KR20030089546A - BLDC motor having flexible stator - Google Patents

Abstract

PURPOSE: A BLDC motor including a flexible stator is provided to reduce a manufacturing cost and minimize a damping loss by forming a basic framework of a stator with a flexible film and arranging a copper line on the flexible film. CONSTITUTION: A BLDC motor including a flexible stator includes a flexible film(200), a plurality of connection holes(400), a copper line(600), a hall sensor(700), a location line(800), and a combination line(900). The flexible film(200) has the constant length and is formed with a foil. The connection holes(400) are formed in a predetermined interval at an upper end and a lower end of the flexible film(200). The copper line(600) is formed on both sides of the flexible film(200) in order to connect continuously a stating point(500) to an ending point(510). The hall sensor(700) is formed at one side of a lower end portion of the flexible film(200) in order to sense the polarity of a magnet. The location line(800) and the combination line(900) are printed vertically to a projection section(300) formed on one side of an upper end of the flexible film(200).

Description

BLDC motor having flexible stator

The present invention relates to a BCD motor having a flexible stator, and in particular, the basic skeleton of the stator is formed of a thin sheet of flexible film, and the copper wire pattern is arranged on the film at regular intervals to form a phase. After this, it can be rolled into a cylindrical shape like the existing stator to be applied to BLDC (Brushless Direct Current) motors, which greatly reduces the manufacturing process during manufacturing, and significantly reduces the production cost. The present invention relates to a BCD motor having a flexible stator for minimizing the overall size and weight of the structure.

In general, the BLDC motor detects the N pole or the S pole of the rotating magnet of a stationary rotor by using a magnetic pole detection element such as a hall sensor in an initial stage, and transmits it as an input signal to a switching element such as a switching transistor. The coil is excited by the input signal to form a rotating magnetic field, which is configured to sequentially and repeatedly rotate the motor.

These BLDC motors can accurately control the rotation speed and rotation speed of the motor according to the amount of current applied to the coil, so that the maximum efficiency of the motor can be utilized. Therefore, fan driving motors such as refrigerators and air conditioners, video tape recorders and audio It is widely applied to drive sources such as deck drive sources, contact disc players or tape players, fast response, high precision robots, and small and medium factory automation devices and office automation devices.

However, the stator, which is the basic skeleton of the BLDC motor, is made of a cylindrical metal, and a coil is wound several times on the body as a means for rotating the rotor, and the slot is essentially slotted to facilitate the winding of the coil on the stator side. Is formed. This structure has a disadvantage in that the rotation of the motor is uneven because a non-uniform and discontinuous magnetic field is formed inside the motor by the slot when the motor rotates, and furthermore, the product is not only large in weight and enlarged by a metal stator and a slot. As a result, the manufacturing process is increased and the production cost is increased.

In addition, because a separate winding machine is used to wind the coil on the stator, manufacturing time and a lot of manpower have been mobilized, and even if the coil is wound on the stator, the coil winding arrangement intervals are uneven and the same output cannot be obtained, so high quality products can be expected. There were no problems.

Accordingly, an object of the present invention is to conceive in view of the above-described conventional problems, and the basic skeleton of the stator is formed of a thin flexible film, and the copper wire (coil) pattern is arranged on the film at regular intervals. After forming the phase, it can be rolled into a cylindrical shape like the existing stator shape and applied to BLDC motor, which greatly reduces the production process during manufacturing and minimizes the damping loss by arranging the coils at regular intervals. An object of the present invention is to provide a BCD motor having a flexible stator to enable a compact and lightweight structure.

1 is a front view of a stator film according to the present invention;

Figure 2 is a front view showing the position where the stator film is bonded in three phases according to the present invention;

Figure 3 is a front view showing a state in which the film of the stator is bonded in three phases according to the present invention,

Figure 4 is a plan view showing a state in which the stator is rolled into a cylindrical shape in accordance with the present invention.

(Explanation of symbols for the main parts of the drawing)

100; Stator 200; film

300; Protruding piece 400; Connection hole

500; Starting point 510; Endpoint

600; Copper wire 700; Hall sensor

800; Location line 900; Bond line

As a means for achieving the above object, the present invention is a flexible film having a predetermined length and formed into a thin plate,

A plurality of connection holes positioned at upper and lower ends of the film and formed in a plurality in a predetermined interval with a plurality of pairs;

A copper wire which forms an image while being wired to both sides of the film through the connecting hole so that the middle of the start point and the end point can be continuously connected without interruption;

A hall sensor formed on one side of the bottom of the film to detect a magnet pole;

It is a basic feature of the technical configuration that is composed of a position line and a coupling line printed perpendicular to the protrusion formed on one side of the film.

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

1 is a front view of a stator film according to the present invention, Figure 2 is a front view showing a position where the stator film is bonded in three phases according to the present invention, Figure 3 is a stator film according to the present invention bonded in three phases 4 is a plan view showing a state in which the stator according to the present invention is rolled into a cylindrical shape.

The BLDC motor of the present invention also detects the N pole or the S pole of the rotating magnet of the rotor which is stopped by using a magnetic pole detection element such as a hall sensor in the initial stage, and transmits it as an input signal to a switching element such as a switching transistor, The basic context in which the coil is excited by this input signal to form a rotating magnetic field is configured to perform sequential and repetitive motor rotational driving as in the prior art.

