KR101338144B1 - Linear Electric Machine Structure - Google Patents

Abstract

The present invention can reduce the volume of the magnetic flux path by applying a structure in which a winding is wound around two moving magnetic cores, thereby reducing the volume of the magnetic flux reversal electric device, reducing the unbalance of load reverse electromotive force, and applying an effective cooling structure. The present invention relates to an electric machine structure having a mover structure capable of relative motion, such as a straight line, a curved motion, or a rotational motion opposite to.

Description

Linear Electric Machine Structure

The present invention relates to a structure of an electric device, and by applying a structure in which a winding is wound around two moving magnetic cores, it is possible to shorten the magnetic flux path and to reduce the volume compared to the conventional magnetic flux reversing electric device, and to reduce the unbalance of the load back EMF and to effectively The present invention relates to a structure of an electric machine having a mover structure capable of relative movement, such as a straight line, a curved motion, or a rotational motion opposite to a stator, to which a cooling structure can be applied.

Conventional linear electric equipment is represented by a permanent magnet linear synchronous motor (Permanent Magnet Linear Synchronous Motor) and is widely used for precise position control. However, the conventional permanent magnet linear synchronous motor has a form in which permanent magnets are located in the stator. As the moving distance increases, the use of permanent magnets increases and the cost is inevitably increased. Due to the end effect, there is a disadvantage of generating pulsations of thrust and vertical forces. In addition, the application of the leakage flux of permanent magnets attached to the stator to the surroundings may limit its application in some applications. In the case of a low speed high torque direct drive rotary motor, many poles are used. In this case, it is difficult to increase the pole number for structural reasons of the conventional electric equipment, and it is also easy to apply a skew to reduce torque pulsation. It is not structured.
As related prior art documents, Korean Patent Publication No. 10-2011-0120156 (published on Nov. 3, 2011), 10-2011-0001465 (published on Jan. 6, 2011), and 10-2010-0113290 (2010.10.21) Disclosure).

Accordingly, the present invention is to solve the above problems, an object of the present invention is to take the form that the permanent magnet is attached to the moving magnetic core without using the permanent magnet in the stator to provide an electric device capable of reducing the permanent magnet material cost There is.

In addition, by applying a structure in which the winding is wound around the two moving magnetic core to shorten the magnetic flux path to reduce the overall volume to provide an electrical device that can improve the thrust per unit volume.

In addition, the structure in which the winding is wound around the two moving magnetic cores allows the flow of magnetic flux to be symmetrical in each mover, thereby reducing the load back EMF unbalance, and when applying a hinge structure that can rotate in such a mover structure, It is also possible to construct linear electric devices capable of over and curved movements, which can be applied to various application systems.

First, to summarize the features of the present invention, in accordance with an aspect of the present invention for achieving the object of the present invention, the iron core teeth of the stator in the electric machine in which the rotor or mover relative to the stator At least two movers that move in opposition to the mover, each of which has permanent magnets arranged in line at each end of the two iron core teeth of the 'n' shape, one winding for electrical phase generation Characterized in that it is wound so as to traverse the spaces between the iron core teeth of the two movers.

When a plurality of pairs of the movers equal to or greater than the number N of power sources are arranged, the separation distances between the pairs are arranged so as to be different from the phase angle τ _p / N (where τ _p corresponds to the pole spacing, which is the width of the permanent magnet).

When the stator has iron core teeth for the curved movement path of the mover, the table is coupled to the upper surface of the movers, respectively, and the tables are joined to each other with hinges through hinge coupling means formed on each table. It can assist the movement of the curve in the vertical direction or the left and right direction of the direction.

It may include a structure for cooling by installing a fluid passage in the space between the movers or the space next to both ends of the movers.

The permanent magnets are arranged with polarities of the permanent magnets so that the flow of magnetic flux between one of the movers and the stator is symmetrical with the flow of magnetic flux between the other one of the movers and the stator.

The ends of the iron core teeth of each of the movers may be spaced apart by the pole spacing, and the ends of the iron core teeth of each of the movers may be spaced by twice the pole spacing, The ends may be formed to be in close contact without being spaced apart.

The permanent magnets may be provided in a buried type, surface attached type, magnetized after attaching a magnetic material, or in the form of a consequent pole.

