KR101200267B1 - Motor Using Permanent Magnet - Google Patents

Abstract

The present invention discloses a motor using a permanent magnet.
The present invention is a permanent magnet or electromagnet, and a rotor consisting of a rotating shaft coupled to the center of the permanent magnet or electromagnet for transmitting a rotational force;
A motor comprising: a stator made of an electromagnet provided around the rotor to form magnetization when a current is applied thereto,
The stator is a structure that further includes a permanent magnet so as to rotate the rotor by the magnetic force when the magnetization of the electromagnet in the outer direction of the electromagnet.
The present invention, in the conventional motor, further comprises a permanent magnet in the stator made of an electromagnet, when the current is not applied to the electromagnet is shielded and the magnetic force of the permanent magnet is not transmitted, the current is applied to the electromagnet magnetized When the magnetic force of the permanent magnet is combined with the magnetic force of the electromagnet and transmitted to the rotor, when the electric energy of the same input amount is achieved, the output efficiency can be further increased as compared with the related art.

Description

Motor Using Permanent Magnet

The present invention relates to a motor using a permanent magnet, and more particularly, to increase the magnetic flux density to increase the output efficiency of the motor.

In general, a motor is a rotary device that converts electrical energy into mechanical energy, and is divided into a DC motor driven by a DC power source and an AC motor driven by an AC power source.

Among these, the DC motor is composed of a stator made of a permanent magnet, and the rotor to rotate by the stator and the attraction force and repulsive force, the rotor is fixed and installed on the rotating shaft and the iron core to be rotated, It consists of a coil that makes the iron core electromagnetized by the current wound on the iron core and a commutator for periodically changing the direction of the current to the coil.

In addition, the DC motor having the opposite structure is a structure having a rotor having a permanent magnet, a stator for generating a magnetic field for the permanent magnet of the rotor, and a means for exciting the stator. Are sequentially excited to generate a rotating magnetic field, and the rotor rotates when the permanent magnet disposed on the rotor with respect to the rotating magnetic field repeats the attraction and repulsive force.

In addition, among the types of DC motors, there are a brush type and a brushless type DC motor. A brush type DC motor is provided with a brush that supplies current to a coil wound on an iron core in contact with a rotor. It is a true structure, and is further provided with a commutator for supplying the coil to change the current direction periodically.

On the other hand, the brushless DC motor is a structure without such a brush and a commutator, there is an advantage that can control a variety of speed from low to high speed to reduce mechanical or electrical noise (noise).

Most of the conventional DC motor is composed of a rotor consisting of an armature consisting of a permanent magnet or an iron core, a coil, and the like, and formed around the rotor and consisting of an armature or a stator made of a permanent magnet to supply current, As a rotating device to rotate to obtain power, the permanent magnet is provided in a limited standard, the output is also limited.

For example, in order to lower the input electrical energy, the power consumption must be lowered. To this end, the resistance (impedance) of the motor must be lowered in order to allow a large current to flow at a low voltage, and in order to lower the resistance, the coil wound around the core of the motor Reducing the number of turns can lower the resistance.

However, when the number of windings of the coil wound on the iron core is lowered as described above, the strength of the magnetic force generated here is weakened and the output is weakened by that much.

On the contrary, when the current is increased by increasing the voltage, the power consumption is also increased. When the number of windings of the coil is increased, the resistance is increased so that the strength of the magnetic force generated in the coil becomes stronger, but the input electric energy must be increased. Is higher.

If the permanent magnet is composed of stators, the permanent magnets may be arranged in two or more layers to increase the strength of the magnetic force to increase the output of the DC motor. Since the load is large, there is a problem that a lot of initial current value is required.

Therefore, the present invention is to increase the output efficiency by having a higher magnetic force strength than in the prior art even if having the same input energy.

The present invention is a permanent magnet or electromagnet, and a rotor consisting of a rotating shaft coupled to the center of the permanent magnet or electromagnet for transmitting a rotational force; A motor using a permanent magnet configured to include; a stator made of an electromagnet provided around the rotor to form a magnetization when a current is applied,

The stator has a structure in which a permanent magnet is further included to allow the rotor to rotate by combining magnetic forces during magnetization of the electromagnet in the outward direction of the electromagnet.

In addition, the structure further comprises a change means for changing the magnetic force intensity distribution pattern between the electromagnet constituting the stator and the permanent magnet.

In addition, the changing means portion is a superconductor, a structure composed of any one of a mercury compound or bismuth.

