KR101026084B1 - Slim type motor having slim type stator, and direct drive apparatus for drum-washing machine using the same - Google Patents

Abstract

The present invention relates to a slim motor including a slim stator for manufacturing a BLDC motor having a split-core stator and a double rotor for a medium / small built-in drum washing machine, and a direct drive device for a drum washing machine using the same. .
The motor of the present invention is rotatably mounted to the housing of the device and the rotating shaft coupled to the fixed end portion; The inner and outer rotors, each of which has a plurality of N-pole and S-pole magnets alternately arranged in a reduced phase, and one end of the inner and outer rotors are connected to each other, and an inner circumference thereof is positioned at the center of gravity of the rotor and coupled to the rotating shaft. A double rotor having a rotor support extending in the bushing; Coils are continuously and alternately wound for each phase in a plurality of split cores each having an integral bobbin integrally formed on an outer circumference thereof, and include a stator assembled in an annular shape and integrated by a stator support. It is characterized in that it comprises a terminal assembly holder disposed between the split core of each phase having a respective terminal housing for connecting the one-side coil terminal of each phase coil and each phase lead wire for external drawing.

Description

Slim type motor including slim type stator and direct drive device for drum washing machine using the same type {slim type motor having slim type stator, and direct drive apparatus for drum-washing machine using the same}

The present invention relates to a slim type motor including a slim stator and a direct type driving device for a drum washing machine using the same. More specifically, a BLDC motor including a stator and a double rotor of a split core structure is used for a medium / small built-in drum washing machine. The present invention relates to a slim type motor including a slim stator for manufacturing for a drum and a direct type driving device for a drum washing machine using the same.

In general, the drum washing method is a method of washing the laundry using the friction force of the rotating drum and the laundry by receiving the driving force of the motor in a state in which detergent, washing water and laundry are put in the drum, there is little damage to the laundry, laundry These don't get tangled with each other and can have a pounding and scrubbing wash effect.

Existing drum washing machine has an indirect connection method in which the driving force of the motor is indirectly transmitted to the drum through a belt wound between the motor pulley and the drum pulley, and the shaft connected to the rotor of the BLDC motor is directly connected to the drum depending on the driving method. It is divided into a direct drive (DD) through which the driving force of the motor is transmitted.

Here, the belt-pulley driving method in which the driving force of the motor is not directly transmitted to the drum but is transmitted through a belt wound between the motor pulley and the drum pulley causes energy loss during the driving force transmission process, and generates a lot of noise in the power transmission process. Done.

Therefore, in order to solve the problems of the conventional drum washing machine, the use of a direct drum washing machine using a BLDC motor is increasing.

Meanwhile, in Japan and Europe, medium and small drum washing machines with a washing capacity of 5-8 kg are installed in a built-in manner for efficient use of indoor living spaces.

In this built-in method, the size of a given installation space in which a washing machine can be installed is generally set to 600 × 600 × 600 mm in width × length × height, and the tub washing machine tub is considered in consideration of the washing capacity of a small / small drum washing machine. The space (length) in which the drive device can be installed from the tub to the rear housing of the drum washing machine is determined to be approximately 45 mm.

In this case, the tub is elastically supported by a spring and a damper inside the housing of the drum washing machine so as to absorb shock during forward / reverse rotation driving of the basket that is rotatably supported therein.

Therefore, in order to prevent the tub from being damaged when the flow occurs in the front and rear direction, it is necessary to secure a clearance (length) of approximately 15-20 mm, so that the space (length) for installing the driving device is subtracted from 45 mm to 20 mm. A space of 25 mm is given.

In the built-in drum washing machine, the driving device, that is, the driving motor, which can satisfy the 25 mm thickness condition cannot be presented due to the narrow space (length) in which the driving device can be installed.

That is, the drive motors developed to date have been developed for large drum washing machines having a thickness of 63 mm or more. Therefore, in a built-in drum washing machine, it is inevitable to reduce the washing capacity in order to implement them directly using such large drive motors. There was a problem to take to reduce the length of the tub.

Due to this situation, in order to reduce the size of the tub conventionally, the belt-pulley indirect driving method is adopted to place the motor in the lower part of the drum washing machine, and the basket must be indirectly driven through the belt wound on the pulley. The problem remains. Therefore, the need to reduce the size of the motor has been increased to apply to the drum washing machine.

Therefore, there is a demand for the development of a slim driving motor capable of satisfying the condition of 25 mm thick, which can be directly applied to a medium / small built-in drum washing machine having a washing capacity of 5-8 kg.

Hereinafter, referring to the attached FIG. 1, the structure of a direct drum washing machine using a BLDC motor according to the related art disclosed in Korean Laid-Open Patent Publication No. 2005-12399 is as follows.

1 is a schematic view showing a conventional direct drum washing machine.

Referring to FIG. 1, a tub 200 is installed inside a cabinet 100, and a drum (or basket) 300 is rotatably installed at an inner center of the tub 200. The motor 500 for rotating the drum 300 is installed in the support bracket 250 coupled to the tub 200.

The motor 500 is rotatably coupled by two upper / lower bearings 610 and 620 provided in the bearing housing 600 installed on the support bracket 250 facing the rear center portion of the tub 200. ) And a core type stator 520 which forms a rotating magnetic field by winding a coil and flowing current through the coil after laminating a plurality of iron cores, and is rotated by a rotating magnetic field formed by the stator 520 to drive a shaft ( The outer rotor 510 includes a magnet disposed at an outer circumference of the stator to rotate 700.

Here, the rotor 510 constituting the motor 500 is fastened to the center of the rear end of the driving shaft 700, and the tub 200, that is, the rear wall portion of the support bracket 250 is inside the rotor 510. The stator 520 which is fastened and fixed and constitutes the motor 500 together with the rotor 510 is positioned.

In the washing machine of FIG. 1, when an operation button is pressed to drive, a rotating magnetic field is generated in the stator 520 while power is applied to the stator 520 of the motor 500. This rotor magnetic field is generated at the tip of the winding part by a coil wound around the winding part (not shown) of the stator 520, so that the rotor 510 close to the tip of the winding part rotates according to Fleming's left hand law. Done.

Therefore, as the drive shaft 700 coupled to the upper and lower bearing housings 600 and the tub 200 is rotated by the rotation of the rotor 510, the drum 300 may be reversed to wash the laundry.

As described above, in the conventional direct type drum washing machine, when the motor 500 adopts the outer rotor structure and is installed in the space between the tub 200 and the back of the washing machine, the rear space from the tub 200 to the back of the drum washing machine ( A) is divided into the motor installation space B occupied by the motor 500 and the shaking space C of the tub 200 of approximately 20 mm.

However, the conventional motor 500 illustrated in FIG. 1 includes a plurality of cooling fins and cooling holes around the tub portion of the rotor 510 to cool the heat generated by the stator 520. In the conventional motor 500, the cooling fin structure extending into the motor and the support bracket 250 coupled to the rear of the tub 200 serve as obstacles in designing a slim motor, and have a large capacity (washing capacity). 10Kg) It is mainly used for washing machines.