At least one pair of movers having the structure of the movers against the stator moves, and at least has the structure of the movers against a second stator disposed adjacent to the stator in a direction perpendicular to the direction of travel of the movement The one or more pairs of other movers move, and the protrusions of the stator core teeth and the depressions of the second stator core teeth contact with the tooth period so that they are electrically 180 degrees out of phase, and electrically 180 degrees out of phase. The polarities of the permanent magnets disposed at each end of the iron core teeth of the mover pair moving against the stator may be arranged opposite to the polarities of the corresponding permanent magnets of the mover pair moving against the corresponding second stator. have.

In addition, according to another aspect of the present invention, in an electrical apparatus in which a rotor or a mover is relatively opposed to a stator, the electrical device includes at least two movers that are opposed to iron core teeth of the stator. At each end of two 'n' shaped iron core teeth, a permanent magnet and a protruding tooth repetitive structure formed to extend and protrude from the iron core teeth are provided, and one winding for generating an electrical phase includes the two movers. It is characterized in that it is wound to cross the spaces between the iron core teeth of the.

According to the electric machine according to the present invention, since the permanent magnet is attached to the mover without using the permanent magnet in the stator, the use of the permanent magnet can be reduced to reduce the manufacturing cost, and the winding is wound around the two moving magnetic cores. By applying, we can reduce the volume and reduce the unbalance of load back EMF. In addition, it is easy to increase the number of poles of the electric device by extending the structure proposed in the present invention to the rotary electric device.

In addition, in the case of the linear or rotary electric machine proposed in the present invention, both the stator and the mover (or the rotor) can be composed of laminated iron cores, and thus it is easy to apply skew, thereby reducing the pulsation of force. Low noise / low vibration and high precision position control operation are possible.

In addition, it is possible to improve the cooling performance in accordance with the needs of the application system, including a cooling structure provided with a fluid passage in the appropriate space of the mover in configuring the mover.

1 is a perspective view for explaining an electrical apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view for describing a case in which the separation distances between the movers of FIG. 1 are pole intervals.
FIG. 3 is a cross-sectional view for describing a case in which a separation distance between the movers of FIG. 1 is twice the pole spacing.
4 is a cross-sectional view illustrating a case in which the movers of FIG. 1 are closely contacted without being spaced apart from each other.
FIG. 5 is a cross-sectional view illustrating a case where a cooling structure is applied to the structure of the electric device of FIGS. 2 to 4.
6A and 6B are views for explaining a structure in which the movers structure of FIG. 1 is configured in parallel to reduce pulsation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

1 is a perspective view for explaining an electrical apparatus according to an embodiment of the present invention.

Referring to FIG. 1, an electric machine according to an embodiment of the present invention includes a stator 10 and movers 21 and 22 that move relative to the stator 10, and the winding 30 includes the mover. It is wound to cross the space between the teeth of the fields 21, 22.

Here, as illustrated in FIG. 1, the movers 21 and 22 are linearly or curvedly opposed to the stator 10 by way of example, but the present invention is not limited thereto. The linear or curved movement of the mover or the rotating movement of the rotor) may mean a rotor that rotates therein in the case of extending the concept of the stator 10 to a cylindrical stator or the like. That is, those skilled in the art will find that the stator 10 and the movers 21 and 22 as described below can be similarly applied to the structure of the cylindrical stator of the rotary electric machine and the rotor rotating therein.

Such an electric device according to an embodiment of the present invention refers to various application devices including an electric motor requiring rotation or linear motion, such as a direct drive field, a generator, a compressor, a processor, an electric vehicle, an industrial electric device, and the like. , A counter electromotive force generated by the action between the electrical phase generation in the windings 30 wound around the movers 21, 22 and the permanent magnets disposed at each end of the iron core teeth of the movers 21, 22, The movers 21 and 22 opposed to the stator 10 may be relatively moved, such as a straight line, a curve, or a rotation.

As shown in FIG. 1, the stator 10 has iron core teeth (for example, skew application) formed in the width of the depressions and protrusions of the iron core with the pole spacing τ _p (corresponding to the pole spacing of the permanent magnets described below). Easy iron core stacked teeth), which are illustrated as iron core teeth for a linear movement path, which is exemplary only, and the stator 10 is moved up or down or left and right in the direction of movement or direction of movement of the movers 21, 22. The iron core teeth may be extended to form a curved path of movement of the core, or when the movers 21 and 22 correspond to the rotor, the iron core teeth may be extended so that the stator 10 forms a cylindrical rotation path. It may be formed.

