KR102547221B1 - rotor for line start permanent magnet assisted synchronous reluctance motor, and manufacturing method for thereof - Google Patents

Abstract

The present invention is a rotor located inside the stator 20 made of a laminated structure of unit discs 10 having shaft holes 11 formed along the central axis, and a first recessed portion 111 communicating with each other with different radii. and a first embedded barrier hole 110 provided with a plurality of first barrier portions 115 and located at each side of an imaginary water line orthogonal to each other with the center of the shaft hole 11 of each unit disc 10 as a starting point; A plurality of second recessed parts 121 and second barrier parts 125 communicating with each other with different radii are provided on each other side of a virtual perpendicular perpendicular to each other with the center of the shaft hole 11 of each unit disk 10 as a starting point. a second embedded barrier hole 120 located at the site; A plurality of first conductor embeds spaced apart from the end of each first barrier part 115 in the first embedded barrier hole 110 of each unit disk 10 at a predetermined interval and formed inclined at the same angle as the first barrier part 115 hole 131; A plurality of second conductor embeds spaced apart from the end of each second barrier portion 125 of the second embedded barrier hole 120 of each unit disk 10 at a predetermined interval and formed inclined at the same angle as the second barrier portion 125 hole 135; a first permanent magnet bar 160 embedded in the first buried portion 111 of the first embedded barrier hole 110 of each of the stacked unit discs 10; a second permanent magnet bar 170 embedded in the second buried portion 121 of the second buried barrier hole 120 of each of the stacked unit discs 10; Conductor bars 180 embedded in the first and second conductor embedded holes 131 and 135 of the stacked unit disks 10, respectively; a rotor of a permanent magnet embedded type reluctance synchronous motor of a direct drive type including a rotor and its A manufacturing method is provided.

Description

Rotor of direct drive permanent magnet embedded reluctance synchronous motor and manufacturing method thereof

The present invention relates to a rotor and a method for manufacturing the same, and more specifically, to a permanent magnet bar that enables direct drive even if an inverter has a problem and generates a main torque at synchronous speed with a magnetic resistance component but is separately embedded in the rotor. A rotor of a permanent magnet embedded type reluctance synchronous motor of a direct-on-line driving method and a method of manufacturing the same, which can improve the power factor and can fully demonstrate the advantages of each of the LS PM synchronous motor, synchronous reluctance motor, and PMA synchronous reluctance motor It is about.

LS PM synchronous motor (Line Start Permanent Magnet Synchronous Motor), a type of alternating current motor, generates torque by the interaction of the secondary current generated by the voltage induced in the conductor bar of the rotor and the magnetic flux generated by the coil winding of the stator. It is driven. After the start-up, as shown in FIG. 4 , the magnetic flux of the permanent magnet 120 embedded in the rotor 110 and the magnetic flux generated from the stator are synchronized with each other and operated at the rotational magnetic field speed of the stator.

Since these LS PM synchronous motors are highly dependent on the magnetic flux of the permanent magnets embedded in the rotor, it is necessary to embed many permanent magnets in order to increase the torque of the motor. In this case, the manufacturing cost increases. Other examples of AC motors include a synchronous reluctance motor (Synchronous Reluctance Motor, or SynRM) and a PMA synchronous reluctance motor (Permanent Magnet Assisted Synchronous Reluctance Motor, or PMA SynRM).

Each of these commonly forms a plurality of magnetic flux barriers on a unit disk constituting the rotor, and is generated by the difference in magnetic resistance between the magnetic flux barrier side (q axis) and the magnetic flux barrier side direction (d axis) when the rotor is started. It is the reluctance torque that rotates the rotor. In particular, in the case of the latter in which the permanent magnet is embedded in the rotor itself, similar to FIG. 4, the inductance in the direction of the magnetic flux barrier can be reduced, thereby improving torque density and power factor.

However, unlike the LS PM synchronous motor, each of the synchronous reluctance motor and the PMA synchronous reluctance motor has a disadvantage in that the operation itself is impossible if an inverter is not provided in the motor or if an inverter installed in the motor fails. Therefore, in related industries, there is a growing demand for a motor having a low manufacturing cost while maintaining the advantages of torque density and power factor improvement by permanent magnets.