In general, a motor used as a drum driving device of a washing machine includes a stator wound around an integrated stator core or a split stator core in a single outer rotor to obtain large rotational inertia.

Therefore, designing such a conventional outer rotor type drive motor as a slim motor (thickness of 25 mm) that can be directly applied to a built-in drum washing machine is required for medium and small drum washing machines having a washing capacity of 5-8 kg. There is a problem of failing to match the drive torque.

On the other hand, since the core type BLDC motor has a structure in which the magnetic circuit is symmetrical in the radial direction about the axis, there is little vibrational noise in the axial direction, suitable for low speed rotation, and extremely small portion of the void in the direction of the magnetic path. High magnetic flux density can be obtained even by using this low magnet or reducing the amount of magnet, which has the advantage of high torque and high efficiency.

However, these cores, that is, yoke structures, have a large loss of material in yokes when producing stators, and due to the complicated structure of yokes, special expensive winding machines must be used for winding coils on yokes. In addition, there is a drawback that the investment in equipment is high due to the high investment in mold when manufacturing the stator.

In core-type AC or BLDC motors, especially radial type core motors, the configuration of the stator core in the fully split type determines the competitiveness of the motor because the coil can be wound around the split core with high efficiency using a low cost universal winding machine. This is a very important factor. On the contrary, in the case of the integrated stator core structure, an expensive dedicated winding machine is used and a low efficiency winding is made, thus increasing the manufacturing cost of the motor.

In the radial type core motor, the configuration of the stator core in the fully split type in order to improve the efficiency of the coil winding has a problem of not forming a complete magnetic circuit when combined with a single rotor.

In view of this, the present applicant has proposed a BLDC motor in which the stator core can be configured in a fully divided type by having a double rotor / single stator structure as a radial core type in Korean Laid-Open Patent Publication No. 2004-0002349. .

In Korean Patent Laid-Open Publication No. 2004-0002349, the permanent magnet rotor is disposed on the inside and the outside of the stator core at the same time to form the flow of the jar by the inside and outside of the permanent magnet and the rotor yoke to completely divide the stator core. It is possible to propose a structure that can greatly increase the productivity of the stator core and the output of the motor by means of individual coil windings.

In addition, in Korean Patent Laid-Open Publication No. 2004-0002349, after preparing a plurality of split core assemblies having coils wound in accordance with splitting of cores, the integrated stator is formed by molding into a reduced shape by insert molding using a thermosetting resin. A schematic method of preparation was proposed.

However, Korean Patent Laid-Open Publication No. 2004-0002349 does not provide a stator assembly structure / method which can be effectively assembled when interconnecting coils by assembling a plurality of individual cores integrally before insert molding.

In consideration of this point, Korean Laid-Open Patent Publication No. 2005-0000245 discloses a reduced core support plate for accommodating and supporting a plurality of stator core assemblies wound at bobbins at regular intervals and simultaneously connecting a plurality of coils to phases. And, there is proposed a structure that can increase the assembly productivity of the stator by having an automatic positioning / support means for automatically positioning and supporting a plurality of stator core assemblies at regular intervals on the core support plate.

The above-described BLDC motor will be described in more detail with reference to FIG. 2.

Referring to FIG. 2, the BLDC motor is supported by various fastening means such as bolts / nuts on the inner circumference of the core support plate 14 on the housing 20, and a plurality of fully split stator cores have a coil on the outer circumference of the bobbin. The stator 13 is wound and assembled in a reduction type, and a plurality of magnets 16a and 16b are disposed in a reducing type with a predetermined magnetic gap in the inner and outer circumferences of the stator 13, and the inner rotor 15a is disposed. ) And the outer rotor 15b are rotatably supported by the rotor 15 having a double rotor structure supported by the yoke frame 18 and the housing 20 through a bearing 11 and the yoke frame 18. It includes a rotary shaft 19 connected through the bushing 17 in the center of the.

The stator 13 is reduced by insert molding using a thermosetting resin in a state where a plurality of split stator cores are preassembled to a reduced core support plate 14 with a plurality of stator core assemblies wound around coils on a periphery of the bobbin. It is formed integrally with the mold.

In FIG. 2, reference numeral 12 denotes, for example, a power supply terminal block for a three-phase driving stator coil, and 10 denotes a cooling hole.

In the above-described motor, a core support plate 14 is disposed below the stator 13 to provide a connection space for connecting coils wound on a plurality of split stator cores, and to supply power to the motor coil. Since the terminal block 12 protrudes from the stator support, the overall thickness of the motor is made thick, such as about h = 63 mm, as shown in FIG. In addition, when the above-described motor is applied to the drum washing machine, since the drum diameter of the drum washing machine is large diameter of 220 to 260 mm, the diameter of the annular core support plate should also be large diameter in proportion thereto, which is very disadvantageous in terms of manufacturing cost and assembly of the annular core support plate. .

Since the overall thickness of the motor is so thick, it is desirable to integrate a plurality of stator cores wound with coils by insert molding using a thermosetting resin, without using the annular core support plate as described above.

On the other hand, in the case of a large motor, in general, a plurality of stator poles and a plurality of rotor poles form a combined structure, and in the case of a split core method, a continuous winding is made on a plurality of cores consisting of a plurality of split cores. It is preferable in terms of assembly productivity rather than winding the split cores individually.

The technique of fabricating a motor by assembling a plurality of split cores without an annular core support plate by such a continuous winding is disclosed in Patent No. 663641 registered by the present applicant.

In addition, the motor proposed in the patent performs the wiring of coils wound on a plurality of split cores in the lower space of the stator, the terminal block for supplying power to the motor coil protrudes in the thickness direction from the stator support, washing machine Since the inner extension of the stator support for coupling with the housing (for example, the tub) does not have a slim structure, it cannot be applied as a slim motor that can be directly applied to the built-in drum washing machine.

Accordingly, an object of the present invention is a built-in built-in medium / small drum washing machine, which is installed in an allowable 25 mm space without reducing the size of the tub related to the washing capacity, and can be directly driven to rotate the basket inside the tub. The present invention provides a direct drive for an in- drum washing machine.

Another object of the present invention is to omit the wiring work between the divided core assembly in which coils are wound for each phase by continuously winding coil windings for a plurality of split stator cores for each of U, V, and W phases, and a thermosetting resin. The present invention provides a slim motor including a split core slim stator capable of manufacturing a split core assembly by removing the PCB for split core assembly by using a coupling between bobbins for preliminary assembly between adjacent split core assemblies for furnace molding.

