阅读说明：本技术 一种转子铁芯、异步起动同步磁阻电机及屏蔽泵 (Rotor core, asynchronous starting synchronous reluctance motor and shield pump ) 是由 韩元平 欧阳兆胜 于 2020-12-31 设计创作，主要内容包括：本发明涉及屏蔽泵技术领域,公开了一种转子铁芯,异步起动同步磁阻电机及屏蔽泵,该转子铁芯包括：叠压在一起的设定数量的转子冲片；转子冲片的中心设置有圆形的转轴孔,用于使转轴穿过转子冲片；转子铁芯的Q轴轴线和D轴轴线相交于转轴孔的圆心；转子冲片包括多个沿Q轴轴向延伸的转子磁桥,相邻的转子磁桥之间通过两个连接筋相连接,两个连接筋和与其连接的两个转子磁桥所围成的区域为转子隔磁槽,位于连接筋远离转子隔磁槽一侧的区域为导体槽；转子磁桥和转子隔磁槽以交替排布的方式沿D轴向远离Q轴的方向布置在Q轴的两侧；转子冲片分别相对于Q轴和D轴对称。本发明通过对转子铁芯结构的优化大幅提升了磁阻转矩,进而大幅提升了电机效率。(The invention relates to the technical field of canned motor pumps, and discloses a rotor core, an asynchronous starting synchronous reluctance motor and a canned motor pump, wherein the rotor core comprises: a set number of rotor sheets stacked together; a circular rotating shaft hole is formed in the center of the rotor punching sheet and used for enabling the rotating shaft to penetrate through the rotor punching sheet; the axis of the shaft Q of the rotor core is intersected with the axis of the shaft D at the center of the rotating shaft hole; the rotor punching sheet comprises a plurality of rotor magnetic bridges axially extending along the Q shaft, adjacent rotor magnetic bridges are connected through two connecting ribs, the area defined by the two connecting ribs and the two rotor magnetic bridges connected with the two connecting ribs is a rotor magnetism isolating groove, and the area positioned on one side of the connecting ribs, which is far away from the rotor magnetism isolating groove, is a conductor groove; the rotor magnetic bridges and the rotor magnetism isolating grooves are arranged on two sides of the Q shaft along the direction of the D shaft far away from the Q shaft in an alternate arrangement mode; the rotor punching sheets are respectively symmetrical relative to the Q shaft and the D shaft. According to the invention, the reluctance torque is greatly improved by optimizing the structure of the rotor iron core, so that the motor efficiency is greatly improved.)

1. A rotor core is characterized by comprising a set number of rotor punching sheets which are laminated together;

a circular rotating shaft hole is formed in the center of the rotor punching sheet and used for enabling a rotating shaft to penetrate through the rotor punching sheet; the axis of the Q shaft and the axis of the D shaft of the rotor core are intersected at the circle center of the rotating shaft hole;

the rotor punching sheet comprises a plurality of rotor magnetic bridges axially extending along the Q shaft, adjacent rotor magnetic bridges are connected through two connecting ribs, the area defined by the two connecting ribs and the two rotor magnetic bridges connected with the two connecting ribs is a rotor magnetism isolating groove, and the area positioned on one side of the connecting ribs, which is far away from the rotor magnetism isolating groove, is a conductor groove;

the rotor magnetic bridges and the rotor magnetism isolating grooves are arranged on two sides of the Q shaft along the direction of the D shaft away from the Q shaft in an alternating arrangement mode;

the rotor punching sheet is symmetrical relative to the shaft Q and the shaft D respectively.

2. The rotor core of claim 1 wherein the plurality of rotor magnetic bridges extending axially along the Q-axis comprise: the rotor punching structure comprises a central rotor magnetic bridge positioned in the middle of the rotor punching, end rotor magnetic bridges respectively positioned at two ends of the rotor punching along the D-axis direction, and a plurality of middle rotor magnetic bridges positioned between the central rotor magnetic bridge and the two end rotor magnetic bridges.