On the other hand, the present invention is a permanent magnet and a rotor consisting of a rotating shaft coupled to the center of the permanent magnet to transmit a rotational force; A pair of stators made of electromagnets are formed around the rotor to form magnetization when a current is applied,

When the electromagnet is magnetized in the outward direction of the electromagnet constituting the stator further includes a permanent magnet to combine the magnetic force to rotate the rotor,

Permanent magnets disposed in the outer direction of the electromagnet provided in the one stator has a structure arranged to face each other and the electromagnet provided in the other stator to use the magnetic force generated from both sides.

Between the electromagnet constituting the stator and the permanent magnet is a structure further comprising a change means for changing the magnetic force intensity distribution pattern of the permanent magnet.

In addition, the present invention is provided with a rotating shaft which is provided inside the housing and transmits power, and a rotor made of an electromagnet coupled to the rotating shaft;

It is disposed inside and outside the electromagnet of the rotor, the electromagnet facing the electromagnet of the rotor and the permanent magnet provided therein, the electromagnet facing the electromagnet of the rotor on the outside of the rotor and the outside thereof It is a structure configured to include; a stator made of a permanent magnet provided.

As described above, the present invention further includes a permanent magnet in a stator made of an electromagnet, and when a current is not applied to the electromagnet, the magnetic shield of the permanent magnet is not transmitted and a current is applied to the electromagnet. When the magnetization is made, since the magnetic force of the permanent magnet is combined with the magnetic force of the electromagnet and transmitted to the rotor in an increased magnetic flux density, the output efficiency can be further increased compared to the conventional case in the case of electric energy of the same input amount. It works.

In addition, even if the rotor is composed of an electromagnet and the permanent magnet and the electromagnet constituting the stator in the inside and the outside of the rotor is similarly driven, when the current is not applied to the electromagnet, the magnetic force of the permanent magnet is not transmitted. When the current is applied to the temporary electromagnet and the magnetization is performed, the magnetic force of the permanent magnet is combined with the magnetic force of the electromagnet and transmitted to the rotor in a state where the magnetic flux density is increased, so that the output efficiency can be increased as compared with the conventional art.

1 is a schematic view for explaining an embodiment of a motor of the present invention.
2 is a schematic view for explaining another embodiment of the motor of the present invention.
3 is a schematic view for explaining another embodiment of the motor of the present invention.
4 is a schematic view from above of FIG. 3.
FIG. 5 is a schematic view showing a structure in which the change means part is further included from FIG. 3.
6 is a schematic diagram showing another embodiment of the motor of the present invention.
FIG. 7 is a schematic view showing still another embodiment of the motor of the present invention, in which a change means part is further included in FIG. 6.
8 is a schematic diagram showing another embodiment of the motor of the present invention.
9 is a view schematically showing the arrangement of the rotor of FIG. 8.
FIG. 10 is an explanatory diagram showing a change in a magnetic field when two general permanent magnets are combined.

Specific details for carrying out the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view for explaining an embodiment of a motor of the present invention. As shown in the figure, the motor according to an embodiment of the present invention consists of a rotor 20 in the interior of the housing 10, and a stator 30 provided around the rotor 20.

The housing 10 is made of a metal material which is a magnetic body.

The rotor 20 is composed of a permanent magnet 21 is formed in the center of the permanent magnet 21, the rotating shaft 22 for power transmission. However, the present invention is not limited thereto, and the rotor 20 may be an electromagnet instead of the permanent magnet 21.

In addition, the stator 30 has a structure composed of an electromagnet 33 composed of an iron piece 31 and a coil 32 wound on the iron piece 31.

Here, the present invention has a structure further provided with a permanent magnet 40 in the outward direction of the electromagnet 33 constituting the stator 30. In other words, the stator 30 is composed of an electromagnet 33 and a permanent magnet 40.

As is well known, permanent magnets are magnets that generate and maintain stable magnetic field energy (that is, magnetic force) without being supplied with energy from the outside, and are magnets having fixed electric and magnetic fields. In the case of combining two permanent magnets having the same magnitude of magnetic force intensity distribution, the change in the magnetic force intensity distribution is shown in FIG. 10.

