JP2008178235A - Plasma motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma motor with a small and simple structure. <P>SOLUTION: When corona discharge is produced between tips of a pair of needle electrodes 6 and a stator 1 by turning on a switch 8 and applying high voltage between a rotation shaft 3 of a rotor 2 and the stator 1 by a high voltage power supply 7, plasma is formed near the tip parts of the needle electrodes 6. Ionized air flows to the stator 1 and ion wind is generated. The needle electrodes 6 receive reaction force of ion wind. Since a pair of the needle electrodes 6 bends in the same direction with respect to a rotary direction of the rotor 2, moment in the same direction is generated in the rotation axis 3 by reaction force that both needle electrodes 6 receive, and the rotor 2 rotates with the rotation shaft 3 as a center. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plasma motor, and more particularly to a motor that rotates a rotor using ion wind generated by the formation of plasma.

Conventionally, an electric motor that generates a driving force by using a force generated by an interaction between a magnetic field and an electric current is widely known. However, a coil is required to generate a magnetic field or to pass an electric current, which makes it difficult to reduce the size. there were.
On the other hand, for example, Patent Document 1 discloses a corona motor that obtains a driving force using a Coulomb force. This corona motor generates corona discharge between a stator having discharge electrodes and a rotor having a dielectric to charge the dielectric of the rotor, and rotates the rotor by Coulomb force.

JP 2002-346579 A

This type of corona motor is called a disk-type corona motor because the stator and the rotor are formed in a plate shape, and can be miniaturized.
However, in order to rotate the rotor, it is necessary to locally charge the surface of the dielectric of the rotor positively and negatively. For this reason, a large number of stator discharge electrodes are formed along the direction of rotation of the rotor. The positive and negative voltages must be applied alternately by dividing, which has a problem that the configuration becomes complicated.

  The present invention has been made to solve such problems, and an object thereof is to provide a small and simple plasma motor.

  A plasma motor according to the present invention includes a stator, a rotor rotatably disposed with respect to the stator, a needle electrode disposed on one of the stator and the rotor, a stator, High voltage applying means for applying a high voltage between the other of the rotors and the needle-like electrode to form plasma in the vicinity of the needle-like electrode to generate an ion wind to rotate the rotor. It is a thing.

The needle-like electrode can be arranged on the rotor so as to be tangential to the rotation direction of the rotor and facing backward.
Alternatively, the needle-like electrode is arranged on the stator, and the rotor is arranged in an annular shape so as to surround the stator, and each has a plurality of blade members that are inclined in the same direction with respect to the rotation direction of the rotor. You can also
Moreover, the some acicular electrode may be provided in one of the stator and the rotor.
Furthermore, as a high voltage applying means, a high voltage gun that generates corona discharge between the rotor or the stator on which the needle-like electrodes are disposed can be used.

  According to this invention, the needle-like electrode is disposed on one of the stator and the rotor, and a high voltage is applied between the other of the stator and the rotor and the needle-like electrode by the high voltage applying means. Then, plasma is formed in the vicinity of the needle-like electrode, and ion wind is generated to rotate the rotor. Therefore, a small motor can be realized with a simple configuration.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1
1 and 2 show the configuration of the plasma motor according to the first embodiment. A rotor 2 is disposed inside a cylindrical stator 1. The rotor 2 is rotatably disposed on a support base 4 around a rotation shaft 3 located at the center of the stator 1, and a pair of arm portions 5 extending from the rotation shaft 3 in directions opposite to each other; A pair of needle-like electrodes 6 bent at right angles from the tips of the respective arm portions 5 are provided. The pair of needle-like electrodes 6 are bent in the same direction so as to be tangential to the rotation direction of the rotor 2 and facing backward.

In addition, the stator 1 is electrically grounded, one end of the high voltage power source 7 is electrically connected to the rotating shaft 3 of the rotor 2, and the other end of the high voltage power source 7 is connected to the stator via the switch 8. 1 is electrically connected. The high voltage power supply 7 and the switch 8 constitute high voltage applying means.
In addition, the stator 1, the rotating shaft 3, the arm part 5, and the needle electrode 6 of the rotor 2 are each formed from a conductor, and the support base 4 is formed from an insulator. The plasma motor is assumed to be placed in the air.

