JP2618813B2 - 12-phase AC power supply device and 12-electrode high-density discharge device using the same - Google Patents

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 types of gas discharge phenomena such as corona discharge, glow discharge and arc discharge 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. In each field, many improvements have been made positively in order to efficiently use high energy accompanying discharge. 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.

[0003] The present applicant has conducted various studies to generate a discharge itself with high efficiency, and has already completed a six-phase AC six-electrode arc discharge device (Japanese Patent Application No. 4-228984). This device has a 6-phase AC power supply and a hexagonal vertex 6
It is constructed by devising the connection order of the electrodes and applying a voltage corresponding to the distance between the electrodes to each electrode, so that a plurality of arc discharges can be performed without interruption between the six electrodes. It has been possible to generate it in a plane while rotating it. 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 can also occur in the present electrode device (Japanese Patent Application No. 5-90286, Japanese Patent Application No. 5-101526).

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 3
Several so-called quadruple-star staggered connections in which phase connections are connected by three interphase reactors to perform 12-phase rectification, and combinations of three sets of four-phase connections 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 makes use of the fact that the angular displacement between the star-star connection and the star-delta connection is 30 ° without using any other equipment such as an interphase reactor. It is a technical object of the present invention to provide a 12-phase AC power supply device that can easily perform phase transformation from three-phase AC to 12-phase AC with only two or three types of transformers and output.

Another technical object of the present invention is to provide a 12-phase AC power supply device capable of easily outputting a 12-phase AC suitable for various discharge lamps from a 3-phase AC by using a magnetic leakage transformer. To provide.

Further, another technical problem of the present invention is
An object of the present invention is to provide a light-weight, compact and efficient 12-phase AC power supply by enabling a simple transformation of a 3-phase AC to a 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.
An object of the present invention is to provide a 12-electrode high-density discharge device capable of generating various discharges at 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 to the winding start of the other transformer secondary winding, and further connecting these connection parts 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 secondary winding of the transformer with the start of the winding of the transformer A power supply device including a wire group D and a star connection group Y in a three-phase four-wire system using a secondary winding terminal and a neutral point of the three-phase transformer. The three-phase transformer and the delta connection group D are connected in a star-delta connection using an intermediate terminal of the three-phase transformer, and the neutral connection of the star connection group Y and the neutral connection of the delta connection group D are further performed. The above problems have been solved by adopting the technical means of connecting wires.

Further, according to the present invention, a 12-phase AC power supply obtained by employing the above-mentioned technical means and a discharge electrode arranged at each vertex position of a regular dodecagon are output from the same 12-phase AC power supply. 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]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
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 a 12-phase alternating current output by the power supply device, FIG. 5 is a schematic connection diagram of the power supply device of the second embodiment according to the present invention, FIG. 6 is a schematic connection diagram of a power supply device of the third embodiment 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, a 12-phase AC power supply according to first to third embodiments will be described with reference to FIGS. 1 to 6, and then a 12-phase AC power supply will be described with reference to FIGS. 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 comprises three main components: a star connection power supply section P, a star connection group Y, and a delta connection group D. , Star connection power supply P
The star connection group Y and the delta connection group D
Each of them is connected in parallel by a predetermined wiring method. Hereinafter, each component and its connection 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 ,
At predetermined positions between v ₁ -o ₁ and w ₁ -o _1, intermediate terminals u ₂ , v
₂ and w ₂ are provided. Pulled-out position of the intermediate terminal u _2, in between the secondary winding u ₁ -o _1, the neutral point o ₁ - turns between the terminals u _1: neutral o ₁ - turns between the intermediate terminals 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 .

