JPH07107745A - 12-phase ac power supply device and 12-electrode high-density discharge device using same - Google Patents

Abstract

PURPOSE:To make it possible to change the phase simply from three-phase AC into 12-phase AC by forming a star-star connection, and utilizing the fact that the angular displacement of star-delta connection is 30 deg.. CONSTITUTION:At first, the lines from neutral points o1 are guided out. Terminals u1, v1 and w1 and the neutral points o1 of a star-connection power supply part(SP) P formed by performing star connection and the primary-side terminals of single-phase transformers S1, S7, S9, S3, S5 and S11 of a star- connection group(SG) Y undergo star connection. Therefore, the output AC voltages of secondary-winding terminals 1, 9 and 5 become the same phase as an input three-phase AC voltage E, and the magnitude also becomes equal. Intermediate terminals u2, v and w2 of the SPP and the primary-side terminals of single-phase transformers S2, S8, S10, S4, S6 and S12 of a delta connection group(DG) D undergo delta connection. Therefore, the phase of the output AC voltages of secondary-winding terminals 2, 10 and 6 leads the input three-phase AC voltage by 30 deg., and the magnitude becomes 3<1/2> times. Furthermore, the 12-phase AC is outputted through the secondary-winding terminals 1-12 by connecting neutral lines o2 of the SG Y and neutral lines o3 of the DG D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 12-phase AC power supply device capable of outputting 12-phase AC power from a 3-phase AC power supply with a simple structure, and a high density using the 12-phase AC power supply device. The present invention relates to a 12-electrode discharge device capable of generating various discharges.

[0002]

2. Description of the Related Art As is well known, there are various forms of gas discharge phenomenon, such as corona discharge, glow discharge, arc discharge, etc., depending on the pressure and the magnitude of current.
It is widely used in various devices as a supply source of high temperature, high brightness light, or a unipolar charged body. And, in order to efficiently use the high energy associated with discharge in various fields, many improvements have been actively made. However, all of the conventional discharge devices use single-phase alternating current or direct current as their power source, and the discharge phenomenon itself is a linear discharge, so there is a limit to the improvement of these energy utilization efficiency.

The applicant of the present invention has conducted various researches to generate discharge itself with high efficiency, and has already completed a 6-phase AC 6-electrode arc discharge device (Japanese Patent Application No. 4-228984). This device has a 6-phase AC power supply and a hexagonal vertex 6
This electrode is constructed by devising the connection order of the book electrodes, and by applying a voltage according to the distance between the electrodes to each electrode, high speed without interruption of multiple arc discharges between the 6 electrodes. It was possible to generate it flatly while rotating. Further, as a result of experimental research, the applicant of the present invention has found that the above-mentioned planar discharge that generates surprisingly high energy is not limited to the 6-phase AC-6 main electrode device, and the n-phase AC-n
It has been found that this electrode device can also be generated (Japanese Patent Application No. 5-90286, Japanese Patent Application No. 5-101526, etc.).

Therefore, the applicant of the present application has proposed that this n-phase alternating current-n
In order to use this electrode discharge device, we first aimed at the completion of a 12-phase AC power supply device that can transform a commonly used 3-phase AC into a 12-phase AC without complicating the structure. Conventionally, in the field of rectifiers, for example, four sets of three
Several so-called quadruple star zigzag connections in which phase connections are connected by three interphase reactors to perform 12-phase rectification, and connections in which three sets of four-phase connections are combined in interphase reactors have been proposed. However, in all of these connection methods, the transformer secondary winding is complicated and mechanically weakened, and the interphase reactor is essential, so that the structure is inevitably complicated.
As mentioned earlier, it consists of only a few discharge electrodes
In order to maximize the characteristics of the discharge device that can be reduced in weight, the power supply device must be as compact as possible and have a simple internal structure.

[0005]

The present invention skillfully utilizes the fact that the angular displacement between the star-star connection and the star-delta connection is 30 °, so that no other equipment such as an interphase reactor is used. It is a technical object to provide a 12-phase AC power supply device that can easily perform phase conversion from 3-phase AC to 12-phase AC and output the power by using only two or three types of transformers.

Another technical subject of the present invention is to use a magnetic leakage transformer to easily output 12-phase AC power suitable for various discharge lamps from 3-phase AC. To provide.

Further, another technical problem of the present invention is
An object of the present invention is to provide a lightweight, compact and efficient 12-phase AC power supply device by making it possible to easily perform phase conversion from 3-phase AC to 12-phase AC by using only two 3-phase transformers.