Korean Registered Patent No. 1092323

The present invention has been proposed to improve the problems of the prior art, and an object of the present invention is to enable use by connecting a power source even if the inverter of the motor fails, while maintaining the high efficiency and power factor of the permanent magnet as it is. It is an object of the present invention to provide a rotor of a synchronous motor capable of significantly lowering the manufacturing cost and a manufacturing method thereof.

In order to achieve this object, the present invention consists of a stacked structure of unit disks 10 having shaft holes 11 formed along the central axis, and is located inside the stator 20. The rotor has different radii and communicates with each other. A plurality of one embedding part 111 and the first barrier part 115 are provided and located on one side of each imaginary perpendicular line perpendicular to each other with the center of the shaft hole 11 of each unit disc 10 as the starting point. The first barrier part 115 extends while being inclined at a certain angle θ1 in a counterclockwise direction with respect to the first embedded part 111, but the inclined certain angle θ1 has a value within a range of greater than 90° and less than 180°. barrier hole 110; A plurality of second recessed parts 121 and second barrier parts 125 communicating with each other with different radii are provided on each other side of a virtual perpendicular perpendicular to each other with the center of the shaft hole 11 of each unit disk 10 as a starting point. However, the end of each second recessed part 121 is spaced apart from the end of each first recessed part 111 by a predetermined distance by Δt, and each second barrier part 125 is the second recessed part ( 121), the second buried barrier hole 120 extending and inclined at a certain angle θ2 in the clockwise direction, the inclined angle θ2 having a value within a range of greater than 90° and less than 180°; A plurality of first conductor embeds spaced apart from the end of each first barrier part 115 in the first embedded barrier hole 110 of each unit disk 10 at a predetermined interval and formed inclined at the same angle as the first barrier part 115 hole 131; A plurality of second conductor embeds spaced apart from the end of each second barrier portion 125 of the second embedded barrier hole 120 of each unit disk 10 at a predetermined interval and formed inclined at the same angle as the second barrier portion 125 hole 135; a first permanent magnet bar 160 embedded in the first buried portion 111 of the first embedded barrier hole 110 of each of the stacked unit discs 10; a second permanent magnet bar 170 embedded in the second buried portion 121 of the second buried barrier hole 120 of each of the stacked unit discs 10; Conductor bars 180 are embedded in the first and second conductor embedded holes 131 and 135 of the stacked unit disks 10, respectively, and each of the first buried portions 111 of the unit disks 10 has The first contact end 112 for fixing the embedding position of the first permanent magnet bar 160 protrudes, and the second permanent magnet bar 170 is provided in each of the second recessed parts 121 of the unit disc 10. The second close end 122 for fixing the embedding position of is protrudingly formed; as its technical characteristics.

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In addition, the first and second embedded barrier holes 110 and 120 of the unit disk 10 are located on the outermost side and spaced apart from each other at a predetermined interval to the outside of each of the first and second embedded portions 111 and 121 facing each other. A barrier hole 140 is formed at a location, and a barrier hole 140 is inclined at the same angle as the first and second barrier portions 115 and 125, respectively, at a location spaced apart from the other end and one end of the barrier hole 140 by a predetermined interval. Third and fourth conductor buried holes 151 and 155 are formed, and a conductor bar 180 may be inserted into each of the third and fourth conductor buried holes 151 and 155.