Another object of the present invention is to increase the diameter of the motor and reduce the spot rate of the coils between adjacent split cores by increasing the number of slots and poles of the stator and rotor, thus ensuring a three-phase coil terminal in the space between the cores secured. By providing a terminal assembly holder and a terminal housing for connecting the terminal to the power supply terminal block to minimize the height of the terminal block to provide a slim motor including a split core type slim stator that can be made slim.

Another object of the present invention is to place the bushing of the rotor coupled to the rotary shaft and the inner extension of the stator coupled to the tub in the center of the motor to shorten the axial length (ie, thickness) of the motor to a minimum, The present invention provides a slim motor for a built-in drum washing machine using a slim stator capable of minimizing vibration.

Still another object of the present invention is to adopt a double rotor structure which does not reduce the size of the magnet, but has a slim structure, which is suitable for driving a drum washing machine operating in a quick reversal method due to high motor efficiency and high driving torque of the motor. Provides motor for drum washing machine.

Another object of the present invention is to provide a slim washing machine for a drum washing machine which can be applied even if the inclination angle of the inclined drum washing machine is increased by reducing the overall height and increasing the outer diameter by shortening the axial length of the motor to a minimum.

Direct drive device of the drum washing machine according to the present invention for achieving the above object is rotatably mounted to the tub of the drum washing machine and the rotating shaft is coupled to the front end of the basket; Internal and external rotors each of which a plurality of N-pole and S-pole magnets are alternately arranged in a reducing phase on different concentric circles, and opposite magnets are arranged to have opposite polarities at a predetermined distance between the inside and the outside; And a double rotor having a rotor support connected to one end of the outer rotor and extending in a bushing in which the inner circumferential portion is positioned at the center of gravity of the rotor and engaged with the rotating shaft; A plurality of bobbins each having a coupling protrusion and a coupling groove at both side ends of the first flange disposed inwardly and having coil winding grooves between the first and second flanges formed on the inner and outer sides surrounding each intermediate portion, respectively It has a plurality of split cores formed on the outer periphery, and is assembled in an annular shape by mutually coupling the coupling groove and the coupling protrusion between adjacent split core bobbins, U, V, W three-phase coil is The stator support includes an integral stator shaped on the outer periphery to integrate the split stator core assembly that is wound continuously and alternately.

Another drum washing machine of the present invention includes a rotating shaft rotatably mounted to the tub of the drum washing machine, the basket being coupled to the front end of the drum washing machine; Internal and external rotors each of which a plurality of N-pole and S-pole magnets are alternately arranged in a reducing phase on different concentric circles, and opposite magnets are arranged to have opposite polarities at a predetermined distance between the inside and the outside; And a double rotor having a rotor support connected to one end of the outer rotor and extending in a bushing in which the inner circumferential portion is positioned at the center of gravity of the rotor and engaged with the rotating shaft; It includes a stator in which a split stator core assembly in which a U, V, W three-phase coil is continuously and alternately wound and assembled in an annular shape to a plurality of split cores each having an integral bobbin integrally formed on its outer periphery, using a stator support. The stator support has an annular inner extension extending in the direction of the center of gravity from the outside of the stator to be bent in two stages so as to be fixedly coupled to the tub engaging portion of the drum washing machine projecting into the center of the stator.

The inner extension of the stator support is arranged concentrically with the bushing.

The driving device is disposed between a plurality of split cores wound around U, V, and W three-phase coils, and is used to connect one coil terminal of the U, V, and W three-phase coils to a three-phase lead wire for external drawing. It further comprises a terminal assembly holder having a common terminal housing used to connect the third terminal housing and the other coil terminal of the U, V, W three-phase coil to form a neutral point.

The bobbin further includes first and second coupling protrusions at lower centers of the first and second flanges, respectively, and the terminal assembly holder further includes a coupling hole coupled to and fixed to the first and second coupling protrusions. .

The first to third terminal housings and the common terminal housing of the terminal assembly holder are disposed one by one between the split cores.

The stator includes a plurality of split cores; It is formed on the outer periphery of each of the plurality of split cores, has a first and a second flange on one side and the other side, and has an engaging protrusion and a coupling groove, respectively, on both side ends of the first flange disposed inside during assembly. A plurality of bobbins arranged in an annular shape by coupling the coupling grooves and the coupling protrusions between adjacent split stator core bobbins; A U, V, W three-phase coil continuously wound on bobbins of each phase alternately arranged for each of the U, V, and W phases; It consists of a stator support molded into an annular shape by insert molding using a thermosetting resin, except for the inner and outer surfaces of each split core of the split stator core assembly having coils wound around the plurality of bobbins.

The drive device has a thickness of 25 mm or less, and the drum washing machine is installed in a built-in manner in a space where the width × length × height is set to 600 × 600 × 600 mm. At this time, the coil is preferably made of Cu or Al.

The rotor support may include a trench forming portion surrounding a periphery of the inner rotor and the outer rotor and forming a trench groove in which a tip of the stator is inserted between the inner rotor and the outer rotor, and a predetermined length from the trench forming portion toward the center of the rotor. After extending in a straight line, the inclined connection portion is formed in two stages bent toward the center of gravity of the rotor, and a bushing support portion for supporting the bushings inside the tip portion of the inclined connection portion is connected to the outer peripheral portion.

The slim motor according to the present invention includes a rotating shaft rotatably mounted to a housing of the apparatus and having a driven body coupled and fixed to a front end thereof; Internal and external rotors each of which a plurality of N-pole and S-pole magnets are alternately arranged in a reducing phase on different concentric circles, and opposite magnets are arranged to have opposite polarities at a predetermined distance between the inside and the outside; And a double rotor having a rotor support connected to one end of the outer rotor and extending in a bushing in which the inner circumferential portion is positioned at the center of gravity of the rotor and engaged with the rotating shaft; A plurality of bobbins each having a coupling protrusion and a coupling groove at both side ends of the first flange disposed inwardly and having coil winding grooves between the first and second flanges formed on the inner and outer sides surrounding each intermediate portion, respectively It has a plurality of split cores formed on the outer periphery, and is assembled in an annular shape by mutually coupling the coupling groove and the coupling protrusion between adjacent split core bobbins, U, V, W three-phase coil is The stator support includes an integral stator shaped on the outer periphery to integrate the split stator core assembly that is wound continuously and alternately.

Still another slim motor according to the present invention includes a rotating shaft rotatably mounted to a housing of the apparatus and having a driven body coupled and fixed to a front end thereof; Internal and external rotors each of which a plurality of N-pole and S-pole magnets are alternately arranged in a reducing phase on different concentric circles, and opposite magnets are arranged to have opposite polarities at a predetermined distance between the inside and the outside; And a double rotor having a rotor support connected to one end of the outer rotor and extending in a bushing in which the inner circumferential portion is positioned at the center of gravity of the rotor and engaged with the rotating shaft; It includes a stator in which a split stator core assembly in which a U, V, W three-phase coil is continuously and alternately wound and assembled in an annular shape to a plurality of split cores each having an integral bobbin integrally formed on its outer periphery, using a stator support. The stator support has an annular inner extension which is bent in two stages and extends in the direction of the center of gravity from the outside of the stator to be placed concentrically with the bushing and fixedly coupled to the housing of the device.

