JP2014042441A - Switched reluctance motor assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switched reluctance motor assembly which simplifies the product structure thereby realizing productivity improvement and a more stable support structure of a bearing part and improves the product operation performance and the reliability.SOLUTION: A switched reluctance motor assembly of this invention includes: a rotation shaft 10 forming a rotation center of a motor; a rotor part 20 which is rotatably coupled to the rotation shaft 10; a first stopper 41 which is coupled to an axial upper part of the rotor part 20 and supports the rotor part 20; a second stopper 42 which is coupled to an axial lower part of the rotor part 20 and supports the rotor part 20; a first bearing part 71 which is coupled to an axial upper part of the first stopper 41; a second bearing part 72 which is coupled to an axial lower part of the second stopper 42; a diffuser part 60 which supports the first bearing part 71 and is coupled to an upper end of the first stopper 41; and a motor housing 80 which is integrally formed with the diffuser part 60 and houses the first bearing part 71 and the second bearing part 72.

Description

  The present invention relates to a switched reluctance motor assembly.

  Normally, a switched reluctance motor (SRM) called an SR motor has a magnetic structure in which both a stator and a rotor are salient poles, and a concentrated winding is formed on the stator. Since the coil is wound and the rotor is composed of only an iron core without any excitation device (winding or permanent magnet), the motor is excellent in cost competitiveness.

  Specifically, a switched reluctance motor (SRM) is a device that rotates a rotor using reluctance torque due to a change in magnetic resistance, and is low in manufacturing cost and requires little maintenance. Advantages are high reliability and almost permanent life. A switched reluctance motor has a stator portion that is a stator including a stator yoke and a plurality of stator salient poles protruding from the stator yoke, a rotor core, and a stator salient pole. And a rotor portion that is a rotor that is rotatably accommodated in the stator portion.

  Such a switched reluctance motor (SRM; Switched Reluctance Motor) is applied in various fields such as a vacuum cleaner. However, there is a problem that vibration or noise generated when driving a switched reluctance motor (SRM; Switched Reluctance Motor) mounted on a vacuum cleaner module deteriorates the operation performance of the product. In addition, since it is difficult to ensure the concentricity of both bearing parts due to a decrease in the coupling force of the bearing parts coupled to the upper and lower parts of the rotating shaft, vibration and noise are generated by the bearing parts during the operation of the motor, which causes the entire motor including the motor to move. There was a problem that the life of the product was shortened.

  The present invention has been derived to solve the above-described problems of the prior art, and an object of the present invention is to integrally form a diffuser and a housing of a vacuum cleaner module including a switched reluctance motor. Accordingly, it is an object of the present invention to provide a switched reluctance motor assembly for improving productivity by improving the productivity and reliability of the product by improving the productivity by simplifying the product structure and realizing a more stable support structure of the bearing.

  A switched reluctance motor assembly according to an embodiment of the present invention includes a rotation shaft that forms a rotation center of a motor, a rotor portion that is rotatably coupled to the rotation shaft, and an axially upper portion of the rotor portion. A first stopper that supports the rotor portion; a second stopper that is coupled to an axially lower portion of the rotor portion and supports the rotor portion; and a first bearing portion that is coupled to an axially upper portion of the first stopper. A second bearing portion coupled to an axially lower portion of the second stopper, a diffuser portion supporting the first bearing portion and coupled to an upper end of the first stopper, and integrally formed on the diffuser portion. And a motor housing that houses the first bearing portion and the second bearing portion therein.

  In the switched reluctance motor assembly according to an embodiment of the present invention, the rotor part may include an annular rotor core and a plurality of rotor poles protruding outward from the rotor core.

  In the switched reluctance motor assembly according to an embodiment of the present invention, the first stopper may be formed on a balance member for maintaining a rotational balance of the switched reluctance motor.

  In a switched reluctance motor assembly according to an embodiment of the present invention, a stator yoke that accommodates the rotor portion is formed to be spaced apart so as to correspond to the rotor pole, and is formed to protrude inward of the stator yoke. And a stator portion including a stator salient pole.

  The switched reluctance motor assembly according to an embodiment of the present invention may further include an impeller portion that is coupled to an upper portion in the axial direction of the diffuser portion and is rotatably coupled to the rotation shaft.

  In the switched reluctance motor assembly according to an embodiment of the present invention, the diffuser portion may include at least one connecting member integrally coupled to the motor housing.

  In the switched reluctance motor assembly according to an embodiment of the present invention, the connecting member may be formed along an outer periphery of the diffuser portion, project from the outer peripheral surface of the diffuser portion, and be integrally coupled to the motor housing. it can.

