TWI583103B - Reluctance motor and flux barrier structure thereof - Google Patents

Description

Reluctance motor and its magnetic barrier structure

The present invention relates to a reluctance motor and a magnetic barrier structure thereof, and more particularly to a reluctance motor applied to a synchronous reluctance motor and a magnetic barrier structure therefor.

In a conventional synchronous motor, a permanent magnet synchronous motor (PMSM) having a permanent magnet on a rotor and a field coil (FCSM) having a field coil on a rotor are known. A reluctance motor (RM) having a magnetic salient pole (RM) or the like.

Synchronous reluctance motors are one type of synchronous motors that are less expensive, more efficient, and more responsive. Wherein, the synchronous reluctance motor is provided with a stator and a rotor, and is formed by stacking a plurality of steel plates, the stator is similar to a general stator in the induction motor, and the rotor comprises a rotor core, and a plurality of flux barriers are arranged. In order to produce a difference in magnetic resistance.

However, according to the structure of the rotor of the prior art synchronous reluctance motor, the number of the flux barriers is small, or the space of the flux barriers is small, which causes the magnetic resistance of the flux barriers to be small. Further, the torque of the rotor is reduced; if the number or space of the flux barriers is increased, the structural strength of the rotor is deteriorated, and the rotor is easily deformed at a high speed.

Therefore, it is necessary to provide an improved reluctance motor and its magnetic barrier structure to solve the problems of the prior art.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a magnetic barrier structure capable of improving the structural strength of a rotor by providing a plurality of support bars in a magnetic barrier space.

Another object of the present invention is to provide a reluctance motor capable of preventing deformation of a rotor at a high speed by using a plurality of support bars in a magnetic barrier space.

In order to achieve the above object, the present invention provides a magnetic barrier structure disposed in a rotor, the magnetic barrier structure including at least one magnetic barrier space and a plurality of support bars; the magnetic barrier space is a rotor A magnetic barrier wall is defined; the support strips are interleaved with each other in the magnetic barrier space and extend from one side of the magnetic barrier wall to the other side of the magnetic barrier wall.

In an embodiment of the invention, the magnetic barrier space extends from a top surface of the rotor to a bottom surface of the rotor.

In an embodiment of the invention, the support strips have a mesh structure or a honeycomb structure.

In an embodiment of the invention, each of the support strips has a plurality of extensions, and an extension direction of the extensions is the same or different.

In one embodiment of the invention, each of the support strips has a cross-sectional width of from 1 mm to 2 mm.

In one embodiment of the invention, a spacing distance between each of the two support strips is from 1 mm to 1.5 mm.

In an embodiment of the invention, the plurality of magnetic barriers of the magnetic barrier structure are equally spaced apart within the rotor.

In order to achieve the above object, the present invention provides a reluctance motor including a stator, a rotor and a magnetic barrier structure; the rotor is rotated relative to the stator; the magnetic barrier structure is disposed in the rotor, wherein the The magnetic barrier structure includes at least one magnetic barrier space and a plurality of support bars, the magnetic barrier space being defined by a magnetic barrier wall of the rotor, the support bars being disposed in a staggered manner in the magnetic barrier space, and One side of the barrier wall extends to the other side of the barrier wall.

In an embodiment of the present invention, the magnetic barrier structure further includes a winding layer disposed on an outer peripheral wall of the rotor, the winding layer having a plurality of slots and a plurality of guide bars, and the conductive strips are correspondingly inserted In these slots.

In an embodiment of the invention, the magnetic barrier structure further comprises at least one annular groove formed on one end surface of the winding layer, and the annular groove is in communication with the slots.

As described above, the reluctance motor of the present invention is provided with a plurality of support bars in each of the magnetic barrier spaces, so that the rotor can be prevented from reducing the torque due to the large number of the magnetic barrier spaces or the large space. The structural strength of the rotor itself is strengthened, so that the rotor can be deformed at high speed.

