 includes non-independent filling slots 21 located at both ends of the slit slot 3 and independent filling slots 22 located on the outer periphery of the q-axis. The stator assembly includes a stator core formed by stacking stator laminations 9. Each stator lamination 9 includes multiple stator slots 10. The radial outermost end of each of the non-independent filling slots 21 located on adjacent sides of the d-axis has a central angle a1 with respect to the rotor center. The central angle between a stator tooth and the rotor center is a2. The number of stator slots is Z, satisfying the following conditions: when Z≥30, a1>a2; when Z<30, a1<a2.

[0033] This invention provides a rotor structure for a self-starting synchronous reluctance motor. The number of slots affects the stator tooth angle. By setting the angle of the magnetic channel near the outer end of the rotor to correspond with the stator tooth slot, the positional relationship between the magnetic channel and the stator tooth slot can be changed, effectively reducing the cogging effect and harmonics. This solves the problems of large current harmonics and large torque pulsation in self-starting reluctance motors, thereby reducing electromagnetic force and torque pulsation caused by harmonics and reducing motor vibration noise. Setting a certain angle for the beveled edge further enhances the harmonic reduction effect. This invention also further enhances the harmonic reduction effect by changing the end angle through beveled edges, bending, etc.

[0034] A self-starting synchronous reluctance motor includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor core and a squirrel-cage winding. The rotor core is formed by stacking rotor laminations. Figure 1 The diagram shows the rotor lamination of the present invention. The rotor lamination 1 has multiple filling grooves 2 and slit grooves 3, as well as shaft holes 4 that mate with the rotating shaft. The filling grooves 2 include non-independent filling grooves 21 located at both ends of the slit groove and independent filling grooves 22 located on the outer periphery of the q-shaft. The stator assembly includes an iron core formed by stacked stator laminations with slots. Figure 2 The diagram shows the stator and rotor laminations of this invention. Its characteristic is that the central angle between the outer ends of the non-independent filling slots 21 on both sides of the d-axis is a1, the central angle occupied by one stator tooth shoe is a2, and the number of stator slots is Z, satisfying: when Z≥30, a1>a2; when Z<30, a1<a2; by setting the correspondence between the angle occupied by the magnetic conductive channel between the filling slots near the outer end of the rotor and the stator tooth slot, the tooth slotting effect and harmonics are effectively reduced; for example... Figure 4 As shown, after adopting the existing technology, the input current waveform of the motor has a good sine wave and the current harmonics are reduced.

[0035] In some embodiments, the radial outermost end of each of two adjacent non-independent filling grooves 21 located on the same side of the d-axis has a central angle between the rotor center and the center of the rotor, and a1 > a3.

[0036] In some implementations, when Z≤36, a3<a4; where a4 is the stator tooth pitch and a4=360° / Z, and Z is the number of stator teeth / slots.

[0037] The present invention, through the aforementioned dimensional settings, enables the magnetic conductive channels between the filling slots and the tangential forces generated on the left and right sides of the stator tooth slots to cancel each other out, thereby reducing torque pulsation; for example... Figure 5 As shown, the motor torque pulsation is significantly reduced after adopting the existing technology.

[0038] In some embodiments, at the half-pole of the rotor, the outer peripheral end 20 of at least one non-independent filling groove 21 opposite to the rotor outer circle 12 is bent in a direction away from or close to the d-axis to form a bent edge 5; and / or, the outer peripheral end 20 of at least one non-independent filling groove 21 opposite to the rotor outer circle 12 is provided with a chamfered edge 6. The chamfered edge of the present invention changes the width of the end of the magnetic channel on the one hand, and reduces magnetic field abrupt changes on the other hand, thereby reducing magnetic field pulsation and torque pulsation.

[0039] In some embodiments, at least two adjacent non-independent filling slots 21 have a width d1 along the q-axis between their outer peripheral ends 20 near the outer circle 12 of the rotor and a width d2 along the q-axis between their inner peripheral ends 23 near the slit slot 3, with d1 > d2. The present invention effectively ensures that the magnetic conductive channel remains unsaturated through these dimensions.