3. The rotor core of claim 2, wherein for a plurality of said rotor bridges on a same side of said D-axis, wherein,

the ratio of the minimum width of the middle rotor magnetic bridge closest to the D shaft to the minimum width of each of the rest middle rotor magnetic bridges is not less than 5/6 and not more than 1.25.

4. The rotor core according to claim 2, wherein for a plurality of said rotor bridges and a plurality of said rotor flux barriers on the same side of said D-axis, wherein,

the minimum width of the middle rotor magnetic bridge is not less than the minimum width of the rotor magnetism isolating groove adjacent to the middle rotor magnetic bridge and close to the D shaft;

the maximum width of the end rotor magnetic bridge along the D-axis direction is not less than the minimum width of the rotor magnetism isolating groove adjacent to the end rotor magnetic bridge; and is

And the ratio of the minimum width of the rotor magnetism isolating groove closest to the D shaft to the minimum width of each of the rest rotor magnetism isolating grooves is not less than 2/3 and not more than 2.

5. The rotor core according to claim 1, wherein the boundary line of any one of the rotor flux barriers of the rotor sheet and the conductor grooves (319) on the left and right sides of the rotor flux barrier satisfies the following relationship:

a boundary line L1 of the left conductor groove far away from the Q axis is collinear with a boundary line L3 of the rotor magnetism isolating groove, which is located on the left side of the D axis and far away from the Q axis;

a boundary line L7 of the right conductor groove far away from the Q axis is collinear with a boundary line L5 of the rotor magnetism isolating groove, which is located on the right side of the D axis and far away from the Q axis;

a boundary line L2 of the left conductor groove close to the Q axis is collinear with a boundary line L4 of the rotor magnetism isolating groove, which is located on the left side of the D axis and close to the Q axis;

a boundary line L8 of the right conductor groove close to the Q axis is collinear with a boundary line L6 of the rotor magnetism isolating groove, which is located on the right side of the D axis and close to the Q axis;

an arc C1 of the rotor magnetism isolating groove far away from the Q shaft is tangent to the boundary line L3 and the boundary line L5 of the rotor magnetism isolating groove respectively;

an arc C2 of the rotor magnetism isolating groove far away from the Q shaft is tangent to the boundary line L4 and the boundary line L6 of the rotor magnetism isolating groove respectively.

6. The rotor core according to claim 5, wherein an included angle δ between the boundary line L3 and the boundary line L5 of any one of the rotor flux barriers of the rotor sheet is not smaller than an included angle ε between the boundary line L4 and the boundary line L6.

7. The rotor core according to claim 5, wherein the boundary line L3 of each rotor flux-barrier slot on the same side as the D-axis makes an angle δ equal to or sequentially increasing in a direction away from the D-axis with respect to the boundary line L5, and is not greater than 180 °.

8. The rotor core of claim 1, wherein the areas of all the conductor slots on the rotor sheet are the same.

9. An asynchronously started synchronous reluctance machine comprising: a stator core, a stator winding, a rotor core according to any one of claims 1-8, a rotating shaft, a conductor and an injection molding compound;

the rotor core is arranged in the stator core, the rotating shaft penetrates through a rotating shaft hole in the rotor core, the conductor pieces are sequentially filled in conductor grooves in the rotor core, and the injection molding material is filled in rotor magnetism isolating grooves in the rotor core.

10. A canned motor pump comprising the asynchronously started synchronous reluctance motor of claim 9.

Technical Field

The invention relates to the technical field of a shield pump, in particular to a rotor core, an asynchronous starting synchronous reluctance motor and a shield pump.

Background

With the increasing awareness of consumers on energy conservation and emission reduction, the energy efficiency requirement on the hot water circulating pump is increased. On the other hand, the technical field of the hot water circulating pump is more and more mature, the industry competition pressure is more and more, and the requirement on the cost is increased along with the increase;

most of existing hot water circulating pumps use single-phase asynchronous motors, although the cost is low, extra energy consumption is needed for generating rotor magnetic fields in the asynchronous motors, and therefore the efficiency of the asynchronous motors is low, and further the efficiency of pumps using the asynchronous motors is low. Furthermore, the rotational speed of the asynchronous motor is influenced by load, temperature and voltage fluctuations, which in turn influences the stability of the pump output characteristic. When a permanent magnet synchronous motor is used in a hot water circulating pump to improve efficiency, a driver and a permanent magnet need to be newly added, so that the cost is increased by at least 50%, and the cost and pressure of the pump are high. In addition, the permanent magnet in the permanent magnet synchronous motor has demagnetization risk, which will affect the service life of the motor.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a rotor core, an asynchronous starting synchronous reluctance motor and a shield pump, which have optimized structures and can greatly improve the motor efficiency, aiming at overcoming the defects of the prior art.