In FIG. 1, the movers 21 and 22 illustrate only one pair, but for convenience of description, the pair of movers 21 and 22 in the electric device according to an embodiment of the present invention is the number of phases of the power source ( N) can be arranged more. For example, the number of phases of the power source (N = natural number) may be single phase, three phase, four phase, or the like, and the pair of movers 21 and 22 may be arranged in the number of phases N * of natural power source. .

As such, the electrical device according to the embodiment of the present invention includes at least two movers 21 and 22 that move relative to the iron core teeth of the stator 10, and the movers 21 and 22 each represent a ' Permanent magnets 23/24 arranged in a row may be provided at each end of two n'-shaped iron core teeth (e.g., iron core stacked teeth for easy skew application). That is, as shown in FIGS. 2 to 5, the permanent magnets 23/24 are formed at the ends of the iron core teeth of each mover 21/22 of the N pole and the S pole having a width of a predetermined gap τ _p . Permanent magnets can be arranged alternately with each other. Alternatively, although not shown in the drawing, each end of the iron core teeth of each mover 21/22 may have a repeating structure (eg, consequent pole type) of a permanent magnet and a protruding tooth. That is, in each mover 21/22, a permanent magnet is formed at the position 23 in FIG. 1, and a protruding tooth is formed so that the iron core tooth of the mover extends and protrudes at the position in FIG. 1, at least one permanent magnet. And a protruding tooth can be repeated. Conversely, it is possible to form a protruding tooth at the 23rd position and to place the permanent magnet at the 24th position. Permanent magnets 23/24 as described above may be disposed in the form of a buried, surface-attached, or magnetized after attaching the magnetic material.

As shown in FIG. 1, the windings 30 are wound so that the movers 21, 22 are joined by one winding 30, while crossing the spaces between the iron core teeth of the movers 21, 22. .

As described above, the pair of movers 21 and 22 may be arranged more than the number N of power phases, and although not shown in the drawing, when a plurality of pairs of movers 21 and 22 are arranged, The separation distance between the pairs is electrically arranged so as to have a phase angle τ _p / N difference, thereby providing AC power for the phases to the windings 30 respectively wound on the pairs of movers 21 and 22 above the number N of power sources. When applied and operated, the unbalance of load back EMF can be reduced. For example, in the three-phase case, three pairs having the above-described movers 21 and 22 may be provided, and the separation distances between the pairs may be arranged to have a τ _p / 3 difference.

Meanwhile, as shown in FIG. 1, in some cases, the upper surfaces of the movers 21 and 22 may be combined with the tables 41 and 42 for placing the objects to be transported thereon, respectively. By engaging a predetermined hinge to the hinge coupling means 51, 52 (e.g., holes) provided in the hinge, the hinges for coupling the tables 41, 42 to each other can be flexibly moved to assist the curved motion. have. As shown in FIG. 1, a predetermined hinge is coupled to a coupling means 51, 52 such as a hole formed in the vertical direction on the tables 41, 42, so that the stator 10 may move the curved movement path of the movers 21, 22. In the corresponding curved motion path extending to have iron core teeth for the curved direction, the curved motion in the y direction, that is, the vertical motion in the moving direction of the movers 21 and 22 may be smoothly performed. In addition, similarly, when the curved movement path of the stator 10 extends in the z direction, that is, in the left and right directions in the moving directions of the movers 21 and 22, the engaging means 51 and 52 (for example, holes) are different. Coupling means 51, 52 (e.g., holes) are provided at a position (e.g., front or rear position, not the top surface), and a predetermined hinge is engaged to move the left and right directions in the moving direction of the movers 21, 22. It can assist the smooth movement of the curve.

2 to 5, the permanent magnets 23 and 24 may be alternately arranged with the north pole and the south pole at predetermined pole spacing τ _p at each end of the iron core teeth of the movers 21 and 22. In particular, the flow of magnetic flux between one of the movers 21, 22 and the stator 10 when applying electricity to the windings 30, between the other one of the movers 21, 22 and the stator 10. The polarities of the permanent magnets are arranged in a symmetrical manner so as to be opposite magnetic flux flows based on the flow of the magnetic flux and the predetermined center line.

