KR100434070B1 - Skeleton type brushless direct current motor - Google Patents

Abstract

The present invention relates to a skeleton-type rectifier motor, comprising: a rotor having a circular cross-sectional shape and different magnetic poles formed around the rotor; The first stator core having a first stator core having an arc-shaped first pole formed to have a predetermined gap with the rotor at one side thereof, and a second pole which is disposed to face the first pole with the rotor therebetween. A second stator core arranged to receive the rotor cooperatively with the second stator core; The first and second poles are magnetically shielded from each other, and foreign matters approaching the rotor side through the boundary region of the first and second poles along the radial direction of the rotor from the outside can be blocked. It characterized in that it comprises a blocking means formed between the first and second pole shoes. Thereby, the skeleton type non-commutator motor which can suppress generation | occurrence | production of a leakage magnetic flux, improve efficiency, and can effectively block a foreign material is provided.

Description

Skeleton type rectifier motor {SKELETON TYPE BRUSHLESS DIRECT CURRENT MOTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skeleton-type rectifier motor, and more particularly, to a skeleton-type rectifier motor that can suppress the generation of leakage magnetic flux, improve efficiency, and effectively block foreign substances.

1 is a longitudinal cross-sectional view of a conventional skeleton-type rectifier motor, and FIG. 2 is a front view of the stator core of FIG. 1. As shown in these figures, the skeleton-type rectifier motor includes a rotor 11, a stator 21 for accommodating the rotor 11 with a predetermined gap, and a driving circuit for the rotor 11. PC is provided (not shown).

The rotor 11 has a circular cross-sectional shape and consists of permanent magnets formed to have mutually different magnetic poles on the circumferential surface. The shaft 13 of the rotor 11 is coupled so that the rotation shaft 13 is integrally rotatable.

A pair of housings 15 rotatably supporting the rotary shaft 13 are coupled to both sides of the stator 21 along the longitudinal direction of the rotary shaft 13, and one side of the stator 21 accommodates the PC ratio. The PC cover 31 is coupled.

The stator 21 includes a stator core 22 formed by insulating lamination of a steel plate, a bobbin 27 coupled to the stator core 22, and a coil 29 wound around the bobbin 27. have.

The stator cores 22 are formed in an arc shape so as to accommodate the rotor 11, and are disposed to face each other with the rotor 11 interposed therebetween, and both ends being integrally connected to each other by the link portion 25. It consists of the 1st core 23a provided with 24a and the 2nd pole shoe 24b, and the 2nd core 23b integrally couple | bonded with the 1st core 23a. Inside each link portion 25 is recessed to extend from the first and second pole shoes 24a and 24b spaced apart radially from the outer diameter surface of the rotor 11 for the initial starting of the rotor 11. Detent grooves 28 are formed, respectively.

By the way, in such a conventional skeleton-type rectifier motor, both side regions of the first pole 24a and the second pole 24b are integrally connected to each other by the link unit 26, and the first pole ( Some of the magnetic fluxes alternately formed in the 24a) and the second pole 24b flow through the link portion 26 to generate a leakage magnetic flux, and the reduction of the effective magnetic flux thereby impairs the efficiency of the device. There is a problem.

Accordingly, an object of the present invention is to provide a skeleton type non-commutator motor capable of suppressing the occurrence of leakage magnetic flux, improving efficiency and effectively blocking foreign substances.

1 is a longitudinal cross-sectional view of a conventional skeleton-type rectifier motor;

Figure 2 is a front view of the stator core of Figure 1,

3 is a front view of a stator of a skeleton-type rectifier motor according to an embodiment of the present invention;

4 is a front view of a stator of a skeleton-type rectifier motor according to another embodiment of the present invention;

5A to 5C are enlarged views of respective contact end regions of the skeleton type non-commutator motor according to still another embodiment of the present invention;

6 is a front view of a stator of a skeleton-type rectifier motor according to still another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11 rotor 13 rotation axis

41: stator 42: first stator core

43: first pole 45: contact end

52: second stator core 53: second pole shoe

55: contact end 60: bobbin

61a: first coil 61b: second coil

The above object is, according to the present invention, a rotor having a circular cross-sectional shape and mutually different magnetic poles formed around; The first stator core having a first stator core having an arc-shaped first pole formed to have a predetermined gap with the rotor at one side thereof, and a second pole which is disposed to face the first pole with the rotor therebetween. A second stator core arranged to receive the rotor cooperatively with the second stator core; The first and second poles are magnetically shielded from each other, and foreign matters approaching the rotor side through the boundary region of the first and second poles along the radial direction of the rotor from the outside can be blocked. It is achieved by a skeleton-type rectifier motor, characterized in that it comprises a blocking means formed between the first and second poles.