(II) technical scheme

In order to solve the above problems, the present invention provides a rotor core including: a set number of rotor sheets stacked together; a circular rotating shaft hole is formed in the center of the rotor punching sheet and used for enabling a rotating shaft to penetrate through the rotor punching sheet; the axis of the Q shaft and the axis of the D shaft of the rotor core are intersected at the circle center of the rotating shaft hole; the rotor punching sheet comprises a plurality of rotor magnetic bridges axially extending along the Q shaft, adjacent rotor magnetic bridges are connected through two connecting ribs, the area defined by the two connecting ribs and the two rotor magnetic bridges connected with the two connecting ribs is a rotor magnetism isolating groove, and the area positioned on one side of the connecting ribs, which is far away from the rotor magnetism isolating groove, is a conductor groove; the rotor magnetic bridges and the rotor magnetism isolating grooves are arranged on two sides of the Q shaft along the direction of the D shaft away from the Q shaft in an alternating arrangement mode; the rotor punching sheet is symmetrical relative to the shaft Q and the shaft D respectively.

Optionally, the plurality of rotor magnetic bridges extending axially along the Q-axis comprises: the rotor punching structure comprises a central rotor magnetic bridge positioned in the middle of the rotor punching, end rotor magnetic bridges respectively positioned at two ends of the rotor punching along the D-axis direction, and a plurality of middle rotor magnetic bridges positioned between the central rotor magnetic bridge and the two end rotor magnetic bridges.

Optionally, for a plurality of the rotor magnetic bridges located on the same side of the D-axis, a ratio of a minimum width of an intermediate rotor magnetic bridge closest to the D-axis to a minimum width of each of the remaining intermediate rotor magnetic bridges is not less than 5/6 and not more than 1.25.

Optionally, for a plurality of rotor magnetic bridges and a plurality of rotor magnetic isolation grooves which are positioned on the same side of the D axis, the minimum width of the intermediate rotor magnetic bridge is not less than the minimum width of the rotor magnetic isolation groove adjacent to the intermediate rotor magnetic bridge and close to the D axis; the maximum width of the end rotor magnetic bridge along the D-axis direction is not less than the minimum width of the rotor magnetism isolating groove adjacent to the end rotor magnetic bridge; and the ratio of the minimum width of the rotor magnetism isolating groove closest to the D shaft to the minimum width of each of the rest rotor magnetism isolating grooves is not less than 2/3 and not more than 2.

Optionally, a boundary line of any one of the rotor flux barriers of the rotor sheet and the conductor grooves on the left and right sides of the rotor flux barriers satisfies the following relationship: a boundary line L1 of the left conductor groove far away from the Q axis is collinear with a boundary line L3 of the rotor magnetism isolating groove, which is located on the left side of the D axis and far away from the Q axis; a boundary line L7 of the right conductor groove far away from the Q axis is collinear with a boundary line L5 of the rotor magnetism isolating groove, which is located on the right side of the D axis and far away from the Q axis; a boundary line L2 of the left conductor groove close to the Q axis is collinear with a boundary line L4 of the rotor magnetism isolating groove, which is located on the left side of the D axis and close to the Q axis; a boundary line L8 of the right conductor groove close to the Q axis is collinear with a boundary line L6 of the rotor magnetism isolating groove, which is located on the right side of the D axis and close to the Q axis; an arc C1 of the rotor magnetism isolating groove far away from the Q shaft is tangent to the boundary line L3 and the boundary line L5 of the rotor magnetism isolating groove respectively; an arc C2 of the rotor magnetism isolating groove far away from the Q shaft is tangent to the boundary line L4 and the boundary line L6 of the rotor magnetism isolating groove respectively.