Furthermore, another technical problem of the present invention is as follows.
An object of the present invention is to provide a 12-phase AC power supply device which not only enhances the economical efficiency but also reduces the failure rate by simplifying the wiring structure as much as possible.

Furthermore, another technical problem of the present invention is as follows.
It is an object of the present invention to provide a 12-electrode high-density discharge device which can generate various discharges with extremely high density by using the 12-phase AC power supply device.

[0010]

According to the present invention, the secondary winding side is star-connected, and the winding ratio between the secondary windings of each phase is 1 / √3 from the neutral point. A three-phase transformer provided with an intermediate terminal; three pairs of transformers are connected in parallel for each three-phase alternating current phase to form a pair, and one pair of transformers connected in parallel as these pairs And a star connection group Y formed by connecting the winding end of the transformer secondary winding and the winding start of the other transformer secondary winding, and further connecting these connection portions with a neutral wire. Phase alternating current For each phase, two sets of three transformers are connected in parallel to form a pair, and one end of the transformer secondary winding of the pair of transformers connected in parallel as these pairs and the other end. Delta formed by connecting the winding start of the transformer secondary winding of and the connection parts with a neutral wire. A three-phase transformer and a star connection group Y in a three-phase four-wire system by using a secondary winding terminal and a neutral point in the three-phase transformer. And connecting the three-phase transformer and the delta connection group D by star-delta connection using the intermediate terminal of the three-phase transformer, and further neutralizing the star connection group Y and the delta connection group D. The above problems have been solved by adopting the technical means of connecting wires.

Further, according to the present invention, the 12-phase AC power supply device obtained by adopting the above technical means and the discharge electrodes arranged at the respective vertex positions of the regular dodecagon are output from the 12-phase AC power supply device. A technical means was adopted in which 12-phase alternating current was connected in such a manner that a 12-phase alternating current was applied to the discharge electrodes in the order of their phases in the clockwise or counterclockwise order.

[0012]

EXAMPLES The present invention will be described below based on examples.
1 is a schematic connection diagram of the power supply device according to the first embodiment of the present invention, FIG. 2 is a vector diagram of alternating current output from a star connection group Y of the power supply device, and FIG. 3 is a delta connection group of the power supply device. Vector diagram of alternating current output from D, FIG.
Is a vector diagram of 12-phase alternating current output from the same power supply device, FIG. 5 is a schematic connection diagram of a second embodiment power supply device according to the present invention, FIG. 6 is a schematic connection diagram of a third embodiment power supply device according to the present invention, Figure 7
A schematic connection diagram of a 12-electrode high-density discharge device using a 12-phase AC power supply device, FIG. 8 is a voltage vector diagram of an alternating current applied between electrodes of the 12-electrode high-density discharge device, and FIG. 9 is each electrode of the device. FIG. 10 and FIG. 11 are composite vector diagrams of the alternating current applied between them, and are explanatory diagrams of the discharge path of the high-density discharge generated by the device.

First, the 12-phase AC power supply device of the first to third embodiments will be described below with reference to FIGS. 1 to 6, and then the 12-phase AC power supply will be described with reference to FIGS. 7 to 11. Using the device
A 12-electrode discharge device will be described.

[First Embodiment Power Supply Device] As shown in FIG. 1, the power supply device of this embodiment is mainly composed of three constituent parts, namely, a star connection power supply part P, a star connection group Y, and a delta connection group D. , Star connection power supply P
Star connection group Y and Delta connection group D
Each of them is connected in parallel by a predetermined wiring method. Hereinafter, each component and its connecting method will be described.

The star connection power supply section P is composed of a three-phase transformer indicated by reference numeral S ₀ in the figure. This three-phase transformer S ₀
Is an external three-phase AC power source U-V, V-W on the primary winding side,
And W-U are delta-connected (or star-connected), and the secondary winding side is star-connected at the neutral point o ₁ . Furthermore, each phase secondary winding u ₁ -o _{1 of} the three-phase transformer S ₀ ,
Intermediate terminals u ₂ , v are provided at predetermined positions between v ₁ -o ₁ and w ₁ -o _1.
2 and w ₂ are provided. The position where the intermediate terminal u ₂ is drawn is the number of turns between the neutral point o ₁ and the terminal u ₁ between the secondary windings u _{1 and} o ₁ : The number of turns between the neutral point o ₁ and the intermediate terminal u ₂ = √3 The intermediate terminals v ₂ and w ₂ are also similarly drawn between the secondary windings v ₁ -o _{1 and} between the secondary windings w ₁ -o ₁ .

