JP4038918B2 - Pulse power supply - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pulse power supply device that combines a pulse generation circuit and a magnetic pulse compression circuit to generate a large current pulse with a high repetition rate, and in particular, a pulse transformer stored in a tank, a saturable reactor, and an input / output terminal. Concerning connection structure.
[0002]
[Prior art]
An example of a conventional pulse power supply device is shown in FIG. The pulse generation circuit is provided with a first-stage capacitor C ₀ for power, and this capacitor C ₀ is initially charged by a high-voltage charger. When the semiconductor switch SW is turned on, the pulse transformer PT is passed from the capacitor C ₀ through the saturable reactor SI _0. Is supplied with a pulse current I ₀ . The saturable reactor SI ₀ reduces the duty of the switch SW by generating a pulse current I ₀ by performing a saturation operation after the semiconductor switch SW is completely turned on.
[0003]
A two-stage magnetic pulse compression circuit is cascaded on the secondary side of the pulse transformer PT. In the first-stage magnetic pulse generation circuit, the capacitor C ₁ is charged with a high voltage by the pulse current I ₁ boosted by the pulse transformer PT. _{When the} saturable reactor SI ₁ operates as a magnetic switch at a charge voltage of ₁ , a narrow pulse current I ₂ compressed by magnetic pulses is supplied to the magnetic pulse compression circuit of the next stage with the polarity shown in the figure. Similarly, magnetic pulse compression with a pulse width is performed by the magnetic switch operation of the saturable reactor SI ₂ , and the pulse current I ₃ is output with the illustrated polarity.
[0004]
The pulse output of the magnetic pulse compression circuit supplies a pulse current of a narrow width and a high voltage to a load such as a chamber of a laser head with high repetition.
[0005]
Here, the saturable reactors SI _{0 to} SI ₂ and the pulse transformer PT have a high repetitive pulse current flowing through the windings, causing eddy current loss in the core and increasing the core temperature. It is stored in an oil-tight tank as a cooling means. Further, since the capacitors C ₁ and C ₂ are arranged close to each other so as to allow a narrow pulse current to flow between them and the saturable reactor, they are collectively stored in an oil-tight tank.
[0006]
As described above, as a device configuration, a main circuit in which a saturable reactor, a pulse transformer, and a capacitor are connected in a circuit is collectively stored in an oil-tight tank, and is connected to an external circuit through an input / output terminal.
[0007]
FIG. 8 is a sectional view showing the connection structure of the output terminal portion. In the output terminal 1, the in-tank protruding portion 1 </ b> A has a screw structure, and the protruding portion 1 </ b> A passing through the insulating member 4 fixed to the bottom plate (ground terminal) 3 of the oil-tight tank 2 is stopped with a nut 1 </ b> B. The insulating member 4 is attached to the oil-tight tank 2 with an O-ring 4A or the like in a liquid-tight structure. A conductor 5 for obtaining connection with the core winding is fastened to the tip of the in-tank protruding portion 1A of the output terminal 1 with a screw or the like.
[0008]
The toroidal core 6 of the saturable reactor SI ₂ is attached in a standing state on the bottom plate 3 by a fixing insulator 7. The core winding 8 wound around the toroidal core 6 has one end connected to the capacitor 9 (capacitor C ₂ ) and the other end connected to the conductor 5.
[0009]
FIG. 9 is a cross-sectional view showing the connection structure of the input terminal portion. The P-side and N-side input terminals 11 _P and 11 _N have a pin structure and have in-tank protruding portions that penetrate through the insulating member 12 provided on the side plate of the oil-tight tank 2. The insulating member 12 is attached to the tank 2 with a liquid-tight structure such as an O-ring 12A.
[0010]
The saturable reactor SI ₀ and the toroidal cores 13 and 14 of the pulse transformer PT are attached in a standing state on the bottom plate 3 by a fixing insulator 15. The core winding 16 wound around the toroidal core 13 has one end connected to the input terminal 11 _P and the other end connected to one end of the primary winding 17 of the toroidal core 14. The other end of the primary winding 17 is connected to the input terminal 11 _N. Further, the secondary winding 18 of the toroidal core 14 is connected to a capacitor C ₁ or the like although not shown.
[0011]
[Problems to be solved by the invention]
In the conventional connection structure of the input / output terminal, the saturable reactor, and the pulse transformer, the length of the conductor connecting the winding and the input / output terminal increases, and the loop inductance L of this portion increases. This inductance L is a factor that hinders narrowing of the pulse current flowing through the winding.
[0012]
Specifically, in the case of FIG. 8, it is necessary to fix the saturable reactor composed of the core 6 etc. avoiding the position of the terminal 1 protruding into the tank, so that the connection between the output terminal 1 and the core winding 8 is possible. In this case, the conductor 5 is interposed, and the inductance of this portion causes the output pulse current I ₃ to be dull. In addition, the resistance value of the conductor 5 increases the internal impedance of the pulse power supply. Further, the conductor 5 increases the number of parts.