In FIG. 2, the end portions of the iron core teeth of each of the movers 21 and 22 are spaced apart from each other by a polar interval τ _p , and as shown, at each end of the iron core teeth of the movers 21 and 22. The polarities of the permanent magnets are alternately arranged, and the magnetic flux flows from the magnets in which the magnetic flux flows downward among the permanent magnets of the left tooth of the 22 mover, and the magnetic flux flows upward in the permanent magnets of the right tooth of the 22 mover. Form, and the flux of magnetic flux in the mover of 21 is symmetrical to it.

In addition, in FIG. 3, the ends of the iron core teeth of each of the movers 21 and 22 are spaced apart from each other by twice the pole spacing τ _p . As illustrated, the iron cores of the movers 21 and 22 are illustrated. The polarities of the permanent magnets are alternately arranged at each end of the teeth, and the polarities of the permanent magnets of the right tooth of the mover of 22 and the polarity of the permanent magnets of the left tooth of the mover of 21 are configured opposite to FIG. 2. Here, the flow of magnetic flux between the mover and the stator 10 in FIG. 22 is symmetrical with the flow of the magnetic flux between the 21 mover and the stator 10.

In addition, FIG. 4 shows a case where the ends of the iron core teeth of each of the movers 21 and 22 are formed to be in close contact with each other without being spaced apart, and as shown, the permanent magnets at each end of the iron core teeth of the movers 21 and 22 are shown. The polarities are alternately arranged, wherein the polarities of the permanent magnets of the right tooth of the mover of FIG. 22 and the polarities of the permanent magnets of the left tooth of the mover of 21 are constructed opposite to FIG. 2.

In addition, as shown in FIG. 4, the iron core teeth of each of the movers 21 and 22 may be manufactured in the form of assembling each of the teeth that are symmetrical to each other from the left and right of the middle 71 and assembling each other. . 1 to 3, the iron core teeth of each of the movers 21 and 22 may be dividedly manufactured and assembled as described above.

FIG. 5 is a cross-sectional view illustrating a case where a cooling structure is applied to the structure of the electric device of FIGS. 2 to 4.

As shown in FIG. 5, a structure 60 having a fluid passage 61 is installed in a space between the movers 21 and 22, so that fluid such as external air, cooling gas, water, cooling oil such as lubricating oil, and the like are fluid. By letting out or inflow through the passage 61, the cooling effect on the stator 10 or the movers 21, 22 can be enhanced. In addition, by installing a structure having a fluid passage in the space (A or B, etc.) at both ends of the movers (21, 22), the fluid such as air, cooling gas, water, lubricant, etc. from the outside through the fluid passage The cooling effect can be further enhanced by allowing the inflow and outflow around the 10 or the movers 21 and 22. Such a cooling structure can be applied in the absence of the tables 41 and 42 of FIG. 1, but can also be applied by installing the structure 60 thereon even in the presence of the tables 41 and 42.

6A and 6B illustrate a structure in which the movers structure of FIG. 1 is configured in parallel to reduce pulsation.

As shown in FIG. 6A, a second stator 80 may be further included in addition to the stator 10 as described above, and the pair of at least one mover 21 and 22 as described above may be relatively opposed to the stator 10. The pair of at least one mover (91, 92) having the above mover (21, 22) structure against the two stator (80) can be relative movement. The second stator 80 may be manufactured similarly to the stator 10 and disposed adjacent to the stator 10 in a direction perpendicular to the moving direction of the mover motion.

However, in order to reduce the pulsation in the iron core stacking direction, as shown in FIG. 6B, the iron core tooth of the stator 10 and the iron core tooth of the second stator 80 are electrically configured to be 180 degrees out of phase. The polarities of the permanent magnets of the pair of movers 21 and 22 that move in opposition to the polarity of the permanent magnets of the pair of the movers 91 and 92 that move against the corresponding second stator 80 They are arranged so that they are electrically 180 degrees out of phase.