The motor may be disposed between a plurality of split cores wound around U, V, and W three-phase coils, and used to connect one coil terminal of the U, V, and W three-phase coils to a three-phase lead wire for external drawing. The terminal assembly holder further comprises a common terminal housing used to connect the third terminal housing and the other coil terminals of the U, V, and W three-phase coils to form a neutral point.

The bobbin further includes first and second coupling protrusions at lower centers of the first and second flanges, respectively, and the terminal assembly holder further includes a coupling hole coupled to and fixed to the first and second coupling protrusions. .

The stator includes a plurality of split cores; It is formed on the outer periphery of each of the plurality of split cores, has a first and a second flange on one side and the other side, and has an engaging protrusion and a coupling groove, respectively, on both side ends of the first flange disposed inside during assembly. A plurality of bobbins arranged annularly by mutually coupling the coupling grooves and the coupling protrusions between adjacent split stator core bobbins; A U, V, W three-phase coil continuously wound on bobbins of each phase alternately arranged for each of the U, V, and W phases; It consists of a stator support molded into an annular shape by insert molding using a thermosetting resin, except for the inner and outer surfaces of each split core of the split stator core assembly having coils wound around the plurality of bobbins.

The motor is preferably made of a thickness of 25mm or less.

The rotor support may include a trench forming portion surrounding a periphery of the inner rotor and the outer rotor and forming a trench groove in which a tip of the stator is inserted between the inner rotor and the outer rotor, and a predetermined length from the trench forming portion toward the center of the rotor. After extending in a straight line, the inclined connection portion is formed in two stages bent toward the center of gravity of the rotor, and a bushing support portion for supporting the bushings inside the tip portion of the inclined connection portion is connected to the outer peripheral portion.

Therefore, in the present invention, by injection molding a plurality of split core assemblies using a thermosetting resin in an insert molding method, a plurality of split cores can be assembled without using a separate core support plate, thereby greatly increasing the assembly productivity of the stator.

In addition, the present invention promotes stable motor driving by minimizing the axial height of a motor suitable for installation in a built-in drum washing machine with a narrow motor employing space, and is suitable for a drum washing machine operating in a quick reverse method with high torque. To provide the effect of driving the motor.

In addition, the present invention provides an effect that can be applied even if the inclination angle of the inclined drum washing machine is minimized because the axial height of the motor is minimized.

1 is a schematic view showing a conventional direct drum washing machine,
2 is a cross-sectional view of a motor incorporating a plurality of split core assemblies into a core support plate;
3 is a cross-sectional view taken along the axial direction of a slim motor according to an embodiment of the present invention;
4 is a perspective view of a split stator core used in a slim motor according to the present invention;
5A and 5B are side and cross-sectional views of the split stator core of FIG. 4;
6 is a perspective view for explaining the fastening state of the split type stator core of FIG.
FIG. 7 is a perspective view of the completed split stator core assembly in which the split stator core of FIG. 4 is annularly assembled; FIG.
8 is a perspective view for explaining a terminal assembly holder disposed on the completed split stator core assembly;
FIG. 9 is a conceptual view illustrating a coil winding, a layout, and a connection state of a three-phase driving method for the split stator core assembly of FIG. 8; FIG.
10A is a reference diagram for explaining a U-phase terminal assembled to the terminal assembly holder of FIG. 8;
10B is a reference diagram for explaining a common terminal assembled to the terminal assembly holder of FIG. 8;
11A to 11C are a perspective view, a bottom view and a plan view of a stator on a slim motor according to the present invention, respectively;
12A to 12C are respectively a perspective view, a bottom view and a plan view of a rotor in a slim motor according to the present invention.

The present invention provides a slim-type motor having a thickness (or height) of about 25 mm or less so as to be suitable for use in a narrow motor installation space in a built-in type direct drive device for a medium / small drum washing machine or another device requiring a motor. It is about.

In the slim motor of the present invention, first, the slim structure and the high driving torque suitable for the quick reverse type driving of the drum washing machine are shown, and considering the coil winding workability by the complete division of the stator core, The double rotor structure was not employed in size, and as a result, the magnetic circuit of the motor was defined as a double rotor / single stator structure circulating "inner rotor-division core-external rotor-adjacent split core".

In addition, the stator performs a winding operation between the split core assembly in which coils are wound for each phase by continuously winding coil windings for a plurality of split cores for each phase (U, V, and W) in order to slim the thickness direction. Omitted, pre-assembly between adjacent split core assemblies for molding with a thermosetting resin was used to avoid the use of any assembly PCB or support required for assembly of the split cores by using snap coupling between bobbins.

In general, as the number of poles of the motor increases as in the present invention, the rotation speed (rpm) is lowered (a drum washing machine does not require a high rpm), but a coil can be wound around each stator core.

In view of this, the present invention contemplates that the coil between adjacent split cores may be increased by increasing the diameter of the motor and increasing the number of slots and poles of the stator and rotor to minimize the height of the terminal block for powering the stator. Slimming was achieved by disposing a terminal assembly holder and a terminal housing for connecting the three-phase coil terminal with the power supply terminal block in the space between the cores secured by lowering the spot ratio.

Furthermore, in the present invention, the bushing of the rotor coupled to the rotating shaft and the inner extension of the stator coupled to the tub are disposed on the center of gravity of the motor and its circumference to prevent the thickness from increasing in the axial direction of the motor.

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

A. Motor overall structure

3 is a cross-sectional view taken along an axial direction of a slim motor according to an embodiment of the present invention.

Referring to Figure 3, the slim motor 1 is installed on the back of the built-in medium / small drum washing machine can be used to drive the drum or washing tub of the washing machine in the forward / reverse direction, and also other equipment other than the washing machine Applicable to

The slim type motor 1 according to the present invention is a reduced stator manufactured by insert molding using a thermosetting resin after the coil 59 is wound around the bobbin, in which a plurality of split type stator cores 51 are not shown. A stator 50 integrally formed by the support body 52; An inner rotor 60a having a predetermined magnetic gap in the inner and outer peripheral portions of the stator 50 and a plurality of magnets 63 and a ring-shaped inner yoke 64 are disposed in a reducing manner. The outer rotor 60b, in which the magnet 62 and the ring-shaped outer yoke 61 are disposed, and one end of the inner rotor 60a and the outer rotor 60b are connected to each other and extend to the center of the bushing and A rotor 60 formed of a rotor support frame 65 coupled thereto; In the center of the rotor 60, for example, it is coupled to the rotor 60 through an involute serration bushing 67, fixedly connected by a fixing nut 75, and the other end of the back of the tub 40. The rotary shaft 70 is rotatably supported through at least a pair of bearings 71 and 73 provided in the shaft.