Another technical feature of the present invention is to prepare a unit disk 10 having a certain radius; A shaft hole 11 is formed at the center, and first recessed parts 111 communicate with each other with different radii at each side of a virtual waterline orthogonal to each other starting from the center of the shaft hole 11 of the unit disc 10. ) and a plurality of first embedded barrier holes 110 in which the first barrier portion 115 is provided, and each other side of a virtual water line orthogonal to each other with the center of the shaft hole 11 of the unit disc 10 as the starting point. A plurality of second buried barrier holes 120 are formed with second buried portions 121 and second barrier portions 125 communicating with each other with different radii, and each of the first buried barrier holes 110 A plurality of first conductor embedded holes 131 inclined at the same angle as the first barrier portion 115 are formed at the corner of the unit disk 10 spaced apart from the end of the first barrier portion 115 by a predetermined distance, A plurality of second conductors inclined at the same angle as the second barrier part 125 are embedded in the corner of the unit disk 10 spaced apart from the end of each second barrier part 125 by a predetermined interval in the two-embedded barrier hole 120. A hole 135 is formed, located at the outermost side of the first and second embedded barrier holes 110 and 120, respectively, and spaced apart from each other at a predetermined interval to the outer side of each of the first and second embedded portions 111 and 121 facing each other. A barrier hole 140 is formed in the barrier hole 140, and a third, inclined at the same angle as the first and second barrier parts 115 and 125, respectively, at a position spaced apart from the other end and one end of the barrier hole 140 by a predetermined distance, respectively. Processing step of each unit disk 10 to form the 4-conductor embedded holes 151 and 155; preparing upper and lower covers 40 and 30 each having the same radius as the unit disc 10; A lower shaft hole 31 corresponding to the shaft hole 11 of each unit disc 10 is formed at the center, and the first, second, third, and fourth conductors of each unit disc 10 are embedded along the corner. A lower cover 30 processing step of forming a plurality of first, second, third, and fourth lower conductor embedded holes 33, 35, 36, and 38 corresponding to the holes 131, 135, 151, and 155, respectively; An upper shaft hole 41 corresponding to the shaft hole 11 of each unit disc 10 is formed at the center, and the first, second, third, and fourth conductors of each unit disc 10 are embedded along the corner. A plurality of first, second, third, and fourth upper conductor embedded holes 43, 45, 46, and 48 respectively corresponding to the holes 131, 135, 151, and 155 are formed, respectively, and the upper shaft hole 41 and the second Between the 1, 2, 3, and 4 upper conductor embedded holes (43, 45, 46, 48), a plurality of permanent magnet embedded holes corresponding to the first and second embedded portions (111, 121) of each unit disc (10), respectively Lower cover 30 processing step of forming (42); After inserting and positioning the lower shaft hole 31 of the lower cover 30 on the support shaft, each shaft hole 11 of the processed unit disc 10 is sequentially inserted into the support shaft and stacked at a certain vertical height. inserting and placing the upper shaft hole 41 of the upper cover 40 on the upper side of the unit discs 10 stacked with; The molten conductor is injected into the first, second, third, and fourth upper conductor embedding holes 43, 45, 46, and 48 of the upper cover 40, respectively, and the first, second, filling each of the 3 and 4 conductor embedding holes (131, 135, 151, 155) with a conductor; removing the support shaft from the stacked unit discs 10; inserting a shaft into each of the shaft holes 11 of the stacked unit discs 10; A step of forcibly inserting and fixing the first and second permanent magnet bars 160 and 170 into the first and second embedded portions 111 and 121 of the stacked unit discs 10, respectively.

In the present invention, by embedding a conductor bar in the rotor, direct drive is possible even if there is an error in the inverter like the LS PM synchronous motor, and through the construction of the barrier part of the rotor, the magnetic resistance component is the main factor in synchronous speed like a synchronous reluctance motor. A rotor that can demonstrate the advantages of LS PM synchronous motor, synchronous reluctance motor, and PMA synchronous reluctance motor, respectively, by configuring the combination so that the power factor can be improved by a permanent magnet bar separately embedded in the rotor while generating torque. It is possible to provide

In addition, since the main purpose of the permanent magnet bar embedded in the rotor is to improve the power factor, the intended purpose can be sufficiently achieved even if a small number of permanent magnets are purchased, thereby significantly reducing the manufacturing cost of the motor itself. A gap of △t is placed between the embedded parts where the magnet bar is embedded to prevent cracking of the embedded part due to centrifugal force in advance, and close contact ends are formed in each embedded part to maintain stable adhesion of the permanent magnet bar in a high-speed rotation state. By configuring it so that it can guarantee stable operation for a long time.

1 is a schematic cross-sectional configuration diagram of a synchronous motor to which a rotor according to the present invention is applied.
Figure 2 is a schematic cross-sectional view of the rotor according to the present invention.
3a to 3f are schematic manufacturing steps of a rotor according to the present invention, respectively.
4 is a schematic configuration diagram of a conventional LS PM synchronous motor;

Looking at the preferred embodiment according to the present invention in detail with reference to the accompanying drawings, as follows, in detailing the embodiment of the present invention, there is no direct relationship with the technical features of the present invention, or A detailed description will be omitted for matters that are obvious to those skilled in the art.

