JPH011488A - electrostatic motor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electrostatic rotary motor.

[Summary of the invention]

The present invention applies a rectangular wave voltage of three or more phases to a comb-shaped common electrode disposed on the end face of a circular rotor and a plurality of electrodes disposed in a portion of the stator facing the comb-shaped electrodes of the rotor. The rotor is rotated by electrostatic force caused by electric charges generated on the rotor and stator electrodes.

[Conventional technology]

The most commonly used electromechanical converter is an electromagnetic motor that uses electromagnetic force. In an electromagnetic motor, a current is passed through a coil to form an electromagnet, and a rotor is rotated by the repulsion or absorption of the magnetic force generated from a permanent magnet and the magnetic force from the electromagnet.

[Problem that the invention seeks to solve]

However, since the electromagnetic motor described above passes current through the coil, the current is converted into heat, resulting in a large loss of energy, and in portable devices that only have a small amount of power, such as batteries, batteries must be replaced frequently. There wasn't. Also, recently, electromagnetic noise has been rapidly increasing in the world, and due to this electromagnetic noise,
Electromagnetic motors have a high risk of malfunction and are a source of electromagnetic noise, which is a disadvantage for users.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a comb-like common electrode on the end face of a circular rotor, and a plurality of electrodes on the stator facing the comb-like common electrode of the rotor. A three-phase rectangular wave voltage is applied to the electrodes and multiple electrodes of the stator to generate electric charges between the rotor and stator electrodes,
The rotor is rotated by electrostatic force caused by electrical charges.

[Effect]

As mentioned above, since the rotor can be rotated simply by generating electric charges, the loss of energy due to heat generation is extremely small, and since it is driven by electrostatic force, it is not affected by electromagnetic noise. Since it has a simple structure consisting of only electrodes and insulators, it can be made smaller and thinner.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. 1st
The figure is a block diagram of an electrostatic motor and a drive circuit showing an embodiment of the present invention, where 12 is a drive circuit that applies a three-phase rectangular wave voltage to an electrostatic motor 13, and 13 is a three-electrode electrode of the stator 3. (2a, 2b, 2c) and the common electrode 5 of the rotor 8
11 is a contact spring for electrically connecting the drive circuit 13 to the common electrode 5 of the rotor 8. FIG. 2 is a cross-sectional view of the electrostatic motor 13 shown in FIG. A rotor 10 has a shaft 7 formed in the center thereof, a stator 3 is fixed thereto, a rotor 8 has a bearing for the shaft 7, and a plurality of electrodes 2,
A frame 4 has a slit for allowing the contact spring 11 to escape to the outside, to which the contact spring 11 that contacts and electrically conducts with the common electrode 5 of the rotor 8 is fixed, and has a bearing for the shaft 7 of the rotor 8 . This is a presser plate fixed to 10. FIG. 3 is a plan view of both end surfaces of the rotor 8 shown in FIG.
b, 5c, 5d.

5e, 5f, 5g, and 5h are provided, and the radial electrode part becomes one ring-shaped electrode part near the axis 7, the radial electrode part 5b is arranged from the side to the other end face, and the ring-shaped electrode part is arranged near the axis 7. , and the electrode width 11 of the radial electrode portion and the width 12 of the adjacent insulator 6 are ! , : A common electrode having a relationship of β2=11, 6 a circular insulator on which the common electrode 5 is disposed, and 7 a shaft integrated with the insulator. FIG. 4 is a plan view of the surface of the stator 3 in FIG. 2 facing the rotor 8, in which 2 is an electrode with three poles, 2a is a radial electrode with a ring shape on the outside, and 2b is a ring on the inside. Radial electrode shaped like 2
c is a radial electrode having a ring shape on the outside;
The width l of each radial electrode and the width l of the adjacent insulator 1 are almost the same, and the radius 11 of the insulator 6 of the rotor 8 in FIG. The quantity ratio of the radial electrodes that match on the plane with 3 is common electrode 5: multiple electrodes 2 (2a + 2b + 2c) -2: 3
It is. FIG. 5 shows the right rotation voltage waveform of the drive circuit 12 to the electrostatic motor 13, which is applied to the three electrodes 2a, 2b, 2c of the stator 3 via the contact spring 11 with the common electrode 5 of the rotor 8 as the ground. This shows the three-phase rectangular wave voltage. FIG. 6 shows the left rotation voltage waveform of the drive circuit 12 to the electrostatic motor 13, and similarly to FIG. show. FIG. 7 shows an operation diagram for explaining the operation when the rotor 8 rotates clockwise. FIG. 8 shows an operation diagram illustrating the operation of the rotor 8 when it rotates to the left.

The operation of the embodiment having such a configuration will be explained.

When rotating the rotor 8 clockwise, the voltage shown in FIG. 5 is applied. First, when a voltage is applied to the electrode 2a, the electrode 2a
A positive charge is generated on electrodes 2a and 50, and an attractive force is generated on electrodes 5a and 50.
and 5c, negative charges are generated between the electrodes 2a and 58, and the center of the electrode 2a and the electrode 5a as shown in operation 1 in FIG.
It moves and stops until the centers of and 5c coincide.