Here, neutral point o ₁ -terminals u ₁ , v ₁ , w ₁
The 3-phase AC voltage outputted from between, Eu _1, Ev _1, E
expressed in w _1, the neutral point o ₁ - a 3-phase AC voltage outputted from between the intermediate terminal _{u 2, v 2, w 2} , Eu 2, Ev 2, Ew
_If represented by ₂ , the three-phase AC voltage Eu is obtained by the above configuration.
₁ , Ev ₁ , Ew ₁ and the three-phase AC voltages 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 connected in parallel for each of the three phases of the input three-phase alternating current. , S ₅ / S ₁₁
Composed of and. And a single-phase transformer S with two units as a pair
_The secondary winding sides of ₁ · S ₇ , S ₉ · S ₃ , and S ₅ · S ₁₁ are so-called diamond connections (six relative angle connections). 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 The S ₃ and S ₁₁ are connected to the winding start of the secondary winding, and these connection portions are further connected to each other by the neutral wire 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 includes three sets of six single-phase magnetic leakage transformers S connected in parallel, two for each phase of the input three-phase AC. ₂ · S ₈ , S ₁₀ · S ₄ , S ₆ · S _12, and two single-phase transformers S ₂ · S ₈ , S ₁₀
• The secondary winding side of S ₄ , S ₆ , S ₁₂ is connected with diamond connection (6 relative angle connection). That is, for each three-phase alternating current phase, 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. , These connection parts are further neutralized o
Connect at ₃ . With this configuration, the secondary winding terminals (2) and (8), the terminal (10) and the unconnected single-phase transformers S ₂ and S ₈ , S ₁₀ and S ₄ , and S ₆ and S ₁₂ are not commonly connected.
A 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
These are 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 section P, which is made 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),
As described above, the AC voltage output from (11) is connected to the secondary winding terminals (1),
The AC voltages output from (9) and (5) have phases opposite to each other, and have the same magnitude.

The star connection power supply section P is also connected to the delta connection group D. However, as shown in FIG. 1, the connection between the star connection power supply unit P and the delta connection group D is performed 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
By the delta connection, as shown in FIG. 3, the AC voltage output from the secondary winding terminals (2), (10), and (6) is converted into the input three-phase AC voltage Eu ₂ , Ev _2. , E
The phase advances by 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
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 the AC voltage output from (6) have opposite phases, and their magnitudes are equal.

As described above, the AC voltages output from the delta connection group D are three-phase AC voltages 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 the star connection group Y at 3-phase transformers S _13, it is to constitute a delta connection group D in 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. 's wiring method is similar to the first embodiment device, the three-phase transformer S _13, S ₁₄ of the secondary winding terminals (1) -
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 section P
Does not have the intermediate terminals u ₂ , v ₂ , w ₂ in the first embodiment, and instead, the number of turns of each phase secondary winding of the three-phase transformer S ₁₅ constituting the star connection group Y is as follows: with each other to a √3 times the number of turns of each phase secondary windings of the three-phase transformer S ₁₆ constituting the delta connection group D.

[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 secondary winding terminals (2), (4) ... (12) in the √3 times the size of six-phase AC voltage outputted from the three-phase transformer and neutral line o ₇ of the three-phase transformer S ₁₅ by connecting the neutral o ₈ vessel S _16, 3-phase transformer S _15, the secondary winding terminals of S ₁₆ (1) ~ (1
2) to output 12-phase alternating current.

The 12-phase AC power supply according to the present invention has been described above with reference to the first to third embodiments. The power supply in these embodiments depends on the purpose of use, installation floor area, capacity, and the like. 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 the insulating electrode holder H. By connecting the discharge electrodes T _{1 to} T ₁₂ and the above-described 12-phase AC power supply in a predetermined connection order, a 12-electrode high-density discharge device is formed. That is, the 12-phase AC output from the secondary winding terminals (1) to (12) of the 12-phase AC power supply is
Than it is connected to allowed to apply the discharge electrodes T ₁ through T ₁₂ to clockwise order (or may be a counterclockwise order). By this connection method, in the region surrounded by the discharge electrodes T _{1 to} T ₁₂ ,
A total of 66 discharges are generated in a two-dimensional or three-dimensional manner without interruption, with uniform discharge directions and high-speed rotation according to the discharge order. 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 to the respective discharge electrodes T _{1 to} T ₁₂ is as follows: 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), the electrode _{T 10; sin (θ + 18π} / 12), the electrode _{T 11; sin (θ + 20π} / 12), the electrode T _12; sin (θ + 22π
/ 12). 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, the voltage between the electrodes T _{1 and} T ₃ ; −cos (θ + 2π / 12), the voltage between the electrodes T _{1 and} T ₄ ;
2 cos (θ + 3π / 12), voltage between electrodes T _{1 and} T ₅ ; -√3 cos
(Θ + 4π / 12), voltage between electrodes T _{1 and} T ₆ ; − (√3 + 1) /
√2 cos (θ + 5π / 12) Voltage between electrodes T _{1 and} T ₇ ; −2 cos (θ + 6π / 12) Voltage between electrodes T _{1 and} T ₈ ; − (√3 + 1) / √2 cos (θ + 7π /
12) Voltage between electrodes T _{1 and} T ₉ ; −√3 cos (θ + 8π / 12), voltage between electrodes T _{1 and} T ₁₀ ; −√2 cos (θ + 9π / 12), electrode T ₁ −
T ₁₁ between voltage; -cos (θ + 10π / 12 ), the between electrodes T ₁ -T ₁₂ voltage ;-( √3-1) / √2cos (θ + 11π / 12).