100‧‧‧Reluctance motor

2‧‧‧stator

21‧‧‧ Stator core

22‧‧‧ slots

23‧‧‧statar coil

3‧‧‧Rotor

31‧‧‧Magnetic barrier wall

32‧‧‧ top surface

33‧‧‧ bottom

34‧‧‧ peripheral wall

4‧‧‧Magnetic Barrier Structure

41‧‧‧Magnetic Barrier Space

42‧‧‧Support bars

421‧‧‧Extension

5‧‧‧ shaft

6‧‧‧Winding layer

61‧‧‧Slots

62‧‧‧guides

7‧‧‧ Ring groove

1 is a top view of a preferred embodiment of a reluctance motor of the present invention; FIG. 2 is a perspective view of a rotor of a preferred embodiment of the reluctance motor of the present invention; and FIG. 3 is a reluctance motor of the present invention. A top view of a magnetic barrier structure of a preferred embodiment; Figure 4 is a top plan view showing another aspect of the magnetic barrier structure of a preferred embodiment of the reluctance motor of the present invention; and Figure 5 is a cross-sectional view showing the rotor of a preferred embodiment of the reluctance motor of the present invention. .

The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.

Referring to FIGS. 1 and 2, a preferred embodiment of the reluctance motor 100 of the present invention is applied to a synchronous reluctance motor, wherein the reluctance motor 100 includes a stator 2, a rotor 3, and a magnet. The barrier structure 4, a rotating shaft 5, a winding layer 6 and at least one annular groove 7. The detailed construction, assembly relationship, and operation principle of each element will be described in detail below.

Referring to FIG. 1, the stator 2 includes a stator core 21, a plurality of slots 22, and a plurality of stator coils 23, which are alternately formed along the inner diameter of the stator core 21, and the stator coils are formed. 23 corresponds to a plurality of convex portions wound between the grooves 22. The material of the stator core 21 is, for example, iron or an alloy thereof, and the material of the stator coil 23 is, for example, copper or an alloy thereof.

Referring to FIGS. 1 and 2, the rotor 3 is made by three-dimensional printing, and the rotor 3 is rotated relative to the stator core 21 of the stator 2. As shown in FIG. 2, the rotor 3 is a cylinder. And a center of the rotor 3 for the shaft 5 to pass through, the winding layer 6 being formed on the rotor 3 The outer circumference. The rotor 3, the rotating shaft 5 and the winding layer 6 are integrated and can rotate synchronously with respect to the stator 2.

Referring to FIGS. 2 and 3, the magnetic barrier structure 4 is disposed in the rotor 3, and the magnetic barrier structure 4 includes at least one magnetic barrier space 41 and a plurality of support strips 42, wherein the magnetic barrier space 41 is composed of A magnetic barrier wall 31 of the rotor 3 is defined and penetrates from a top surface 32 of the rotor 3 to a bottom surface 33 of the rotor 3. In this embodiment, as shown in Fig. 2, the rotor 3 is Forming a plurality of magnetic barrier spaces 41, each of which is formed in a circular arc line on the top surface 32 of the rotor 3, and formed in four different 90-degree angular orientations, respectively, and the magnetic barrier The plurality of magnetic barrier spaces 41 of the structure 4 are disposed equidistantly spaced within the rotor 3; further, the support strips 42 are interlaced with each other in the corresponding magnetic barrier space 41, and each of the support strips 42 is self-contained One side of the magnetic barrier wall 31 extends to the other side of the magnetic barrier wall 31. In the present embodiment, when the rotor 3 is produced by three-dimensional printing, the magnetic barrier space 41 and the support bar 42 of the magnetic barrier structure 4 are simultaneously formed. The rotor 3 itself and the support strip 42 are made of the same three-dimensional printing material, for example, comprising magnetic conductive particles and a thermoplastic polymer or all of the magnetic conductive metal particles, wherein the magnetic conductive particles are, for example, iron powder. Or an alloy powder thereof having a particle size ranging from 800 nanometers (nm) to 3 micrometers (μm); the thermoplastic polymer being, for example, an acrylonitrile-butadiene-styrene resin; the magnetically conductive particles relative to the The weight of the thermoplastic polymer is, for example, 10% by weight to 90% by weight; the three-dimensional printing technique is, for example, a fused deposition type forming or a selective laser sintering technique; the saturation magnetization amount of the rotor 3 is controlled at 25 to 275 emu/g. between.

Referring to Figures 2 and 3, it is specifically illustrated that each of the support bars 42 has a plurality of extensions 421, and the extensions 421 are interdigitated, and each of the support bars 42 has a cross-sectional width of 1 mm. Up to 2 mm, a distance between each of the two support bars 42 is from 1 mm to 1.5 Millimeter. In this embodiment, the support strips 42 have a honeycomb structure, that is, an extending direction of the extending sections 421 is different (as shown in FIG. 3); in other embodiments, the supporting strips 42 may also be in the form of a honeycomb structure. a mesh structure, that is, the extension direction of the extensions 421 is the same (as shown in FIG. 4).