Optionally, an included angle δ between the boundary line L3 of any one of the rotor flux barriers of the rotor sheet and the boundary line L5 is not smaller than an included angle e between the boundary line L4 and the boundary line L6.

Optionally, the boundary line L of each rotor magnetism isolating groove on the same side of the D axis has an included angle δ with the boundary line L equal to or sequentially increasing in a direction away from the D axis, and is not greater than 180 °.

Optionally, all the conductor slots on the rotor sheet have the same area.

In another aspect, the present invention further provides an asynchronously started synchronous reluctance motor, including: the stator core, the stator winding, the rotor core, the rotating shaft, the conductor and the injection molding material; the rotor core is arranged in the stator core, the rotating shaft penetrates through a rotating shaft hole in the rotor core, the conductor pieces are sequentially filled in conductor grooves in the rotor core, and the injection molding material is filled in rotor magnetism isolating grooves in the rotor core.

In a third aspect, the invention also provides a canned motor pump comprising the above-mentioned asynchronous starting synchronous reluctance motor.

(III) advantageous effects

According to the rotor core provided by the invention, through the optimization of the rotor core structure, the magnetic resistance conditions of a Q-axis magnetic circuit and a D-axis magnetic circuit are changed through the reasonable design of the positions and the sizes of a plurality of rotor magnetism isolating grooves and a plurality of rotor magnetic bridges, and on the other hand, the magnetic bridge width in the D-axis magnetic circuit direction is further reduced while the structural strength of the rotor is ensured through the design of filling injection molding materials in the magnetism isolating grooves, so that the D-axis magnetic resistance is further increased, the magnetic flux difference value of the Q-axis magnetic circuit and the D-axis magnetic circuit is greatly improved, the magnetic resistance torque is greatly improved, and the motor efficiency is greatly improved. The efficiency level of the permanent magnet synchronous motor is close to that of the permanent magnet synchronous motor with the same specification, and the cost of the permanent magnet synchronous motor is greatly reduced compared with that of the permanent magnet synchronous motor. In addition, because the rotor does not contain the permanent magnet, there is not demagnetization risk in hot water circulating pump high temperature application occasion to promote the motor life-span.

The asynchronous starting synchronous reluctance motor using the rotor core enables the motor to have the characteristics of an asynchronous motor and a synchronous motor at the same time, a squirrel cage rotor structure formed by a plurality of conductor groove structures realizes the asynchronous starting process, and D-axis and Q-axis unequal reluctance structures formed by a plurality of rotor magnetism isolating grooves provide reluctance torque for stable synchronous operation. When the motor operates in a steady-state synchronous mode, the rotor squirrel-cage structure does not generate current, so that extra energy consumption is avoided, and the steady-state operation efficiency of the motor is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic structural diagram of a rotor sheet in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of any rotor magnetism isolating groove of the rotor sheet in the embodiment of the invention;

FIG. 3 is a schematic view of an included angle of a boundary line of any one of the rotor magnetism isolating grooves of the rotor punching sheet in the embodiment of the invention;

FIG. 4 is a schematic view of an included angle between boundary lines of a plurality of rotor flux barriers of a rotor sheet according to an embodiment of the present invention;

FIG. 5 is a schematic magnetic circuit diagram of the D axis and the Q axis of the rotor sheet in the embodiment of the invention;

fig. 6 is a schematic plan view of a structure of an asynchronously started synchronous reluctance motor in an embodiment of the present invention;

fig. 7 is a schematic plan view showing the structure of an asynchronously-started synchronous reluctance motor in which a rotor core is provided with a 24-slot stator core in an embodiment of the present invention;

fig. 8 is a schematic plan view showing the structure of an asynchronously-started synchronous reluctance motor in which a rotor core is provided with a 36-slot stator core in an embodiment of the present invention.