  In the switched reluctance motor assembly according to an embodiment of the present invention, a sensing magnet formed at a lower portion in the axial direction of the second bearing portion and corresponding to the rotor portion, and disposed at a lower portion in the axial direction of the sensing magnet. It may further include a printed circuit board having a hall sensor attached to face the magnet.

  According to the present invention, by manufacturing and forming the diffuser portion of the switched reluctance motor assembly integrally with the motor housing, not only can the reliability of motor manufacture be improved, but also the productivity can be improved.

  In addition, the diffuser part of the switched reluctance motor assembly is integrally coupled to the motor housing, so that another member for fixing the diffuser part is omitted, and vibration caused by the motor and noise caused thereby are reduced. There is an effect that can be made.

  Further, since the diffuser portion of the switched reluctance motor assembly is integrally coupled to the motor housing, a coupling process using another screw for assembling the diffuser portion and the bearing portion can be omitted, and the upper bearing And the concentricity of the lower bearing portion can be more easily ensured.

  Further, since the concentricity of the bearing portion can be easily ensured, there is an effect that the vibration and noise of the bearing portion that can be generated by driving the motor can be reduced.

  Further, by ensuring the concentricity of the bearing portion, it is possible to reduce the generation of vibration and noise of the bearing portion, thereby ensuring the operational performance and drive reliability of the product driven by the motor.

  Further, by integrating the diffuser part of the switched reluctance motor assembly and the motor housing, the bearing part can be fixed and the support structure can be formed more stably, and the applied product itself can operate stably. Thus, it is possible to prevent product failure and operation error and extend the life of the product.

1 is a cross-sectional view of a switched reluctance motor assembly according to an embodiment of the present invention. It is a fragmentary perspective view of the integral structure of the diffuser part and motor housing by one Example of this invention. FIG. 3 is a cut perspective view of an integral structure of a diffuser portion and a motor housing according to FIG. 2. 2 is a schematic cross-sectional view of a rotor portion and a stator portion according to the present invention. FIG.

  Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings. In this specification, when adding reference numerals to the components of each drawing, it is noted that the same components are given the same number as much as possible even if they are shown in different drawings. There must be. The terms “one side”, “other side”, “first”, “second” and the like are used to distinguish one component from another component, and the component is the term It is not limited by. Hereinafter, in describing the present invention, detailed descriptions of known techniques that may obscure the subject matter of the present invention are omitted.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1 is a cross-sectional view of a switched reluctance motor assembly according to an embodiment of the present invention, and FIG. 2 is a partial perspective view of an integral structure of a diffuser portion and a motor housing according to an embodiment of the present invention. FIG. 4 is a cut perspective view of an integral structure of a diffuser part and a motor housing according to FIG. 2, and FIG. 4 is a schematic sectional view of a rotor part and a stator part according to the present invention.

  A switched reluctance motor assembly according to an embodiment of the present invention includes a rotating shaft 10 that forms a rotation center of a motor, a rotor unit 20 that is rotatably coupled to the rotating shaft 10, and an upper axial portion of the rotor unit 20. And a first stopper 41 that supports the rotor portion 20, a second stopper 42 that is coupled to the lower portion in the axial direction of the rotor portion 20 and supports the rotor portion 20, and an axial direction of the first stopper 41. A first bearing part 71 coupled to the upper part, a second bearing part 72 coupled to the lower part in the axial direction of the second stopper 42, and the first bearing part 71 are supported, and the upper end of the first stopper 41 is supported. A diffuser part 60 to be coupled; and a motor housing 80 that is integrally formed with the diffuser part 60 and accommodates the first bearing part 71 and the second bearing part 72 therein. It is.

  The present invention realizes an integrated structure of the diffuser part 60 and the motor housing 80, thereby omitting another part for the bearing part support structure and improving the accuracy of the concentricity of the upper bearing part and the lower bearing part. Can do. In addition, it is possible to prevent the concentric portion of the bearing portion from being distorted due to assembly tolerances that may occur when assembling such a bearing portion, and to further improve the driving reliability and operating performance of the switched reluctance motor assembly. Details of each configuration of the switched reluctance motor assembly and an integrated structure of the diffuser portion 60 and the motor housing 80 will be described later.

  The rotating shaft 10 forms the rotation center of the motor and is formed to extend in the axial direction. In particular, the axial direction in the present invention is based on the direction in which the rotary shaft 10 is formed, and the upper direction and the lower direction are specified around the rotary shaft 10 shown in FIG. A rotor unit 20 (to be described later) is coupled to a rotary shaft 10 that forms the rotation center of the motor.

  The rotor part 20 may be formed to include an annular rotor core 21 and a plurality of rotor poles 22 protruding outward from the rotor core 21. The rotor core 21 has a hollow hole at the center, and the rotary shaft 10 is fixedly coupled to the hollow hole, and transmits the rotation of the rotor part 20 to the outside. A plurality of rotor poles 22 are preferably provided so as to protrude outward along the outer peripheral surface of the rotor core 21 and are formed so as to correspond to stator salient poles 32 described later.