Here, the blocking means is formed so that the width along the circumferential direction of the rotor is gradually reduced in at least one of the mutually adjacent ends of the first and second poles to each other line It is preferable to include the contact end to be contacted.

It is effective that the contact end has an arc shape having a predetermined curvature.

It is preferable that the curvature of the contact end is 2 mm or less.

In addition, the contact end is effective to configure the internal angle to the acute angle.

At least one pair of end portions of each pair of adjacent pairs of the first and second poles are spaced apart from each other by a predetermined distance, and the blocking means is arranged to at least the adjacent ends to block the space between the adjacent ends. It is preferable to configure to include an insulating coating layer that is insulated coated on the surface of the.

Here, it is effective to configure the spacing between the end portions of the first and second poles that are adjacent to each other to 0.1 mm or less.

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

3 is a front view of a stator of a skeleton-type rectifier motor according to an embodiment of the present invention. The same and equivalent parts as those described above will be omitted for convenience of description in the drawings and will be described with reference to the same reference numerals. Other embodiments are also the same below. As shown, the rotor 11 is made of a permanent magnet of a circular cross-sectional shape, the stator 41 rotatably holding the rotor 11, and the rotor 11 is integrally coupled to one side of the stator 41; It is configured to include a PC ratio forming a driving circuit.

The stator 41 has a first pore 43 and a second pole 53 which are arranged to face each other with a predetermined gap on the outside of the rotor 11 and the rotor 11 therebetween, respectively. The stator core 42 and the second stator core 52, the bobbin 60 coupled to the second stator core 52, and the first coil 61a and the second wound around the bobbin 60, respectively. It is comprised including the coil 61b.

The first stator core 42 extends along the plate surface direction from one side of the first pole shoe 43 having a “C” shape, which is disposed with a predetermined gap around the rotor 11, and the first pole shoe 43. The first extension part 44 is provided.

The second stator core 52 has a “C” shaped second pole 53 arranged around the rotor 11 so as to face the first pole 43 and a plate direction from one side of the second pole 53. The second extension portion 54 extending along the bend and the bent portion that is bent in contact with the inner edge of the first extension portion 44 from the end of the second extension portion 54 and the bobbin 60 is coupled around (59) is provided.

The first stator core 42 and the second stator core 52 are formed by pressing and insulating the steel sheets, respectively, and are integrally fixed by a rivet 46 or the like penetrated along the plate surface direction. Through-holes 48 are formed in the first stator core 42 and the second stator core 52 through the plate surface so that each screw boss portion of the housing 15 for supporting the rotation shaft 13 can be inserted. It is. An inner edge portion of the first extension portion 44 is formed with a depression 47 recessed in the plate direction, and a protruding portion protruding to be accommodated in the depression 47 in the distal region of the bent portion 59. 57) is formed.

On the other hand, in the areas adjacent to the first and second poles 43 and 53, the leakage of magnetic flux generated when power is applied to the first coil 61a and the second coil 61b can be suppressed. The contact ends 45 and 55 having an arc-shaped cross section are formed so that the width of the rotor 11 gradually decreases toward the mutual contact area.

Here, it is preferable to form the curvature of each contact end part 45 and 55 so that it may become 2 mm or less.

4 is a front view of a stator of a skeleton-type rectifier motor according to another embodiment of the present invention. As shown in the drawing, the stator 41 of the present skeleton-type rectifier motor has a first stator with a first pole 43 and a second pole 53 disposed to face each other with the rotor 11 interposed therebetween. The core 42 and the second stator core 52 are provided. Contact ends 65 and 66 are formed at respective ends of the first and second poles 43 and 53 so that the inner angle α is an acute angle, and each of the contact ends 65 and 66 has a leakage magnetic flux. It is arrange | positioned so that mutual line contact may be made so that generation | occurrence | production can be suppressed.