The reference numbers in the drawings are, in order:

1. stator core, 2, stator winding, 3, rotor core, 31, rotor punching sheet, 310, end rotor magnetic bridge, 312&314&316, middle rotor magnetic bridge, 318, central rotor magnetic bridge, 311&313&315&317, rotor magnetism isolating groove, 319, conductor groove, 320, rotating shaft hole, 330, connecting rib, 4, rotating shaft, 5, conductor, 6 and injection molding material.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the examples and the accompanying drawings. The following examples of the present invention are provided herein to illustrate the present invention, but are not intended to limit the scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a rotor core, which includes a set number of stacked rotor sheets 31, where a circular rotating shaft hole 320 is provided in the center of each rotor sheet 31, and is used for allowing a rotating shaft 4 to pass through the rotor sheets 31; the axis of the shaft Q of the rotor core is intersected with the axis of the shaft D at the center of the rotating shaft hole 320; the rotor sheet 31 includes a plurality of rotor magnetic bridges extending along the Q axis, adjacent rotor magnetic bridges are connected by two connecting ribs 330, a space between the two connecting ribs 330 and the rotor magnetic bridge connected thereto is a rotor magnetism isolating groove, and a space on one side of the connecting rib 330 away from the rotor magnetism isolating groove is a conductor groove 319; the rotor magnetic bridges and the rotor magnetism isolating grooves are arranged on two sides of the Q shaft along the direction of the D shaft far away from the Q shaft in an alternate arrangement mode; the rotor lamination 31 is symmetrical with respect to the Q axis and the D axis, respectively.

In this embodiment, the Q axis is a horizontal axis passing through the center of the rotating shaft hole 320 located at the center of the rotor sheet 31, the D axis is a vertical axis passing through the center of the rotating shaft hole 320, and the Q axis is perpendicular to the D axis. The rotor sheet 31 includes 9 rotor magnetic bridges, each of which extends axially along the Q-axis, and each of which has a shape symmetrical with respect to the D-axis. Two adjacent rotor magnetic bridges are connected through two connecting ribs 330; the two connecting ribs 330 are identical in shape and are symmetrically arranged with respect to the D axis.

As shown in fig. 1, on one side of the Q axis, a rotor magnetic bridge 318, a rotor magnetic isolation groove 317, a rotor magnetic bridge 316, a rotor magnetic isolation groove 315, a rotor magnetic bridge 314, a rotor magnetic isolation groove 313, a rotor magnetic bridge 312, a rotor magnetic isolation groove 311, and a rotor magnetic bridge 310 are arranged in this order in the direction away from the Q axis along the D axis. The adjacent rotor magnetic bridges 318 and 316 are connected through two connecting ribs 330 and form a rotor magnetism isolating groove 317, and a conductor groove 319 is respectively arranged at the left side and the right side of the rotor magnetism isolating groove 317; the adjacent rotor magnetic bridges 316 and 314 are connected by two connecting ribs 330 and form a rotor magnetism isolating groove 315; and so on, and there is one conductor slot 319 on each side of the rotor flux barrier slot. On the other side of the Q axis, the rotor magnetic bridges and the rotor flux barriers are arranged in the same manner, so that the rotor sheet 31 is also symmetrical with respect to the Q axis.

Further, the plurality of rotor bridges extending axially along the Q-axis includes: the rotor punching structure comprises a central rotor magnetic bridge 318 positioned in the middle of the rotor punching, end rotor magnetic bridges respectively positioned at two ends of the rotor punching along the D-axis direction, and a plurality of middle rotor magnetic bridges positioned between the central rotor magnetic bridge and the two end rotor magnetic bridges. As shown in fig. 1, in the present embodiment, the shape of the central rotor magnetic bridge 318 is symmetrical with respect to the Q-axis and the D-axis, and the rotation axis hole 320 is located at the center of the central rotor magnetic bridge 318. Taking the rotor magnetic bridge on the D-axis side as an example, three intermediate rotor magnetic bridges 312, 314, 316 are provided between the central rotor magnetic bridge 318 and the end rotor magnetic bridges 310 located at the end portions.