Neutral point o ₁ -terminals u ₁ , v ₁ , w ₁
The 3-phase AC voltage outputted from between, Eu _1, Ev _1, E
The three-phase AC voltage output from neutral point o ₁ -intermediate terminals u ₂ , v ₂ , and w ₂ is represented by w ₁ , and Eu ₂ , Ev ₂ , and Ew
_If represented by ₂ , the three-phase AC voltage Eu is obtained by the above configuration.
₁ , Ev ₁ , Ew ₁ and three-phase AC voltage Eu ₂ , Ev ₂ , E
The relationship with w ₂ is the same phase, and its magnitude is √3: 1.
Becomes

The star connection group Y includes three sets of six single-phase magnetic leakage transformers S ₁ , S ₇ , S ₉ , S _{3 in which} two units are connected in parallel for each phase of the input three-phase AC. , S ₅ / S ₁₁
Composed of and. And a single-phase transformer S with two units as a pair
So-called diametrical connections (6 relative angle connections) are made on the secondary winding sides of ₁ · S ₇ , S ₉ · S ₃ , and S ₅ · S ₁₁ . That is, the winding end of the secondary winding of one of the transformers S ₁ , S _9, and S ₅ of the two single-phase transformers connected in parallel for each three-phase alternating current phase and the other transformer S ₇ · S ₃ · S to connect the o by winding start of the secondary winding ₁₁ is to connect these connection portions still neutral o _2. With this configuration, single-phase transformer _{S 1 · S 7, S 9} · S 3, S 5 · commonly connected to not the secondary winding terminals (1) of S _11-(7), pin (9)
Six-phase alternating current is output from (3) and terminals (5) and (11).

Similarly to the star connection group Y, the delta connection group D also has three sets of six single-phase magnetic leakage transformers S connected in parallel for each input three-phase alternating current phase. It is composed of ₂・ S ₈ , S ₁₀・ S ₄ , and S ₆・ S _12, and a pair of two single-phase transformers S ₂・ S ₈ , S ₁₀
· S _4, S the secondary winding side diamonds metrical connection (6 relative angular connection) of ₆ · S ₁₂ and are. That is, for each of the three-phase alternating current phases, the winding end of one transformer secondary winding and the winding start of the other transformer secondary winding of two single-phase transformers connected in parallel as a pair are connected. , The neutral part o
Connect at ₃ . This configuration, single-phase transformer _{S 2 · S 8, S 10} · S 4, S 6 · commonly connected to not the secondary winding terminals (2) of S _12-(8), the terminal (10)
Six-phase alternating current is output from (4) and terminals (6) and (12).

The star connection power supply unit P, the star connection group Y, and the delta connection group D in this embodiment are
It is configured as described above, and these are connected by the connection method described below.

First, the star connection power source P and the star connection group Y are connected in a three-phase four-wire system. That is, the neutral point o
Star connection power supply unit P that is formed by pulling out ₁ and star connection
Terminals u ₁ , v ₁ , w ₁ and the neutral point o ₁ and the single-phase transformers S ₁ , S ₇ , S ₉ , S ₃ , S _{5 of the} star connection group Y.
・ Star connection with the primary terminal of S ₁₁ . By connecting the three-phase four-wire system in this way, as shown in FIG. 2, the AC voltage output from the secondary winding terminals (1), (9), and (5) is input to the three-phase four-wire system. Phase AC voltage E
u ₁ , Ev ₁ , and Ew ₁ have the same phase and the same size. The secondary winding terminals (7), (3),
The alternating voltage output from (11) is, as described above, due to the diametrical connection, the secondary winding terminal (1),
The AC voltages output from (9) and (5) have opposite phases, and their magnitudes are equal.

The star connection power supply unit P is also connected to the delta connection group D. However, as shown in FIG. 1, the star connection power supply unit P and the delta connection group D are connected by delta connection. That is, the intermediate terminals u ₂ , v ₂ , w _{2 of} the star connection power source P and the primary side terminals of the single-phase transformers S ₂ , S ₈ , S ₁₀ , S ₄ , S ₆ , S ₁₂ of the delta connection group D. Delta connection. In this way both
As shown in FIG. 3 by delta connection, wherein the secondary winding terminals (2), (10), an AC voltage output from (6), the inputted 3-phase AC voltages Eu _2, Ev ₂ , E
The phase advances 30 ° from w ₂ and its magnitude becomes √3 times.