That is, each iron core tooth is extended so that the protrusion of the iron core tooth of the stator 10 and the depression of the iron core tooth of the second stator 80 are periodically in contact with the tooth cycle. In addition, the polarizer of the permanent magnets disposed at each end of the iron core teeth of the pair of movers (21, 22) to move against the stator 10, the mover to move against the second stator 80 corresponding thereto Are arranged opposite to the polarity of the corresponding permanent magnets of the pairs (91, 92). For example, the polarities of permanent magnets of 22 movers, N-S-N-S and N-S-N-S, are reversed from the polarities of permanent magnets of 92 movers, S-N-S-N and S-N-S-N. In addition, the polarities of the permanent magnets of the 21 mover are also opposite to the polarities of the permanent magnets of the 91 mover. This can cancel the suction force between the stator and the mover and reduce the pulsation in the iron core stacking direction.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

Stator (10)
Movers (21, 22)
Winding (30)
Table (41, 42)
Hinge coupling means (51, 52)
Cooling Structure (60)
Fluid passageway (61)

Claims (11)

In an electric device in which the rotor or the mover relative movement to the stator,
And at least two movers moving against the iron core teeth of the stator, each of the movers having permanent magnets arranged in a line at each end of the two iron core teeth of the 'n' shape,
One winding for electrical phase generation is wound to cross the spaces between the iron core teeth of the two movers,
The permanent magnets are arranged with polarities of the permanent magnets so that the flow of magnetic flux between one of the movers and the stator is symmetrical with the flow of magnetic flux between the other one of the movers and the stator,
When a plurality of pairs of the movers more than the number (N) of the power source are arranged, the separation distance between the pairs is arranged so as to be different from the phase angle τ _p / N (where τ _p corresponds to the pole spacing, which is the width of the permanent magnet). Characterized by electrical equipment. delete The method of claim 1,
If the stator has iron core teeth for the curved path of movement of the mover,
The table is coupled to the upper surface of the movers, respectively, and the hinge coupling means formed on each table to combine the tables with each other by the hinge to assist the curved movement of the up and down or left and right directions of the movers device. The method of claim 1,
And a structure in which a fluid passage is installed in a space between the movers or spaces adjacent to both ends of the movers to cool the space. delete The method of claim 1,
And the ends of the iron core teeth of each of the movers are spaced apart by the gap. The method of claim 1,
And the ends of the iron core teeth of each of the movers are spaced by twice the pole spacing. The method of claim 1,
And end portions of the iron core teeth of each of the movers to be in close contact with each other without being spaced apart. The method of claim 1,
The permanent magnets, embedded, surface-attached, the magnetic material attached to the form of the magnet, or an electric device characterized in that provided in the form of a repeating structure of the permanent magnet and protruding teeth. In an electric device in which the rotor or the mover relative movement to the stator,
And at least two movers moving against the iron core teeth of the stator, each of the movers having permanent magnets arranged in a line at each end of the two iron core teeth of the 'n' shape,
One winding for electrical phase generation is wound to cross the spaces between the iron core teeth of the two movers,
At least one pair of movers having the structure of the movers against the stator moves, and at least has the structure of the movers against a second stator disposed adjacent to the stator in a direction perpendicular to the direction of travel of the movement One or more pairs of different movers,
The electrical projections of the stator core teeth and the depressions of the second stator core teeth are in contact with tooth periods so as to be 180 degrees out of phase.
The polarity of the permanent magnets disposed at each end of the iron core teeth of the pair of movers moving against the stator so that there is an electrical phase difference of 180 degrees, the polarity of the pair of movers moving against the corresponding second stator The electric device, characterized in that arranged opposite to the polarity of the permanent magnets. In an electric device in which the rotor or the mover relative movement to the stator,
And at least two movers moving against the iron core teeth of the stator, each of the movers protruding from each end of the two iron core teeth of the 'n' shape with a permanent magnet extending from the end and the iron core teeth. It has a repeating structure of the protruding teeth formed to be,
One winding for electrical phase generation is wound to cross the spaces between the iron core teeth of the two movers,
The permanent magnets are arranged with polarities of the permanent magnets so that the flow of magnetic flux between one of the movers and the stator is symmetrical with the flow of magnetic flux between the other one of the movers and the stator,
When a plurality of pairs of the movers more than the number (N) of the power source is arranged, the separation distance between each pair is arranged so as to be different from the phase angle τ _p / N (where τ _p corresponds to the pole spacing, which is the width of the permanent magnet). Characterized by electrical equipment.

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