The present invention is a rotor of a permanent magnet embedded type reluctance synchronous motor that can be driven by direct input, and the rotor has a shaft hole 11, first and second embedded barrier holes 110 and 120, and first and second conductor embedded holes (131, 135) is characterized by including the unit disc 10, the first and second permanent magnet bars 160 and 170, and the conductor bar 180, each of which is formed and stacked. Each configuration of the rotor will be examined in detail.

1, the rotor is located inside the stator 20, a plurality of slots 21 are formed on the inner surface of the stator 20, and a coil (not shown) is wound around the adjacent slots 21. A specific configuration of the stator 20 is widely known in the related art, and detailed description thereof will be omitted.

The rotor is made of a laminated structure of unit disks 10 having a certain diameter and a certain thickness as shown in FIG. 2, and a shaft hole 11 is formed on the central axis of each unit disk 10. The material of the unit disk 10 may be made of any of the materials commonly used in the related industry.

As shown in the drawing, the first embedded barrier hole 110 is located on one side of each imaginary water line orthogonal to each other starting from the center of the shaft hole 11 of each unit disk 10, and communicates with each other with different radii. A plurality of one embedded part 111 and a first barrier part 115 are provided. The first embedded portion 111 is a portion where the first permanent magnet bar 160 is embedded, and the first barrier portion 115 functions as a magnetic flux barrier.

At this time, in the first buried barrier hole 110, each of the first barrier portions 115 is inclined and extended at a predetermined angle θ1 in a counterclockwise direction with respect to each of the first buried portions 111. At this time, it is preferable that the inclined angle θ1 has a value within the range of 90°<θ1<180°. In this case, it is possible to design the difference between the d-axis inductance and the q-axis inductance and the ratio between the d-axis inductance and the q-axis inductance in the PMA synchronous reluctance motor to the maximum value. In the drawing, the case of θ1 = 140 ° is disclosed among the two.

The second embedded barrier hole 120 is located on the other side of a virtual waterline orthogonal to each other starting from the center of the shaft hole 11 of each unit disc 10, and communicates with each other with different radii. 121) and a plurality of second barrier portions 125 are provided. The second embedded portion 121 is a portion where the second permanent magnet bar 170 is embedded, and the second barrier portion 125 functions as a magnetic flux barrier.

In the second buried barrier hole 120, each second barrier portion 125 is inclined clockwise at a predetermined angle θ2 with respect to each second buried portion 121 and extends. At this time, it is preferable that the inclined angle θ2 has a value within the range of 90°<θ2<180°. The reason for extending each of the second barrier portions 125 of the second buried barrier hole 120 at a predetermined angle is the same as that of the first buried barrier hole 110 . The drawing discloses a case in which the second barrier portion 125 is inclined at an angle of θ2 = 140°, similarly to the first embedded barrier hole 110 .

At this time, each end of the first buried part 111 in the first buried barrier hole 110 is spaced apart from each end of the second buried part 121 in the second buried barrier hole 120 by a predetermined distance by Δt. There is a characteristic of being That is, there is a configuration in which the first and second embedded portions 111 and 121 are connected to each other to embed different permanent magnet bars by separating the first and second embedded portions 111 and 121 without embedding a single permanent magnet bar. That's it.

The reason why the present invention places a gap of Δt between the embedded parts where the permanent magnet bar is embedded is that the embedded part is a space of a certain size and corresponds to a weak part in the structure of the rotor. Due to the centrifugal force, cracks are likely to occur starting from the left and right ends of the embedding part, resulting in splitting. To this end, the present invention can ensure stable operation for a long time by preventing cracks in the embedding portion due to centrifugal force in advance by dividing the space of the embedding portion and leaving an interval of Δt therebetween.

