Fusion type BLDC motor

Abstract

The present invention relates to a fused BLDC motor that fuses radial electromagnetic force and axial electromagnetic force to maximize the electromagnetic interaction force between a rotor and a stator, wherein the motor comprises a rotor including a disc-shaped rotor core, a disc ledge formed to extend horizontally around the outer circumference of the rotor core and having a flat lower surface, a circular ledge formed to extend in a circular manner downward from the lower surface of the rotor core, a plurality of first magnets attached along the lower surface of the disc ledge, and a plurality of second magnets attached along the outer circumference of the circular ledge; A stator comprising: a disc-shaped stator core; a plurality of vertical members formed vertically while protruding upward along the upper circumference of the upper surface of the stator core; a vertical pole formed by extending vertically upward from the upper end of the vertical members to be close to the first magnet; a horizontal pole formed by extending horizontally inward from the inner surface of the vertical members to be close to the second magnet; and a coil wound on the outer surface of the vertical members below the horizontal pole.

Description

Technology Field

[0001] The present invention relates to a BLDC motor, and more specifically, to a fused BLDC motor that fuses radial electromagnetic force and axial electromagnetic force to maximize the electromagnetic interaction force between the rotor and the stator. Background Technology

[0002] In general, as improvements are required regarding the reduced reliability, shortened lifespan, and consequent maintenance needs arising from the switching drive based on the contact between the commutator and brushes of conventional DC motors, they are recently being replaced by brushless DC motors (BLDC motors) that use electronic switching methods utilizing electronic components. BLDC motors have advantages such as a long lifespan due to the switching method using semiconductor components, high efficiency and miniaturization using high-energy-density magnets, and easy speed control, leading to an increase in demand.

[0003] FIG. 8 is a cross-sectional view of a conventional general BLDC motor, and as shown in FIG. 8, the basic configuration includes a rotor (10) comprising a general rotating shaft (12) and a rotor yoke (14) formed on the outer diameter of the rotating shaft (12), a plurality of permanent magnets (20) attached along the circumferential direction on the outer diameter surface of the rotor yoke (14), a stator (30) comprising a circular body portion (32) and a plurality of stator cores (34) formed integrally at equal intervals along the circumferential direction on the inner diameter portion of the circular body portion (32) and arranged adjacent to the permanent magnets (20), and a coil (40) wound on the stator core (34).

[0004] The permanent magnets (20) of these rotors (10) are paired to face each other. The stator (30) is formed by stacking multiple core plates, and a housing (not shown) made of steel is provided on the outer surface of the stator (30).

[0005] When current is applied to the coil wound on the stator core of such a BLDC motor, the rotor rotates due to electromagnetic interaction with the stator, and as a result, the rotor's axis of rotation rotates.

[0006] Meanwhile, another type of motor is the axially wound motor. In this type of motor, the magnetic flux flow is formed axially; it has a high power density, and because the motor diameter is large relative to the axial length, it allows for the design of a relatively large number of poles, making it suitable for high-frequency or low-speed driving.

[0007] This axially wound motor also includes a stator that forms a magnetic field and a rotor that is rotatably configured relative to the stator. The stator includes a plurality of cores arranged at regular intervals along the circumferential direction and protruding to a certain height in the axial direction, and the cores are axially coupled to grooves formed in the stator. The rotor includes permanent magnets arranged at regular intervals along the circumferential direction and is configured to rotate while forming a certain gap with the stator. The axially wound motor generates rotational torque by creating a repulsive or attractive force between the core and the permanent magnets of the rotor through switching the direction of the current flowing through the coils wound on the core.

[0008] However, the conventional technology described above had the following problems.

[0009] Conventional BLDC motors had a problem in that the maximization of the electromagnetic interaction force between the rotor and the stator was not properly achieved due to the structure of a single standardized rotor and stator. Prior art literature

[0010] Registered Patent No. 2717142 "BLDC blower motor having a stator with a heat dissipation structure" (September 18, 2014) The problem to be solved

[0011] Accordingly, the present invention has been devised to resolve the various problems of the prior art as described above.