The stator 50 has a plurality of fully divided split stator cores 51 are integrally molded by the reduced stator support 52 into a reduced type, and the stator support 52 extends inward to form a washing machine. The tub 40 is supported by the fixing bolt 41. In this case, the bearings 71 and 73 rotatably support the double rotor 60 coupled to the rotary shaft 70 through the bushing 67. The front end of the rotary shaft 70 extends into the tub 40 of the washing machine so that the basket 30 is fixedly coupled, and thus the basket 30 rotates in conjunction with the rotation of the rotary shaft 70.

Here, when used as a drive for a large-capacity washing machine, for example, it is designed in a 27-24 pole or 36 pole structure, the slim type motor 1 according to the present invention has a diameter of the motor in order to lower the spot ratio of the coil to the stator And increase the number of magnets in the stator core and rotor by designing a 36 slot-48 pole structure.

Accordingly, the inner rotor 60a and the outer rotor 60b of the double rotor 60 may be formed on the outer and inner surfaces of the inner and outer yokes 64 and 61 having 48 magnets 63 and 62 annular, respectively. The integrated stator 50 including 36 divided stator cores 51 is inserted in the annular space between the double rotors 60.

The slim motor 1 according to the present invention increases the diameter of the motor relatively large in order to lower the droplet rate of the coil relative to the stator, and thus, for example, is designed in a 36 slot-48 pole structure. In addition, it has a structure that increases the number of magnets of the stator core and the rotor.

Therefore, the motor 1 is a radial core type motor composed of a double rotor 60 and a single stator 50 in which the inner rotor 60a and the outer rotor 60b are supported by the rotor support frame 65. Forming.

B. Stator Structure and Manufacturing Process

4 is a perspective view of a split stator core used in a slim motor according to the present invention, and FIGS. 5A and 5B are front and cross-sectional views of the split stator core of FIG. 4.

4 and 5, the split stator core 51 has a coil (not shown) on the outer circumference of the bobbin 54 in a state in which an insulating bobbin 54 is formed integrally with the split core 53. ) Is assembled into an annular shape, and then the outer surface is molded with a thermosetting resin by an insert molding method to obtain an annular integrated stator 50. Cu is generally used as a material of the coil, but in order to reduce the weight of the motor, specific gravity is 1/3, and it is also possible to use Al, which is relatively inexpensive. Generally, Al is difficult to apply as a motor coil due to an oxidation problem, but in the present invention, the coil is wound around the stator core assembly using a thermosetting resin, so that the oxidation problem does not occur.

In addition, the split core 53 is formed by stacking a plurality of silicon steel sheets in order to prevent loss of magnetic flux due to eddy current that may occur when the motor rotates, or soft magnetic material having high permeability and high permeability. Soft magnetic compounds can be sintered and used.

The type I bobbin 54 is composed of a square barrel portion in the middle portion of which the coil is wound, and inner and outer flanges 54a and 54b which are bent and extended on the inner and outer sides of the square barrel portion, respectively, and these flanges 54a. 54b) is a space in which the coil can be wound. Here, the inner and outer flanges 54a, 54b of the bobbin 54 should preferably have the outer flange 54b formed relatively larger than the inner flange 54a.

Split stator core 51 has a coupling groove (A) and the engaging projection (B) formed in the vertical direction on both sides for the coupling between the inner circumferential surface of the inner flange (54a) to be assembled later annular, the outer flange ( 54b) outer peripheral surface is formed to abut each other, the circumference forming surfaces (C). In addition, first and second coupling protrusions D for assembling the terminal assembly holder 80 (refer to FIG. 7) are provided below the inner and outer flanges 54a and 54b of the bobbin 54.

FIG. 5A shows the front of the split stator core 51, and a cross-sectional view taken along the line B-B in FIG. 5A is shown in FIG. 5B.

Referring to FIG. 5B, it can be seen that the I-type split core 53 inserted into the split stator core 51 is formed, and the bobbin 54 is formed along the outer circumference of the core. The bobbin 54 has a coupling groove A and a coupling protrusion B formed in the inner flange 54a, and a circumferential forming surface C is formed in the outer flange 54b.

The assembly between the I-type split core 53 and the bobbin 54 is preferably integrally molded by an insert molding method using a thermosetting resin, but is not limited thereto and may be assembled by other well-known methods.

A method of manufacturing the annular unitary stator 50 by assembling each of the divided stator cores 51 will be described below.

FIG. 6 is a perspective view illustrating a fastening state of the split stator core of FIG. 4, and FIG. 7 is a perspective view of a completed split stator core assembly in which the split stator core of FIG. 4 is annularly assembled.

Hereinafter, for convenience of description, a coil is not wound around each of the split stator cores. However, when the stator 50 is manufactured by insert molding, a three-phase (U-phase, V-phase, W-phase) coil is used. It is obvious that this must be wound. A three-phase coil and its connection will be described below with reference to FIG. 9.

6 and 7, the bobbin 54 of each split stator core 51 has a coupling groove A formed at one side of the inner flange 54a, and a coupling protrusion B formed at the other side. The outer flange 54b has a circumferential forming surface C formed thereon. Each split stator core 51 has an inner circumferential surface as the engaging groove A of the split stator core 51 'adjacent to its engaging protrusion B is coupled, and when the inner circumferential surfaces are coupled, two splits are provided. The circumferential forming surfaces C of the mold stator cores 51 and 51 'abut each other to form an outer circumferential surface.

When the coupling grooves A and the coupling protrusions B of the respective divided stator cores 51 bobbin 54 are continuously interconnected, the divided stator core assembly 2 is completed as shown in FIG. 7.

Referring to FIG. 7, the inner circumferential surface is coupled to each split type stator core 51 by the coupling groove A on one side and the coupling protrusion B on the other side, and the outer circumferential surface is formed by contacting the circumference forming surface C. The bottom view of the state in which the annular split stator core assembly 2 is formed is shown in perspective view.

A terminal assembly holder 80 for connecting the coil is coupled to a portion of the bottom surface of the split stator core assembly 2. The first and second coupling protrusions D provided at both ends of the inner circumferential surface and the lower circumferential surface of the split stator core 51 are coupled to the coupling hole 85 of the terminal assembly holder 80.

FIG. 8 is a perspective view illustrating a terminal assembly holder disposed on the completed split stator core assembly, and FIG. 9 is a view illustrating a state in which a coil is wound around the split stator core assembly of FIG. 8 and drawn out to the terminal assembly holder. This is a conceptual diagram.