  Next, the operation of the first embodiment will be described. The switch 8 is turned on and a high voltage is applied between the rotating shaft 3 of the rotor 2 and the stator 1 by the high voltage power source 7, so that the tip portion of the pair of needle electrodes 6 and the stator 1 are interposed. When corona discharge is generated, plasma is formed in the vicinity of the tip of these needle-like electrodes 6, and ionized air flows toward the stator 1 along the lines of electric force indicated by broken lines in FIG. That is, an ion wind is generated from the tip of the needle electrode 6 toward the stator 1, and the needle electrode 6 receives a reaction force of the ion wind. Here, since the pair of needle-like electrodes 6 are bent in the same direction with respect to the rotation direction of the rotor 2, the pair of needle-like electrodes 6 have the same direction on the rotary shaft 3 due to the reaction forces received by both needle-like electrodes 6. A moment is generated, and the rotor 2 rotates about the rotation axis 3 as indicated by a solid arrow in FIG.

Thus, in the plasma motor according to the first embodiment, the rotor 2 having the needle-like electrode 6 is disposed inside the cylindrical stator 1, and a high voltage is applied between the stator 1 and the rotor 2. The rotor 2 can be rotated with a small and simple configuration in which a high voltage is applied from the power source 7.
In addition, although the plasma motor was mounted in air, it is not restricted to this, It can also be mounted in atmosphere other than air. For example, if the plasma motor is operated in a nitrogen atmosphere, a flow of ionized nitrogen molecules is formed, and the rotor 2 is rotated by the reaction force.

Embodiment 2
FIG. 3 shows the configuration of the plasma motor according to the second embodiment. Four needle-like electrodes 12 extending radially outward are arranged on the stator 11, and a rotor 13 is arranged on the outer periphery of the stator 11. The rotor 13 has a plurality of blade members 14 arranged in an annular shape so as to surround the stator 11, and is arranged so as to be rotatable around the center of the annular arrangement of the blade members 14. The plurality of blade members 14 are inclined at the same angle in the same direction with respect to the rotation direction of the rotor 13. As shown in FIG. 4, each needle electrode 12 of the stator 11 extends radially within the rotation surface of the rotor 13, and the rotor 13 has a substantially cylindrical overall shape.

In addition, each blade member 14 of the rotor 13 is electrically grounded, and one end of the high voltage power source 7 is electrically connected to each needle electrode 12 of the stator 11, and the other end of the high voltage power source 7 is The switch 8 is electrically connected to each blade member 14 of the rotor 13 through the switch 8.
Each needle-like electrode 12 and each blade member 14 are each formed of a conductor, and this plasma motor is placed in the air.

When the switch 8 is turned on and a high voltage is applied between the stator 11 and the rotor 13 by the high voltage power source 7, corona discharge is generated between the tip of each needle electrode 12 and each blade member 14. As a result, plasma is formed in the vicinity of the tip of each needle electrode 12, and ionized air flows toward each blade member 14 of the rotor 13 along the lines of electric force indicated by broken lines in FIG. Here, since each blade member 14 is inclined by the same angle in the same direction with respect to the rotation direction of the rotor 13, the ionized air collides with each blade member 14, whereby each blade member 14. A moment in the same direction is generated at the same time, and the rotor 13 rotates.
Thus, even if the needle-like electrode 12 is arranged on the stator 11 and the plurality of blade members 14 of the rotor 13 are arranged in an annular shape so as to surround the stator 11, the rotor 13 can be rotated.

Embodiment 3
In the first embodiment described above, the high voltage power supply 7 and the switch 8 constitute a high voltage applying means, and one end of the high voltage power supply 7 is electrically connected to the rotating shaft 3 of the rotor 2 to apply a high voltage. However, as shown in FIG. 5, the high voltage gun 15 can also be used as a high voltage applying means. The high-voltage gun 15 has a high-voltage power source and a corona electrode inside, and generates no corona discharge between the corona electrode and the rotating shaft 3 of the rotor 2, thereby making no contact with the rotor 2. In this state, the potential of the rotor 2 is increased. By using this high voltage gun 15 to increase the potential of the rotor 2, corona discharge is generated between the tip of the needle-like electrode 6 of the rotor 2 and the stator 1, and ion wind is generated. 2 rotates.
Thus, if the high voltage gun 15 is used as the high voltage applying means, a motor having no contact is realized.
In addition, this Embodiment 3 is applied to Embodiment 2 mentioned above, the electric potential of the four acicular electrodes 12 of the stator 11 is raised using the high voltage gun 15 instead of the high voltage power supply 7, and each needle | hook is increased. The rotor 13 can also be rotated by generating corona discharge between the tip of the electrode 12 and each blade member 14.