On the other hand, the present invention does not exclude the case where the first and second contact ends 112 and 122 are protruded from the first and second embedded portions 111 and 121 of the unit disc 10, as shown in FIG. 2 . . When the first and second contact ends 112 and 122 protrude from the first and second embedded portions 111 and 121, respectively, as shown in FIG. 1, the first and second permanent magnet bars 160 and 170 are very stable for a long time. The embedding state can be maintained, and a phenomenon in which each space of the first and second embedded parts 111 and 121 is damaged by the first and second permanent magnet bars 160 and 170 can be fundamentally prevented.

The first conductor embedding hole 131 is composed of a plurality of pieces formed spaced apart from the end of each first barrier portion 115 at a predetermined interval of the first embedding barrier hole 110 of each unit disc 10, and the second conductor embedding hole 131 is formed. A plurality of holes 135 are formed to be spaced apart from the end of each second barrier portion 125 of the second embedded barrier hole 120 of each unit disc 10 by a predetermined interval.

At this time, each of the first conductor embedded holes 131 is formed inclined at the same angle as the first barrier portion 115, and each of the second conductor embedded holes 135 is formed inclined at the same angle as the second barrier portion 125. There is a characteristic of being The reason why the present invention forms the first and second conductor embedded holes 131 and 135 at the same angle as the first and second barrier portions 115 and 125, respectively, is that the distance between the buried barrier holes and the conductor embedded holes are reduced. This is to keep the flowing magnetic flux uniform.

In addition, as can be seen in Figure 1, the present invention, unlike the conventional LS PM synchronous motor, the slot 21 formed in the stator 20 and the first and second conductor embedded holes 131 and 135 formed in the rotor, respectively It consists of a configuration that is not opposed to each other and is offset by a certain angle, which is to induce direct start-up like an induction machine even if the inverter provided in the motor fails.

The first permanent magnet bar 160 is embedded in the first recessed portion 111 of the first buried barrier hole 110 of each of the stacked unit discs 10, and the second permanent magnet bar 170 is a stacked unit. The disc 10 is embedded in the second recessed portion 121 of each second buried barrier hole 120 . And, the conductor bar 180 is embedded in the first and second conductor embedment holes 131 and 135 of each of the stacked unit disks 10 . Conductor bar 180 may be made of any one of materials widely used in the related industry, such as aluminum or copper.

As such, the present invention is similar to the LS PM synchronous motor in that it is possible to start by direct power supply by embedding the conductor bar 180 in the first and second conductor embedding holes 131 and 135 of the rotor, but the synchronous speed The main factor generating torque in is not the magnetic component of the permanent magnet like the LS PM synchronous motor, but the reluctance component due to the configuration of the first and second barrier parts 115 and 125 formed in the rotor. There are similarities with synchronous reluctance motors in

In addition, the present invention has a configuration in which the first and second permanent magnet bars 160 and 170 are embedded in the first and second embedded portions 111 and 121 of the first and second embedded barrier holes 110 and 120 of the rotor, respectively. However, in the present invention, the main purpose of the first and second permanent magnet bars 160 and 170 is to improve the power factor, and the torque acts as a secondary function. It is different from the PMA synchronous reluctance motor generated by magnets, and even if a smaller permanent magnet is embedded, the intended purpose can be sufficiently achieved.

On the other hand, the present invention does not exclude the case where the barrier hole 140 and the third and fourth conductor buried holes 151 and 155 are formed, respectively, as shown in FIG. The barrier hole 140 is located on the outermost side of the first and second embedded barrier holes 110 and 120 of the unit disc 10, respectively, and is constant to the outside of the first and second embedded portions 111 and 121 facing each other. It may be formed at positions spaced apart from each other.

In this way, when the barrier holes 140 are formed in each of the unit discs 10 separately from the first and second embedded barrier holes 110 and 120 in which the first and second permanent magnet bars 160 and 170 are embedded, synchronization Similar to the case of reluctance motors, the advantage of generating additional reluctance torque can be expected.

Each of the third and fourth conductor embedding holes 151 and 155 is spaced apart from the other end and one end of each barrier hole 140 at a predetermined interval, and has the same angle as the first and second barrier portions 115 and 125, respectively. It is formed by inclining to Conductor bars 180 are inserted into the third and fourth conductor embedding holes 151 and 155, respectively.