This is because, for example, the AC voltage output from the secondary winding terminal (2) is the input three-phase AC voltage E.
This is because there is a vector difference between u ₂ and the voltage Ev ₂ . The same applies to the AC voltage output from the other secondary winding terminals (10) and (6). The secondary winding terminals (8), (4),
The AC voltage output from (12) is connected to the secondary winding terminals (2), (1
0) and (6), the phases of the AC voltage are opposite to each other, and their magnitudes are equal.

As described above, the AC voltage output from the delta connection group D is the three-phase AC voltage Eu ₂ , Ev ₂ , E.
Since it becomes √3 times w ₂ , in this embodiment, intermediate terminals u ₂ , v ₂ and w ₂ are provided in the star connection power supply unit P, and the 1 / √3 times three-phase alternating current output from this is delta. It is input to the connection group D. The apparatus according to the present embodiment further connects the neutral wire o ₂ in the star connection group Y and the neutral wire o ₃ in the delta connection group D, so that the secondary winding terminal (1) is connected as shown in FIG. 12-phase alternating current is output from (12).

[Second Embodiment Power Supply Device] The second embodiment power supply device shown in FIG. 5 is a 12-phase AC power supply device that can be applied when it is not necessary to use a magnetic leakage transformer, for example.
Star connection group Y and Delta connection group D
It consists of a three-phase transformer instead of a single-phase transformer. That is, the star connection group Y is composed of the three-phase transformer S ₁₃ and the delta connection group D is composed of the three-phase transformer S ₁₄ . Each of the three-phase transformers S ₁₃ and S ₁₄ is provided with an intermediate terminal at the midpoint of each phase secondary winding, and these intermediate terminals are all neutral wires o ₄ and o
They are connected at _5, respectively.

The neutral line o ₄ and the neutral line o ₅ are connected, the configuration of the star power supply unit P, the star power supply unit P and the star connection group Y, and the star power supply unit P and the delta connection group D are connected. The wiring method is similar to that of the first embodiment device, and the secondary winding terminals (1) to (3) of the three-phase transformers S ₁₃ and S ₁₄ are connected.
12-phase AC is output from (12).

[Third Embodiment Power Supply Device] In the third embodiment power supply device shown in FIG. 6, the star connection group Y and the delta connection group D are not the single-phase transformer but the three-phase transformers as in the second embodiment. It is configured using a transformer. However, the adjustment of the AC voltage value is performed not in the star connection power supply unit P but in the star connection group Y and the delta connection group D. That is, the star connection power supply unit P
Is not provided with the intermediate terminals u ₂ , v ₂ and w ₂ in the first embodiment. Instead, the number of turns of each phase secondary winding of the three-phase transformer S ₁₅ forming the star connection group Y is That is, the number of turns of each phase secondary winding of the three-phase transformer S ₁₆ constituting the delta connection group D is √3 times.

[0027] With this configuration, the secondary winding terminals of the three-phase transformer S ₁₅ (1), (3) ... six-phase AC voltage output from (11) the size, the three-phase transformer S ₁₆ The magnitude of the 6-phase AC voltage output from the secondary winding terminals (2), (4), ... (12) is multiplied by √3, and the neutral line o ₇ of the 3-phase transformer S ₁₅ and the 3-phase transformer are converted. by connecting the neutral o ₈ vessel S _16, 3-phase transformer S _15, the secondary winding terminals of S ₁₆ (1) ~ (1
It is designed to output 12-phase AC from 2).

The 12-phase AC power supply device according to the present invention has been described above with reference to the first to third embodiments. These power supply devices according to the present invention are used depending on the purpose of use, installation floor area, capacity, etc. Can be used properly.

Next, using this 12-phase AC power supply device, 12
The electrode high-density discharge device will be described with reference to FIGS.