For example, if the magnitudes of the magnetic force distributions (a, b, c, d) of each pole are the same as '10', the magnetic force distributions (a, b, c and d) have a size of '10', respectively, and as shown in (b), the magnetic force intensity distributions (e, g) at both ends of the poles are increased. If the magnitudes of the intensity distributions (e, g) are '14', respectively, the magnitude of the magnetic force intensity distribution (f) between the magnets is '12', and when fully combined as shown in (c), they are subdivided into two poles, The magnitudes of the magnetic field strength distributions h and i of these two poles are respectively '20'.

Therefore, the total size of the magnetic force intensity distribution does not change, but when two magnets are combined, the magnitude of the magnetic force intensity distribution occurring at both poles of the combined magnets increases, and according to the external magnetic force, You can see that the pattern changes.

In one embodiment of the present invention, by further comprising the permanent magnet 40 to use the characteristics of the magnet as described above (characteristic that the size of the magnetic force intensity distribution of each pole increases when the magnets are combined), the permanent magnet When the magnetic force of 40 is magnetized by applying an electric current to the electromagnet 33, the magnetic force is added to form a stronger magnetic force (increasing magnetic flux density) and further by mutual magnetic field relationship (gravity and repulsive force) with the rotor 20. It is to increase the output efficiency.

As is known, the formula for the rotational force τ of the motor is shown in Equation 1 below.

Where τ is the rotational force, I is the current, B is the magnetic flux density, N is the number of turns of the coil, and θ is the angle between the magnetic field and the coil.

As shown in Equation 1, it can be seen that the rotational force τ of the motor is proportional to the magnitude of the magnetic flux density B. That is, the larger the magnetic flux density B, the greater the rotational force τ of the motor.

In other words, since the electromagnet 33 does not form a magnetic force in the state where no current is applied, it is the same as putting the permanent magnet 40 on one side of the iron plate.

As is known, when a magnet is placed on one side of an iron plate and a material having a property of adhering to a magnet is placed close to the opposite side of the iron plate, the magnetic force of the magnet penetrates the iron plate and is shielded with little effect on the material.

Therefore, in this case, the permanent magnet 40 always has a magnetic field while a magnetic field is formed, because in the state that the electricity is not applied to the electromagnet 33, since the electromagnet 33 only acts like an iron plate Blocked by, the magnetic field of the permanent magnet 40 has little effect on the rotor 20 located on the inner surface of the electromagnet 33. That is, the condition is almost the same as the permanent magnet 40 does not exist.

However, in order to operate the motor, when an electric current is applied, the electromagnet 33 provided in the housing 10 gradually magnetizes and a magnetic force is formed, and when the magnetic force is maximized over time, it simply shields a magnetic field such as an iron plate. The role is lost, and combined with the magnetic force of the permanent magnet 40 disposed on the back of the electromagnet 33, the rotation is smoothed by the action of the rotor 20 and the attraction force and repulsive force with a stronger magnetic force.

On the other hand, the present invention is another embodiment, as shown in Figure 2, the stator (30) is. The magnetic force intensity distribution pattern can be changed between the electromagnet 33 and the permanent magnet 40, and a change means 50 having a shielding function can be further provided.

The change means unit 50 uses a diamagnetic material such as gold, silver, copper, copper, aluminum, antimony, bismuth, or the like, or a metal compound, a mercury compound, an alloy of niobium and germanium, including neodymium, lanthanum, and the like. Use a material used as a superconductor, such as.

In addition, the change means unit 50 may be configured by inserting a material that is used as a semi-magnetic material or a superconductor into a plate made of a magnetic material having a predetermined thickness while having a magnetizing property in a magnetic field.

In addition, the change means unit 50 may be formed by forming one or more grooves in the plate, and inserting a substance that is used as a diamagnetic material or superconductor in the grooves in powder form (or liquid, solid mass, etc.).

However, the present invention is not limited thereto and can be configured in various other forms.

As is known, a material used as a diamagnetic material or a superconductor is a material showing a diamagnetic property, and refers to a material that is magnetized in the opposite direction to the external magnetic field by an external magnetic field. In addition, shielding the magnetic field means that the magnetic field having the same size as the external magnetic field is made in the opposite direction so that the external magnetic field does not penetrate the inside.

In particular, the superconductor is a conductor that exhibits a superconductivity phenomenon in which the electrical resistance approaches '0' at a certain temperature. The superconductor cannot enter a magnetic field and pushes out an internal magnetic field. In this case, by forming a magnetic field of exactly the same size as the external magnetic field in the opposite direction, it serves to prevent the magnetic field from penetrating the inside (shielding role).