Next, a schematic manufacturing method of the rotor according to the present invention will be described with reference to each of the accompanying FIGS. 3A to 3F. Since the specific configuration of the unit disk 10 constituting the rotor and the configuration of each of the first and second permanent magnet bars 160 and 170 and the conductor bar 180 have been described above, the following is a description of the manufacturing method of the rotor. limited to what is needed.

First, a unit disc 10 is prepared and processed. As the name implies, the unit disc 10 is preferably formed in a shape having a predetermined radius. When the unit disks 10 are prepared, each of the prepared unit disks 10 is processed. The processing may be performed by cutting using a press, and the preparation and processing of the unit disc 10 may be performed simultaneously.

As shown in FIG. 3A, the processing of each unit disk 10 includes the shaft hole 11, the first and second embedded barrier holes 110 and 120, the first and second conductor embedded holes 131 and 135, and the barrier This is the operation of forming the hole 140 and the third and fourth conductor embedded holes 151 and 155, respectively. The specific shape and formation position of each of these is the same as described above.

Next, the upper and lower covers 40 and 30 are prepared and processed. Each of the upper and lower covers 40 and 30 may be configured to have the same radius as the unit disc 10, and processing may be performed by cutting using a press. In addition, similar to the unit disk 10, the preparation and processing of the upper and lower covers 40 and 30 may also be performed simultaneously. The upper and lower covers 40 and 30 are preferably made of a non-magnetic material such as SUS.

The processing of the lower cover 30 is an operation of forming the lower shaft hole 31 and the first, second, 3, and fourth lower conductor embedded holes 33, 35, 36, and 38, respectively, as shown in FIG. 3B, and the upper cover ( 40) is an operation of forming the upper shaft hole 41, the first, second, third, and fourth upper conductor embedded holes 43, 45, 46, and 48, and the permanent magnet embedded hole 42, respectively, as shown in FIG. 3C. am.

Each of the lower and upper shaft holes 31 and 41 corresponds to the shaft hole 11 of the unit disk 10, and the first, second, third, and fourth lower conductor embedded holes 33, 35, 36, and 38 and 1, 2, 3, 4 upper conductor embedded holes (43, 45, 46, 48) are respectively in the first, 2, 3, 4 conductor embedded holes (131, 135, 151, 155) of the unit disc (10), respectively. Correspondingly, the permanent magnet embedded hole 42 corresponds to the first and second embedded portions 111 and 121 of the unit disc 10, respectively.

When the upper and lower covers 40 and 30 are prepared, the lower cover 30, the plurality of unit disks 10, and the upper cover 40 are sequentially inserted into the not shown support shaft as shown in FIG. 3D. In order to prevent the upper and lower covers 40 and 30 and the unit disk 10 from swinging left and right in the molten conductor injection step to be described later, support shafts are provided in the shaft holes 11 and the lower and upper shaft holes 31 and 41, respectively. It is preferable to insert it in a tight state. In FIG. 3D, reference numeral 20' denotes a stacked unit disc.

When the lower cover 30, the plurality of unit disks 10, and the upper cover 40 are sequentially inserted into the support shaft, resistance rings on both the left and right sides in the same form as the mold of a general induction rotor (not shown), It is placed inside the die-casting mold containing the internal cooling fan and balancing pins. Since this die-casting mold structure is widely known in relation to rotor manufacturing, a detailed description thereof will be omitted.

In this state, as shown in FIG. 3E, the molten conductor is injected through the first, second, third, and fourth upper conductor embedding holes 43, 45, 46, and 48 of the upper cover 40, respectively, and the unit discs are stacked. Conductors are filled in each of the first, second, third, and fourth conductor embedding holes 131, 135, 151, and 155 of (10). As described above, the injected conductor may be made of aluminum or copper.

When the conductors filled in each of the first, second, third, and fourth conductor embedding holes 131, 135, 151, and 155 of the stacked unit discs 10 are cured, they are separated from the die-casting mold and then the support shaft is removed. When the support shaft is removed, the stacked unit discs 10 are injected through the first, second, third, and fourth conductor embedding holes 131, 135, 151, and 155, respectively, and then integrated by the hardened conductor bar 180. form a structure

In addition, according to the inner shape of the die-casting mold, a ring-shaped conductor resistance ring having a certain thickness is formed on the outer portion of each of the upper and lower covers 40 and 30, and an internal cooling fan and a balancing pin are formed on the upper portion of the conductor resistance ring. is formed

Next, as shown in FIG. 3F, the shaft 50 is inserted into the shaft hole 11 of each of the stacked unit disks 10 forming an integrated structure by the conductor bar 180 and fixed. Shaft 50 forms the axis of rotation of the rotor.