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
Assuming that the distance between ₃ is L, the distance between electrodes T _{1 and} T ₂ ; (√3
-1) / √2 L, distance between electrodes T _{1 and} T ₄ ; √2 L, 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, electrode T ₁ -T ₁₁
Distance; L, distance between electrodes T _{1 and} T ₁₂ ; (√3-1) / √2L
Becomes

For example, an alternating current of-(√3-1) / √2cos (θ + π / 12) is applied between the electrodes T _{1 and} T _{2 of} the distance; (√3-1) / √2L, 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 As a result, a discharge is generated not only between adjacent electrodes having a short distance but also between other electrodes.

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 electrode T ₂ through T ₁₂ of the discharge electrodes T ₁
Each discharge to is changing every moment,
These discharge changes are performed uniformly. That is, as shown in FIG. 9, the discharge is continuously as the combined vector F obtained by all discharge vectors for the other electrode T ₂ through T ₁₂ Synthesis of electrodes T ₁ is rotated along a locus of elliptical It changes 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 intermediate point between the electrodes T ₈ and T ₉ , the discharge mainly reaches the electrodes T ₈ and T ₉ from the discharge electrode T ₁ while being bent while being divided. . 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 synthetic vector F is present as well in the other electrode T ₂ through T _12. By linking the plurality of rotationally synthesized vectors, a uniform and stable planar or three-dimensional discharge in a vacuum is generated as a whole between the discharge electrodes T _{1 to} T ₁₂ . FIG. 10 shows a state of the planar discharge between the discharge electrodes T _{1 to} T ₁₂ .

FIG. 10 shows the discharge path at each instant when the phase advances by 15 °. The arrows in the figure indicate that the maximum voltage is applied between the electrodes and a discharge current flows in the direction of the arrows. As is clear from FIG. 10, in the discharge device of the present embodiment, a plurality of discharges always occur at any moment at the same time, and the plurality of discharges are aligned and rotated. Discharge is 1 per AC cycle
When a power supply having a frequency of 50 or 60 Hz is used, a planar discharge formed by a plurality of discharges having a uniform direction rotates at a high speed of 50 or 60 times per second.

Further, FIG. 10 shows only the discharge to which the maximum voltage value is applied. However, in actuality, as shown in FIG. 11, a large number of discharges are generated between the other electrodes. The discharge path shown in FIG. 11 is that at the moment when the phase is 0 ° in FIG. When a maximum voltage value is applied between the electrodes and a discharge indicated by a thick arrow occurs, a voltage is applied between the other electrodes as shown by a thin line, although not the maximum value, and a 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 a total of 61 pieces of discharge, in the area surrounded by the electrodes T ₁ ~ electrodes T _12, a generally right towards the drawing, yet it is to occur extremely high density.

In FIG. 11, the discharge path is represented by a straight line for simplicity of the discharge state, and the entire discharge path is mesh-shaped, but the actual discharge is divided as described above. The discharge electrode T ₁
Made on a plane in between through T _12.

As described above, the feature of the high-density discharge generated by the twelve-electrode high-density discharge device according to the present invention is that a tip of each of the electrodes T _{1 to} T ₁₂ is disposed close to a vertex of a regular dodecagon to form a substantially dodecagonal pyramid. Although the formed electrode unit has been described as a planar discharge generated at the tip of the electrode, the high-density discharge is not limited to the planar discharge. For example, the electrode unit is contained in a discharge chamber. Then, when the discharge is started under vacuum, the high-density discharge becomes three-dimensional (substantially a regular 12-sided pyramid frustum) while rotating at high speed as described above in a region surrounded by the electrodes T _{1 to} T _12. It will happen. When the discharge is performed under a vacuum as described above, the electrodes T _{1 to} T ₁₂
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 the phase can be transformed into a phase exchange, the apparatus can be provided at low cost, and the 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, high energy such as high heat and high brightness light due to various discharge phenomena can be generated with high efficiency, and since these discharges are formed into a planar shape or a three-dimensional shape, the use of high energy due to the discharge is not possible. Very easy.