Embodiment 4
FIG. 6 shows a display device according to the fourth embodiment. In this display, the first disk 16 is fixed to the pair of arms 5 of the rotor 2 of the plasma motor according to the third embodiment described above, and is positioned at the back of the first disk 16. A second disk 18 is fixed to the support base 17. The first disk 16 fixed to the rotor 2 is formed with a plurality of openings 19 and 20 having different distances and sizes from the rotation shaft 3, and the first disk 16 fixed to the support base 17. On the surface of the second disk 18, characters, pictures, marks, and the like that are objects to be displayed are drawn over a wide range. The openings 19 and 20 of the first disk 16 are formed smaller than the size of the display object drawn on the surface of the second disk 18, and pass through any one of the openings. Alone, the entire display object cannot be viewed from the front side.

  Here, by increasing the potential of the rotor 2 using the high-voltage gun 15, corona discharge is generated between the tip of the needle electrode 6 of the rotor 2 and the stator 1 to rotate the rotor 2. As a result, the first disk 16 rotates together with the arm portion 5. Since the plurality of openings 19 and 20 also rotate with the rotation of the first disk 16, when viewed from the front side where the high voltage gun 15 is disposed, the second circle is caused by the flash effect (afterimage effect). The entire display object drawn on the surface of the plate 18 can be visually observed. As a result, the display object can be displayed.

  Although the display device of the fourth embodiment is configured using the plasma motor of the third embodiment, the display device can also be configured using the plasma motor of the first or second embodiment in the same manner.

The plasma motor according to the present invention can rotate the rotor with a small and simple configuration.
Also, unlike conventional motors that use coils, the rotor is forced to rotate for some reason when a high voltage is applied between the stator and the rotor from a high-voltage power supply or a high-voltage gun. Even if stopped, there is an advantage that it does not become a load of a high-voltage power supply or a high-voltage gun, and heat loss is small.

Example 1
As shown in FIG. 7, a rotor 25 having a pair of arm portions 23 and needle-like electrodes 24 is rotatably disposed on a ground plate 21 via a support portion 22 made of an insulating material. A cylindrical earth ring 26 serving as a stator is disposed around the periphery. The earth plate 21 and the earth ring 26 were electrically grounded, and the needle-like corona electrode 28 of the high voltage gun 27 was made to face the rotating shaft of the rotor 25. When the switch 29 is turned on, a corona discharge is generated between the corona electrode 28 of the high-voltage gun 27 and the rotating shaft of the rotor 25 to increase the potential of the rotor 25, and the tip of the needle electrode 24 and the earth ring 26 are Corona discharge occurs in the meantime to generate ion wind, and the rotor 25 rotates.

Here, the diameter D1 of the earth ring 26 is 70 to 100 mm, the height H is 50 mm, the gap G1 is 5 mm from the earth plate 21, the gap G2 is 10 mm between the corona electrode 28 and the rotating shaft of the rotor 25, and the earth plate 21 is. The diameter D2 was 150 mm. Further, as shown in FIG. 8, the total length L1 of the pair of arm portions 23 of the rotor 25 is set to 45 mm, and the length L2 of the needle electrode 24 is set to 4 mm.
Then, when a rotation experiment was performed with the high voltage HV applied to the corona electrode 28 of the high voltage gun 27 = 40 kV and the current I flowing through the corona electrode 28 = 80 μA, it was confirmed that the rotor 25 rotated well.
In addition, it was confirmed that the rotor 25 rotates well even if the earth ring 26 is removed. When the earth ring 26 is removed, the earth plate 21 acts as a stator, and it is assumed that corona discharge occurs between the tip of the needle electrode 24 and the earth plate 21 to generate ion wind. .