When the shaft is inserted into and fixed to the central axis of the stacked unit discs 10, the first and second permanent magnets are placed in the first and second embedded portions 111 and 121 of the stacked unit discs 10, respectively, as shown in FIG. 3F. Each of the bars 160 and 170 is forcibly inserted and fixed. Then, when the respective ends of the first and second permanent magnet bars 160 and 170 exposed through the upper and lower unit discs 10 are molded with an epoxy molding liquid, manufacturing of the rotor according to the present invention is completed.

In the above, the description has been limited to the preferred embodiments of the present invention, but this is only an example, and the present invention is not limited thereto and can be modified and implemented in various ways, and furthermore, separate technical features are provided based on the disclosed technical idea. It will be obvious that it can be added and implemented.

10: rotor 11: shaft hole
20: stator 21: slot
30: lower cover 40: upper cover
50: shaft 110, 120: first and second sheet barrier hole
111, 121: first and second embedded parts 112, 122: first and second contact ends
115, 125: first and second barrier parts 131, 135: first and second conductor embedded holes
140: barrier hole 151, 155: third, fourth conductor embedding hole
160, 170: first and second permanent magnet bars 180: conductor bar

Claims (4)

As a rotor located inside the stator 20 made of a laminated structure of unit disks 10 having shaft holes 11 formed along the central axis,
A plurality of first recessed parts 111 and first barrier parts 115 communicating with each other with different radii are provided on each side of a virtual water line orthogonal to each other with the center of the shaft hole 11 of each unit disk 10 as a starting point. , each first barrier portion 115 is inclined and extended at a certain angle θ1 in a counterclockwise direction with respect to the first recessed portion 111, but the inclined angle θ1 is greater than 90 ° and less than 180 ° a first buried barrier hole 110 having a value within a range;
A plurality of second recessed parts 121 and second barrier parts 125 communicating with each other with different radii are provided on each other side of a virtual perpendicular perpendicular to each other with the center of the shaft hole 11 of each unit disk 10 as a starting point. However, the end of each second recessed part 121 is spaced apart from the end of each first recessed part 111 by a predetermined distance by Δt, and each second barrier part 125 is the second recessed part ( 121), the second buried barrier hole 120 extending and inclined at a certain angle θ2 in the clockwise direction, the inclined angle θ2 having a value within a range of greater than 90° and less than 180°;
A plurality of first conductor embeds spaced apart from the end of each first barrier part 115 in the first embedded barrier hole 110 of each unit disk 10 at a predetermined interval and formed inclined at the same angle as the first barrier part 115 hole 131;
A plurality of second conductor embeds spaced apart from the end of each second barrier portion 125 of the second embedded barrier hole 120 of each unit disk 10 at a predetermined interval and formed inclined at the same angle as the second barrier portion 125 hole 135;
a first permanent magnet bar 160 embedded in the first buried portion 111 of the first embedded barrier hole 110 of each of the stacked unit discs 10;
a second permanent magnet bar 170 embedded in the second buried portion 121 of the second buried barrier hole 120 of each of the stacked unit discs 10;
Conductor bars 180 embedded in the first and second conductor embedment holes 131 and 135 of each of the stacked unit disks 10;
A first contact end 112 for fixing the embedding position of the first permanent magnet bar 160 is protruded from each of the first embedded portions 111 of the unit disk 10, and A second contact end 122 for fixing the embedding position of the second permanent magnet bar 170 protrudes from each of the two embedded parts 121; The rotor of the permanent magnet embedded reluctance synchronous motor of the direct drive type, characterized in that. delete According to claim 1,
