KR100279846B1 - Noncommutator motor with controller - Google Patents

Abstract

The present invention relates to a controller integrated rectifier motor. In the related art, a low-efficiency flow motor was used to drive a fan for a refrigerator. This is because the bearing part is assembled by screwing, which is cumbersome and inconvenient. In addition, as the length of the axial direction is increased due to the bearing mounting structure, there is a closed end that is difficult to compact the device. In addition, since molding is not performed entirely, only the coil part of the stator is molded, and there is a problem of a lot of electric shock due to leakage current flowing through the stator core. Therefore, the present invention is a coil wound stator that is fixed without rotating inside the transmission main body; A rotor of a permanent magnet positioned in a central portion of the stator to generate torque and having a rotating shaft inserted therein; A controller connected to the circuit to control the operation while maintaining an interval in the axial direction with the stator; By configuring the hall sensor unit for detecting the position of the rotor, not only the simplicity and efficiency of the assembly can be determined, but also the productivity can be further improved, and the compactness of the device can be achieved. In addition, by forming the motor body by the overall molding process, the risk of electric shock due to leakage current can be prevented in advance.

Description

Controller-integrated non-commutator motors {NONCOMMUTATOR MOTOR WITH CONTROLLER}

The present invention relates to a controller-integrated rectifier motor that is used to drive a fan for a refrigerator.

As is well known, an electric motor is a machine that generates a rotational force by a current flowing between a magnetic force line caused by a magnetic field and a coil wound on the electric motor, and is conventionally a motor for driving a fan for a refrigerator. Died pole type induction motors have been used. However, the shaded pole type induction motor has the advantages of excellent productivity and low price, while being inefficient and inadequate in terms of power consumption of the refrigerator, the application of a non-rectifier motor is being promoted in recent years. Looking at the configuration of the flow motor of the as shown in Figures 1 and 2. That is, the induction motor has a rotor (2) in which a rotating shaft (2A) is inserted and generates a torque inside the transmission main body (1), a stator (3) wound around a coil (3A) fixed without rotation, and It is composed of a bearing (4) (4A) for rotatably supporting the shaft (2A) of the rotor (2), the outside of the transmission main body (1) is drawn out from the transmission main body 1 as a signal line (5A) A controller (not shown) that is connected to the connector 5 to control each of the above operations is provided. In addition, the transmission main body 1 is composed of a load side bearing portion 6 in which the bearings 4 and 4A are accommodated, and a half load side bearing portion 6A, and the load side and half load side bearing portions 6A. 6A has a structure in which a plurality of plate-shaped stator cores 3B are fixed to the stator 3 formed with a plurality of sheets, and fastening holes (not shown) are provided in the stator cores 3B. And a fixing piece 8 having fixing holes 8A formed at both sides of the load side and the half load side bearing parts 6 and 6A. The fastening hole of the fixing hole 8A and the stator core 3B is provided. The screw 7 is fastened in a mutually coincident manner. Here, the load side and the half load side are referred to as the load side on which the fan (not shown) is mounted on the shaft 2A of the rotor 2 and the load side is referred to as the half load side.

However, such a conventional induction motor is not only inferior in efficiency due to its characteristics, but also to assemble the bearing part by screwing as described above. There was a problem. In addition, in the screw fastening operation as described above, it is necessary to form a fastening hole for fixing the bearing part in the stator core, as well as the length of the axial direction becomes longer due to the mounting structure of the bearing, which makes it difficult to compact the device. And since the molding is not made entirely, only the coil part of the stator is molded, there is a lot of problems that the electric shock due to the leakage current flowing through the stator core.

Therefore, an object of the present invention is to simplify assembly, improve productivity, and to reduce the overall volume while being electrically safe.

1 is a cross-sectional view showing the internal configuration of a conventional induction motor.

2 is a front view of FIG. 1;

Figure 3 is a cross-sectional view showing the internal configuration of the present invention.

4 is a front view of FIG. 3.

5 is a cross-sectional view showing a rotor structure of the present invention.

Fig. 6 is a sectional view along the “A” portion of Fig. 5.

7 is a front view showing the stator structure of the present invention.

8 is a perspective view of a portion “B” of FIG. 7.

9 is a side view of FIG. 7;

10 is a front view showing a printed circuit board structure of the present invention.

Figure 11 is a perspective view showing the structure of the hall sensor unit of the present invention.

12 is a perspective view showing the structure of the sensor guide sphere of the present invention.

