KR100311899B1 - Induction Motor Using Film Coil - Google Patents

Abstract

The present invention relates to an induction motor using a thin film coil, unlike a conventional electric motor winding a coil to an iron core.

That is, the induction motor according to the present invention is simple in structure and easy to manufacture by attaching a thin film coil to the inner wall of the stator, unlike winding a coil on the iron core of the stator like a conventional electric motor. Since the magnetic flux density does not saturate at the iron core, the volume of the iron core is reduced, making the motor lighter and smaller.

In addition, since the magnetic flux density is not saturated in the iron core of the stator or the rotor, the induction motor according to the present invention enables the practical use of the disc-shaped induction motor by using a thin disc-shaped iron core, and because the energy loss by the iron core is small. Compared with the conventional induction motor in which a coil is wound around an iron core, the efficiency of a large-capacity large output induction motor can be greatly increased.

In particular, the thin film coil of the induction motor according to the present invention is easy to connect the coils facing each other with an insulating film therebetween to form a thin film coil of a motor having a high coil occupancy by forming a thin film coil without wasting space in one coil layer. can do.

Description

Induction Motor Using Film Coil

The present invention relates to an induction motor using a thin film coil, unlike a conventional electric motor winding a coil to an iron core.

Conventional induction motors are difficult to manufacture coils on the core of stator, and the production cost is high, and miniaturization is difficult, so it is difficult to manufacture small precision induction motors that are used in audio equipment, video equipment, computer peripherals and office automation equipment. It was hard.

Conventionally, there have been examples in which thin film coils have been applied to various motors except induction motors, but induction motors using thin film coils have low efficiency compared to motors using winding coils.

Therefore, an object of the present invention is to provide a structure of cylindrical and disk induction motor using a thin film coil.

In addition, the present invention provides a cylindrical and disk-shaped induction motor structure using a thin film coil, by forming a thin film coil without wasting space in one coil layer to provide a thin film coil of an induction motor having a high coil occupancy. do.

In addition, an object of the present invention is to provide an improved configuration of the thin film coil of the single-phase induction motor or three-phase induction motor.

The present invention, unlike the conventional method of winding the coil on the iron core of the stator like the electric motor, by attaching a thin film coil on the inner wall of the stator, the structure of the motor is simple, easy to manufacture, light weight and miniaturization is possible.

In addition, although the practical use of the disk-shaped induction motor was difficult as a method of winding a coil on the existing stator, the disk-shaped induction motor was made practical by using the thin film coil according to the present invention.

When the thin film coil according to the present invention is used, the induction motor has a large space spacing so that the magnetic flux density does not saturate in the iron core of the stator or the rotor.

On the other hand, thin film coils used in existing motors and generators have been formed by plating coils on insulating films or by forming copper foils bonded to insulating films, which makes it difficult to stack many coil layers. Low generalization failed.

Therefore, in the present invention, the copper foil bonded to the cross-section on the insulating film is etched to form a lower layer coil, and the insulating film is applied thereon except for the connection point, and the copper foil formed by electroless plating or electrolytic plating is etched to form an upper coil and the insulating film The connection between them is made automatically through the connection point.

In addition, in the present invention, a thin film coil is formed by etching copper foil bonded to both surfaces with an insulating film interposed therebetween, and the coil connection between the insulating films is formed by punching and plating the opposite terminals with the insulating film interposed therebetween. Was facilitated.

As described above, the thin film coil according to the present invention can easily connect coils facing each other with an insulating layer therebetween, thereby forming a thin film coil without wasting space in one coil layer, thereby forming a thin coil having a high coil occupancy rate.

1 is a side view showing a cylindrical thin film coil induction motor of the present invention

2 is a side view showing a disk-shaped thin film coil induction motor of the present invention

3 is a conceptual diagram of a thin film coil of a cylindrical induction motor of the present invention

4 is a conceptual diagram of a thin film coil of the disk-shaped induction motor of the present invention

5 is a configuration diagram of a thin film coil of a cylindrical induction motor of the present invention

6 is a configuration diagram of a thin film coil of the disc-shaped induction motor of the present invention

7 is a configuration diagram of a thin film coil of a three-phase cylindrical induction motor of the present invention

8 is a configuration diagram of a thin film coil of a three-phase disk-shaped induction motor of the present invention

The basic induction motor of the present invention is composed of a rotor and a stator made of iron cores, and a rotor made of copper or aluminum, like a conventional induction motor, is embedded in an iron core, and a thin film coil is attached to an inner wall of the stator. It is.