Example 2
As shown in FIG. 9, three arm portions 31 are fixed to the rotation shaft at an angle of 120 degrees with each other, and needle-like electrodes 32 bent at right angles are arranged at the distal end portions of the respective arm portions 31. A rotation experiment was performed using the same apparatus as in Example 1 except that the rotor 33 was used. However, the length L3 of each arm 31 is 85 mm, the length L2 of the needle electrode 32 is 10 mm, the diameter D1 of the earth ring 26 is 190 mm, the height H is 50 mm, the corona electrode 28 and the rotor 33 are The distance G2 from the rotating shaft was set to 10 mm, and the diameter D2 of the ground plate 21 was set to 250 mm.
When the high voltage HV applied to the corona electrode 28 of the high voltage gun 27 was set to 30 kV and the current I flowing through the corona electrode 28 was set to 80 μA, it was confirmed that the rotor 33 rotated well.
When the earth ring 26 is removed, the rotor 33 rotates well when the high voltage HV applied to the corona electrode 28 of the high voltage gun 27 is 30 kV and the current I flowing through the corona electrode 28 is 26 μA. It was confirmed.

Example 3
As shown in FIG. 10, the rotating shaft of the rotor 33 used in the second embodiment is electrically grounded, a spherical electrode 34 is disposed so as to face the rotor 33, and a switch 35 is connected to the spherical electrode 34. A high voltage power supply 36 having a voltage of 50 kV was connected thereto.
When a rotation experiment was performed by varying the distance between the rotor 33 and the spherical electrode 34, it was confirmed that the rotor 33 rotated well even when the rotor 33 and the spherical electrode 34 were separated by about 50 to 150 mm. It was.
Moreover, when the rotor 25 used in Example 1 was used instead of the rotor 33, it was confirmed that the rotor 33 rotated similarly similarly.

It is a top view which shows the structure of the plasma motor which concerns on Embodiment 1 of this invention. 1 is a cross-sectional view showing a configuration of a plasma motor according to Embodiment 1. FIG. 6 is a plan view showing a configuration of a plasma motor according to Embodiment 2. FIG. FIG. 6 is a perspective view schematically showing a configuration of a plasma motor according to a second embodiment. 6 is a perspective view showing a configuration of a plasma motor according to Embodiment 3. FIG. FIG. 6 is a perspective view illustrating a configuration of a display device according to a fourth embodiment. 1 is a cross-sectional view illustrating a configuration of a plasma motor according to Embodiment 1. FIG. 1 is a plan view illustrating a configuration of a plasma motor according to Embodiment 1. FIG. 6 is a plan view illustrating a configuration of a plasma motor according to Embodiment 2. FIG. It is a perspective view which shows roughly the structure of the plasma motor which concerns on Example 3. FIG.

Explanation of symbols

  1,11 Stator, 2,13,25,33 Rotor, 3 Rotating shaft, 4,17 Support base, 5,23,31 Arm part, 6,12,24,32 Needle-like electrode, 7,36 High voltage Power supply, 8, 29, 35 switch, 14 blade member, 15, 27 high voltage gun, 16 first disc, 18 second disc, 19, 20 opening, 21 ground plate, 22 support, 26 ground Ring, 28 Corona electrode, 34 Spherical electrode.

Claims (5)

A stator,
A rotor disposed rotatably with respect to the stator;
A needle electrode disposed on one of the stator and the rotor;
A high voltage is applied between the other of the stator and the rotor and the needle electrode to form a plasma in the vicinity of the needle electrode, thereby generating an ion wind to rotate the rotor. And a high voltage applying means.   2. The plasma motor according to claim 1, wherein the needle-like electrode is disposed on the rotor so as to be tangential to the rotation direction of the rotor and facing rearward. The needle electrode is disposed on the stator;
The plasma motor according to claim 1, wherein the rotor includes a plurality of blade members that are arranged in an annular shape so as to surround the stator and are inclined in the same direction with respect to the rotation direction of the rotor.   The plasma motor according to any one of claims 1 to 3, wherein the plurality of needle-like electrodes are provided on one of the stator and the rotor.   The said high voltage application means consists of a high voltage gun which produces a corona discharge between the said rotor or the said stator with which the said acicular electrode was arrange | positioned. Plasma motor.

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