** description of the symbols for the main parts of the drawings **

10: motor basic body 20: rotor

21: Axis 22: Permanent magnet

22A: over-hang 23,23A: bearing

30: Stator 31: Stator Core

32: Tees 33: Coil

34: connection pin 35: stop pin

35A: Step 40: Controller

40A: Printed circuit board 41: Connection hole

42: insertion hole 43: center hole

44: sensor soldering 45: fixed hole

50: Hall sensor 51: Hall element

51A: Body 51B: Sensing surface

51C: leg 52: sensor connection

52A: Fixed hook 52B, 52C: Fixed piece

52D: Jam Jaw 53: Sensor Support

54: Short circuit prevention groove

In order to achieve the object of the present invention, a coil is wound around the stator, which is fixed without being rotated inside the motor body; A cylindrical support portion having an axial insertion hole positioned in a central portion of the stator to generate a torque and rotating therein, a cylindrical effective portion formed at a thickness greater than an axial thickness of the support portion and spaced from the support portion; And a rotor of a permanent magnet serving as a disc-shaped connecting portion interconnecting the support portion and the effective portion with a thickness smaller than the axial thickness of the support portion. A controller connected to the circuit to control the operation while maintaining an interval in the axial direction with the stator; There is provided a controller-integrated non-commutator motor, characterized in that consisting of a Hall sensor for sensing the position of the rotor.

Connection or support portion of the permanent magnet is characterized in that the magnetizing guide hole is formed for magnetization and demagnetization.

It is characterized in that the overhang is formed long on one side of the effective portion of the permanent magnet.

The stator is formed by overlapping a plurality of stator cores having several teeth formed at equal intervals along the inner periphery of the circular yoke part at equal intervals, and winding a coil around the overlapped teeth.

In order to connect the stator to the printed circuit board, a plurality of connection pins, one end of which is fixed to the stator with resin and soldered with a start line and an end line of a coil wound on a tooth, are formed on the stator to form the circuit board. It is characterized in that it is inserted into the connection hole formed in the solder fixed.

The stator restricts the insertion of the printed circuit board of the connecting pin so that the printed circuit board and the stator are integrally formed with a stop pin having a stepped portion at the distal end so that the printed circuit board and the stator can be maintained at a predetermined interval. It is characterized by one.

The hall sensor unit comprises a Hall element soldered and fixed to several places of the printed circuit board, a sensor connection unit interconnecting the Hall element by insert injection molding, and means for fixing the sensor connection unit to the printed circuit board. do.

The fixing means may be integrally formed with several fixing hooks protruding in the opposite direction to the hall element in the sensor connection portion, so that the fixing means can be fixed to several fixing holes formed through the central hole of the printed circuit board. do.

And means for guiding and supporting the hall element on one side of the end of the stator toward the printed circuit board is molded with a thin insulating resin integrally with the stator.

The guide and the support means of the Hall element is characterized in that the sensor guide having a sensor insertion groove is formed integrally on one side of the teeth end of the stator.

Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings.

Figure 3 is a cross-sectional view showing the internal configuration of the present invention, Figure 4 is a front view of Figure 3, Figure 5 is a cross-sectional view showing a rotor structure of the present invention, Figure 6 is a "A" sub-axis cross-sectional view of Figure 5, Figure 7 is Front view showing the stator structure of the present invention, Figure 8 is a perspective view of the "B" part of Figure 7, Figure 9 is a side view of Figure 7, Figure 10 is a front view showing a printed circuit board structure of the present invention, Figure 11 is the present invention 12 is a perspective view showing the structure of the hall sensor unit, Figure 12 is a perspective view showing the structure of the sensor guide sphere of the present invention.

The present invention is provided with a stator 30 that is fixed to the inside of the transmission main body 10 without rotation, as shown in Figure 3, the stator 30 is provided with a rotor 20 that rotates to generate a torque in the center The controller 40 is formed of a printed circuit board 40A to be connected to the stator 30 to control the operation.