First, referring to FIG. 8, the terminal assembly holder 80 includes a plurality of coupling holes 85 for engaging with the split stator core assembly 2. In addition, the terminal assembly holder 80 includes a U-phase terminal housing 81 for connecting the U-phase terminal of the U-phase coil 59a wound around the split stator core assembly 2 with the first lead wire, and the split stator. V-phase terminal housing 82 for connecting the V-phase terminal of the V-phase coil 59b wound on the core assembly 2 with the lead wire, and the W-phase coil 59c wound on the split stator core assembly 2. Common terminal housing (83) for connecting the W-phase terminal housing (83) for connecting the W-phase terminal of the terminal to the lead wire and the coils (59a-59c) of the 3-phase (U-phase, V-phase, W-phase) 84). Each housing 81, 82, 83, 84 of the terminal assembly holder 80 configured as described above is disposed between each of the split stator cores 51 when connected to the split stator core assembly 2, and thus, a slim motor. (1) can be manufactured to minimize the height of the motor (1).

Hereinafter, a method of manufacturing the stator 50 will be described with reference to FIGS. 7 to 10.

In the present invention, when the stator 50 is a three-phase driving method, the coil windings for the plurality of split stator cores 51 ', 51 ", and 51"' are continuously wound for each phase (U, V, W). do. When the magnetic circuit of the motor consists of, for example, 36 slots-48 poles, each of the U, V, and W phases is provided with coils 59a-59c in each of the 12 divided stator cores 51 ', 51 ", 51"'. By winding continuously, the wiring work between the divided stator cores in which coils are wound for each phase can be omitted.

Subsequently, 36 divided stator cores 51 ', 51 ", 51"' wound with coils are alternately arranged for each of U, V, and W phases as shown in FIG. 9, and adjacent divided stator cores 51 'are disposed. , 51 ", 51 " 'are continuously connected to the coupling groove A and the coupling protrusion B of the bobbin 54 as shown in FIG.

Thereafter, the first and second coupling protrusions D provided at both ends of the inner circumferential surface and the lower circumferential surface of the split stator core 51 are engaged with the coupling holes 85 of the terminal assembly holder 80. A terminal assembly holder 80 for connecting the coils 59a-59c to a portion of the bottom surface of the core assembly 2 is coupled as shown in FIGS. 7 and 8.

Subsequently, one terminal of the three coils 59a-59c, which are sequentially wound on 12 divided stator cores 51 ', 51 ", 51"' for each phase, is connected to the wire holder using the terminal housing 81-83. Connect the U, V, and W lead wires to the 57, and the other terminal of the three coils 59a-59c has a common terminal COMMON so that the U, V, and W phases are connected to each other to form a neutral point NP. It is connected to the inserted common terminal housing 84.

Hereinafter, a method of assembling one terminal and the other terminal of the three-phase (U, V, W) coil with each housing will be described in more detail with reference to FIG. 10.

10A is a reference diagram for explaining a U-phase terminal assembled to a U-phase terminal housing in a terminal assembly holder.

Referring to FIG. 10A, the U-phase coil 59a drawn out in FIG. 9 is inserted before the U-phase terminal housing 81. Then, the mat mate terminal 81a is inserted into the groove provided in the upper portion of the U-phase terminal housing 81, and the unnecessary U-phase coil is cut. The poke-in terminal 81b to which the U-phase lead is connected is inserted into the mate terminal 81a and connected thereto. The V-phase coil 59b and the W-phase coil by inserting and processing the V-phase coil 59b and the W-phase coil 59c into the terminal housings 82 and 83 in the same manner for the V-phase terminal and the W-phase terminal, respectively. The V-phase and W-phase lead wires are respectively connected to 59c.

FIG. 10B is a reference diagram for explaining a method of forming the neutral point NP using the common terminal housing installed in the terminal assembly holder.

Referring to FIG. 10B, the other terminals of the three-phase coils 59a to 59c drawn in FIG. 9 are inserted before the three insertion grooves formed in the common terminal housing 84. Then, when the common mat for mat mate 84a is inserted into the common terminal housing 84, the other terminals of the three coils 59a to 59c are interconnected by the conductors for the mat mate 84a to form a neutral point NP. do.

When the terminal processing of the coils 59a-59c using the terminal assembly holder 80 and the housings 81-84 is performed, as shown in FIG. 8, the connection of the divided stator core assembly 2 is divided into the respective divided stator cores. Since the stator is formed on the terminal assembly holder 80 inserted between the 51 can achieve a slim structure.

As described above, the divided stator core assembly 2 having completed the connection is completed molding the stator support 52 by insert molding. This will be described below with reference to FIG. 11.

11A and 11B and 11C are a perspective view, a bottom view, and a plan view of a stator for use in a slim motor according to the present invention.

11A to 11C, the stator 50 has a plurality of split stator cores 51 insert molded into the split stator core assembly 2 along an annular outer circumference, and at the bottom thereof, a tub ( A stator support 52 having a plurality of stud nuts 55 fastened to the fixing bolts (41 of FIG. 3) to be coupled to 40 is formed to extend inwardly.

In this case, the inner extension 52a of the stator support 52 coupled to the tub 40 is bent in two stages to face inward of the annular stator 50 so as to prevent the stator from increasing in thickness in the axial direction. As a result, the distal end portion of the inner extension portion 52a is arranged to form a concentric circle with the bushing 67 that is coupled to the rotation shaft 70 of the rotor 60 to be described later. In addition, a plurality of stud nuts 55 coupled to the tub 40 are disposed at an interval in the inner extension portion 52a, and a plurality of fattening grooves 56 are disposed between the plurality of stud nuts 55. .

In addition, a wire holder 57 is provided on the outer circumferential surface to draw out each terminal connected from the terminal assembly holder 80 to the outside, and in the vicinity of the coil of the stator 50 of the three-phase driving method. A Hall IC assembly 58 is formed which generates a position signal for detecting the position of the rotor 60 being rotated to control the current supply.

The insert molding is a space between each divided stator core assembly 2 except for the divided core 53 exposed to the outside of each split stator core 51 by a bulk molding compound (BMC), and the upper and lower parts. Molding so as to cover the wound coil portion and bobbin 54 yields a reduced unitary stator 50.

In addition to the insert molding BMC, other thermosetting resins may be used.

C. Rotor Structure and Manufacturing Process

12A, 12B, and 12C are a perspective view, a bottom view, and a plan view of a rotor employed in the slim motor of the present invention.

12A to 12C, the rotor 60 is disposed on the injection molding mold such that the rotary shaft fastening bushing 67 is positioned at an approximately center of gravity of the inner rotor 60a and the outer rotor 60b. It is prepared by insert molding with a thermosetting resin, for example Bulk Molding Compound (BMC).

The inner rotor 60a and the outer rotor 60b are thermosetting so as to maintain a plurality of magnets 63 and 62 disposed on the ring-shaped yokes 61 and 64, respectively, as described in the cross-sectional view of FIG. It is connected by the rotor support 65 made of resin, and as a result, a trench type groove 65a is formed between the inner rotor 60a and the outer rotor 60b into which the front end portion of the stator 50 is inserted.

