JPH11215787A - Electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric motor wherein structure is compact and manufacturing process is simplified. SOLUTION: This electric motor is equipped with a magnetic material shaft core 4 around which independent coils are wound, a stator 8 for generating magnetic field, and a rotor provided with at least two materials capable of being magnetized. When a current is made to flow in the coils, the materials SL1, SL2, SL3 which are capable of being magnetized reacts with magnetic field, and the rotor receives torque and rotates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the structure of an electric motor.

[0002]

2. Description of the Related Art In a conventional AC electric motor, a rotor is rotated by generating a rotating magnetic field by AC electricity. On the other hand, in a conventional DC motor, DC power is passed through a rotor provided in a magnetic field to rotate the rotor.

[0003]

According to the above-mentioned prior art, in the case of an AC motor, it is necessary to generate a rotating magnetic field by AC electricity, so that an AC power supply and related devices are required. On the other hand, in the case of a DC motor, it is necessary to supply a current to the moving rotor, so that it is necessary to provide brushes and commutator pieces at both the positive and negative terminals. Therefore, the structure was large. In addition, since a brush was also provided on the positive terminal side of the motor, flash was likely to occur due to anions present in the atmosphere, and abrasion was likely to occur. In order to solve these problems, development of an electric motor that can remove the brush on the positive terminal side is expected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric motor having a compact structure and a simplified manufacturing process.

[0005] By achieving this object, there is no need to generate a rotating magnetic field, which is necessary in a conventional AC motor, and there is no need to pass a three-phase AC power supply through a stator, or a single-phase starting device is attached. Eliminates the need. On the other hand, according to the present invention, it is not necessary to supply DC electricity to the moving rotor, so that it is not necessary to provide brushes on both the positive and negative terminals at the same time.

Another object of the present invention is to provide an electric motor having a relatively long life. Achieving this object eliminates the need for an AC power supply and eliminates the need to provide a brush on the positive terminal side of the power supply for the DC power supply, thereby reducing wear and extending the life. .

Another object of the present invention is to provide a hermetically sealed electric motor in which a commutator piece is brought into contact with a casing of a motor to introduce a drive current.

[0008]

According to the present invention, there is provided an electric motor having a compact structure and a simplified manufacturing process, comprising a magnetic shaft having at least two independent coils wound thereon. A heart, a stator for generating a magnetic field,
A rotor comprising at least two magnetizable materials, wherein when current is passed through the coil, the magnetizable materials and the magnetic field act to cause the rotor to generate torque. An electric motor that receives and rotates.

The magnetizable material is a silicon steel sheet formed parallel to each other and perpendicular to the axis.

In addition, the rotors are each rotated about an axis by 12 times.
Comprising three silicon steels mounted at 0 ° intervals, wherein when an electric current is passed through the independent coil and an N pole is generated in one of the plurality of silicon steel sheets, S on other steel sheets
It is configured to generate poles.

The stator has an N pole and an S pole for generating a magnetic field. When an N pole is generated in one of the plurality of silicon steel sheets, the N pole is generated.
The steel sheet that created the pole is rejected by the north pole of the stator and is attracted to the south pole of the stator, and the other steel sheet of the plurality of silicon steel sheets that created the south pole is By being attracted to the N pole of the stator and being rejected by the S pole of the stator,
The silicon steel sheet and the magnetic field act to cause the rotor to rotate by receiving torque.

In addition, when an electric current is passed through the independent coil at different time intervals and an N pole is generated in one of the plurality of silicon steel sheets, an S pole is generated in another steel sheet. Or the independent coil is such that the switching of the commutator strip only at the negative power supply terminal allows current to flow at different time intervals and avoids the use of a commutator strip on the positive terminal side that causes flash wear. It is configured.

[0013] Further, the coil is configured so that an electric current is passed by contacting the casing of the motor through a commutator piece.

This eliminates the need for a power supply line inside the motor, thereby making assembly relatively easy, and eliminating the need for a power supply line enables a sealed structure, thereby reducing oxygen inside after use. In addition, the flash is less likely to occur on the commutator pieces, and the life of the motor can be extended.

Thus, the advantages of the electric motor provided by the present invention include the elimination of the need for a three-phase AC power supply and its associated equipment, the elimination of a single-phase AC electric starting device, and the need for DC electricity. At the same time, there is no need to provide switching brushes for both the positive and negative terminals, and only one brush on the negative power supply side is sufficient, so that the structure can be made compact and the manufacturing process can be simplified.

Another advantage of the electric motor provided by the present invention is that flash wear is reduced and service life is prolonged because there is no need to use a switching brush on the positive terminal side.

Another advantage of the electric motor provided by the present invention is that a power supply line is not required by bringing a commutator piece into contact with a motor casing, thereby eliminating the need for a power supply line. After operation, the internal oxygen can be reduced to prevent flash wear on the switching brush.