In FIG. 7, reference numerals T _{1 to} T ₁₂ indicate rod-shaped discharge electrodes, and the discharge electrodes T _{1 to} T ₁₂ are
As its tip is located near the virtual regular dodecagonal vertex,
It is supported by an insulating electrode holder H. A 12-electrode high-density discharge device is constructed by connecting the discharge electrodes T _{1 to} T ₁₂ and the aforementioned 12-phase AC power supply device in a predetermined connection order. That is, the 12-phase AC output from the secondary winding terminals (1) to (12) of the 12-phase AC power supply device is
The discharge electrodes T _{1 to} T ₁₂ are connected so as to be applied in a clockwise order (or a counterclockwise order may be applied). By this connection method, in the region surrounded by the discharge electrodes T _{1 to} T ₁₂ ,
A total of 66 discharges are generated without interruption, with the discharge directions being aligned and rotating in high speed according to the discharge sequence, in a planar or three-dimensional manner. The state of this discharge will be described below.

The voltage applied from the terminals (1) to (12) of the 12-phase AC power supply device to the respective discharge electrodes T _{1 to} T ₁₂ is electrode T ₁ ; sin θ, electrode T ₂ ; sin (θ + 2π /
12), electrode T ₃ ; sin (θ + 4π / 12), electrode T ₄ ; sin
(Θ + 6π / 12), electrode T ₅ ; sin (θ + 8π / 12), electrode T ₆ ; sin (θ + 10π / 12), electrode T ₇ ; sin (θ + 12π)
/ 12), electrode T ₈ ; sin (θ + 14π / 12), electrode T ₉ ; sin
(Θ + 16π / 12), electrode T ₁₀ ; sin (θ + 18π / 12), electrode T ₁₁ ; sin (θ + 20π / 12), electrode T ₁₂ ; sin (θ + 22π)
/ 12), can be expressed as. Therefore, the voltage between the electrodes T _{1 and} T ₂ ; sin θ−sin (θ + 2π / 12) = − (√3-1) / √2co
s (θ + π / 12), and similarly, voltage between electrodes T _{1 and} T ₃ ; −cos (θ + 2π / 12), voltage between electrodes T _{1 and} T ₄ ; −√
2cos (θ + 3π / 12), voltage between electrodes T ₁ -T ₅ ; −√3cos
(Θ + 4π / 12), voltage between electrodes T ₁ -T ₆ ;-(√3 + 1) /
√2cos (θ + 5π / 12) voltage between electrodes T ₁ -T ₇ ; -2cos (θ + 6π / 12) voltage between electrodes T ₁ -T ₈ ;-(√3 + 1) / √2cos (θ + 7π /
12) Electrode T ₁ -T ₉ voltage; −√3cos (θ + 8π / 12), electrode T ₁ −T ₁₀ voltage; −√2cos (θ + 9π / 12), electrode T ₁ −
The voltage between T _{11 is} −cos (θ + 10π / 12), and the voltage between the electrodes T _{1 and} T _{12 is −} (√3-1) / √2cos (θ + 11π / 12).

Here, it should be noted that the maximum value of the AC voltage applied between the electrodes corresponds to the distance between the electrodes. That is, the discharge electrodes T _{1 to} T ₁₂ are positive
Since the electrodes are arranged at the apexes of the dodecagon, the electrodes T ₁ -T
_{If the} distance between ₃ is L, the distance between the electrodes T _{1 and} T ₂ ; (√3
-1) / √2L, distance between electrodes T _{1 and} T ₄ ; √2L, electrode T ₁
-T ₅ between distance; √3L, the distance between the electrodes T ₁ -T _6; (√3 +
1) / √2L, distance between electrodes T ₁ -T ₇ ; 2L, electrodes T ₁ -T
Distance between ₈ ; (√3 + 1) / √2L, distance between electrodes T ₁ -T ₉ ;
√3L, distance between electrodes T ₁ -T ₁₀ ; √2L, electrodes T ₁ -T ₁₁
Distance; L, distance between electrodes T _{1 and} T ₁₂ ; (√3-1) / √2L
Becomes

For example, a distance of (√3-1) / √2L between electrodes T _{1 and} T ₂ is applied with an alternating current of − (√3-1) / √2cos (θ + π / 12), and the distance; An alternating current of −√2cos (θ + 3π / 12) is applied between the √2L electrodes T _{1 and} T ₄ .

As can be seen from the relationship between the inter-electrode distance and the inter-electrode voltage, in the 12-electrode discharge device according to the present invention, the maximum applied voltage per unit distance between the electrodes is Therefore, not only discharge between adjacent electrodes having the same distance and short distance, but also discharge between other electrodes is performed.