In addition, the rotor support 65 extends linearly therefrom toward the center by a predetermined length, and then through the inclined connection 69 formed in two steps toward the center of gravity of the rotor 60, the front end portion of the bushing 67 Is integrally connected with a bushing support portion 68 for supporting < RTI ID = 0.0 > As a result, the rotor 60 has a slim structure that prevents the thickness from increasing in the axial direction while minimizing vibration generated when the rotor 60 rotates.

Therefore, the rotor support 65 is the outer periphery of the upper and lower surfaces and the ring-shaped yokes 61 and 64 except for the opposing surfaces of the plurality of magnets 63 and 62 in the inner rotor 60a and the outer rotor 60b. A trench forming portion 65b for forming a trench-shaped groove 65a into which a tip end portion of the stator 50 is inserted between the inner rotor 60a and the outer rotor 60b, and from the trench forming portion 65b. After extending in a straight line by a predetermined length toward the center of the rotor, the inclined connection 69 is formed in two stages bent toward the center of gravity of the rotor 60, and the bushing 67 therein to support the inclined connection 69 The tip portion includes a bushing support portion 68 connected to the outer circumference portion, which are integrally formed by a thermosetting resin.

Bushing 67 located in the center of the rotor support 65 is provided with a serration structure on the inner periphery and coupled with the rotation shaft 70 to effectively transmit the rotational force to the rotation shaft 70 at the time of rotor rotation, FIGS. As shown in FIG. 12B, opposite opposing inner circumferential surfaces may be coupled to the rotating shaft 70 (see FIG. 3) through a bushing 67 having a rotating shaft fastening hole 67a having a curved inner circumferential surface between parallel and parallel inner circumferential surfaces. In this case, the rotating shaft 70 is also machined to have an outer circumferential surface corresponding to the rotating shaft fastening hole 67a of the bushing 67.

Referring to FIG. 3, the double rotor 60 alternately arranges a plurality of magnets 63 divided and magnetized into N and S poles on the outside of the reduced inner yoke 64 by using an adhesive. A rotor 60a is formed, and a plurality of magnets 62 divided and magnetized into N and S poles are alternately arranged using an adhesive, respectively, inside the reduced outer yoke 61 to form the outer rotor 60b. Form. In this case, between the opposing magnets of the inner rotor 60a and the outer rotor 60b, for example, they are arranged to have opposite polarities to each other.

In addition, the magnets of the inner rotor (60a) and the outer rotor (60b) may be integrated into an internal shape that can be fixed to the magnet position on the mold without a separate bonding process.

When the insert molding, the inner rotor (60a) and the outer rotor (60b) is molded in an annular shape of the outer surface except for the opposite surface of the magnet facing each other. In this case, a plurality of through holes 66 are formed in the trench grooves 65a of the rotor support 65 to serve as air circulation passages through which the outside air flows to both the inside and outside of the magnetic rotors 60a and 60b. It is desirable to. As a result, the through hole 66 transmits the outside air to the magnets and stator 50 of the inner rotor 60a and the outer rotor 60b when the rotor 60 is rotated to improve the cooling performance.

In addition, since the rotor 60 of the present invention has a plurality of magnets 63 and 62 of the inner rotor 60a and the outer rotor 60b arranged concentrically by insert molding, the roundness is high and assembled with the stator 50. It is possible to maintain a uniform magnetic gap.

Therefore, as described above, in the present invention, the rotor 60 and the stator 50 are each designed to be slim, and by combining them, the overall thickness (that is, the height) of the motor 1 can be reduced. The motor thickness of the embodiment can be manufactured to 25mm or less.

In addition, in the present invention, in order to improve the coil winding workability, while the core of the stator 50 is made of a fully divided core, the double rotor 60 is employed to improve the efficiency of the magnetic circuit.

Furthermore, in the present invention, the core is designed by designing the magnetic circuit in such a way that the number of slots (i.e. split cores) and poles (i.e. magnets) is increased in such a way as to increase the diameter of the rotor and stator without reducing the size of the magnet. Lowers the spot ratio of the coil between the core and the core, and consequently the terminal assembly holder 80 and the housing 81 which are required to draw out from the three-phase coil terminal to the outside through the wire holder 57 in the space between the split core and the split core. -84) is arranged to perform the terminal processing of the coils 59a-59c, and the continuous winding method is applied to the divided cores of each phase to remove the wiring of the coils between the divided cores, thereby implementing a stator with a slim structure.

In addition, in the present invention, despite the slim structure, the number of slots (ie, split cores) and poles (ie, magnets) is increased by increasing the diameter of the rotor and stator without reducing the size of the magnet and the split core. By implementing a rotor / single stator structure, the motor efficiency and torque can be further increased compared to a motor of a general large capacity single rotor / single stator.

As a result, in the case of a typical single rotor / single stator structure, the maximum torque is 32 Nm and the motor efficiency is about 27.6%. However, in the present invention, a slim structure and high driving torque (maximum torque: 42 Nm) and high efficiency are provided. (44%), and therefore, the slim motor of the present invention has a torque sufficient for driving a quick reverse type of a drum washing machine.

In addition, in the present invention, it is possible to provide a slim motor having a thickness (or height) of about 25 mm or less, and is adopted in a given motor installation space inside a built-in medium / small drum washing machine and directly connected to a tub. A direct drive (DD) for rotating the basket can be implemented.

In addition, since the split stator core 51 has a small size, the waste ratio of the silicon steel sheet is smaller than that of the integrated stator core structure, so that there is almost no material loss, the shape is simplified, and the manufacturing is easy, and the split stator core 51 It is possible to wind the windings using a general-purpose winding machine, thereby reducing the coil winding cost and the investment in the winding equipment.

In addition, the embodiment of the rotor and the stator are all integrally formed using a resin, so it is excellent in durability, moisture resistance, etc., but is suitable as a drum driving source for a washing machine used in a high humidity environment, but is not limited thereto. Deformation is possible depending on the device to which it is applied.

The present invention can provide a slim motor having a thickness (or height) of about 25 mm or less, and can be applied to a built-in direct drive (DD) for a medium / small drum washing machine.

In addition, the present invention can be applied to a built-in medium / small drum washing machine as well as a large capacity washing machine for a direct drive (DD) for a drum washing machine.