[0013]
In the connection between the input terminals 11 _P and 11 _N and the windings 16 and 17 in FIG. 9, a gap between the input terminal and the cores 13 and 14 becomes large, and a winding (or conductor) for routing this portion. This causes the input pulse current I ₀ to become dull. In addition, an increase in the gap leads to an increase in size and weight of the tank 2 itself, and an increase in the amount of insulating oil required. Further, since the windings 16 and 17 are individually wound around the cores 13 and 14, respectively, the size of the reactor and the transformer itself is increased, and an extra terminal 19 is required for mutual connection.
[0014]
An object of the present invention is to provide a pulse power supply apparatus that can reduce the intervention of inductance in a connection structure between an input / output terminal provided in a tank and a saturable reactor and a pulse transformer housed in the tank and can be made compact.
[0015]
[Means for Solving the Problems]
In order to solve the above problems, the present invention makes the radial direction of a toroidal core such as a saturable reactor perpendicular to the direction in which the in-tank protruding portion of the input / output terminal protrudes into the tank, and the protruding portion has a toroidal core. Are arranged close to each other, or have a structure in which the protruding portion penetrates the toroidal core or extends to the toroidal core position, and has the following configuration.
[0016]
(First invention)
A main circuit component having a toroidal core such as a saturable reactor or a pulse transformer is stored in a tank, and the core winding of the main circuit component is connected to an input terminal or an output terminal provided in the tank to input / output pulse current. In the obtained pulse power supply device,
The output terminal or the input terminal has a projecting portion whose tip projects into the tank,
Having an insulating support plate fixed orthogonally in close proximity to the protrusion,
The toroidal core has a structure in which a radial direction thereof is fixed to the support plate so as to be orthogonal to a direction in which the protruding portion protrudes into the tank.
[0017]
(Second invention)
A main circuit component having a toroidal core such as a saturable reactor or a pulse transformer is stored in a tank, and the core winding of the main circuit component is connected to an input terminal or an output terminal provided in the tank to input / output pulse current. In the obtained pulse power supply device,
The output terminal or the input terminal has a projecting portion whose tip projects into the tank,
Having an insulating plate orthogonal to the projecting portion and fixed to the projecting portion through the projecting portion;
The toroidal core is fixed to the insulating plate with its radial direction orthogonal to the direction in which the protruding portion protrudes into the tank,
The protrusion may have a structure that penetrates the toroidal core as a part of the core winding or a structure that extends as a part of the core winding.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
FIG. 1 is a cross-sectional view of an output terminal portion showing an embodiment of the present invention. 8 differs from FIG. 8 in that the toroidal core 6 is placed horizontally and directly above the output terminal 1 and is fixed by a fixed object 22 and a support plate 21 instead of the fixing insulator 7.
[0020]
The insulating support plate 21 is cantilevered (or supported on both sides) directly above the in-tank protruding portion 1A of the output terminal 1 by a fixed object 22 fixed to the bottom plate 3, and the toroidal core 6 and the core winding are provided thereon. A saturable reactor SI ₂ consisting of 8 is fixed horizontally.
[0021]
That is, the in-tank protruding portion 1A of the output terminal 1 is disposed close to the protruding portion 1A with the radial direction of the toroidal core 6 (in the direction of the arrow arrow RA) orthogonal to the direction in which the protruding portion in the tank 2 projects.
[0022]
One end of the core winding 8 is connected to the capacitor 9 and the other end is directly connected and fixed to the protruding portion 1A.
[0023]
According to this connection structure, since the toroidal core 6 is placed horizontally and directly above the projecting portion 1A, the connection between the core winding 8 and the output terminal 1 is directly connected without using the conventional conductor 5, That is, the shortest connection is achieved, and the cause of the output pulse current I ₃ being blunted can be eliminated without interposing the inductance of the connection conductor. Further, the resistance value of the conductor 5 does not increase the internal impedance of the pulse power supply. Further, the installation space can be reduced and the size can be reduced.
[0024]
(Second Embodiment)
FIG. 2 is a cross-sectional view of the output terminal portion showing the embodiment of the present invention. 1 is different from FIG. 1 in that the insulating fixture 22 is omitted, the insulating plate 23 is supported by the in-tank protruding portion 1A of the output terminal 1, and the toroidal core 6 is fixed horizontally on the insulating plate 23. In the point. In FIG. 2, the insulating plate 23 is fixed to the projecting portion 1A with a screw 24, and the toroidal core 6 is fixed thereon.