Next, from the discharge electrode T ₁ to the other electrodes T _{2 to} T ₁₂
The change with time of the discharge to is explained. FIG. 8 is a vector diagram of the applied voltage to the other electrodes T _{2 to} T ₁₂ of the discharge electrode T _{1 at} a certain moment. Other electrodes T _{2 to} T _{12 of} discharge electrode T ₁
Each discharge against changes momentarily,
These discharge changes are performed uniformly. That is, as shown in FIG. 9, each discharge is continuous so that the combined vector F obtained by combining all the discharge vectors for the other electrodes T _{2 to} T ₁₂ of the electrode T ₁ rotates in an elliptical locus. It will change to.

Then, as shown in FIG. 9, the discharge electrode T
_At the moment when the combined vector F of ₁ is directed to the midpoint between the electrodes T ₈ and T ₉ , the discharge reaches the electrodes T ₈ and T ₉ mainly from the discharge electrode T ₁ while being divided and bent. . That is, in the discharge device of this embodiment, not only the discharge on the straight line connecting the electrode T ₁ and the other electrodes T ₂ · T ₃ ... T ₁₂ but also the discharge to other spaces. Such a composite vector F also exists in the other electrodes T _{2 to} T ₁₂ as well. By linking a plurality of these rotationally combined vectors, uniform and stable planar or three-dimensional discharge in vacuum occurs between the discharge electrodes T _{1 to} T ₁₂ as a whole. The state of the planar discharge between the discharge electrodes T ₁ through T ₁₂ shown in FIG. 10.

FIG. 10 shows the discharge path at each instant when the phase advances by 15 °. The arrow in the figure indicates that the maximum voltage value is applied between the electrodes and the discharge current flows in the direction of the arrow. As is clear from FIG. 10, in the discharge device of this embodiment, a plurality of discharges are always generated at the same time, and the plurality of discharges are aligned and rotate. Discharge is 1 per AC cycle
Since it rotates, when a power source with a frequency of 50 or 60 Hz is used, the planar discharge formed by a plurality of aligned discharges rotates at a high speed of 50 or 60 times per second.

Further, although FIG. 10 shows only the discharge to which the maximum voltage value is applied, in reality, as shown in FIG. 11, a large number of discharges are generated between the other electrodes. The discharge path shown in FIG. 11 is at the instant of phase 0 ° in FIG. When the maximum voltage value is applied between the electrodes and the discharge indicated by the thick arrow occurs, a voltage, which is not the maximum value, is applied between the other electrodes as shown by the thin line, so that the discharge is performed. At the moment of FIG. 11, the electrodes T ₂ -T ₁₂ , the electrodes T ₃ -T ₁₁ , the electrodes T ₄ -T ₁₀ , the electrodes T ₅ -T _9, and the electrodes T ₆ -T ₈ are equipotential. Excluding 61 discharges, a total of 61 discharges occur in a region surrounded by the electrodes T ₁ to T ₁₂ substantially rightward in the drawing and at a very high density.

In FIG. 11, the discharge path is represented by a straight line in order to simplify the state of discharge, and the entire discharge path has a mesh shape, but the actual discharge is divided as described above. The discharge electrode T ₁
Between T _{12 and} T ₁₂ is made flat.

As described above, the characteristic of the high-density discharge generated by the 12-electrode high-density discharge device according to the present invention is that the tips of the electrodes T _{1 to} T ₁₂ are arranged close to the regular dodecagonal apex position to form a substantially dodecagonal pyramid shape. Although the formed electrode unit is used and explained as the planar discharge generated at the electrode tip, this high-density discharge is not limited to the planar discharge, and for example, the electrode unit is included in the discharge chamber. Then, if the discharge is started in a vacuum, the high-density discharge is three-dimensionally (substantially regular 12-sided pyramid trapezoidal shape) in the area surrounded by the electrodes T _{1 to} T ₁₂ while rotating at high speed as described above. It will happen. Further, when the discharge is performed under vacuum in this way, the electrodes T _{1 to} T _{12 are}
Even if the electrodes are arranged in parallel and the electrode unit is formed in a substantially dodecagonal prism shape, high-density discharge occurs in the substantially dodecagonal prism shape.

[0041]

As described above with reference to the embodiments, in the 12-phase AC power supply device according to the present invention, the angular displacement between the star-star connection and the star-delta connection is 30 °.
By skillfully utilizing that, the three-phase alternating current can be directly applied with a simple structure without complicating the structure.
Since it can be transformed into a phase alternating current, the device can be provided at low cost, and its industrial utility value is extremely high.