[Brief description of the 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 power supply device according to a third embodiment of 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 diagram of an AC voltage vector applied between electrodes of the 12-electrode high-density discharge device.

FIG. 9 is a combined vector diagram of alternating current applied between electrodes of the device.

FIG. 10 is an explanatory diagram of a discharge path of a 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.

[Description of Signs] 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 3-phase transformer T ₁ through T ₁₂ discharge electrode

Claims (6)

(57) [Claims] 1. The secondary winding side is star-connected as a 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 transformers S ₁ · S two in parallel for each phase of three-phase AC
_7, the transformer S ₉ · S ₃ and the transformer S ₅ · S ₁₁ without the pairs by connecting a winding end of one of the transformer secondary winding of the transformer of each pair connected in parallel as these pairs and connecting the o start winding of the other transformer secondary winding, star and connection group Y which is formed by connecting these connection portions still neutral conductor o _2; 3-phase AC 2 for each phase in parallel Transformers S ₂ and S ₈ , transformers S ₁₀ and S _4, and transformers S ₆ and
No paired by connecting S _12, and connect the parallel-connected to the winding end of one of the transformer secondary winding of the transformer for each pair O start winding of the other transformer secondary winding as these pairs , 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 Are connected in a star-delta manner using the intermediate terminals u ₂ , v ₂ , w ₂ of the three-phase transformer S ₀ , and the neutral line o ₂ and the neutral line o ₃ are further connected. 12 phase AC power supply. 2. In the star connection group Y, an intermediate terminal is provided at a middle point of each phase secondary winding, and all the intermediate terminals are connected to a neutral wire 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. The star-connected neutral wire o ₆
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 each phase secondary winding of ₁₅
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. A star connection of the secondary winding side as the neutral point o _1, and each phase secondary windings _{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 transformers S ₁ · S two in parallel for each phase of three-phase AC
_7, the transformer S ₉ · S ₃ and the transformer S ₅ · S ₁₁ without the pairs by connecting a winding end of one of the transformer secondary winding of the transformer of each pair connected in parallel as these pairs and connecting the o start winding of the other transformer secondary winding, star and connection group Y which is formed by connecting these connection portions still neutral conductor o _2; 3-phase AC 2 for each phase in parallel Transformers S ₂ and S ₈ , transformers S ₁₀ and S _4, and transformers S ₆ and
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 was formed by connecting these connection portions still neutral conductor o _3; including; positive dodecagonal and 12 of the discharge electrodes T ₁ through T ₁₂ disposed in the vicinity of each vertex position A discharge device, wherein the three-phase transformer S ₀ and the star connection group Y
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 connected using the intermediate terminals u ₂ , v ₂ , w ₂ in the three-phase transformer S ₀ , and the neutral line o ₂ and the neutral line o ₃ are further connected to form a star-delta connection. A 12-electrode high-density discharge device, wherein 12-phase alternating currents output from the connection group Y and the delta connection group D are applied in the order of their phases to the discharge electrodes T _{1 to} T ₁₂ in the clockwise or counterclockwise 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} star-connected neutral wire o ₆
An intermediate terminal at the middle point 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; the intermediate terminal is provided at the midpoint of each phase secondary windings, all the intermediate terminal and connected with a neutral wire o _8, and the number of turns of each phase secondary windings, said three-phase transformer S 1 of the number of turns of each phase secondary winding of ₁₅
/ √3 which is a three-phase transformer S _16; positive dodecagonal and 12 of the discharge electrodes T ₁ through T ₁₂ disposed in the vicinity of each vertex position; a discharge device comprising the three-phase AC power source and connecting the three-phase transformer S ₁₅ to the three-phase 4-wire, 3-phase AC power source and a three-phase transformer S ₁₆ and the star - delta connection, further the neutral line o ₇ and neutral o ₈ 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.