KR20090035776A - Rotational driving device using magnetic force - Google Patents

Abstract

A magnetic force rotating device can rotate the driving shaft at high speed with a low power by rotating rotor by taking advantage of the attraction force of the permanent magnet and electromagnet and repulsive force. A plurality of permanent magnet holders(12) is installed around the cylindrical rotor(1). The permanent magnet(122) is inserted in the permanent magnetic insertion hole(121) of the permanent magnet holder. The ungula electromagnet(2) is arranged on the outer circumference of rotor. The ungula electromagnet is installed so that both ends are located in the upper of the permanent magnet holder of the respective pair. The permanent magnet crosses the electromagnet to form an angle of inclination.

Description

Rotational driving device using magnetic force

The present invention relates to a magnetic rotating device that rotates by magnetic force, and more particularly, to a magnetic rotating device that is capable of obtaining high rotational torque with low power consumption and low power.

Currently, various kinds of magnetic rotating devices are used. Representative of these magnetic rotating devices are electric motors or motors. These electric motors include a stator and a rotor, and are configured to rotate the rotor by the attractive force and repulsive force between the stator and the rotor. At this time, the rotor is coupled to the drive shaft and the drive shaft is driven to rotate in accordance with the rotation of the rotor to provide a rotational force to the external device.

The attraction and repulsive forces between the stator and the rotor are generated using permanent magnets and electromagnets. Electricity is required for the operation of the electromagnet. As electricity, direct current or alternating current is used. Alternating current includes induction motors and synchronous motors, and direct current uses brushless motors and stepping motors. (stepping motor).

However, in the conventional motor, there is a problem that power efficiency and mechanical efficiency are not good and power consumption is unnecessarily high and heat, vibration and noise are generated.

For example, in the conventional motor, the rotation of the rotor is prevented by unnecessary induction current generated by the electric field and the magnetic field generated by the distorted wave or the neighboring coil. In addition, since only the repulsive force of the permanent magnet and the electromagnet is used, continuous power supply is required to drive the motor, and thus there is a problem in that power is not efficiently used as a whole.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a magnetic rotating device capable of obtaining high rotational torque with low power consumption and low power by promoting efficient use of electric power.

Magnetic rotating device according to the present invention for solving the above object is a housing, a drive shaft rotatably supported coupled to the housing, the rotor made of a cylindrical shape and fixedly coupled to the drive shaft, and the outer peripheral surface of the rotor and And a plurality of electromagnets disposed at regular intervals, and drive control means for controlling a current supply to the electromagnets, and a plurality of permanent magnet holders are installed on the inner circumferential surface of the rotor at regular intervals. Permanent magnet is coupled to the permanent magnet holder, the permanent magnet and the electromagnet is characterized in that arranged to form a constant inclination angle.

In addition, the permanent magnet holder is disposed in pairs, the permanent magnet coupled to the pair of permanent magnet holder is set so that the polarity is opposite to each other, the electromagnet is characterized in that the horseshoe type electromagnet.

In addition, one side of the rotor is further provided with a fixing plate provided with at least one Hall element on the front surface, one side of the fixing plate is installed at a predetermined distance from the fixed plate and fixedly coupled to the drive shaft, the Hall element At least one permanent magnet is installed at a position corresponding to the at least one rotating plate is characterized in that it is further provided.

In addition, the rotor is characterized in that a plurality provided in the longitudinal direction of the drive shaft.

In addition, the drive control means is characterized in that for supplying the current in the opposite direction to one electromagnet and the adjacent electromagnet.

According to the present invention having the above-described configuration, the rotor is rotated using the attractive force and repulsive force of the permanent magnet and the electromagnet. Therefore, the drive shaft can be rotated with high rotational power using very low power.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. The embodiments described below show one preferred embodiment of the present invention, and examples of such embodiments are not intended to limit the scope of the present invention. The present invention can be carried out in various ways without departing from the technical spirit, which can be easily understood by those skilled in the art.

1 is for explaining the basic concept of the present invention, which is a cross-sectional view of the main portion of the magnetic rotating device according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a rotor. The rotor 1 has a cylindrical body 11, and a predetermined number, in this example, four permanent magnet holders 12 are attached to the inner circumferential surface of the body 11 at predetermined intervals. In addition, a plurality of electromagnets 2 are arranged outside the rotor 1 at regular intervals from the rotor 1, and in this example, eight. The electromagnets 2 are also arranged at regular intervals from each other. The number of the permanent magnet holder 12 and the electromagnet 2 is not limited to a specific value.