5A to 5C are enlarged views of respective contact end regions of the skeleton-type rectifier motor according to still another embodiment of the present invention. A contact end formed at each end of the first and second poles 43 and 53 is triangular contact with the acute angle of the inner angle α to the end of the first pole 43, as shown in Figure 5a The first pole shoe 43 and the second pole 53 are mutually contacted by forming an end 67 and a square contact end portion 68 having a rectangular cross-sectional shape at the end of the second pole 53 so as to be in line contact with each other. In addition to the magnetic separation it can block foreign matter from entering.

In addition, as shown in FIG. 5B, an arc-shaped contact end portion 70 having an arc-shaped cross section is formed at the end of the first pole 43, and an inner angle α is acute at the end of the second pole 53. It may be configured to form a triangular contact end 71 to form a, or as shown in Figure 5c may be configured to be in line contact with each other by forming a square contact end 68 to the end of the second pole 53.

By such a configuration, when power is alternately applied to the first coil 61a and the second coil 61b to correspond to the position of the magnetic pole of the rotor 11 by the driving circuit, the first pole 43 and the first pole are made. The magnetic flux is generated in the two poles 53. At this time, the contact end portion formed so that the width along the radial direction of the rotor 11 gradually decreases in at least one of the mutually adjacent ends of the first pole 43 and the second pole 53 at a relatively high speed. By reaching the magnetic saturation value, the magnetic resistance is increased, thereby suppressing the occurrence of leakage magnetic flux and blocking foreign substances flowing into the rotor 11 from the outside.

6 is a front view of a stator of a skeleton-type rectifier motor according to still another embodiment of the present invention. As illustrated, the stator 41 is disposed to face each other with the rotor 11 interposed therebetween, and includes the first and second pole shoes 43 and 53 having end portions 75 and 76 having a rectangular cross section. Is provided with the first stator core 42 and the second stator core 52, respectively. The first stator core 42 and the second stator core 52 have a gap G between the respective ends of the first and second poles 43 and 53 in consideration of the thickness of the insulating coating layer to be formed on the surface. They are integrally coupled to each other so as to have a thickness of 0.1 mm or less.

An insulating coating layer 77 having a predetermined thickness is formed on the surfaces of the first stator core 42 and the second stator core 52 by an insulating coating material such as synthetic resin, and the first pole 43 and the second Between each end of the pole shoe 53, the first pole 43 and the second pole 53 are magnetically separated from each other to suppress the occurrence of the magnetic flux leakage, and foreign matter is introduced from the outside through this gap G from the rotor ( 11) an insulating coating layer 77 is formed to block the flow to the side.

As described above, according to the present invention, the first stator core and the second stator core are formed between the first and second streaks formed with the rotor interposed therebetween, and between the first and second poles. The first and second poles are blocked magnetically, and blocking means are provided to block foreign substances flowing in from adjacent areas of the first and second poles. Skeleton-type rectifier motors are provided to increase efficiency and to effectively block foreign matter.

Claims (7)

A rotor having a circular cross-sectional shape and mutually different magnetic poles formed around the rotor; The first stator core having a first stator core having an arc-shaped first pole formed to have a predetermined gap with the rotor at one side thereof, and a second pole which is disposed to face the first pole with the rotor therebetween. A second stator core arranged to receive the rotor cooperatively with the second stator core; The first and second poles are magnetically shielded from each other, and foreign matters approaching the rotor side through the boundary region of the first and second poles along the radial direction of the rotor from the outside can be blocked. Skeleton-type rectifier motor, characterized in that it comprises a blocking means formed between the first pole and the second pole. The method of claim 1, The blocking means may be formed in at least one of the ends adjacent to each other of the first and second poles so that the width along the circumferential direction of the rotor is gradually reduced so as to be in line contact with each other. Skeleton-type rectifier motor, characterized in that it comprises a contact end. The method of claim 2, Skeleton-type rectifier motor, characterized in that the contact end has an arc shape having a predetermined curvature. The method of claim 3, And the curvature of the contact end is 2 mm or less. The method of claim 2, Skeleton-type rectifier motor, characterized in that the contact end is an acute angle of the inner angle. The method of claim 1, At least one pair of end portions of each pair of adjacent pairs of the first and second poles are spaced apart from each other by a predetermined distance, and the blocking means is arranged to at least the adjacent ends to block the space between the adjacent ends. Skeleton-type rectifier motor, characterized in that it comprises an insulating coating layer is coated on the surface of the. The method of claim 6, Skeleton-type commutator motor, characterized in that the spacing of the adjacent ends of the first and second poles 0.1mm or less.