1: slim motor 30: basket
40: Tub 50: Stator
60: rotor 70: rotation axis
80: terminal assembly holder

Claims (17)

In the direct drive of the drum washing machine,
A rotating shaft rotatably mounted to the tub of the drum washing machine and having a basket coupled to the front end thereof;
A rotor support extending from the inner and outer rotors, in which a plurality of N-pole and S-pole magnets are alternately arranged in a reduced phase, respectively, and one end of the inner and outer rotors, and an inner circumference extending to a bushing coupled with the rotating shaft. A double rotor having a;
A plurality of bobbins each having a coupling protrusion and a coupling groove at both side ends of the first flange disposed inwardly and having coil winding grooves between the first and second flanges formed on the inner and outer sides surrounding each intermediate portion, respectively It has a plurality of split cores formed on the outer periphery, and is assembled in an annular shape by mutually coupling the coupling groove and the coupling protrusion between adjacent split core bobbins, and each phase coil is continuously connected to the plurality of bobbins. And an integrated stator of which a stator support is formed on an outer circumference thereof to integrate the divided core assembly wound alternately. In the direct drive of the drum washing machine,
A rotating shaft rotatably mounted to the tub of the drum washing machine and having a basket coupled to the front end thereof;
The inner and outer rotors, each of which has a plurality of N-pole and S-pole magnets alternately arranged in a reduced phase on different concentric circles, and one end of the inner and outer rotors are connected to each other, and an inner circumference is located at the center of gravity of the rotor. A double rotor having a rotor support extending in a bushing coupled to the rotation shaft;
A stator disposed between the inner and outer rotors and having a coil wound core including an stator supported in an annular shape by a stator support;
The stator support is directly connected to the drum washing machine, characterized in that the front end is bent so as to be fixed to the tub engaging portion of the drum washing machine protruding into the center of the stator has an inner extension extending in the center direction from the outside of the stator. . The direct type driving device of the drum washing machine according to claim 2, wherein the inner extension of the stator support is disposed concentrically with the bushing. According to claim 1, wherein the coil is disposed between a plurality of divided cores wound around each phase terminal housing used to connect the one side coil terminal of each phase coil and the respective phase lead for external drawing and the other coil of each phase coil And a terminal assembly holder having a common terminal housing used to connect the terminals to form a neutral point. The method of claim 4, wherein the bobbin further comprises a first and a second coupling protrusion in the center of the lower end of the first and second flange, respectively,
The terminal assembly holder further comprises a coupling hole coupled to and fixed to the first and second coupling protrusions. The direct type drive device of a drum washing machine according to claim 4, wherein the terminal housings and the common terminal housings of the terminal assembly holder are disposed one by one between the split cores. The method of claim 1 or 2, wherein the stator is
A plurality of split cores;
A split core having first and second flanges formed on one side and the other side, respectively, formed on an outer periphery of each of the plurality of split cores, and adjacent through a coupling groove and a coupling groove provided on each side end of any one of the flanges; A plurality of bobbins that combine to form an annular split core assembly;
Coils for each phase continuously wound on bobbins of each phase alternately arranged for each phase;
And a stator support for integrally molding the split core assembly having the coil wound around the plurality of bobbins by insert molding using a thermosetting resin. The rotor support according to claim 1 or 2, wherein the rotor support is
A trench forming portion surrounding the outer circumference of the inner rotor and the outer rotor and forming a trench groove in which the tip of the stator is inserted between the inner rotor and the outer rotor;
An inclined connection portion extending straight from the trench forming portion toward the center of the rotor by a predetermined length and then bending in two steps toward the center of gravity of the rotor;
A direct type drive device for a drum washing machine comprising a bushing support part supporting a bushing therein and having a distal end portion connected to an outer circumferential part thereof. A rotating shaft rotatably mounted to the housing of the device, the rotating shaft being coupled and fixed to the front end portion;
The inner and outer rotors, each of which has a plurality of N-pole and S-pole magnets alternately arranged in a reduced phase, and one end of the inner and outer rotors are connected to each other, and an inner circumference thereof is positioned at the center of gravity of the rotor and coupled to the rotating shaft. A double rotor having a rotor support extending in the bushing;
A coil is continuously and alternatingly wound for each phase in a plurality of split cores each having an integral bobbin integrally formed on an outer circumference thereof, and includes a stator assembled in an annular shape and integrated by a stator support.
The stator includes a terminal assembly holder disposed between a plurality of split cores each of which coils are wound, and having respective terminal housings connecting one coil terminal of each phase coil to each phase lead wire for external drawing. Slim motor. A rotating shaft rotatably mounted to the housing of the device, the rotating shaft being coupled and fixed to the front end portion;
Inner and outer rotors each having a plurality of N-pole and S-pole magnets alternately arranged in a reduced phase, and the magnets opposed to each other at a predetermined distance between inner and outer sides are arranged to have opposite polarities, and one end of the inner and outer rotors. A double rotor having a rotor support extending at a bushing coupled to the rotary shaft while the inner circumference thereof is positioned at the center of gravity of the rotor;
A stator disposed between the inner and outer rotors and having a coil wound core including an stator supported in an annular shape by a stator support;
The stator support is a slim motor, characterized in that it has an annular inner extension which is bent at its tip and extends from the outside of the stator toward the center to be disposed concentrically with the bushing and fixedly coupled to the housing of the device. The stator of claim 10, wherein the stator is a plurality of split cores each having an insulating bobbin integrally formed on an outer circumference thereof, and the split core assembly obtained by continuously and alternately winding each phase coil is assembled in an annular shape using a stator support. Slim motor characterized by. 12. The method of claim 11, wherein each phase coil is disposed between a plurality of divided cores wound around and used to connect one coil terminal of each phase coil to each phase lead wire for external drawing and the other side of each phase coil. And a terminal assembly holder having a common terminal housing used to interconnect the coil terminals to form a neutral point. The bobbin of claim 9 or 12, wherein the bobbin further comprises first and second coupling protrusions at lower ends of the first and second flanges, respectively.
The terminal assembly holder further comprises a coupling hole coupled to and fixed to the first and second coupling protrusions. The rotor support according to claim 9 or 10, wherein the rotor support is
A trench forming portion surrounding the outer circumference of the inner rotor and the outer rotor and forming a trench groove in which the tip of the stator is inserted between the inner rotor and the outer rotor;
An inclined connection portion extending straight from the trench forming portion toward the center of the rotor by a predetermined length and then bending in two steps toward the center of gravity of the rotor;
A slim type motor, comprising: a bushing support part configured to support a bushing therein and a front end of the inclined connection part connected to an outer circumferential part thereof. A rotating shaft rotatably mounted to the housing of the device, the rotating shaft being coupled and fixed to the front end portion;
A rotor having a rotor support in which a plurality of N-pole and S-pole magnets are alternately arranged in a reduced phase and whose inner circumference is located at the center of gravity of the rotor and extends in a bushing coupled to the rotating shaft;
It is disposed at intervals with the rotor, each of the coils are continuously and alternately wound in each phase in a plurality of divided cores integrally formed with an insulating bobbin on the outer periphery, and includes a stator integrated in an annular shape and integrated by a stator support,
The stator includes a terminal assembly holder disposed between a plurality of split cores each of which coils are wound, and having respective terminal housings connecting one coil terminal of each phase coil to each phase lead wire for external drawing. Slim motor. The slim type motor according to claim 15, wherein the rotating shaft is rotatably mounted on the tub of the drum washing machine and a basket is fixedly coupled to the front end thereof. The slim type motor according to any one of claims 9, 10 and 15, wherein the motor is applied to a direct drive of a drum washing machine.

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