Located on the outermost side of each of the first and second embedded barrier holes 110 and 120 of the unit disk 10 and spaced apart from each other at a predetermined interval to the outside of each of the first and second embedded portions 111 and 121 facing each other, A barrier hole 140 is formed, and a third portion inclined at the same angle as the first and second barrier portions 115 and 125, respectively, at a position spaced apart from the other end and one end of the barrier hole 140 by a predetermined distance, respectively. , 4 conductor embedded holes 151 and 155 are formed, and a direct drive type permanent magnet embedded type magnet characterized in that a conductor bar 180 is inserted into each of the third and fourth conductor embedded holes 151 and 155 The rotor of a resistance synchronous motor. Preparing a unit disk 10 having a certain radius;
A shaft hole 11 is formed at the center, and first recessed parts 111 communicate with each other with different radii at each side of a virtual waterline orthogonal to each other starting from the center of the shaft hole 11 of the unit disc 10. ) and a plurality of first embedded barrier holes 110 in which the first barrier portion 115 is provided, and each other side of a virtual water line orthogonal to each other with the center of the shaft hole 11 of the unit disc 10 as the starting point. A plurality of second buried barrier holes 120 are formed with second buried portions 121 and second barrier portions 125 communicating with each other with different radii, and each of the first buried barrier holes 110 A plurality of first conductor embedded holes 131 inclined at the same angle as the first barrier portion 115 are formed at the corner of the unit disk 10 spaced apart from the end of the first barrier portion 115 by a predetermined distance, A plurality of second conductors inclined at the same angle as the second barrier part 125 are embedded in the corner of the unit disk 10 spaced apart from the end of each second barrier part 125 by a predetermined interval in the two-embedded barrier hole 120. A hole 135 is formed, located at the outermost side of the first and second embedded barrier holes 110 and 120, respectively, and spaced apart from each other at a predetermined interval to the outer side of each of the first and second embedded portions 111 and 121 facing each other. A barrier hole 140 is formed in the barrier hole 140, and a third, inclined at the same angle as the first and second barrier parts 115 and 125, respectively, at a position spaced apart from the other end and one end of the barrier hole 140 by a predetermined distance, respectively. Processing step of each unit disk 10 to form the 4-conductor embedded holes 151 and 155;
preparing upper and lower covers 40 and 30 each having the same radius as the unit disc 10;
A lower shaft hole 31 corresponding to the shaft hole 11 of each unit disc 10 is formed at the center, and the first, second, third, and fourth conductors of each unit disc 10 are embedded along the corner. A lower cover 30 processing step of forming a plurality of first, second, third, and fourth lower conductor embedded holes 33, 35, 36, and 38 corresponding to the holes 131, 135, 151, and 155, respectively;
An upper shaft hole 41 corresponding to the shaft hole 11 of each unit disc 10 is formed at the center, and the first, second, third, and fourth conductors of each unit disc 10 are embedded along the corner. A plurality of first, second, third, and fourth upper conductor embedded holes 43, 45, 46, and 48 corresponding to the holes 131, 135, 151, and 155, respectively, are formed, and the upper shaft hole 41 and the second Between the 1, 2, 3, and 4 upper conductor embedded holes (43, 45, 46, 48), a plurality of permanent magnet embedded holes corresponding to the first and second embedded portions (111, 121) of each unit disc (10), respectively Lower cover 30 processing step of forming (42);
After inserting and positioning the lower shaft hole 31 of the lower cover 30 into the support shaft, each shaft hole 11 of the machined unit disc 10 is sequentially inserted into the support shaft and stacked at a certain vertical height. inserting and placing the upper shaft hole 41 of the upper cover 40 on the upper side of the unit discs 10 stacked with;
The molten conductor is injected into the first, second, third, and fourth upper conductor embedding holes 43, 45, 46, and 48 of the upper cover 40, respectively, and the first, second, filling each of the 3 and 4 conductor embedding holes (131, 135, 151, 155) with a conductor;
removing the support shaft from the stacked unit discs 10;
inserting a shaft into each of the shaft holes 11 of the stacked unit discs 10;
Forcibly inserting and fixing the first and second permanent magnet bars 160 and 170 into the first and second embedded portions 111 and 121 of the stacked unit discs 10, respectively;
A method of manufacturing a rotor of a permanent magnet embedded type reluctance synchronous motor of a direct drive method comprising:

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