The above and other objects of the present invention, as well as the advantages of the provided electric motor, will become more apparent when describing a preferred embodiment of the present invention with reference to the accompanying drawings.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a silicon steel sheet SL1,
It is a figure which shows the winding position of the 1st independent coil C1 with respect to SL2, SL3, and the magnetic body axis 4.

A first independent coil C1, a second independent coil C2, and a third independent coil C3 are wound around the cylindrical magnetic core 4 (see FIGS. 1, 3, and 5). A current is introduced from the terminal 11 to the first independent coil C1 in FIG.
It flows from the terminal 12 to the outside.

FIG. 2 is a plan view of FIG. 1 as viewed from above.
When a current is passed through the first independent coil C1, an N pole is generated in the silicon steel sheet SL1. As a result, the silicon steel sheet SL1 is rejected by the N pole of the stator 8 and is attracted to the S pole of the stator 8 at the same time. On the other hand, another two silicon steel sheets SL2 and SL3 have S
Poles occur. Therefore, the silicon steel sheet SL
2. SL3 is attracted to the N pole of the stator 8 and
It is rejected by the S pole of the stator 8. That is, a torque is generated by repulsion and suction between the N pole and the S pole generated in the silicon steel sheets SL1, SL2, and SL3 and the N pole and the S pole of the stator 8, and the torque is received. The rotor rotates.

FIG. 3 shows a silicon steel sheet SL1,
It is a figure which shows the winding position of 2nd independent coil C2 with respect to SL2, SL3, and the magnetic body axis 4. Second independent coil C2
, A current is introduced from the terminal 13 and flows from the terminal 14 to the outside.

FIG. 4 is a plan view of FIG. 3 as viewed from above.
When a current is passed through the second independent coil C2, an N pole is generated in the silicon steel sheet SL2. As a result, the silicon steel sheet SL2 is rejected by the N pole of the stator 8 and at the same time is attracted by the S pole of the stator 8. On the other hand, the other two silicon steel sheets SL1 and SL3 have S
Poles occur. Therefore, the silicon steel sheet SL
1. At the same time as SL3 is attracted to the N pole of the stator 8,
It is rejected by the S pole of the stator 8. That is, a torque is generated by repulsion and suction between the N pole and the S pole generated in the silicon steel sheets SL1, SL2, and SL3 and the N pole and the S pole of the stator 8, and the torque is received. The rotor rotates.

FIG. 5 shows silicon steel sheets SL1 and S
It is a figure which shows the winding position of the 3rd independent coil C3 with respect to L2, SL3, and the magnetic body axis 4. A current is introduced into the third independent coil C3 from the terminal 15 and flows from the terminal 16 to the outside.

FIG. 6 is a plan view of FIG. 5 as viewed from above.
When a current is passed through the third independent coil C3, an N pole is generated in the silicon steel sheet SL3. As a result, the silicon steel sheet SL3 is rejected by the N pole of the stator 8 and at the same time is attracted by the S pole of the stator 8. On the other hand, another two silicon steel sheets SL1, SL2
, An S pole is generated. As a result, the silicon steel sheets SL1 and SL2 are attracted to the N pole of the stator 8 and are rejected to the S pole of the stator 8 at the same time. That is, a torque is generated by the repulsion and suction between the N and S poles generated on these silicon steel sheets and the N and S poles of the stator, and the rotor is rotated by receiving the torque.

FIG. 7 is a sectional view showing a main structure of an electric motor according to the present invention, which has a compact structure and a simplified manufacturing process.

First, second, and third independent coils C1, C
2. The positive terminals 11, 13, 15 of C3 are connected to each other via a copper ring sheet 5. Copper ring sheet 5
Are in contact with the positive electrode casing 6 for guide. The guide positive casing 6 is connected to a positive terminal of an external power supply. On the other hand, the first, second, and third independent coils C1, C
2. The negative terminals 12, 14, 16 of C3 contact the guide negative casing 10 at different time intervals by switching the commutator pieces 7. The negative terminals 12, 14, 16 are
They are insulated from each other at a predetermined interval. The silicon steel sheets SL1, SL2, and SL3 are respectively attached to different portions of the magnetic material axis 4, and are surrounded by a stator 8 for generating a magnetic field. The guide negative casing 10 and the guide positive casing 6 are insulated by a plastic fixing base 9.