The rotor 20 is injection molded together with the shaft 21 inserted into the plastic permanent magnet 22 as shown in FIG. 5, and the permanent magnet 22 has a circumference having the shaft insertion hole 42. 22A of the die | dye, cylindrical effective part 22B formed at intervals with the said support part 22A in thickness larger than the axial thickness of the said support part 22A, and more than the axial thickness of the said support part 22A. It consists of a disc-shaped connecting portion 22C for interconnecting the support portion 22A and the effective portion 22B with a small thickness, and a plurality of polarities are formed on the outer circumferential surface of the effective portion 22B. In addition, the connection part 22C or the support part 22A of the permanent magnet 22 magnetizes the magnet for magnetization in the non-magnetized state and magnetization guide for demagnetization to make the magnetized state unmagnetized. 22E is formed. In addition, the inner surface of the shaft insertion hole 42 of the permanent magnet 22, that is, the surface contacting the shaft 21 is chamfered or forms a protrusion (not shown), which causes the rotor 20 to expand by heat. When the contact between the shaft 21 and the shaft insertion hole 42 is opened to prevent the weakening of the binding force, as described above, by chamfering the contact surface or forming a protrusion, even when the rotor 20 is expanded by heat. It is configured to maintain the binding force of the shaft 21 and the rotor 20 continuously. In addition, as shown in FIG. 3, an overhang 22D is formed on one side of the effective portion 22B of the permanent magnet 22 so that the flux of the magnetic flux on the teeth 32 of the stator 30, which will be described later, is formed. It is configured to increase the gong effect and to detect the magnetic flux to be plunged by the Hall sensor unit 50 provided on one side of the end portion of the teeth 32 of the stator 30, the shaft 21 of the rotor 20 ) Is rotatably supported by the bearings 23 and 23A.

As shown in FIG. 7, the stator 30 is formed by stacking a plurality of stator cores 31 made of circular plates into a single body, and the stator core 31 has an inner circumference of the circular yoke portion 31A. Several teeth 32 are formed at equal intervals along the part toward the center, and coils 33 are wound around each of the overlapped teeth 32 as shown in FIG. Molded with a resin, wherein the molding surface is the upper and lower surfaces except for the outside and the inside of the stator (30). In addition, the upper and lower molding surfaces of the stator 30 are interconnected with an insulating resin so that the upper and lower molding surfaces of the stator 30 are not lifted.

In addition, as shown in FIG. 9, the stator 30 is provided with several connecting pins 34 to circuitally connect the printed circuit board 40A of the controller 40. 34 is a connection hole in which the start line and the end line of the coil 33 are soldered and fixed, and one side end is fixed by resin, and the connection pin 34 is inserted into and soldered to the printed circuit board 40A. 41) is formed. In addition, a number of stop pins 35 are formed in the stator 30 together with the connection pins 34, and an insertion hole 42 into which the stop pins 35 are inserted is formed in the printed circuit board 40A. At this time, the stepped portion 35A is formed at the tip of the stop pin 35 to limit the insertion of the connecting pin 34 and the stop pin 35 to thereby space the gap between the stator 30 and the printed circuit board 40A. It is configured to remain. One end surface of the stator 30, that is, a surface facing the printed circuit board 40A, is located at the center of the stator 30 to generate torque and sense the position of the rotating rotor 20 to detect the stator. The hall sensor unit 50 which sequentially flows current to the coil 33 of 30 is provided. The hall sensor unit 50 is continuously provided in several teeth 32 formed in the stator 30, and is formed of a hall element 51 soldered and fixed to the printed circuit board 40A. In addition, as shown in FIG. 11, the Hall element 51 is insert-molded together with the sensor connection part 52 made of an arc-shaped mold, and interconnected and supported, and the sensor connection part 52 is connected to the fixing means. Is fixed to the printed circuit board 40A. As a fixing means thereof, a plurality of square groove-shaped fixing holes 45 are formed at the same inner side of the central hole 43 of the printed circuit board 40A at equal intervals, and the sensor connection part ( 52, a fixed hook 52A is formed at a position corresponding to the fixing hole 45 of the printed circuit board 40A so as to protrude in the opposite direction to the hole element 51, and the printed circuit board 40A The fixing hole 45 of the) facilitates the flow of the resin, and the fixing hook 52A mutually has a pair of fixing pieces 52B and 52C having a locking jaw 52D to the outside of the tip portion to have its own elasticity. It is formed at intervals. The Hall element 51 is soldered and fixed to the printed circuit board 40A as described above. For this purpose, a sensor solder hole 44 is formed at several places of the printed circuit board 40A. In addition, the Hall element 51 is composed of a body 51A and a leg portion 51C, the "O" portion of the body 51A is a plurality of sensing surface (51B) for detecting the position of the rotor 20 Toward the outer circumferential surface of the rotor 20 having two polarities. In addition, the leg portion 51C of the Hall element 51 protrudes to one side of the sensor connection portion 52 made of a mold, and the portion thereof is later filled with resin to short-circuit the Hall element 51 due to moisture penetration. Short circuit preventing groove 53 is formed to prevent. Then, a sensor insert into which the Hall element 51 is inserted, as shown in FIG. 12, is disposed on one side (the side facing the printed circuit board) of the teeth 32 at which the Hall element 51 is located. The sensor guide tool 36 having the groove 36A is provided integrally. Reference numeral 53 is a sensor support.