  The first stopper 41 is coupled to the upper portion in the axial direction of the rotor unit 20 and functions to support the rotor unit 20. The first stopper 41 supports the rotor unit 20 and is coupled to the rotating shaft 10 to rotate together with the rotor unit 20. The first stopper 41 not only supports the rotor portion 20 in the axial direction, but can also be formed as a balance member that can adjust the rotation balance during motor rotation by being made of a resin such as plastic. . When used as a balance member, the rotational balance of the motor can be balanced by detecting the position where the rotational unbalance occurs when the motor is rotated and performing a cutting process. The balance member can be integrally formed with the rotor unit 20 by processing or injecting plastic or the like.

  The second stopper 42 is coupled to the lower part in the axial direction of the rotor part 20 and functions to support the rotor part 20. The second stopper 42 has a configuration similar to that of the first stopper 41, and the material and manufacturing method thereof are as described for the first stopper 41. Needless to say, the second stopper 42 may also be formed of a plastic material and used as a balance member in order to maintain the balance due to the rotation of the rotor portion 20. Although not shown in the drawings, a sensing groove is also formed on the lower end surface of the second stopper 42 in the axial direction, and a sensor portion is formed at a position corresponding to the sensing groove on the lower end surface of the second stopper 42, so that the rotor It can be said that it is obvious to those skilled in the art to change the design so that the rotational position of the unit 20 can be detected. However, in the present invention, as shown in FIG. 1, the position of the rotor unit 20 can be detected by using a sensing sensor 91 and a Hall sensor 93 attached to the printed circuit board 92. The Hall sensor 93 is an element whose voltage changes depending on the strength of the magnetic field, and when a magnetic field is formed perpendicular to the direction of the current flowing through the conductor, the potential difference in the direction perpendicular to the current in the conductor through which the current flows. This is a phenomenon that utilizes the phenomenon (Hall effect). Therefore, the sensing magnet 91 is formed so that the N pole and the S pole intersect, and rotates together with the rotation of the rotor section 20 provided on the rotation shaft, and detects the magnetic field of the N pole and the S pole to detect the rotor section. The number of rotations can be detected by sensing 20 positions. In addition, the details of the sensing method of the rotor unit 20 via the sensing magnet 91 and the hall sensor 93 are the same as the sensing method using the hall sensor that detects the magnetic field of a normal magnet, and thus the details are omitted.

  The first bearing portion 71 has a configuration for rotating the rotor portion 20 while supporting the axial weight of the rotating shaft 10 including the rotating rotor portion 20 and the load applied to the rotating shaft 10. The first bearing portion 71 is coupled to the upper portion of the first stopper 41 in the axial direction and is formed so as to be accommodated in a motor housing described later. In particular, in the present invention, the first bearing portion 71 can be supported and fixed by an integral structure of a diffuser portion 60 and a motor housing 80, which will be described later, and distortion due to assembly tolerance caused by the assembly of the first bearing portion 71 is prevented. And there exists an advantage which can improve the precision of the assembly concentricity with the 2nd bearing part 72 arrange | positioned at the lower part.

  The second bearing portion 72 is coupled to the lower portion of the second stopper 42 in the axial direction. The second bearing portion 72 is also coupled with the first bearing portion 71 so as to be located inside the motor housing 80. Since the description with respect to a specific function and effect | action overlaps with the 1st bearing part 71, it abbreviate | omits. As described above, since the first bearing portion 71 is supported from the integral structure of the diffuser portion 60 and the motor housing 80, the concentricity with the second bearing portion 72 can be easily ensured.

  The diffuser portion 60 can be integrally formed with the motor housing 80 that encloses the outside of the motor assembly. Here, the diffuser part 60 is formed integrally with the motor housing 80, which means that when the diffuser part 60 is manufactured, it is formed integrally with the motor housing 80 by a single mold or by another member. It means that the motor housing 80 is coupled and supported. As shown in FIGS. 2 and 3, another connecting member 63 may be formed on the outer peripheral surface of the diffuser portion 60 so as to be integrally coupled with the motor housing 80, and such a connecting member may be formed. 63, the motor housing 80, and the diffuser part 60 can be integrally formed by a single mold. Since the diffuser part 60 is formed integrally with the motor housing 80, another member for fixing the conventional diffuser part 60 is not required, and the first bearing part 71 is formed by the integral structure of the diffuser part 60 and the motor housing 80. There is an advantage that it can also be realized to be fixedly supported. Therefore, there is an advantage that the first bearing portion 71 can be prevented from being distorted and the first bearing portion 71 can be operated more stably.