The cylindrical induction motor of the present invention is a squirrel-shaped conductor made of copper or aluminum in a stator in which a circular annular iron core is laminated, and a thin film coil attached to the inner wall of the stator, and a rotor in which a circular iron core is laminated. Is a structure embedded in the iron core of the rotor.

The disk-shaped induction motor of the present invention has a disk-shaped rotor made by rolling a thin iron plate in the center as shown in FIG. 2, two disk-shaped stators made by rolling a thin iron plate are around the rotor, and two thin film coils on the inner wall of the stator. Is attached, and a wheel-shaped conductor made of copper or aluminum is embedded in the iron core of the rotor.

The induction motor using the thin film coil of the present invention does not saturate the magnetic flux density in the iron core since the thin film coil is located at the space spacing of the stator and the rotor, so the space spacing is large and the magnetic flux density is small.

Therefore, in the case of the cylindrical induction motor, the iron core thickness of the stator can be reduced, and in the case of the disc type induction motor, the iron core thickness of the stator and the rotor can be reduced, thereby enabling practical application of a thin plate-shaped induction motor.

Therefore, the thin film coil induction motor does not saturate the magnetic flux density in the iron core of the stator or rotor, so there is little energy loss due to the iron core. It can increase.

On the other hand, in the thin film coil induction motor, most of the energy loss is generated by the resistance of the conductor of the rotor and the thin film coil attached to the stator. When the cross sectional area of the conductor of the rotor is increased, a large amount of current flows in the thin film coil, Since the loss caused by resistance is large and the cross-sectional area of the conductor of the rotor is small, the loss due to the resistance of the conductor of the rotor increases. Therefore, the cross-sectional area of the rotor conductor and the size of the thin film coil are mutually related. Should be determined to give the best efficiency.

The thin film coil shape of the basic cylindrical induction motor of the present invention has a structure in which the unfolded hexagon is repeated as shown in FIG. 3 and the interval in which the unfolded hexagon is repeated coincides with the spacing of the magnetic poles. However, if a repeating hexagonal coil is formed in one coil layer, the overlapping portions overlap each other. Therefore, the solid line portion of FIG. 3 is formed by etching copper foil bonded in cross section to the insulating film, and the insulating film is formed thereon except for the connection point. After coating, the copper foil formed by electroless plating or electrolytic plating is etched to form a dotted line in FIG. 3, or the copper foil bonded to both sides is formed by etching the solid line and dotted line in FIG. In addition, a thin film coil of the basic cylindrical induction motor of the present invention is formed by drilling and plating a connection portion of the coils on both sides so that the coils on both sides are connected in series.

The thin film coil shape of the basic disk-shaped induction motor of the present invention has a shape in which a circuit portion perpendicular to the direction of movement is radially changed from an unfolded hexagon that is a cylindrical thin film coil shape as shown in FIG. 4 and a fan-shaped unfolded shape such as the number of magnetic poles. Hexagons are formed on the disk, and the interval of the circuit perpendicular to the direction of movement of the unfolded hexagon is equal to the spacing of the magnetic poles.

That is, the solid line portion of FIG. 4 is formed by etching copper foil bonded in cross section to the insulating film, and the insulating film is applied thereon except for the connection point, and the copper foil formed by electroless plating or electrolytic plating is etched to etch the dotted line in FIG. Or by etching the copper foil bonded to both sides with the solid line and the dotted line portion of FIG. 4 interposed between the insulating films, and punching and plating the connection portions of the coils on both sides so that the coils on both sides are connected in series. To form a coil layer. Then, a disk-shaped thin film coil is formed by stacking the start terminals and the end terminals of the hexagonal circuits connected to each coil layer by connecting the coil layers in series with a conductive adhesive.

Thin-film coils having a plurality of circuits are formed in succession by repeatedly forming half portions of a plurality of unfolded hexagons in the upper and lower coil surfaces at intervals of magnetic poles, and corresponding hexagons through holes formed at the vertices of the half portions of the unfolded hexagons, respectively. If the half of is connected in series to form a continuous circuit, and connected in series at the start terminal and end terminal of the continuous circuit at both ends of the thin film coil, it is possible to form a thin film coil having a plurality of unfolded hexagonal circuit.

That is, the thin film coil using the unfolded hexagon forms a continuous circuit that is repeated at intervals of magnetic poles when the unfolded hexagonal circuits of the half portions formed on the upper and lower surfaces with the insulating film interposed therebetween are connected in series through the holes in the vertices of the hexagon. A plurality of continuous circuits of the continuous circuits are connected in series with each other at the start terminal and the end terminal of each continuous circuit at both ends of the thin film coil.