In the present invention configured as described above, first, the fixing hook 52A formed to protrude to one side of the sensor connection part 52 is assembled to the fixing hole 45 formed in the printed circuit board 40A, wherein the sensor connection part And inserting the leg 51C of the hole element 51 interconnected with the injection molding 52 so as to be aligned with the sensor solder hole 44 of the printed circuit board 40A. 52 is fixed to the printed circuit board 40A by the fixing hook 52A. Then, after soldering the leg portion 51C of the hole element 51 inserted into the sensor solder hole 44 of the printed circuit board 40A, the hole element 51 is again replaced by the teeth of the stator 30. (32) It is inserted through the sensor insertion groove (36A) of the sensor guide (36) integrally provided at the end side, wherein the sensor guide (60A) is the hall element 51 the stator (30) The hole 32 is prevented from bending during the molding operation for forming the transmission main body 10 later while guiding to be accurately positioned at the end side of the tooth 32. And the electric base 10 is formed by a molding operation as the outside of the electric, wherein the resin is filled with a short-circuit prevention groove 53 formed in the sensor connection portion 52 for interconnecting the Hall element 51. The gap between the printed circuit board 40A and the sensor connection unit 52 is removed.

As described above, the present invention not only forms the bearing insertion grooves on both sides of the inner space where the rotor is located while molding the controller of the stator and the printed circuit board with resin, thereby providing convenience and efficiency in assembling, thereby improving productivity. It becomes possible to improve more, and also has the effect of making the apparatus compact. In addition, by forming the motor body by the overall molding process, the risk of electric shock due to leakage current can be prevented in advance.

Claims (10)

A stator wound around a coil which is fixed without being rotated inside the transmission basic body; A cylindrical support portion having an axial insertion hole positioned in a central portion of the stator to generate a torque and rotating therein, a cylindrical effective portion formed at a thickness greater than an axial thickness of the support portion and spaced from the support portion; And a rotor of a permanent magnet serving as a disc-shaped connecting portion interconnecting the support portion and the effective portion with a thickness smaller than the axial thickness of the support portion. A controller connected to the circuit to control the operation while maintaining an interval in the axial direction with the stator; Controller-integrated rectifier motor, characterized in that consisting of a Hall sensor for detecting the position of the rotor. The controller-integrated non-commutator motor according to claim 1, wherein a magnetization guide hole is formed at a connection part or a support part of the permanent magnet for magnetization and demagnetization. The controller-integrated non-commutator motor according to claim 1, wherein an overhang is formed long on one side of the effective portion of the permanent magnet. According to claim 1, wherein the stator is formed by overlapping a number of stator cores formed with several teeth at equal intervals along the inner periphery of the circular yoke portion toward the center, and winding the coil around the overlapped teeth Controller-integrated rectifier motor. The connecting pin according to claim 1 or 4, wherein one end of the connection pin is fixed to the stator by resin and the start and end lines of the coil wound on the tooth are soldered to connect the stator to the printed circuit board. The controller-integrated non-commutator motor, which is formed in the stator and inserted into a connection hole formed in the printed circuit board to be soldered and fixed. The printed circuit board of claim 5, wherein the stator is integrally formed with a stop pin having a stepped portion at a distal end portion of the stator so as to restrict the insertion of the printed circuit board of the connection pin so that the printed circuit board and the stator can maintain a constant distance. A controller-integrated non-commutator motor, characterized in that it is inserted into the insertion hole formed in the. The method of claim 1, wherein the Hall sensor unit is a Hall element soldered and fixed to several places of the printed circuit board, a sensor connection portion for interconnecting the Hall element by insert injection molding, and for fixing the sensor connection portion to the printed circuit board A controller-integrated rectifier motor, characterized in that composed of means. The method of claim 7, wherein the fixing means is integrally formed with a plurality of fixing hooks to protrude in the opposite direction to the hole element in the sensor connection portion to be fixed by the several fastening holes formed in communication with the central hole of the printed circuit board. A controller-integrated non-commutator motor characterized in that it is possible. According to claim 4 or 7, characterized in that the means for guiding and supporting the hole element on one side of the end of the stator toward the printed circuit board side molded with a thin insulating resin integrally with the stator. Controller-integrated rectifier motor. The controller-integrated rectifier motor according to claim 9, wherein the guide and support means of the hall element are integrally formed with a sensor guide having a sensor insertion groove on one side of the tooth end of the stator.