Further, for a plurality of rotor magnetic bridges located on the same side of the D-axis, the ratio of the minimum width of the middle rotor magnetic bridge closest to the D-axis to the minimum width of each of the other middle rotor magnetic bridges is not less than 5/6 and not more than 1.25. As shown in fig. 1, in the present embodiment, the minimum width of the middle rotor magnetic bridge 312 is M2, the minimum width of the middle rotor magnetic bridge 314 is M3, the minimum width of the middle rotor magnetic bridge 316 is M4, and the middle rotor magnetic bridge 316 is closest to the D axis, then M2, M3, M4 satisfy: M2/M4 is more than or equal to 0.8 and less than or equal to 1.2, and M3/M4 is more than or equal to 0.8 and less than or equal to 1.2.

Further, for a plurality of rotor magnetic bridges and a plurality of rotor magnetism isolating grooves which are positioned on the same side of the D shaft, the minimum width of the middle rotor magnetic bridge is not less than the minimum width of the rotor magnetism isolating groove which is adjacent to the middle rotor magnetic bridge and is close to the D shaft; the maximum width of the end rotor magnetic bridge is not less than the minimum width of the rotor magnetism isolating groove adjacent to the end rotor magnetic bridge; and the ratio of the minimum width of the rotor magnetism isolating groove closest to the D shaft to the minimum width of each of the rest rotor magnetism isolating grooves is not less than 2/3 and not more than 2. As shown in fig. 1, in this embodiment, the minimum width of the rotor magnetism isolating groove 311 is N1, the minimum width of the rotor magnetism isolating groove 313 is N2, the minimum width of the rotor magnetism isolating groove 315 is N3, the minimum width of the rotor magnetism isolating groove 317 is N4, and the maximum width of the rotor magnetic bridge 310 in the D axis direction is M1. N1, N2, N3 and N4 satisfy: 0.5-N1/N4-1.5, 0.5-N2/N4-1.5 and 0.5-N3/N4-1.5, and satisfies: m1 is more than or equal to N1, M2 is more than or equal to N2, M3 is more than or equal to N3 and M4 is more than or equal to N4.

Further, as shown in fig. 2, the boundary line of any rotor flux barrier groove of the rotor sheet 31 and the conductor grooves 319 on the left and right sides thereof satisfies the following relationship:

a boundary line L1 of the left conductor groove 319 far from the Q axis is collinear with a boundary line L3 of the rotor flux barrier groove on the left side of the D axis and far from the Q axis;

a boundary line L7 of the right conductor groove 319 far from the Q axis is collinear with a boundary line L5 of the rotor flux barrier groove located on the right side of the D axis and far from the Q axis;

a boundary line L2 of the left conductor groove 319 close to the Q axis is collinear with a boundary line L4 of the rotor flux barrier groove located on the left side of the D axis and close to the Q axis;

a boundary line L8 of the right conductor groove 319 close to the Q axis is collinear with a boundary line L6 of the rotor flux barrier groove located on the right side of the D axis and close to the Q axis;

an arc C1 of the rotor magnetism isolating groove far away from the Q shaft is respectively tangent to a boundary line L3 and a boundary line L5 of the rotor magnetism isolating groove;

the arc C2 of the rotor magnetism isolating groove far away from the axis Q is respectively tangent to the boundary line L4 and the boundary line L6 of the rotor magnetism isolating groove.

Further, as shown in fig. 3, an included angle δ between a boundary line L3 of any one of the rotor flux barriers of the rotor sheet 31 and the boundary line L5 is not smaller than an included angle ∈ between the boundary line L4 and the boundary line L6.

Further, the boundary line L3 of each rotor magnetism isolating groove positioned on the same side of the D shaft has the same included angle delta with the boundary line L5 or sequentially decreases in the direction away from the D shaft, and is not larger than 180 degrees. In this embodiment, as shown in fig. 4, the rotor flux barriers 317, 315, 313 and 311 are located on the same side of the D-axis and are arranged in a direction away from the D-axis, wherein,

the inner angle between the boundary line L3 of the rotor magnetism isolating groove 311 and the boundary line L5 is δ 1,

the inner angle between the boundary line L3 of the rotor magnetism isolating groove 313 and the boundary line L5 is delta 2,

the inner angle between the boundary line L3 of the rotor flux barrier groove 315 and the boundary line L5 is δ 3,

the inner angle between the boundary line L3 of the rotor flux barrier groove 315 and the boundary line L5 is δ 4,

their relationship is: delta 4 is not less than delta 3 is not less than delta 2 is not less than delta 1 is not less than 180 degrees.