However, the present invention is to use the BLDC motor more effectively by changing the structure of the stator for rotating the rotor, which is a flexible film stator 100 is formed in a thin plate as shown in Figures 1 to 4 200 and the connection holes 400, which are respectively located at the upper and lower ends of the film 200, are formed in a plurality and arranged in a plurality in a set at a predetermined interval, and the middle of the start point 500 and the end point 510 may be continuously connected without interruption. Copper wire 600 to form an image while wiring to both sides of the film 200 through the connection holes 400 and the Hall sensor 700 formed on one side of the bottom of the film 200 to detect a magnet pole and the The film 200 is composed of a position line 800 and a bonding line 900 printed perpendicular to the protrusion 300 formed on one side of the top, the film is rolled in a cylindrical state in a plurality of laminated state stator It has a basic structure equipped to form.

Here, the connection holes 400 formed on the upper and lower ends of the film 200 are not limited to four parts formed as a set as shown in the drawing, and the copper wire 600 is connected to both sides of the film, and a plurality of films are stacked to form a three phase. If it is possible to form the stator 100 of the structure it will be revealed that less or more depending on the situation can be formed.

The position line 800 and the bonding line 900 printed perpendicular to the protruding piece 300 are used as a means for easily determining the bonding position when the plurality of films 200 are stacked on each other. The film 200 is bonded to the correct position by the 800 and the bonding line 900 is used to form a cylindrical in use.

On the other hand, since the copper wire 600, the hall sensor 700, the connection hole 400, etc. are formed on the flexible film 200 through a manufacturing process, such as a conventional flexible circuit board, and the like, The description will be omitted.

In order to use the present invention configured as described above, the flexible film 200 of a thin plate is first prepared, and then the four connection holes 400 are formed in one set at the upper and lower ends of the film 200 at regular intervals. Form a large number.

In the above state, the copper wire 600 pattern is continuously connected to the end point 510 without starting from the starting point 500, and is connected to both sides of the film 200 (surface and back surface) through the connection hole 400 in the process of being connected. Painted on to form an image Thereafter, the position line 500 and the coupling line 900 are vertically printed on the protruding piece 300, and a hall sensor 700 for detecting a magnet pole is formed at one end of the protrusion line 300.

As described above, when each part is formed on the film 200, one completed cylindrical stator 100 should be formed using the same. This will be described with reference to FIG. 2 as follows.

(Example)

First, the first film 210, the second film 220, and the third film 230 having the same shape and structure as the film 200 (the first, second, and third film described above are subjected to the lamination bonding process of the stator. For the purpose of explanation, the film 200 will be described with different reference numerals). Then, the first film 210 of the prepared film is placed on the work table. Thereafter, the position line 210a formed on the second film 220 is exactly matched to the bonding line 210a of the first film 210 to laminate-bond the first film 210 and the second film 220. When the first film 210 and the second film 220 are laminated and bonded as described above, the position line 230a formed on the third film 230 coincides with the coupling line 220b formed on the second film 220. As shown in FIG. 3, the copper wires (coils) 600 are arranged in an array at regular intervals.

When the first, second and third films 210, 220 and 230 are laminated and bonded through the above method, the first, second and third films are rolled into a cylindrical shape and then using an adhesive member such as a double-sided tape. Fixing both ends to maintain the cylindrical shape as shown in Figure 4 to complete the stator 100.

The completed stator 100 may be coupled to the motor side as in the conventional stator, and when implementing a two-phase BLDC motor or a four-phase BLDC motor, the first and second films or the first, second, third and fourth methods may be used as described above. It is possible to achieve a desired purpose by using a film and laminated bonding it.

As described above, according to the present invention, the basic skeleton of the stator is made of a thin flexible film, and since the copper wire patterns are arranged at regular intervals to form an image, the stator made of a conventional metal There is no need for a separate winding machine to wind the coil. Therefore, a separate winding machine and a lot of high manpower for winding the coil are not necessary, and the manufacturing process is shortened, thereby reducing the production cost.

In addition, since the copper wire patterns are arranged at regular intervals on the film during film production, conventional slots are not required. Therefore, when the motor is driven, a non-uniform and discontinuous magnetic field is formed by the conventional slot, thereby preventing the cogging phenomenon indicating the imbalance of the electromagnetic force, thereby driving the motor with high efficiency.

In addition, since the copper wire (coil) pattern is formed at regular intervals on the flexible film and rolled into a cylindrical shape and applied to the BLDC motor, the overall BLDC motor can be reduced in size and weight.

The present invention has been described above with reference to specific preferred embodiments, but the present invention is not limited to the above embodiments and various changes and modifications may be made by those skilled in the art without departing from the gist of the present invention. Make sure you can.

Claims (1)

In the BLDC motor which drives the motor by sensing the N pole or S pole of the rotor magnet located inside the stator by using a magnetic pole detection element such as a hall sensor, The stator 100 has a suitable length and a flexible film 200 is formed of a thin plate and the connection holes 400 are arranged in the upper and lower ends of the film 200 are arranged in a plurality at a predetermined interval with a plurality of pairs And, between the start point 500 and the end point 510 is connected to both sides of the film 200 through the connection holes 400 so that the middle can be connected continuously without interruption, the copper wire 600 to form an image, and the film 200 It is formed of a position sensor 800 and the coupling line 900 is formed on the lower side of the hall sensor 700 for sensing the magnetic pole and printed vertically on the protruding piece 300 formed on the upper side of the film 200, such a BLC motor having a flexible stator, characterized in that the film is rolled into a cylindrical shape in a plurality of laminated state to have the shape of the stator.