2 is a perspective view illustrating the shape of the permanent magnet holder 12. The permanent magnet holder 12 is formed of an arc-shaped hexagonal body corresponding to the shape of the body 11 of the rotor 1. The permanent magnet holder 12 has a plurality, in this example three permanent magnet insertion holes 121, the permanent magnet 122 is inserted therein. The number of the permanent magnet insertion holes 121 is not limited to a specific number. In addition, as the permanent magnet 122, it is preferable to use a strong magnetic force of 5,000 Gauss or more, such as a histomeric permanent magnet such as neodymium. Of course, the material and the like of the permanent magnet 122 is not limited to any particular one.

In particular, the permanent magnet insertion hole 121 is formed to have a constant inclination angle rather than the vertical direction with respect to the circumferential surface. Accordingly, the permanent magnet 122 is also inclined with respect to the circumferential surface of the body (11).

3 is an explanatory diagram for explaining the reason why the permanent magnet 122 is inclined.

3A illustrates a case where two bar magnets are arranged in the vertical direction with the same pole, for example, the N pole, adjacent to each other. In the drawing, if the magnetic force generated at the N pole of the upper magnet is A and the magnetic force generated at the N pole of the lower magnet is A ', the upper and lower magnets have a difference of 180 degrees from each other. The force is applied in the B and B 'directions, respectively.

3B illustrates a case in which two bar magnets are disposed to be inclined at a predetermined angle to each other while the same poles, for example, N poles are adjacent to each other. In FIG. 3B, as in FIG. 3A, when the magnetic force generated at the N pole of the upper magnet is A and the magnetic force generated at the N pole of the lower magnet is A ′, the upper and lower magnets are repulsed in the C direction. That is, the repulsive force and attraction force between the magnets can be interpreted as the vector sum of the magnetic forces generated by each magnet.

In FIG. 1, the permanent magnet 122 provided on the inner circumferential surface of the rotor body 11 and the electromagnet 2 provided on the outer side of the rotor body 11 are disposed to be inclined to each other at a predetermined angle. Therefore, if the magnetic force of the electromagnet 2-1 is set to repulse with the permanent magnet 122 of the rotor 1, the electromagnet 2-1 is in a fixed state and the rotor 1 is rotatable, so that the rotor (1) rotates in a constant direction, that is, the vector sum of the vector force of the magnetic force emitted from the electromagnet 2 and the vector force of the magnetic force emitted from the permanent magnet 122. In particular, the next electromagnet 2-2 with the rotor 1 rotated at a certain angle, for example with the rotor 1 rotated to a point between one electromagnet 2-1 and the electromagnet 2-2. If the permanent magnet 122 is set to be mutually attracted, the rotational force, that is, the rotational speed and the torque of the rotor 1 becomes larger.

In addition, in the above structure, if the magnetic force of the permanent magnet 122 is large enough, the rotational force of the rotor 1 can be set very high even when a very low current is supplied to the electromagnet 2.

On the other hand, in FIG. 3, since only the magnetic force emitted from one of the upper and lower magnets is used, there is a disadvantage in using the magnetic force efficiently. In addition, unnecessary power consumption occurs when an electromagnet is used as an upper magnet.

4 is an explanatory diagram for illustrating a concept in the case where the problem is secured.

In Fig. 4, a horseshoe magnet is used as the upper magnet, and the lower magnet is inclined with respect to the upper magnet. Of course, the lower magnet may be disposed in the vertical direction, and the upper magnet may be disposed to be inclined with respect to the lower magnet. In addition, the lower magnet is arranged so that different poles are placed on the upper side so that the repulsive force or attraction force is applied to the upper horseshoe magnet in the same way.

5 is a structural diagram showing an example of a structure of the rotor 1 according to the present invention to which the above concept is applied and a shape in which the horseshoe-shaped electromagnet 2 is installed to correspond to the rotor 1.

In the figure, a plurality of permanent magnet holders 12 are installed on the inner circumferential surface of the cylindrical rotor 1 at regular intervals. At this time, the permanent magnet holder 12 is installed while forming a pair (12A, 12B), respectively. The permanent magnet 122 is inserted into the permanent magnet insertion hole 121 of the permanent magnet holder 12. At this time, the permanent magnet 122 is coupled to the holder 12 so that the magnet polarities of the paired holders 12A and 12B are opposite to each other. For example, when the upper side of the permanent magnet 122 inserted into the permanent magnet holder 12A is set to the N pole, the permanent magnet 122 inserted into the permanent magnet holder 12B is the S pole Is set to be.