The negative electrode casing 10 for guide and the positive electrode casing 6 for guide are connected to the negative terminal and the positive terminal of an external power source, respectively, and the first, second and third independent coils C1, C2, C3 are connected by the commutator piece 7. When the negative terminals 12, 14 and 16 are switched, the negative terminals 12 and 1 are changed at different time intervals.
Since the fourth and fourth members 16 and 16 are connected to the guide negative electrode casing 10, currents flow through the first, second and third independent coils C1, C2 and C3 at different time intervals. First, second,
According to the energized state of the third independent coils C1, C2, C3,
Silicon steel sheets SL1, SL2 and SL3 are S
It is magnetized to a pole or a north pole. As a result of the interaction between the magnetic poles generated in the rotor and the S and N poles of the stator 8, the rotor provided with the silicon steel sheets SL1, SL2, and SL3 receives torque and rotates. When the rotor rotates, the commutator piece 7 switches the connection between the negative terminals 12, 14, 16 of the first, second, and third independent coils C1, C2, C3 and the negative terminal of the external power supply. As a result, the first, second and third independent coils C1, C2, C3 enter the next energized state, and the rotor further rotates.

Therefore, the first, second and third independent coils C
The negative terminals 12, 14, 16 of C1, C2 and C3 are sequentially connected at different time intervals to the negative electrode casing 10 for guiding.
, Current flows through the first, second and third independent coils C1, C2, C3 at different time intervals, respectively, and the silicon steel sheets SL1, SL2, SL
The rotor provided with 3 continues to rotate under the torque.

[0031]

As described above, according to the present invention, there is no need to generate a rotating magnetic field required for a conventional AC motor, so that it is not necessary to pass three-phase AC electricity through the stator. There is no need to attach an activation device. on the other hand,
Since there is no need to pass DC electricity through the moving rotor,
It is not necessary to provide brushes for both the positive and negative terminals for energizing the rotor at the same time.

Accordingly, it has become possible to provide an electric motor having a relatively long life and a compact structure and a simplified manufacturing process.

[Brief description of the drawings]

FIG. 1 is a view showing a rotor of an electric motor according to the present invention, wherein silicon steel sheets SL1, SL2 and SL3 are shown.
FIG. 4 is a diagram illustrating a winding position of a first independent coil C1 with respect to a magnetic material axis 4;

FIG. 2 is a plan view of a stator and a rotor of the electric motor according to the present invention as viewed from above.

FIG. 3 is a view showing a rotor of the electric motor according to the present invention, wherein silicon steel sheets SL1, SL2 and SL3 are provided.
FIG. 4 is a diagram illustrating a winding position of a second independent coil C2 with respect to a magnetic material axis 4;

FIG. 4 is a plan view of a stator and a rotor of the electric motor according to the present invention as viewed from above.

FIG. 5 is a view showing a rotor of the electric motor according to the present invention, wherein silicon steel sheets SL1, SL2 and SL3 are provided.
FIG. 7 is a diagram illustrating a winding position of a third independent coil C3 with respect to a magnetic material axis 4;

FIG. 6 is a plan view of the stator and the rotor of the electric motor according to the present invention as viewed from above.

FIG. 7 is a sectional view showing a main structure of an electric motor according to the present invention.

[Explanation of symbols]

 4 axis center SL1, SL2, SL3 Silicon steel sheet 8 Stator

Claims (7)

[Claims] 1. A magnetic field generating stator comprising at least two independent coils, a magnetic field generating stator, and a rotor comprising at least two magnetizable materials. An electric motor, wherein when passed through, the magnetizable material and the magnetic field act to cause the rotor to rotate under torque. 2. The electric motor according to claim 1, wherein said magnetizable material is a silicon steel sheet, formed parallel to each other and perpendicular to said axis. 3. The rotor comprises three pieces of silicon steel mounted at 120 ° intervals about an axis, and current is passed through the independent coil to set one of the silicon steel sheets. N on steel sheets
The electric motor according to claim 2, wherein when the pole is generated, an S pole is generated in another steel sheet. 4. The stator has an N pole and an S pole for generating a magnetic field, and the N pole is generated when one of the plurality of silicon steel sheets has an N pole. The steel sheet is repelled to the N pole of the stator and is attracted to the S pole of the stator, and the other steel sheet of the plurality of silicon steels that has produced the S pole is the N sheet of the stator. While being sucked by the pole,
2. The electric motor according to claim 1, wherein the silicon steel and the magnetic field act by being rejected by the S pole of the stator, and the rotor is rotated by receiving torque. 3. 5. The independent coil according to claim 1, wherein when an electric current is passed at different time intervals, an N pole is generated in one of the plurality of silicone steel sheets, and an S pole is generated in the other steel sheet. Or the independent coil is configured such that the switching of the commutator strip only at the negative power supply terminal allows current to flow at different time intervals, thereby avoiding the use of a commutator strip that causes flash wear. An electric motor according to claim 1. 6. The electric motor according to claim 1, wherein the independent coil is contacted with a casing of the motor through the commutator piece to pass an electric current. 7. The electric motor according to claim 1, wherein said shaft center is made of a magnetic material.