Cylindrical thin-film coils having a plurality of circuits are formed by repeating a plurality of unfolded hexagonal halves at the intervals of magnetic poles on two upper and lower coil surfaces having a long insulating film therebetween as shown in FIG. A plurality of continuous circuits are connected in series and repeated at intervals of magnetic poles.

A cylindrical thin film coil is formed by connecting the start terminal and the end terminal of the continuous circuit at both ends of the plurality of continuous circuits in series.

As described above, the cylindrical thin film coil is formed by repeatedly forming an unfolded hexagon having a plurality of circuits on copper foils on the upper and lower surfaces with a long insulating film therebetween at intervals of magnetic poles, connecting the thin film coils formed on the upper and lower surfaces in series, and then winding them in a cylinder.

In addition, the thin film coil is constructed so that the circuit space perpendicular to the movement direction of the unfolded hexagonal coil is equal to the spacing of the magnetic poles so that the force in the same direction acts on the circuit in the movement direction and the vertical direction at the magnetic poles having different magnetic pole directions. .

When the long thin film coil is wound on the cylinder, the circuit position perpendicular to the direction of movement of each coil layer is overlapped at all times, so that the force in the same direction is generated in all coil layers every time the magnetic pole is changed. The spacing of the circuit perpendicular to the direction of motion in which it is located is adjusted in accordance with the diameter of the coil layer.

In the thin film coil of the disk-shaped induction motor having a plurality of circuits, as shown in FIG. 6, two half-heights of unfolded hexagons are formed on the power plate at intervals of magnetic poles on two upper and lower coil surfaces with the disk insulating film interposed therebetween. It consists of a plurality of continuous circuits which are connected at the vertices of the hexagon through serial holes and are repeated at intervals of magnetic poles. The plural continuous circuits are connected by serially connecting the start terminal and the end terminal of the continuous circuit to each other to form a coil layer, and are laminated while the start and end terminals of the serially connected continuous circuits in each coil layer are connected in series with each other. To make a disk-shaped thin film coil.

As described above, the disk-shaped thin film coil forms an unfolded hexagon having a plurality of circuits on the copper foils above and below with the disk-shaped insulating film interposed therebetween by the number of magnetic poles, and connects the coils formed above and below in series to stack the coil layers. While adjacent coil layers are formed in series.

The thin film coil is constructed so that the distance between the circuits perpendicular to the movement direction of the hexagonal coil unfolded is equal to the spacing of the magnetic poles so that the force in the same direction acts on the circuits in the movement direction and the vertical direction at different magnetic poles. .

Further, the positions of the radial circuits of the respective coil layers are overlapped so that they always match, so that whenever the magnetic poles are changed, the force or electromotive force in the same direction is generated in all the coil layers.

Thin-film coils of three-phase cylindrical induction motors form hexagonal half-sections on the upper and lower two coil surfaces with a long insulating film therebetween as a multiple of 3 times the number of magnetic poles on all coil surfaces. It is a series of multiple circuits of multiples of 3, connected in series through holes in the vertices of. By dividing the continuous circuits of the product multiplied by three into three phases, three-phase cylindrical thin-film coils are made by connecting the start terminals and the end terminals at both ends of the continuous circuits in series with each other.

Thin-film coils of three-phase disk-shaped induction motors form hexagonal half-sections on the two upper and lower coil surfaces with a disk-shaped insulating film interposed therebetween as multiples of 3 times the number of magnetic poles on all disks. It is a series of multiple circuits multiplied by 3 by connecting in series through holes in hexagonal vertices. The continuous circuits of multiples of 3 are divided into three phases, and the continuous terminals of each phase are connected in series to each other to form a single coil layer consisting of three phases. The start terminal and the end terminal are laminated while connecting the coil layers in series to make a three-phase disk-shaped thin film coil.

On the other hand, the thin-film coil configuration of single-phase cylindrical and disc-shaped induction motors is similar to the three-phase thin-film coil, and the unfolded hexagonal circuits of the upper and lower halves formed through the insulating film are connected in series through holes in the vertices of the hexagon. One continuous circuit is repeated at intervals, and a plurality of continuous circuits of the continuous circuits are connected in series with each other at the start terminal and the end terminal of each continuous circuit at both ends of the thin film coil.

However, the three-phase thin film coil is composed of three independent coils, whereas the single phase thin film coil is composed of two coils, a main coil and an auxiliary coil.