[0025]
According to this connection structure, in addition to obtaining the same operational effects as in the case of FIG. 1, the fixed object 22 can be omitted, and the number of parts can be reduced and the number of assembly steps can be reduced.
[0026]
(Third embodiment)
FIG. 3 is a cross-sectional view of the output terminal portion showing the embodiment of the present invention. 2 differs from FIG. 2 in the structure in which the in-tank protruding portion 1A of the output terminal 1 is extended to a position where the toroidal core 6 penetrates, and the insulating plate 23 is fixed to the protruding portion 1A.
[0027]
The protruding portion 1 </ b> A of the output terminal 1 is extended to the height of the hollow portion of the toroidal core 6. The insulating plate 23 is fitted into the protruding portion 1A and is sandwiched between a pair of nuts 1B and 1C that are screwed into the protruding portion 1A. Then, one end of the core winding 8 is connected at the tip of the projecting portion 1 </ b> A that is higher than the height of the toroidal core 6.
[0028]
According to this connection structure, in addition to obtaining the same function and effect as in FIG. 1 or 2, the projecting portion 1 </ b> A can be used as a part of the core winding 8 by penetrating the toroidal core 6. In addition, the number of turns required for the core winding 8 can be reduced, and the loop inductance can be reduced since the cross-sectional area of the protrusion 1A is large. Further, compared to the structure of FIG. 2, the height position of the insulating plate 23 can be lowered, and the installation space can be further reduced.
[0029]
(Fourth embodiment)
FIG. 4 is a cross-sectional view of the input terminal portion showing the embodiment of the present invention. 9 is different from FIG. 9 in that the toroidal cores 13 and 14 are brought closer to the input terminals 11 _P and 11 _N , and the protruding portion of the input terminal 11 _P protruding into the tank 2 penetrates the toroidal core 13 and is wound. The point is that it is also used as a part of the line 16.
[0030]
The winding 16 of the toroidal core 13 and the primary winding 17 of the toroidal core 14 are wound below the respective cores. These tanks mounting position of the input terminal 11 _P fit within the height position tank windings 16 and 17 is changed, the winding projection projecting into the tank of the input terminal 11 _P extends through a toroidal core 13 16 is connected to one end. Further, the protruding portion of the input terminal 11 _{N in} the tank extends to the position of the toroidal core 14 and is connected to one end of the winding 17.
[0031]
According to this connection structure, since the protruding portion in the tank of the input terminal 11 _P penetrates the toroidal core 13 and is connected to the winding 16, the protruding portion in the tank of the input terminal is also used as a part of the winding 16. In addition, the gap between the input terminals 11 _P and 11 _N and the core windings 16 and 17 can be reduced, and the length of the connecting conductor therebetween can be shortened. As a result, the number of turns of the core winding 16 can be reduced and the loop inductance can be reduced.
[0032]
Therefore, the gap between the input terminal and the toroidal core can be reduced, and the factor of dulling the input pulse current I ₀ can be eliminated by reducing the inductance. Further, since the gap is reduced, the tank 2 itself can be reduced in size and weight, and the required amount of insulating oil can be reduced.
[0033]
(Fifth embodiment)
FIG. 5 is a cross-sectional view of the input terminal portion showing the embodiment of the present invention. 4 is different from FIG. 4 in that the number of windings of the toroidal core 13 is one turn and the in-tank protruding portion of the input terminal 11 _P is passed through the toroidal cores 13 and 14.
[0034]
The in-tank protruding portion of the input terminal 11 _P is extended to a position penetrating the toroidal cores 13 and 14. Further, the in-tank protruding portion of the input terminal 11 _N is extended to the position of the toroidal core 14. The primary winding 17 of the toroidal core 14 is connected between the in-tank protrusions of the input terminals 11 _P and 11 _N. The primary winding 17 </ b> A shows a structure when the toroidal core 14 is wound two or more turns.
[0035]
According to this connection structure, the same effect as in the case of FIG. 4 can be obtained, and in addition, the core winding 16 of the toroidal core 13 is shared by the protruding portion protruding into the tank of the input terminal 11 _P. Furthermore, it can also be used as a part of the primary winding 17 (or 17A) of the toroidal core 14, and the number of windings required for the toroidal core can be reduced.
[0036]
(Sixth embodiment)
FIG. 6 is a cross-sectional view of the input terminal portion showing the embodiment of the present invention. 5 differs from FIG. 5 in that the primary winding 17B wound around the toroidal core 14 is also wound around the toroidal core 13 together.
[0037]
The in-tank protruding portion of the input terminal 11 _P is extended to a position penetrating the toroidal cores 13 and 14. Further, the in-tank protruding portion of the input terminal 11 _N is extended to the position of the toroidal core 14. The primary winding 17B of the toroidal core 14 is wound by bundling the toroidal cores 13 and 14, and is connected between the in-tank protrusions of the input terminals 11 _P and 11 _N.