In the embodiment shown in Fig. 2, in the state in which no electric current is applied to the electromagnet 33, the electromagnet 33 plays a role of shielding the magnetic field of the permanent magnet 40 by the electromagnet 33, which acts like an iron plate. Since the part 50 is provided between the electromagnet 33 and the permanent magnet 40, when a current is applied to the electromagnet 33 to completely magnetize, the change means unit 50 is a diamagnetic material as described above. (B) The characteristics of the material used as the superconductor (the external magnetic field does not penetrate into the interior) and the characteristics of the magnetic force intensity distribution of the permanent magnet (the pattern of the magnetic force intensity distribution may change, but in any case, the total size of the magnetic force distribution varies. The magnetic force intensity distribution pattern by the magnetic field generated from the permanent magnet 40 is changed using

In other words, since the external magnetic field does not penetrate at the position where the change means unit 50 is formed, the corresponding magnetic field is distributed in the same size at different positions, and thus the magnetic force intensity distribution pattern of the permanent magnet 40 is determined by the electromagnet ( To 33). The changed magnetic force intensity distribution pattern is moved to the magnetized electromagnet 33 to be combined to generate a stronger magnetic force, thereby increasing the rotational torque of the rotor 20, thereby increasing the output efficiency of the motor.

In addition, as shown in Figure 3, the present invention, as another embodiment, and the rotor (120) 130 that is rotated in the interior of the housing (100, 110) facing each other in pairs, The stator 140, 150 is fixed to the periphery of the rotor 120, 130, respectively.

The housing 100 is made of a magnetic metal material that can be magnetized,

In addition, the rotor (120, 130) has a structure consisting of a rotating shaft (121, 131) for transmitting a rotational force, and permanent magnets 122, 132 coupled to the rotating shaft (121, 131) to be rotated to be.

In addition, the stators 140 and 150 are electromagnets 141 and 151 disposed around the permanent magnets 122 and 132 of the rotors 120 and 130 and the electromagnets 141 and 151. It consists of permanent magnets (142, 152) disposed in the outward direction.

Among the permanent magnets 142 and 152 constituting the stator 140 and 150, the permanent magnets 142 and 152 disposed at the contact portions of the housings 100 and 110 are arranged at different poles. . Therefore, by forming the magnetic field by the attraction force to each other with the housing (100, 110) in between, it is configured as if two permanent magnets become one permanent magnetization.

In addition, as shown in FIG. 5, the changing means unit 143 and 153 may be further provided between the electromagnets 141 and 151 and the permanent magnets 142 and 152.

The change means unit 143, 153 may use a diamagnetic material such as gold, silver, copper, copper, aluminum, antimony, bismuth, or the like, or a metal compound including mercury, lanthanum, and the like Use a material that is used as a superconductor, such as an alloy of nium.

In addition, the change means unit 143, 153 has a property of magnetizing in the magnetic field to form one or more grooves on the surface of the magnetic material having a predetermined thickness, so that the material used as a semi-magnetic material or superconductor in the groove formed in the form of powder (Or liquid, solid mass, etc.) can be inserted and configured. However, the present invention is not limited thereto and can be configured in various other forms.

In addition, as shown in FIG. 4, the rotation shafts 121 and 131 couple gears 121a and 131a to their ends, respectively, and the transmission gear 160 between the gears 121a and 131a. Combination to receive power transmission, the transmission shaft 160 is connected to the center of the transmission gear 160 is to transmit power. However, other means besides such power transmission means can be taken.

This embodiment of the present invention, as shown in Figure 3, before the current is applied to the electromagnets (141, 151) constituting the stator (140, 150) (the embodiment with reference to Figures 1 and 2) Similarly, since the permanent magnets 142 and 152 are disposed outside the electromagnets 141 and 151 to perform shielding roles, the magnetic fields of the fixed permanent magnets 142 and 152 are rotated 120 and 130. If the magnetization is made while the electric current is applied to the electromagnets 141 and 151, the magnetic force of the permanent magnets 142 and 152 is added to the rotor 120 and 130. By increasing the rotational torque by giving a stronger magnetic force it is possible to improve the output efficiency.