[0040] In some embodiments, the filling grooves 2 are distributed on the outer periphery of the rotor lamination, and the filling grooves 2 extend along the d-axis direction; a plurality of the filling grooves 2 are symmetrically arranged about the d-axis and / or a plurality of the filling grooves 2 are symmetrically arranged about the q-axis; the rotor lamination contains at least 5 different types of filling grooves.

[0041] In some embodiments, the independent filling groove 22 under one pole is in two groups, including an outer group of independent filling grooves 22a and an inner group of independent filling grooves 22b, wherein the outer group of independent filling grooves 22a is located on the q-axis and is the farthest from the shaft hole 4 in the filling groove 2; the inner group of independent filling grooves 22b is located between the outer group of independent filling grooves 22a and the non-independent filling groove 21.

[0042] In some embodiments, the angle a5 between the two ends of the outer independent filling groove 22a and the rotor center satisfies 30°≤a5≤50°, and a5>2*a4; a4 is the stator tooth pitch, and a4=360° / Z, where Z is the number of stator teeth / slots; the angle a6 between the two ends of the inner independent filling groove 22b and the rotor center satisfies 50°≤a6≤70°.

[0043] In some embodiments, the distance from the end of one of the multiple non-independent filling slots 21 closest to the q-axis to the q-axis gradually decreases in the direction away from the d-axis. The distance from the end of the non-independent filling slot near the magnetic barrier to the q-axis in this invention gradually decreases in the direction away from the d-axis, while the independent filling slots increase the number and area of ​​filling slots, improving the motor's starting capability.

[0044] In some embodiments, the slit groove 3 includes an arc segment and / or a straight segment. Among the multiple slit grooves 3 from the side of the shaft hole 4 to the side of the outer circle 12 of the rotor, the curvature of the arc segment gradually increases, and the outer arc curvature of the slit groove in the same layer is greater than its inner arc curvature. The overall shape of the slit groove 3 is convex outward in a direction away from the center of the rotor.

[0045] In some embodiments, the width of the slit groove 3 in the same layer remains constant or gradually increases from the center of the q axis to both sides, i.e., d3≤d4; wherein, the width of the slit groove is defined as: the shortest distance from each point on one side of the two sides of the slit groove to the other side.

[0046] This invention achieves this by gradually decreasing the width of each magnetic channel in the q-axis direction away from the d-axis; increasing the magnetic reluctance in the q-axis direction through slit slots, thus reducing the q-axis inductance; and utilizing slit slots of varying widths to effectively utilize rotor space and further increase the magnetic reluctance in the q-axis direction. The varying widths of the magnetic channels also prevent rotor over-saturation and increase the d-axis flux.

[0047] In some embodiments, there is a magnetic channel 13 between two adjacent slit slots 3. The width of the magnetic channel 13 in the same layer remains constant or gradually increases from the center of the q-axis to both sides; that is, from the q-axis to both sides of the q-axis, the width of the magnetic channel gradually increases. The width of the magnetic channel is defined as the shortest distance from each point on one side of the magnetic channel to the other side. In the direction away from the d-axis, the width of each magnetic channel in the q-axis direction gradually decreases.

[0048] In some embodiments, the minimum width d5 ​​of the magnetic channel 13 between the two slit slots 3 is less than or equal to the minimum width d6 of the magnetic channel 13 between the two filling slots at both ends of the slit slot, i.e., d5 ≤ d6; more preferably, d6 / d5 is greater than 1.15. By setting it in this way, the present invention can effectively avoid rotor oversaturation.

[0049] In some embodiments, the slit groove 3 is separated from the filling grooves 2 at both ends by a dividing rib 7, the width L1 of the dividing rib 7 satisfying: L1≥0.5*σ, where σ is the width of the air gap between the stator and the rotor.

[0050] In some embodiments, the minimum distance between the filling groove 2 and the outer circle 12 of the rotor is L2, which satisfies 0≤L2≤2*σ, where σ is the width of the air gap between the stator and the rotor.