  On the other hand, in the diffuser unit 60, the pressure of air sucked by the impeller unit 50, which will be described later, rises in the diffuser 61 of the diffuser unit 60, and the air thus increased in pressure is the inner circumference of the motor housing 80 that covers the upper part. The air is supplied to the lower return channel 62 side through a space formed between the surface and the outer peripheral surface of the diffuser portion 60, and the air thus supplied is guided to the central portion by the return channel 62, and is supplied to the motor. By blowing out from the side, the motor is cooled and air is discharged.

  The impeller unit 50 is coupled to the upper part of the diffuser unit 60 in the axial direction and is coupled to the rotary shaft 10. Since the impeller unit 50 is coupled to the rotary shaft 10, the impeller unit 50 rotates together with the motor and sucks external air. In particular, FIG. 1 illustrates an example of a vacuum cleaner module including a switched reluctance motor assembly. Here, the impeller unit 50 rotates in order to allow air to flow in from the outside when the cleaner is operated.

  As shown in FIG. 4, the stator portion 30 is formed including a stator yoke 31 and a stator salient pole 32. The stator yoke 31 is formed with a hollow hole for accommodating the rotor portion 20, protrudes from the inner surface of the stator yoke 31, and a plurality of stator salient poles 32 are formed so as to correspond to the rotor pole 22 of the rotor portion 20. Can be done. A current is applied to the stator salient pole 32 of the stator yoke 31, and a magnetic flux path (flux path) is formed via the rotor pole 22 of the rotor part 20 facing the stator salient pole 32, thereby rotating the rotor part 20.

  The motor housing 80 is formed to be separated outward so as to enclose the rotor part 20, the stopper, the first bearing part 71, and the second bearing part 72. The motor housing 80 structurally protects the components housed in the motor housing 80 including the rotor portion 20 and the stator portion 30 and prevents other foreign matters from flowing into the interior from the outside. The operation reliability can be improved.

  As described above, the present invention has been described in detail based on the specific embodiments. However, the present invention is only for explaining the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that modifications and improvements within the technical idea of the present invention are possible.

  All simple variations and modifications of the present invention belong to the scope of the present invention, and the specific scope of protection of the present invention will be apparent from the appended claims.

  The present invention is applicable to a switched reluctance motor assembly.

DESCRIPTION OF SYMBOLS 10 Rotating shaft 20 Rotor part 21 Rotor core 22 Rotor pole 30 Stator part 31 Stator yoke 32 Stator salient pole 41 1st stopper 42 2nd stopper 50 Impeller part 60 Diffuser part 61 Diffuser 62 Return channel 63 Connecting member 71 1st bearing part 72 1st Two bearing parts 80 Motor housing 91 Sensing magnet 92 Printed circuit board 93 Hall sensor

Claims (8)

A rotating shaft that forms the rotation center of the motor;
A rotor unit rotatably coupled on the rotating shaft;
A first stopper coupled to an upper portion in the axial direction of the rotor portion and supporting the rotor portion;
A second stopper coupled to the lower portion of the rotor portion in the axial direction and supporting the rotor portion;
A first bearing portion coupled to an upper portion in the axial direction of the first stopper;
A second bearing portion coupled to an axially lower portion of the second stopper;
A diffuser portion supporting the first bearing portion and coupled to an upper end of the first stopper;
A motor housing that is integrally formed with the diffuser portion and that houses the first bearing portion and the second bearing portion;
Including switched reluctance motor assembly.   The switched reluctance motor assembly according to claim 1, wherein the rotor portion includes an annular rotor core and a plurality of rotor poles protruding outward from the rotor core.   The switched reluctance motor assembly according to claim 1, wherein the first stopper is formed on a balance member for maintaining a rotational balance of the switched reluctance motor.   The stator part further comprising: a stator yoke that accommodates the rotor part; and a stator salient pole that is formed so as to be spaced apart from the rotor pole and project inward of the stator yoke. The switched reluctance motor assembly according to claim 1.   The switched reluctance motor assembly according to claim 1, further comprising an impeller coupled to an upper portion in the axial direction of the diffuser and rotatably coupled to the rotating shaft.   The switched reluctance motor assembly according to claim 1, wherein the diffuser portion includes at least one connecting member integrally coupled to the motor housing.   The switched reluctance motor assembly according to claim 6, wherein the connecting member is formed along an outer periphery of the diffuser portion, protrudes from an outer peripheral surface of the diffuser portion, and is integrally coupled to the motor housing. A sensing magnet formed at a lower portion in the axial direction of the second bearing portion and corresponding to the rotor portion;
A printed circuit board, which is disposed in the lower part of the sensing magnet in the axial direction and has a Hall sensor attached so as to face the sensing magnet,
The switched reluctance motor assembly of claim 1 further comprising:

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