In addition, as shown in Figure 5, between the electromagnets (141) 151 and the permanent magnets 142, 152 may be further provided with a change means portion 143, 153, the change means portion ( 143) and 153 are the characteristics of the material used as the diamagnetic material or superconductor as described above (the external magnetic field does not penetrate into the inside) and the characteristics of the magnetic force intensity distribution of the permanent magnet (the pattern of the magnetic force intensity distribution varies, In any case, the magnetic force intensity distribution pattern by the magnetic field generated from the permanent magnets 142 and 152 of the stator 140 and 150 is changed using the characteristic that the overall size of the magnetic force intensity distribution is not changed.

In other words, since the external magnetic field does not penetrate at the position where the change means 143, 153 is formed, the magnetic field of the permanent magnets 142, 152 because the corresponding magnetic field is distributed in the same size at different positions. The intensity distribution pattern is changed more toward the electromagnets 141 and 151. The changed magnetic force intensity distribution pattern is moved toward the magnetized electromagnets 141 and 151 to be combined to generate a stronger magnetic force, thereby increasing the rotational torque of the rotors 120 and 130 and thus outputting the motor. Efficiency is increased.

Furthermore, the permanent magnets 142 and 152 respectively provided at the portions where the two housings 100 and 110 are in contact with each other are disposed so that the pole portions having different polarities face each other, thereby interposing the housings 100 and 110 therebetween. Since two permanent magnets can form a magnetic field as one permanent magnet while the attraction force acts on each other, a stronger magnetic force distribution pattern can be formed to increase the rotational torque of the rotors 120 and 130.

On the other hand, Figure 6 is a view showing another embodiment of the present invention, as shown in the figure, the rotor 210 is rotated inside the housing 200, and formed around the rotor 210 It consists of a stator 220, the rotor 210 is a rotating shaft 211 for transmitting power, the permanent magnet 212 to be combined with the rotating shaft 211 and the permanent magnet 212 It is composed of an electromagnet 213 disposed around the perimeter.

In addition, the stator 220 is composed of an electromagnet 221 and a permanent magnet 222 disposed outside the electromagnet 221.

In addition, as shown in FIG. 7, the change means unit 223 may be further provided between the electromagnet 221 constituting the stator 220 and the permanent magnet 222.

Since the change means unit 223 is configured in the same manner as the change means unit 50, 143 and 153 mentioned in the above embodiments, a detailed description thereof will be omitted.

On the other hand, Figure 8 is a view showing another embodiment of the present invention, as shown in the drawing, the stator 310 and the rotation is provided between the stator 310 in the interior of the housing 300 Electron 320 is provided, the stator 310 is arranged in order from the outermost to the permanent magnet 311 and the electromagnet 312, the electromagnet 313 and the permanent magnet 314 is arranged inside do.

In addition, the rotor 320 includes a plurality of electromagnets 321 disposed in the circumferential direction between the electromagnet 312 and the electromagnet 313 constituting the stator 310.

As shown in FIG. 9, the electromagnet 321 is connected to the rotating shaft 322 to transmit power. The electromagnet 321 is coupled to the rotating shaft 322 to allow a plurality of electromagnets 321 to be provided in the circumferential direction. The unit 323 has a structure provided. In addition, the body portion 323 has a structure formed in a circular shape.

Furthermore, the permanent magnet 311 and the electromagnet 312 are disposed in the outer position while the stator 310 is formed, and the electromagnet 313 and the permanent magnet 314 are also surrounded by the body 315 in the inner position. It has a structure provided in the direction.

However, the coupling structure between the stator 310, the rotor 320, and the rotation shaft 322 described with reference to FIG. 9 is schematically illustrated and described, and is not limited to this structure, but the stator 310 and the rotor 320 may be formed. The coupling structure can be implemented in various structures.

8, the permanent magnet 314 and the electromagnet 313 disposed in the center direction, and the electromagnet 312 and the permanent magnet disposed in the outward direction are configured as shown in FIG. 8. The electromagnet 321 constituting the rotor 320 is disposed between the 311 and when electricity is supplied, the electromagnets 313 and 312 constituting the stator 310 are magnetized, and at the same time the electromagnet ( 313 and 312 are combined with the magnetic forces of the permanent magnets 314 and 311 respectively disposed inside and outside of the 312 to generate a stronger magnetic force to rotate the magnetized rotor 320.

In the embodiment of the present invention, a two-pole motor has been representatively described, but of course, it is also applicable to a motor having a different number of poles (such as four poles).

The motor shown and described in the embodiment of the present invention is a DC motor, which is applicable to both a brush type motor or a brushless type motor, and the like, in the case of a brush type, a brush and a commutator are provided. In the omitted state, the configuration and operation of the stator and the rotor are described.