[0038]
That is, the toroidal cores 13 and 14 become toroidal cores of main circuit components that are connected in series in circuit, and instead of winding each of them, both toroidal cores are wound together with one winding. Connect to the protruding part in the tank.
[0039]
According to this connection structure, in addition to obtaining the same operational effects as in the case of FIG. 5, the number of core windings of the toroidal core 13 can be two or more turns. Further, the number of winding work steps for the winding can be reduced, and the conventional terminal 19 becomes unnecessary.
[0040]
In the present embodiment, it is effective to reduce the number of winding man-hours even in a structure in which the protruding portion in the tank of the input terminal does not penetrate the toroidal core 13.
[0041]
Each of the above embodiments is shown as a device that houses a main circuit in an oil-tight tank, but the same effect can be obtained by applying the main circuit to a gas-sealed tank or a device that simply houses a case.
[0042]
Moreover, the attachment position of the terminal can be changed as appropriate, such as a structure in which the output terminal is attached to the tank at the attachment position to the tank, or a structure in which the input terminal is attached to the tank bottom plate. Furthermore, the assembly structure of the output terminal 1 and the insulating member 4 is a pin type, and the assembly structure of the input terminal and the insulating member 12 is a screw type.
[0043]
4 to 6, the core windings 16, 17, 17 </ b> A, and 17 </ b> B can be wound around the top of the toroidal cores 13 and 14.
[0044]
Furthermore, the main circuit configuration of the pulse power supply device is not limited to that of the two-stage pulse compression circuit shown in FIG. 7, but may be a device having a modified main circuit, for example, a device using a saturable transformer instead of a pulse transformer. The connection structure of the present invention can be applied.
[0045]
【The invention's effect】
As described above, according to the present invention, the radial direction of a toroidal core such as a saturable reactor is orthogonal to the direction in which the protruding portion in the tank of the input / output terminal protrudes into the tank, and the toroidal core is brought close to the protruding portion. Because the structure is arranged or the protruding part penetrates the toroidal core or extends to the toroidal core position, steep pulse input / output is achieved by reducing the intervention of inductance in the connection between the input / output terminal and the saturable reactor, etc. In addition, the apparatus can be made compact and the apparatus can be reduced in size and weight.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an output terminal portion showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an output terminal portion showing another embodiment of the present invention.
FIG. 3 is a cross-sectional view of an output terminal portion showing another embodiment of the present invention.
FIG. 4 is a cross-sectional view of an input terminal portion showing another embodiment of the present invention.
FIG. 5 is a cross-sectional view of an input terminal portion showing another embodiment of the present invention.
FIG. 6 is a cross-sectional view of an input terminal portion showing another embodiment of the present invention.
FIG. 7 is a circuit example of a pulse power supply device.
FIG. 8 is a cross-sectional view of a conventional output terminal portion.
FIG. 9 is a cross-sectional view of a conventional input terminal portion.
[Explanation of symbols]
1 ... output terminal 1A ... protrusion 1B of the output terminal, 1C ... nut 2 ... oil-tight tank 3 ... bottom plate 8, 16 ... core windings 11 _P, 11 _N ... input terminal 17 ... primary winding 6,13,14 ... toroidal core 17 and 17A, 18 ... secondary winding 21, 23 ... support plate 22 ... fixture _{SI 0, SI 1, SI 2} ... saturable reactors PT ... pulse transformer

Claims (2)

A main circuit component having a toroidal core such as a saturable reactor or a pulse transformer is stored in a tank, and the core winding of the main circuit component is connected to an input terminal or an output terminal provided in the tank to input / output pulse current. In the obtained pulse power supply device,
The output terminal or the input terminal has a projecting portion whose tip projects into the tank,
Having an insulating support plate fixed orthogonally in close proximity to the protrusion,
The pulse power supply device, wherein the toroidal core has a structure in which a radial direction of the toroidal core is fixed to the support plate so as to be orthogonal to a direction in which the protrusion protrudes into the tank. A main circuit component having a toroidal core such as a saturable reactor or a pulse transformer is stored in a tank, and the core winding of the main circuit component is connected to an input terminal or an output terminal provided in the tank to input / output pulse current. In the obtained pulse power supply device,
The output terminal or the input terminal has a projecting portion whose tip projects into the tank,
Having an insulating plate orthogonal to the projecting portion and fixed to the projecting portion through the projecting portion;
The toroidal core is fixed to the insulating plate with its radial direction orthogonal to the direction in which the protruding portion protrudes into the tank,
The pulse power supply device according to claim 1, wherein the protruding portion has a structure penetrating the toroidal core as a part of the core winding or a structure extending as a part of the core winding.

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