Further, in the 12-electrode high-density discharge device according to the present invention, various discharges such as corona discharge, glow discharge, arc discharge, etc. occur in the area surrounded by the multiple electrodes while continuously rotating at high speed. Therefore, it is possible to efficiently generate high energy such as high heat and high brightness light associated with various discharge phenomena, and since these discharges are formed into a flat shape or a three-dimensional shape, it is possible to use high energy accompanying discharge. It will be easy.

[Brief description of drawings]

FIG. 1 is a schematic connection diagram of a first embodiment power supply device according to the present invention.

FIG. 2 is a vector diagram of alternating current output from a star connection group Y of the power supply device.

FIG. 3 is a vector diagram of an alternating current output from a delta connection group D of the power supply device.

FIG. 4 is a vector diagram of 12-phase AC output from the power supply device.

FIG. 5 is a schematic connection diagram of a second embodiment power supply device according to the present invention.

FIG. 6 is a schematic connection diagram of a third embodiment power supply device according to the present invention.

FIG. 7 is a schematic connection diagram of a 12-electrode high-density discharge device using a 12-phase AC power supply device.

FIG. 8 is a voltage vector diagram of an alternating current applied between electrodes of a 12-electrode high-density discharge device.

FIG. 9 is a composite vector diagram of alternating current applied between electrodes of the apparatus.

FIG. 10 is an explanatory diagram of a discharge path of high-density discharge generated by the device.

FIG. 11 is an explanatory view of a discharge path of a high-density discharge generated by the device.

[Explanation of symbols]

o ₁ Neutral point u ₁ , v ₁ , w ₁ Secondary winding terminal u ₂ , v ₂ , w ₂ Intermediate terminal o _{2 to} o ₈ Neutral wire S _{1 to} S ₁₂ Single-phase transformer S ₀ , S ₁₃ ~ S ₁₆ Three-phase transformer T ₁ ~ T ₁₂ Discharge electrode

Claims (6)