On the outer circumferential surface of the rotor 1, a horseshoe type electromagnet 2 is disposed at a predetermined interval. At this time, the horseshoe type electromagnet 2 is installed so that both ends thereof are located above the pair of permanent magnet holders 12A and 12B, respectively.

Although not specifically shown in the drawings, the electromagnet 2 is controlled to be driven by a separate driving circuit and a microprocessor. The microprocessor supplies current to the electromagnet 2 via a drive circuit.

As can be seen in FIG. 5, when the number of permanent magnet holders 2 provided on the rotor 1 is four pairs and the number of electromagnets 2 is eight, four of the electromagnets 2 are used. Is located at a point corresponding to the permanent magnet holder (2), the remaining four are located in the interval between the permanent magnet holder (2). The microprocessor first supplies an electric current in one direction to the electromagnet 2-1 disposed at the position of the permanent magnet holder 2 to set the electromagnet 2 into a state in which the permanent magnet 122 and the repulsive force act. The electromagnet 2-1 and the neighboring electromagnet 2-2 are set to a state in which the permanent magnet 122 and the attraction force act by supplying a current in the opposite direction to the electromagnet 2-1.

Accordingly, the rotor 1 is rotated in one direction so that the permanent magnet holder 12 moves to the installation position of the neighboring electromagnets 2-2. In this state, the microprocessor reverses the direction of the current flowing through the electromagnets 2-1 and 2-2, thereby setting the electromagnet 2-2 to a state in which the permanent magnet 122 and the repulsive force act again. In addition, the electromagnet 2-1 is set to a state in which the permanent magnet 122 and the attraction force.

By repeating the above operation, the rotor 1 is continuously rotated in a predetermined direction. At this time, the rotational speed of the rotor can be gradually added or decreased in accordance with the speed of alternating the direction of the current supplied to the electromagnet (2).

When the microprocessor cuts off the current supplied to all the electromagnets 2, the attraction force acts between all the electromagnets 2 and all the permanent magnets 122, so that the rotor 1 quickly stops rotating.

6 is a perspective view showing a main portion of the magnetic rotating device according to the first embodiment of the present invention.

The rotor 1 in FIG. 6 is constructed substantially the same as the structure shown in FIG. 5. The cover 13 is fixedly coupled to both sides of the rotor 1. The through hole (not shown) for penetrating the drive shaft 3 is formed in the center part of this cover 13. The cover 13 and the drive shaft 3 is fixedly coupled by the fixing member 131. In addition, although not specifically shown in the drawings, the drive shaft 3 is rotatably supported and coupled to the housing through a bearing, and the electromagnet 2 is fixedly coupled to the inner wall surface of the housing through, for example, a bracket or a frame.

Fig. 7 is a perspective view showing the main part of the magnetic rotating device according to the second embodiment of the present invention, and Fig. 8 is a sectional view of the main part thereof. In addition, in FIG. 7 and FIG. 8, the same code | symbol is attached | subjected to the substantially same part as FIG. 6 mentioned above, and the detailed description is abbreviate | omitted.

In FIG. 7, the fixing plate 4 is installed on one side of the rotor 1. This fixing plate 4 is fixedly installed in the housing. The through hole 41 through which the drive shaft 3 penetrates is formed in the center part of this fixing plate 4. In this case, a bearing for rotatably supporting the drive shaft 3 may be provided in the through hole 41 as necessary. At least one hall element 42 is installed at a predetermined front surface of the fixing plate 4. This hall element 42 is coupled to a drive circuit or a microprocessor via a conductor not shown.

The rotating plate 5 is installed on the front of the fixed plate 4 at regular intervals from the fixed plate 4. The through hole 51 through which the drive shaft 3 penetrates is provided in the center part of this rotating plate 5. The rotating plate 5 is fixedly coupled to the drive shaft 3 through the fixing member 53 to rotate with the rotation of the drive shaft 3. In particular, at least one permanent magnet 52 is provided at one side of the rotating plate 5 at a position corresponding to the hall element 42.