Next, when a voltage is applied to the electrode 2b, a positive charge is generated on the electrode 2b and a negative charge is generated on the electrodes 5b and 5d, and an attractive force is generated between the center of the electrode 2b, the center of the electrode 5b, and the center of the electrode 5d. An attractive force acts in a direction that coincides with , and the rotor 8 receives the force in the direction of the arrow and acts, causing the center of the electrode 2b in operation 3 and the rotor 8
until the centers of the electrodes 5b and 5d coincide. When a voltage is further applied to the electrode 2c, an attractive force acts between the electrode 2c and the electrodes 5c and 5e of the rotor 8 in the same way as explained in operation 2.3, and the movements of operations 4 and 5 occur. The rotor 8 moves in the direction of the force shown in action 4 (in this way, electrodes 2a-=2b
When voltages are applied in the order of -e2cm=2a..., the rotor 8 rotates clockwise. Next, when rotating the rotor 8 to the left, the voltage shown in FIG. 6 is applied. First, when a voltage is applied to the electrode 2a, the positive electrode is applied to the electrode 2a, and the electrode 5a of the rotor 8 is
A negative charge is generated in the electrodes 2a and 5c, and an attractive force acts between the electrodes 2a, 5a, and 5c, causing the center of the electrodes 2a and the electrodes 5c to
It moves and stops until the center of a and the center of the electrode 2a and the center of the electrode 5c coincide. Next, when a voltage is applied to the electrode 2c, a positive charge is generated on the electrode 2c and a negative charge is generated on the electrodes 5b and 5d, creating an attractive force between the center of the electrode 2c and the electrode 5b.
An attractive force acts in a direction that coincides with the center of and the center of 5d,
The rotor 8 moves in response to the force in the direction of the arrow until the center of the electrode 2C in operation 3 and the center of the electrodes 5b and 5d of the rotor 8 coincide. When a voltage is further applied to the electrode 2b, the voltage 1
2b and between the electrodes 5a and 5C of the rotor 8, the operations 2 and 3
In the same way as explained above, the suction force acts, and the rotor 8 moves in the direction of the force shown in operation 4, performing the movement of operation 4.5. As mentioned above, electrode 2B −+ 2(-421) −28...
When voltages are applied in the order of ., the rotor 8 rotates to the left.

〔Effect of the invention〕

According to the present invention, as explained above, the rotation of the rotor 8 can be obtained simply by applying a voltage to the plurality of electrodes 2 of the stator 3 and the common electrode 5 of the rotor 8 and generating electric charges, and changing the phase of the applied voltage. The rotational direction of the rotor 8 can be easily determined arbitrarily by simply using the above-mentioned method, and the rotation of the rotor 8 can be obtained with low power consumption.

[Brief explanation of drawings]

1 is a block diagram of an electrostatic motor and drive circuit according to the present invention, FIG. 2 is a sectional view of the electrostatic motor 13 of FIG. 1, and FIGS. 3A and 3B are plan views of the rotor 8 of FIG. 2. and rear view,
FIG. 4 is a plan view of the stator 3 shown in FIG. 2, FIG. 5 is an explanatory diagram of the clockwise rotation voltage waveform of the electrostatic motor 13 of the drive circuit 12, and FIG. 6 is a counterclockwise rotation of the electrostatic motor 13 of the drive type 12. FIG. 7 is an explanatory diagram of the voltage waveform, FIG. 7 is an explanatory diagram of the clockwise rotation operation of the rotor 8 in FIG. 2, and FIG. 8 is an explanatory diagram of the counterclockwise rotation operation of the rotor 8 of FIG. 2. l...Insulator 3...Stator 2...Multiple electrodes 4...Holders 2a, 2b, 2c
...Electrode 5...Common electrodes 5a, 5b, 5c,
5d, 5e, 5f+ 5g, 5h...electrode 6
... Insulator 7 ... Shaft 8 ... Rotor 9 ... Screw 10 ... Frame 11 ... Contact spring 12 ... Drive circuit 13 ... Electrostatic motor or more Applicant Seiko Electronics Kogyo Co., Ltd. 1 ＼ Jl: J2 = 2: 1 0 Ichita Shinsenzu Rotor's city map Figure 3 (A) ε33 Figure (B) ζ5
4 Figure i Figure 5 Electrostatic top 1301 Left mouth flat fold pressure and shape force Figure 6

Claims (6)

[Claims] (1) A rotor in which electrodes that are electrical conductors are arranged on a circular insulator, and a stator that has electrodes that are electrical conductors arranged in the insulator opposite to the electrodes of the rotor with a gap between them. In an electrostatic motor, the rotor is rotated by an attractive force of charges generated between the rotor electrode and the stator electrode by applying a voltage to the rotor electrode and the stator electrode. , an electrostatic motor characterized in that the number of electrodes on the rotor and the number of electrodes on the stator are different. (2) The electrostatic motor according to claim 1, wherein when the rotor rotates, the ratio of the number of electrodes in the portion where the electrodes of the rotor and stator overlap in a plane is 2/3 or more. (3) When the insulator rotor rotates, the ratio of the length of one electrode in the rotational direction of the rotor and stator to the length of the insulator adjacent to the electrode in the area where the rotor and stator overlap in plane is the ratio between the rotor and stator. Electrostatic motor according to claim 1 of a different claim (4) the electrodes of the rotor or stator are at the same potential;
The electrostatic motor according to claim 1, wherein an AC voltage of three or more phases is applied to the other electrode. (5) The electrostatic motor according to claim 1, wherein the AC voltage is a three-phase rectangular wave voltage, and the three-phase rectangular wave voltage is applied to each of three adjacent electrodes of the stator. (6) The electrostatic motor according to claim 1, wherein the rotational direction of the rotor is changed by changing the phase of the three-phase rectangular wave voltage.