In the present invention, unlike winding a coil on the iron core of the stator like a conventional electric motor, the structure is simple and easy to manufacture by attaching a thin film coil to the inner wall of the stator. It is not saturated, and the volume of iron core is reduced, making it possible to reduce the weight and size of the motor.

In addition, since the magnetic flux density does not saturate in the iron core of the stator or the rotor, the present invention enables the practical use of a disc-shaped induction motor using a thin disc-shaped iron core, and since the energy loss by the iron core is small, a coil is placed on the iron core. Compared to the wound induction motor, the efficiency of a large-capacity large output induction motor can be greatly increased.

In the present invention, by forming a lower layer coil by etching the copper foil bonded to the cross-section to the insulating film, the insulating film is applied on the insulating film except the connection point, and then the copper foil formed by electroless plating or electrolytic plating is etched to form the upper coil. The connection was made automatically through the connection point, and the copper foil bonded to both sides was etched with the insulating film interposed therebetween to form a coil, and the coil connection between the insulating films was formed by drilling a hole in the opposite terminal with the insulating film interposed therebetween. This facilitates the connection between each coil layer.

In particular, the present invention can facilitate the plating process by etching the thin film coil shape after drilling and plating the holes at the opposite terminals before etching the connection of the coils facing each other with the insulating film interposed therebetween.

In addition, the present invention can easily connect the coils facing each other with the insulating film therebetween to form a thin film coil without wasting space in one coil layer can form a thin film coil of the motor having a high coil occupancy.

In order to manufacture the thin film coil of the present invention, if it is manufactured by etching method, printing method, or thin film coating method, it can be easily automated and made thin, precision small electric motor can be easily manufactured, and several coil layers can be formed on one disc at the same time. When produced and cut, mass production takes place and production cost is low. Since the thin film coil of the present invention has a negligible inductance and a high coil occupancy, it is possible to manufacture a highly efficient electric motor.

Claims (4)

A cylindrical thin-film coil induction motor comprising: a stator formed by stacking circular annular iron cores, a rotor formed by stacking disc-shaped iron cores inside the stator, and a space between the stator and the rotor on the inner wall of the stator. The thin film coil is formed with a plurality of hexagonal half portions each of which is formed on two upper and lower coil layers having a long insulating film interposed therebetween, and through the holes formed at the vertices of the half portions of the hexagonal shape. Corresponding portions of the half of the unfolded hexagon are connected in series so that a plurality of unwrapped hexagonal closed circuits are formed at intervals of magnetic poles, and the unwrapped hexagonal closed circuit is serially connected through openings in the start and end terminals of the unfolded hexagonal closed circuit. Thin film coil is configured, the thin film coil In the cylindrical winding, the circuit spacing in the cylindrical length direction coincides with the magnetic pole spacing of the stator, and in each thin film coil layer, the circuit is formed such that the length of the cylindrical length direction overlaps the same position. Electric motor. 8. The cylindrical thin-film coil induction motor according to claim 7, wherein the half-sections of the unfolded hexagons of the thin-film coil can be used for three-phase use, respectively, by forming a multiple of 3 times the number of magnetic poles in all the coil layers. A disk-shaped thin film coil induction motor, comprising: a disk-shaped rotor made of a rolled up thin plate, two disk-shaped stators made from a rolled up thin plate around the rotor, and a space between the rotor and the stator in the inner wall of the stator. It consists of a thin film coil attached, wherein the thin film coil is formed with a plurality of hexagonal half portions each formed in two upper and lower coil layers having a disc insulating film interposed therebetween, and a hole formed at a vertex of the half portion of the unfolded hexagon. Half of the corresponding hexagons are connected to each other in series to connect the upper and lower coil layers, which form hexagonal closed circuits as many as the number of magnetic poles, to insulate the coil layers, and to start the terminal of the closed circuits in the adjacent coil layers. It consists of an insulating layer for connecting the terminal and the terminal repeatedly in series. A plurality of coil layers and an insulation layer are stacked, and independent unfolded hexagonal closed circuits are connected in series through holes of a start terminal and an end terminal of a closed circuit of a bottom coil layer and a top coil layer. A disk-shaped thin film coil induction motor, wherein the radial circuits of the respective coil layers are stacked so as to overlap at the same position when the layers are stacked, and the intervals of the respective radial circuits are formed to coincide with the intervals of the magnetic poles of the stator. 12. The disk-shaped thin film coil induction motor of claim 11, wherein the half-sections of the unfolded hexagons of the thin film coil can be used for three-phase use, respectively, by forming a multiple of 3 times the magnetic pole number in all the coil layers.