In the above structure, when the drive shaft 3 rotates by the rotation of the rotor 1, the rotating plate 5 rotates at the same time. Then, the permanent magnet 52 installed on the rotating plate 5 is rotated. The rotation of the permanent magnet 52 is detected by the hall element 42 provided on the fixed plate 4, and the detection signal is provided to the microprocessor. The microprocessor can precisely control the rotational speed of the rotor 1 by appropriately adjusting the current supplied to the electromagnet 2 on the basis of the detection signal of the Hall element 42, as well as of the rotor 1. It is possible to maintain a stable rotation state.

FIG. 9 is a perspective view showing the main part of the magnetic rotating device according to the third embodiment of the present invention, and FIG. In addition, in FIG. 9 and FIG. 10, the same code | symbol is attached | subjected to the substantially same part as FIG. 7 and FIG. 8 mentioned above, and the detailed description is abbreviate | omitted.

In the above-described embodiment, a single rotor 1 is provided, whereas in this embodiment, a plurality of rotors are provided, and in this example, two rotors 1-A and 1-B are provided. In addition, the electromagnets 2-A and 2-B are provided outside the rotors 1-A and 1-B in the same manner. These electromagnets 2-A and 2-B are controlled to be driven by a microprocessor or a drive circuit as in the above-described embodiment. In addition, the rotor (1-A, 1-B) is shown that the inner permanent magnet holders (12-A, 12-B) and the electromagnets (2-A, 2-B) are installed at the same position with each other. However, these positions may be arranged differently.

In this embodiment, since the drive shaft 3 is driven to rotate by the plurality of rotors (1-A, 1-B), it is possible to increase the rotation torque of the magnetic rotating device more significantly.

Hereinafter, an embodiment according to the present invention has been described. However, the present invention is not limited to the above-described embodiments and can be carried out in various modifications without departing from the spirit thereof.

As described above, according to the present invention, it is possible to implement a magnetic rotating device that can achieve high rotational torque with low power consumption and low power by promoting efficient use of electric power.

1 is a cross-sectional view of the main portion of the magnetic rotating device according to the present invention for explaining the basic concept of the present invention.

Figure 2 is a perspective view showing the shape of the permanent magnet holder 12 in FIG.

3 and 4 are explanatory diagrams for explaining the basic concept of the present invention.

5 is a structural diagram showing an example of a structure of a rotor 1 according to the present invention and a shape in which a horseshoe type electromagnet 2 is installed to correspond to the rotor 1.

6 is a perspective view showing the main portion of the magnetic rotating device according to the first embodiment of the present invention.

Figure 7 is a perspective view showing the main portion of the magnetic rotating device according to the second embodiment of the present invention.

8 is a sectional view of the main parts of FIG. 7;

Figure 9 is a perspective view showing the main portion of the magnetic rotating device according to the third embodiment of the present invention.

10 is a sectional view of the main parts of FIG. 9;

*** Brief description of the main parts of the drawing ***

1: rotor, 2: electromagnet,

12: permanent magnet holder, 122: permanent magnet.

Claims (5)

Housings, A drive shaft rotatably supported coupled to the housing; Rotor is fixed to the drive shaft and made of a cylindrical shape, A plurality of electromagnets disposed at regular intervals from the outer circumferential surface of the rotor, And drive control means for controlling the supply of current to the electromagnet, On the inner circumferential surface of the rotor a plurality of permanent magnet holders are installed at regular intervals from each other, the permanent magnet is coupled to the permanent magnet holder, The permanent magnet and the electromagnet is a magnetic rotating device, characterized in that arranged to form a mutually inclined angle. The method of claim 1, The permanent magnet holder is disposed in pairs, the permanent magnet coupled to the pair of permanent magnet holder is set so that the polarity is opposite to each other, the electromagnet is a horseshoe type electromagnet, characterized in that. The method of claim 1, One side of the rotor is further provided with a fixed plate provided with at least one Hall element on the front, One side of the fixed plate is provided with a fixed distance to the fixed plate and is fixedly coupled to the drive shaft, the magnetic force, characterized in that the rotating plate is provided with at least one permanent magnet is installed at a position corresponding to the Hall element Rotator. The method of claim 1, Magnetic rotor device characterized in that a plurality of the rotor is provided along the longitudinal direction of the drive shaft. The method of claim 1, The drive control means is a magnetic rotating device characterized in that for supplying the current in the opposite direction to one electromagnet and the adjacent electromagnet.

Images