[0012] The objective of the present invention is to provide a fused BLDC motor that fuses radial electromagnetic force and axial electromagnetic force to maximize the electromagnetic interaction force between the rotor and the stator. means of solving the problem

[0013] To achieve the above objectives, the "fusion type BLDC motor" according to the present invention comprises: a rotor including a disc-shaped rotor core, a disc ledge formed by extending horizontally around the outer circumference of the rotor core and having a flat lower surface, a circular ledge formed by extending in a circular manner downward from the lower surface of the rotor core, a plurality of first magnets attached along the lower surface of the disc ledge, and a plurality of second magnets attached along the outer circumference of the circular ledge; and a stator including a disc-shaped stator core, a plurality of vertical members formed vertically while protruding upward along the upper circumference of the stator core, a vertical pole formed by extending vertically upward from the upper end of the vertical members to be close to the first magnet, a horizontal pole formed by extending horizontally inward from the inner surface of the vertical members to be close to the second magnet, and a coil wound on the outer surface of the vertical members below the horizontal pole.

[0014] In addition, the rotor of the "fusion type BLDC motor" according to the present invention further includes a vertical through hole formed vertically in the center of the rotor core so as to mount a rotation shaft, and the vertical pole is characterized in that the upper surface of the vertical pole corresponding to the first magnet is formed flat.

[0015] In addition, the stator of the "fusion type BLDC motor" according to the present invention further includes a through hole formed to penetrate the center of the stator core into the inner side of the vertical member, and the horizontal pole is characterized in that the inner surface of the horizontal pole corresponding to the second magnet is formed flat. Effects of the invention

[0016] The present invention, as described above, fuses radial electromagnetic force and axial electromagnetic force to maximize the electromagnetic interaction force between the rotor and the stator, thereby having the effect of improving the output of the motor. Brief explanation of the drawing

[0017] FIG. 1 is a schematic exploded perspective view of the main parts of a BLDC motor according to the present invention. FIG. 2 is a schematic perspective view of the combined key parts of a BLDC motor according to the present invention. FIG. 3 is a schematic longitudinal section view of a key part of a BLDC motor according to the present invention, FIG. 4 is a schematic perspective view of a key part of a BLDC motor according to the present invention. Fig. 5 is an enlarged view of the main part of Fig. 4, FIG. 6 is a schematic longitudinal section view of a key part of a BLDC motor according to the present invention, Fig. 7 is an enlarged view of the main part of Fig. 6, FIG. 8 is a schematic plan view of a key part showing an example of a conventional BLDC motor. Specific details for implementing the invention

[0018] Preferred embodiments of the present invention are described in more detail below with reference to the accompanying drawings. However, it should be understood that the present invention may be implemented in a number of different forms and is not limited to the described embodiments.

[0019] FIGS. 1 to 7 are schematic drawings of a BLDC motor according to the present invention. As illustrated herein, the fused BLDC motor according to the present invention includes a rotor (100) to which a rotational axis is coupled, and a stator (200) positioned in close proximity to the rotor (100).

[0020] The above rotor (100) comprises a disc-shaped rotor core (101), a disc ledge (102) formed by extending horizontally around the outer circumference of the rotor core (101) and having a flat lower surface, a circular ledge (103) formed by extending in a circular manner downward from the lower surface of the rotor core (101), a plurality of first magnets (104) attached along the lower surface of the disc ledge (102), and a plurality of second magnets (105) attached along the outer circumference of the circular ledge (103).

[0021] The rotor core (101) serves to provide a region where the disc ledge (102) and the circular ledge (103) are formed. The disc ledge (102) serves to provide a location where the first magnet (104) is attached, arranged in a circular pattern facing the lower surface along the outer circumference of the rotor core (101). The circular ledge (103) serves to provide a location where the second magnet (105) is attached, arranged in a circular pattern along the outer circumference of the lower part of the rotor core (101).

[0022] The first magnet (104) and the second magnet (105) are permanent magnets that correspond to the electromagnetic force of the stator (200) and serve to rotate the rotor core (101) with magnetic force. As the magnetic force increases due to the first magnet (104) and the second magnet (105), the output of the rotor (100) is improved.

[0023] The rotor (100) described above further includes a vertical through hole (106) formed vertically in the center of the rotor core (101). The vertical through hole (106) serves to provide a portion for mounting a rotating shaft installed in the motor.

[0024] The above stator (200) comprises a disc-shaped stator core (201), a plurality of vertical members (202) formed vertically while protruding upward along the upper circumference of the stator core (201), a vertical pole (203) formed by extending vertically upward from the upper end of the vertical members (202) to be close to the first magnet (104), a horizontal pole (204) formed by extending horizontally inward from the inner surface of the vertical members (202) to be close to the second magnet (105), and a coil (205) provided by being wound on the outer surface of the vertical members (202) below the horizontal pole (204).