Further, all the conductor slots 319 on the rotor sheet 31 have the same area. As shown in fig. 1, in the present embodiment, the 18 conductor grooves 319 corresponding to the 9 rotor flux barriers have the same area.

As shown in fig. 5, rotor magnetic bridges 310, 312, 314, 316 and 318 are all distributed along the Q-axis magnetic path, so that the Q-axis magnetic path is clear, and the Q-axis magnetic flux is at a high level; the rotor magnetic isolation grooves 311, 313, 315 and 317 are distributed perpendicular to the direction of the D-axis magnetic circuit, so that the D-axis magnetic circuit is blocked, and the D-axis magnetic flux is greatly reduced; therefore, the difference value of the magnetic fluxes of the Q shaft and the D shaft is greatly improved, and the reluctance torque is further greatly improved.

As shown in fig. 6, an embodiment of the present invention also provides an asynchronously started synchronous reluctance motor, including: stator core 1, stator winding 2, rotor core 3 as described above, rotating shaft 4, conductor 5, and injection molding material 6. Rotor core 3 sets up in stator core 1, and pivot 4 passes the pivot hole 320 on rotor core 3, and conductor piece 5 fills conductor groove 319 on rotor core 3 in proper order, and injection molding 6 fills the rotor magnetism-isolating groove on rotor core 3. The conductor 5 may be an aluminum casting. In this embodiment, since the 18 conductor grooves 319 have the same area, the amount of cast aluminum used for the conductor member 5 is the same for each conductor groove 319.

Further, the number of poles of the asynchronous starting synchronous reluctance motor is 2.

Further, the difference between the inner diameter L1 of the stator core 1 and the outer diameter L2 of the rotor core 3 of the asynchronous starting synchronous reluctance motor ranges from 0.8mm to 1.6 mm.

Further, the number of slots of the stator core 1 of the asynchronous starting synchronous reluctance motor is 12, 24 (as shown in fig. 7) or 36 (as shown in fig. 8). In the preferred embodiment of the present invention, the number of slots of the stator core 1 is 12.

According to the rotor core provided by the invention, through the optimization of the rotor core structure, the magnetic resistance conditions of a Q-axis magnetic circuit and a D-axis magnetic circuit are changed through the reasonable design of the positions and the sizes of a plurality of rotor magnetism isolating grooves and a plurality of rotor magnetic bridges, and on the other hand, the magnetic bridge width in the D-axis magnetic circuit direction is further reduced while the structural strength of the rotor is ensured through the design of filling injection molding materials in the magnetism isolating grooves, so that the D-axis magnetic resistance is further increased, the magnetic flux difference value of the Q-axis magnetic circuit and the D-axis magnetic circuit is greatly improved, the magnetic resistance torque is greatly improved, and the motor efficiency is greatly improved. The efficiency level of the permanent magnet synchronous motor is close to that of the permanent magnet synchronous motor with the same specification, and the cost of the permanent magnet synchronous motor is greatly reduced compared with that of the permanent magnet synchronous motor. In addition, because the rotor does not contain the permanent magnet, there is not demagnetization risk in hot water circulating pump high temperature application occasion to promote the motor life-span.

The asynchronous starting synchronous reluctance motor using the rotor core enables the motor to have the characteristics of an asynchronous motor and a synchronous motor at the same time, a squirrel cage rotor structure formed by a plurality of conductor groove structures realizes the asynchronous starting process, and D-axis and Q-axis unequal reluctance structures formed by a plurality of rotor magnetism isolating grooves provide reluctance torque for stable synchronous operation. When the motor operates in a steady-state synchronous mode, the rotor squirrel-cage structure does not generate current, so that extra energy consumption is avoided, and the steady-state operation efficiency of the motor is greatly improved.

In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience of describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific cases and should not be construed as limiting the present invention.

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.

The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.