[0051] This invention reduces magnetic leakage while ensuring a certain level of rotor mechanical strength by setting an appropriate width for the dividing ribs.

[0052] In some embodiments, at least part of the filling slots are filled with a conductive but non-magnetic material, and a self-short circuit is achieved through the end rings 8 at both ends of the rotor, forming a squirrel cage. When the motor starts, the squirrel cage generates asynchronous torque to start the motor.

[0053] This invention provides a self-starting synchronous reluctance motor, including a stator assembly and a rotor assembly. The rotor assembly includes a rotor core and a squirrel-cage winding. The rotor core is formed by stacking rotor laminations. The rotor laminations 1 are provided with multiple filling slots 2 and slit slots 3, as well as shaft holes 4 that mate with the rotating shaft. The filling slots 2 include non-independent filling slots 21 located at both ends of the slit slots and independent filling slots 22 located on the outer periphery of the q-axis. The stator assembly includes a core formed by stacking stator laminations with slots. The invention is characterized in that the center angle between the outer ends of the non-independent filling slots 21 on both sides of the d-axis is a1, the center angle of one stator tooth shoe is a2, and the number of stator slots is Z, satisfying: when Z≥30, a1>a2; when Z<30, a1<a2.

[0054] The central angle a1 between the outer ends of the non-independent filling grooves 21 on both sides of the d-axis is greater than the central angle a3 between the outer ends of two adjacent non-independent filling grooves 21 on the same side, i.e., a1 > a3; characterized in that when Z ≤ 36, a3 < a4; stator tooth pitch a4 = 360° / Z, where Z is the number of stator teeth / number of grooves;

[0055] In the half-pole configuration, at least one non-independent filling groove is bent away from or near the d-axis near its outer peripheral end; furthermore, at least the non-independent filling groove closest to the d-axis has a chamfered edge near its outer peripheral end.

[0056] At least one pair of adjacent non-independent filling slots has a width d1 between the ends of the filling slots near the outer periphery of the rotor that is different from the width d2 between the ends of the filling slots near the slit slots.

[0057] Therefore, by setting the angle of the magnetic channel between the filling slots near the outer end of the rotor to correspond with the stator tooth slot, the present invention changes the positional relationship between the magnetic channel and the stator tooth slot, effectively reducing the cogging effect and harmonics, thereby reducing motor vibration noise.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A self-starting synchronous reluctance motor, characterized in that: The system includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor core and a squirrel cage winding. The rotor core is formed by stacking multiple rotor laminations (1). The rotor laminations (1) include filling slots (2), slit slots (3), and shaft holes (4). The filling slots (2) include non-independent filling slots (21) located at both ends of the slit slots (3) and independent filling slots (22) located on the outer periphery of the q-axis. The stator assembly includes a stator core formed by stacking stator laminations (9). The stator laminations (9) include multiple stator slots (10). The radial outermost end of the non-independent filling slots (21) located on both sides of the d-axis has a center angle between the outermost end and the rotor center. The center angle between a stator tooth shoe and the rotor center is a2. The number of stator slots is Z, which satisfies the following conditions: when Z≥30, a1>a2; when Z<30, a1<a2. The independent filling grooves (22) under the same magnetic pole are in two groups, including an outer independent filling groove (22a) and an inner independent filling groove (22b). The outer independent filling groove (22a) is located on the q-axis and is the furthest from the shaft hole (4) in the filling groove (2). The inner independent filling groove (22b) is located between the outer independent filling groove (22a) and the non-independent filling groove (21). The angle a5 between the two ends of the outer independent filling groove (22a) and the rotor center satisfies 30°≤a5≤50°, and a5>2*a4; a4 is the stator tooth pitch, and a4=360° / Z, where Z is the number of stator teeth / slots; the angle a6 between the two ends of the inner independent filling groove (22b) and the rotor center satisfies 50°≤a6≤70°.

2. The self-starting synchronous reluctance motor according to claim 1, characterized in that: The radial outermost end of each of the two adjacent non-independent filling slots (21) located on the same side of d has a center angle between the rotor center and the center of the rotor, and a1 > a3.