[0025] The stator core (201) serves to provide a place where the vertical member (202) is formed and supported, and the vertical member (202) serves to provide a place where the vertical pole (203) and the horizontal pole (204) are formed and supported, and is formed of a metal material to be formed integrally with the vertical pole (203) and the horizontal pole (204) and magnetized by the coil (205).

[0026] The vertical pole (203) is magnetized by the coil (205) to become an electromagnet and plays a role in rotating the rotor (100) with an axial electromagnetic force corresponding to the first magnet (104), and the horizontal pole (204) is magnetized by the coil (205) to become an electromagnet and plays a role in rotating the rotor (100) with a radial electromagnetic force corresponding to the second magnet (105).

[0027] In this way, the vertical pole (203) and the horizontal pole (204) are formed of a metal material to be magnetized by the coil (205), and by generating axial and radial electromagnetic forces corresponding to the first magnet (104) and the second magnet (105), the rotational force, i.e., the output, of the rotor (100) is improved.

[0028] It is preferable that the upper surface of the vertical pole (203) corresponding to the first magnet (104) be formed flat, so that the electromagnetic force of the vertical pole (203) can be appropriately applied to the first magnet (104).

[0029] In addition, it is preferable that the inner surface of the horizontal pole (204) corresponding to the second magnet (105) be formed flat, so as to ensure that the electromagnetic force of the horizontal pole (204) can be appropriately applied to the second magnet (105).

[0030] The coil (205) is connected to a power source and supplies electricity, thereby magnetizing the vertical member (202), the vertical pole (203), and the horizontal pole (204) into electromagnets.

[0031] The stator (200) further includes a through hole (206) formed to penetrate the center of the stator core (201) into the inner side of the vertical member (202). The through hole (206) serves to provide a passage through which the rotation axis (not shown) penetrates into the inner side of the stator core (201).

[0032] The outer surface of the above-mentioned rotor (100) and stator (200) is provided with a housing (not shown) made of steel, and a rotating shaft rotatably supported by the housing is mounted on the rotor (100).

[0033] The BLDC motor configured in this manner is a groundbreaking invention that fuses radial electromagnetic force and axial electromagnetic force to maximize the electromagnetic interaction force between the rotor (100) and the stator (200).

[0034] Although preferred embodiments of the present invention have been described above, the present invention may use various variations, modifications, and equivalents. It is clear that the present invention can be applied in the same way by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

[0035] Meanwhile, although specific embodiments have been described in the detailed description of the present invention, it will be obvious to those skilled in the art that various modifications are possible within the scope of the present invention. Explanation of the symbols

[0036] 100 : Rotor 101 : Rotor Core 102 : Disc Jaw 103: Round jaw 104: First magnet 105: Second magnet 106: Vertical through hole 200 : Status 201: Stator core 202: Vertical member 203 : Vertical pole 204 : Horizontal pole 205 : Coil 206 : Through hole

Claims

Claim 1 A rotor (100) comprising: a disc-shaped rotor core (101); a disc ledge (102) formed by extending horizontally around the outer circumference of the rotor core (101) and having a flat lower surface; a circular ledge (103) formed by extending in a circular manner downward from the lower surface of the rotor core (101); a plurality of first magnets (104) attached along the lower surface of the disc ledge (102); and a plurality of second magnets (105) attached along the outer circumference of the circular ledge (103); a disc-shaped stator core (201); a plurality of vertical members (202) formed vertically while protruding upward along the upper circumference of the stator core (201); a vertical pole (203) formed by extending vertically upward from the upper end of the vertical members (202) so as to be close to the first magnet (104); and to the second magnet (105 A fused BLDC motor comprising: a stator (200) including a horizontal pole (204) formed by extending horizontally inward from the inner surface of the vertical member (202) so as to be close to it, and a coil (205) wound on the outer surface of the vertical member (202) below the horizontal pole (204); wherein the rotor (100) further comprises a vertical through hole (106) formed vertically in the center of the rotor core (101) so as to mount a rotation axis, and wherein the vertical pole (203) is characterized in that the upper surface of the vertical pole (203) corresponding to the first magnet (104) is formed flat. Claim 2 delete Claim 3 A fused BLDC motor according to claim 1, wherein the stator (200) further includes a through hole (206) formed to penetrate the center of the stator core (201) into the inner side of the vertical member (202), and the horizontal pole (204) is characterized in that the inner surface of the horizontal pole (204) corresponding to the second magnet (105) is formed flat.

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