[Claims] 1. The secondary winding side is star-connected with the neutral point o ₁ and each phase secondary winding u ₁ -o ₁ , v ₁ -o ₁ , w ₁ -o ₁
Between the points where the turns ratio from the neutral point o ₁ is 1 / √3,
A three-phase transformer S ₀ provided with intermediate terminals u ₂ , v ₂ and w ₂ ;
Three sets of three-phase alternating current, three sets of transformers S ₁ and S in parallel for each phase
₇ , the transformers S ₉ and S ₃ and the transformers S ₅ and S ₁₁ are connected to form a pair, and one of the transformer secondary windings of one pair of transformers connected in parallel as these pairs is connected to the end of winding. A star connection group Y formed by connecting the winding start of the other transformer secondary winding and connecting these connection parts with each other with a neutral wire o ₂ ; 2 in parallel for each three-phase AC phase Three sets of transformers S ₂ · S ₈ , transformers S ₁₀ · S _4, and transformer S ₆ ·
S ₁₂ are connected to form a pair, and the winding end of one transformer secondary winding and the winding start of the other transformer secondary winding of each pair of transformers connected in parallel are connected. , A delta connection group D formed by further connecting these connection parts with a neutral line o ₃ , wherein the three-phase transformer S ₀ and the star connection group Y are connected to each other.
Connect to the phase transformer S ₀ in the secondary winding terminals u _1, v _1, w ₁ and 3-phase 4-wire with a neutral point o _1, the three-phase transformer S ₀ and a delta connection Group D Is star-delta connected using the intermediate terminals u ₂ , v ₂ and w ₂ in the three-phase transformer S ₀ , and the neutral wire o ₂ and the neutral wire o ₃ are connected. 12 phase AC power supply. 2. A star connection group Y is provided with an intermediate terminal at the midpoint of each phase secondary winding, and all the intermediate terminals are neutral wires o _4.
In forming a three-phase transformer S ₁₃ that were connected, the delta connection group D, and the intermediate terminal is provided at the midpoint of each phase secondary windings, and connected the intermediate terminal with all neutral o ₅ 3
The 12-phase AC power supply device according to claim 1, wherein the 12-phase AC power supply device is formed by a phase transformer S ₁₄ , and the neutral line o ₄ and the neutral line o ₅ are connected. 3. A neutral wire o ₆ is drawn out and star-connected 3
Phase AC power supply; Intermediate terminal is provided at the midpoint of each phase secondary winding,
A three-phase transformer S in which all the intermediate terminals are connected by a neutral wire o _7.
15 and; an intermediate terminal is provided at the middle point of each phase secondary winding, all the intermediate terminals are connected by a neutral wire o ₈ , and the number of turns of each phase secondary winding is the three-phase transformer S 1 of the number of turns of ₁₅ secondary windings for each phase
A power supply device including a three-phase transformer S ₁₆ that is / √3, the three-phase AC power source and the three-phase transformer S ₁₅ being connected in a three-phase four-wire system. A 12-phase AC power supply device characterized in that a star-delta connection is made with a three-phase transformer S _16, and the neutral wire o ₇ and the neutral wire o ₈ are further connected. 4. The secondary winding side is star-connected with the neutral point o ₁ and each phase secondary winding u ₁ -o ₁ , v ₁ -o ₁ , w ₁ -o ₁
Between the points where the turns ratio from the neutral point o ₁ is 1 / √3,
A three-phase transformer S ₀ provided with intermediate terminals u ₂ , v ₂ and w ₂ ;
Three sets of three-phase alternating current, three sets of transformers S ₁ and S in parallel for each phase
₇ , the transformers S ₉ and S ₃ and the transformers S ₅ and S ₁₁ are connected to form a pair, and one of the transformer secondary windings of one pair of transformers connected in parallel as these pairs is connected to the end of winding. A star connection group Y formed by connecting the winding start of the other transformer secondary winding and connecting these connection parts with each other with a neutral wire o ₂ ; 2 in parallel for each three-phase AC phase Three sets of transformers S ₂ · S ₈ , transformers S ₁₀ · S _4, and transformer S ₆ ·
S ₁₂ are connected to form a pair, and the winding end of one transformer secondary winding and the winding start of the other transformer secondary winding of each pair of transformers connected in parallel are connected. , A delta connection group D formed by further connecting these connection parts with a neutral wire o ₃ , and 12 discharge electrodes T _{1 to} T ₁₂ arranged near each vertex of a regular dodecagon. A discharge device, wherein the three-phase transformer S ₀ and the star connection group Y are
Connect to the phase transformer S ₀ in the secondary winding terminals u _1, v _1, w ₁ and 3-phase 4-wire with a neutral point o _1, the three-phase transformer S ₀ and a delta connection Group D and using the intermediate terminal u _2, v _2, w ₂ Star in the 3-phase transformer S ₀ - by delta connection, further wires the said neutral line o ₂ and neutral o _3, Stars A 12-electrode high-density discharge device characterized in that 12-phase alternating current output from the connection group Y and the delta connection group D is applied to the discharge electrodes T _{1 to} T _{12 in the} order of their phases in the right or left-handed order. 5. A star connection group Y is provided with an intermediate terminal at the midpoint of each phase secondary winding, and all the intermediate terminals are neutral wires o _4.
In forming a three-phase transformer S ₁₃ that were connected, the delta connection group D, and the intermediate terminal is provided at the midpoint of each phase secondary windings, and connected the intermediate terminal with all neutral o ₅ 3
_5. The 12-electrode high-density discharge device according to claim 4, wherein the 12-electrode high-density discharge device is formed by a phase transformer S ₁₄ , and the neutral line o ₄ and the neutral line o ₅ are connected. 6. A neutral wire o ₆ is drawn out and star-connected 3
Phase AC power supply; Intermediate terminal is provided at the midpoint of each phase secondary winding,
A three-phase transformer S in which all the intermediate terminals are connected by a neutral wire o _7.
15 and; an intermediate terminal is provided at the middle point of each phase secondary winding, all the intermediate terminals are connected by a neutral wire o ₈ , and the number of turns of each phase secondary winding is the three-phase transformer S 1 of the number of turns of ₁₅ secondary windings for each phase
A discharge device including a three-phase transformer S _{16 of} / √3; and twelve discharge electrodes T _{1 to} T ₁₂ arranged near each vertex of a regular dodecagon; The three-phase transformer S ₁₅ is connected in a three-phase four-wire system, the three-phase AC power source and the three-phase transformer S ₁₆ are star-delta connected, and the neutral line o ₇ and the neutral line o _{8 are} further connected. By connecting and, the three-phase transformer S ₁₅ and the three-phase transformer S ₁₅
A 12-electrode high-density discharge device characterized in that 12-phase alternating current output from ₁₆ is applied to the discharge electrodes T _{1 to} T _{12 in the} order of their phases, in the order of right or left.