Referring to FIGS. 2 and 5, the winding layer 6 is disposed on an outer peripheral wall 34 of the rotor 3. The winding layer 6 has a plurality of elongated cylindrical slots 61 and a plurality of bars 62. Wherein the present system of the winding layer 6 is made of a non-magnetically conductive but electrically conductive metal material (for example, copper or aluminum); the conductive strips 62 are made of a magnetic conductive metal material such as copper or an alloy thereof; And correspondingly inserted in the slots 61.

Referring to FIGS. 2 and 5, the ring groove 7 is formed on one end surface of the winding layer 6, that is, a recessed step around the top surface 32 of the rotor 3, and the ring groove 7 and the slots are 61 connected. In other embodiments, two ring grooves 7 may be provided, which are respectively formed on opposite end faces of the winding layer 6, that is, one ring groove 7 surrounds the top surface 32 of the rotor 3, and the other ring groove 7 surrounds the bottom surface of the rotor 3. 33.

According to the above structure, the reluctance motor 100 of the present invention is provided with a plurality of support bars 42 disposed in each of the magnetic barrier spaces 41, and each of the support bars 42 extends from one side of the magnetic barrier wall 31 to the magnetic barrier. The other side of the surrounding wall 31, and the extending sections 421 are interlaced with each other, so that a strong supporting structure of the magnetic barrier spaces 41 can be provided, so that the magnetic barrier spaces 41 can be provided in a larger number, and the opening is sufficient. The large space of the reluctance can strengthen the structural strength of the rotor 3 itself, and prevent the rotor 3 from reducing the torque due to the large number of the magnetic barrier spaces 41 or the large space, so that the rotor 3 can It does not deform when rotating at high speed. In addition, since the cross-sectional area of the support bar 42 is small, the magnetic resistance is large, and magnetic leakage and torque drop are less likely to occur.

With the above design, a plurality of support bars 42 are disposed in each of the magnetic barrier spaces 41, so that the rotor 3 can be prevented from reducing the torque due to the large number of the magnetic barrier spaces 41 or the large space, and the same is strengthened. The structural strength of the rotor 3 itself, in turn, allows the rotor 3 to be deformed at high speeds.

The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

3‧‧‧Rotor

31‧‧‧Magnetic barrier wall

34‧‧‧ peripheral wall

4‧‧‧Magnetic Barrier Structure

41‧‧‧Magnetic Barrier Space

42‧‧‧Support bars

6‧‧‧Winding layer

61‧‧‧Slots

62‧‧‧guides

7‧‧‧ Ring groove

Claims (10)

A magnetic barrier structure is disposed in a rotor, the magnetic barrier structure comprising: at least one magnetic barrier space defined by a magnetic barrier wall of the rotor; and a plurality of support bars interlaced with each other In the magnetic barrier space, and extending from one side of the magnetic barrier wall to the other side of the magnetic barrier wall. The magnetic barrier structure of claim 1, wherein the magnetic barrier space extends from a top surface of the rotor to a bottom surface of the rotor. The magnetic barrier structure of claim 1, wherein the support strips have a mesh structure or a honeycomb structure. The magnetic barrier structure of claim 1, wherein each of the support strips has a plurality of extensions, and an extension direction of the extensions is the same or different. The magnetic barrier structure of claim 1, wherein each of the support strips has a cross-sectional width of 1 mm to 2 mm. The magnetic barrier structure of claim 1, wherein a distance between each of the two support strips is from 1 mm to 1.5 mm. The magnetic barrier structure of claim 1, wherein the plurality of magnetic barriers of the magnetic barrier structure are equally spaced apart in the rotor. A reluctance motor comprising: a stator; a rotor rotating relative to the stator; and a magnetic barrier structure disposed in the rotor, the magnetic barrier structure comprising: At least one magnetic barrier space defined by a magnetic barrier wall of the rotor; and a plurality of support strips interleaved in the magnetic barrier space and from one side of the magnetic barrier wall Extending to the other side of the barrier wall. The reluctance motor of claim 8, further comprising a winding layer disposed on an outer peripheral wall of the rotor, the winding layer having a plurality of slots and a plurality of guide bars, the corresponding strips Located in the slots. The reluctance motor of claim 9, further comprising at least one annular groove formed on one end surface of the winding layer, and the annular groove is in communication with the slots.