3. The self-starting synchronous reluctance motor according to claim 2, characterized in that: When Z≤36, a3<a4; where a4 is the stator tooth pitch and a4=360° / Z, Z is the number of stator teeth or slots.

4. The self-starting synchronous reluctance motor according to claim 1, characterized in that: At the half pole of the rotor, at least one non-independent filling groove (21) has an outer peripheral end (20) opposite to the outer circle (12) of the rotor bent in a direction away from or close to the d-axis to form a bent edge (5); and / or, at least one non-independent filling groove (21) has an outer peripheral end (20) opposite to the outer circle (12) of the rotor with a chamfered edge (6).

5. The self-starting synchronous reluctance motor according to claim 1, characterized in that: There are at least two adjacent non-independent filling grooves (21) with a width d1 relative to the outer peripheral end (20) of the rotor outer circle (12) along the q axis, and a width d2 relative to the inner peripheral end (23) of the slit groove (3) along the q axis, and d1 > d2.

6. The self-starting synchronous reluctance motor according to claim 1, characterized in that: The filling grooves (2) are distributed on the outer periphery of the rotor lamination and extend along the d-axis direction; multiple filling grooves (2) are arranged symmetrically about the d-axis and / or multiple filling grooves (2) are arranged symmetrically about the q-axis; the rotor lamination contains at least 5 different types of filling grooves.

7. The self-starting synchronous reluctance motor according to claim 1, characterized in that: The distance from the end of the multiple non-independent filling grooves (21) near the q-axis to the q-axis gradually decreases in the direction away from the d-axis.

8. The self-starting synchronous reluctance motor according to claim 1, characterized in that: The slit groove (3) includes an arc segment and / or a straight segment. Between the multiple slit grooves (3) from the shaft hole (4) side to the outer circle (12) side of the rotor, the arc of the arc segment gradually increases, and the outer arc of the slit groove in the same layer is greater than its inner arc. The overall shape of the slit groove (3) is convex outward in a direction away from the rotor center.

9. The self-starting synchronous reluctance motor according to claim 1, characterized in that: The width of the slit groove (3) in the same layer remains constant or gradually increases from the center of the q axis to both sides, i.e., d3≤d4; where the width of the slit groove is defined as: the shortest distance from each point on one side of the two sides of the slit groove to the other side.

10. The self-starting synchronous reluctance motor according to claim 1, characterized in that: There is a magnetic channel (13) between two adjacent slit slots (3). The width of the magnetic channel (13) in the same layer remains unchanged or gradually increases from the center of the q axis to both sides. That is, from the q axis to both sides of the q axis, the width of the magnetic channel gradually increases. The width of the magnetic channel is defined as the shortest distance from each point on one side of the magnetic channel to the other side. In the direction away from the d axis, the width of each magnetic channel in the q axis direction gradually decreases.

11. The self-starting synchronous reluctance motor according to any one of claims 1-10, characterized in that: The minimum width d5 ​​of the magnetic channel (13) between the two slit slots (3) is less than or equal to the minimum width d6 of the magnetic channel (13) between the two filling slots at both ends of the slit slot, i.e., d5≤d6.

12. The self-starting synchronous reluctance motor according to any one of claims 1-10, characterized in that: The slit groove (3) is separated from the filling grooves (2) at both ends by a dividing rib (7). The width L1 of the dividing rib (7) satisfies: L1≥0.5*σ, where σ is the width of the air gap between the stator and the rotor.

13. The self-starting synchronous reluctance motor according to claim 1, characterized in that: The minimum distance between the filling groove (2) and the outer circle (12) of the rotor is L2, which satisfies 0≤L2≤2*σ, where σ is the width of the air gap between the stator and the rotor.

14. The self-starting synchronous reluctance motor according to claim 1, characterized in that: At least part of the filling slot is filled with a conductive but non-magnetic material, and the rotor is self-short-circuited through the end rings (8) at both ends of the rotor to form a squirrel cage.

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