In addition, when the permanent magnet is composed of a rotor, rotational driving is possible while turning on / off the electromagnet constituting the corresponding stator, and when the electromagnet is composed of the rotor, the polarity of the electromagnet is alternately changed to rotate. It is configured to be able to drive. When the polarity of the electromagnet is alternately changed, the brush and the commutator are driven to change the polarity of the electromagnet. Since the technique is a known technique applied to a general motor, a detailed description thereof will be omitted.

Although the present invention has been described for the embodiments of the present invention based on the accompanying drawings for convenience, various modifications and variations are possible without departing from the scope of the technical idea of the present invention, and such variations and modifications are claimed in the present invention. Inclusion in the scope is obvious.

10: Housing
20: rotor
21: permanent magnet
22: rotating shaft
30: stator
31: iron piece
32: coil
33: electromagnet
40: permanent magnet
50: change means
60,70: rotor
61,71: Permanent magnet
62,72: axis of rotation
80,90: Stator
81,82,91,92: Electromagnets
83,93: Permanent Magnet
100: permanent magnet
110,120,130,140: change means
200: housing
210: rotor
211: rotation axis
212 permanent magnet
213: electromagnet
220: stator
221: electromagnet
222 permanent magnet
223: means of change
300: housing
310: Stator
311: permanent magnet
312: electromagnet
313: electromagnet
314: permanent magnet
315 body
320: rotor
321: Electromagnet
322: axis of rotation
323: body part

Claims (9)

A rotor comprising a permanent magnet or an electromagnet, and a rotating shaft coupled to the center of the permanent magnet or electromagnet to transmit rotational force;
A motor using a permanent magnet configured in the housing, including; a stator made of an electromagnet provided around the rotor and configured to form magnetization when current is applied thereto.
The stator includes a permanent magnet so as to rotate the rotor by adding magnetic forces when magnetizing the electromagnet in the outward direction of the electromagnet;
Further comprising a change means for changing the magnetic force intensity distribution pattern between the electromagnet constituting the stator and the permanent magnet,
The change means unit is a motor using a permanent magnet, characterized in that by inserting a material that is used as a diamagnetic material or superconductor into a plate made of a magnetic material.
delete delete A rotor comprising a permanent magnet or an electromagnet, and a rotating shaft coupled to the center of the permanent magnet or electromagnet to transmit rotational force;
A motor using a permanent magnet configured in the housing, including; a stator made of an electromagnet provided around the rotor and configured to form magnetization when current is applied thereto.
The stator includes a permanent magnet so as to rotate the rotor by adding magnetic forces when magnetizing the electromagnet in the outward direction of the electromagnet;
Further comprising a change means for changing the magnetic force intensity distribution pattern between the electromagnet constituting the stator and the permanent magnet,
The change means unit is formed by forming a plurality of grooves in the magnetic plate, a motor using a permanent magnet, characterized in that by inserting a material that is used as a semi-magnetic material or superconductor in the groove formed.
A housing which makes a pair and faces each other;
A rotor having a permanent magnet and a rotating shaft coupled to a center of the permanent magnet and transmitting a rotational force, respectively provided in the housing;
It is composed of a stator made of an electromagnet provided around the rotor to form magnetization when an electric current is applied,
When the electromagnet is magnetized in the outward direction of the electromagnet constituting the stator further includes a permanent magnet to combine the magnetic force to rotate the rotor,
Each permanent magnet constituting the stator provided in each housing is arranged to face each other with different polarities so that the magnetic force strength is increased,
Between the electromagnet constituting the stator and the permanent magnet, the change means for changing the magnetic force intensity distribution pattern of the permanent magnet is further included.
The change means unit is a motor using a permanent magnet, characterized in that by inserting a material that is used as a diamagnetic material or superconductor into a plate made of a magnetic material.
delete A rotor comprising a rotating shaft provided inside the housing to transmit power, a permanent magnet coupled to the rotating shaft to rotate, and an electromagnet disposed around the outer side of the permanent magnet;
A stator comprising an electromagnet disposed around the outer circumference of the electromagnet of the rotor and a permanent magnet disposed around the outer direction of the electromagnet,
The stator further includes a change means portion disposed between the electromagnet and the permanent magnet,
The change means unit is a motor using a permanent magnet, characterized in that by inserting a material that is used as a diamagnetic material or superconductor into a plate made of a magnetic material.
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