JP2000262073A - Pulse power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pulse power supply for reducing heating influence caused by a saturable reactor on a capacitor, in a structure for storing the saturable reactor and a main capacitor circuit in batch in a tank. SOLUTION: A partitioning plate 5 for blocking circulation of an insulating coolant is provided between a saturable reactor 2 and a capacitor 3 for stopping circulation of the coolant between the saturable reactor 2 and the capacitor 3. Instead of the stopping plate 5, a structure for positioning a heat exchanger at a position of the partitioning plate 5 is included. A structure, in which the capacitor 3 provided horizontally at a bottom in a tank 1 with the saturable reactor 2 put thereon, and the heat exchanger provided at an uppermost part, is included also.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse power supply device which combines a pulse generation circuit and a magnetic pulse compression circuit and generates a large current pulse having a narrow width with high repetition. The present invention relates to a device for storing a reactor and a saturable transformer.

[0002]

2. Description of the Related Art FIG. 4 shows an example of such a pulse power supply device. The pulse generating circuit is provided with a first-stage capacitor C ₀ for electric power, and this capacitor C ₀ is initially charged by a high-voltage charger, and 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 . Saturable reactor S
I ₀ saturates after the semiconductor switch SW is completely turned on to generate a pulse current I ₀ , thereby reducing the duty of the switch SW.

[0003] A two-stage magnetic pulse compression circuit is cascaded on the secondary side of the pulse transformer PT, and a pulse current I boosted by the pulse transformer PT is used in the first stage magnetic pulse generation circuit.
₁ capacitor C ₁ is high charged in this capacitor C ₁
Which supplies the charging voltage saturable reactors SI ₁ is the next stage of the magnetic pulse compression circuit shown polarity of the pulse current I ₂ narrow that magnetic pulse compression by operating magnetic switches. Similarly, the magnetic switch operation of the saturable reactor SI _2, with magnetic pulse compression pulse width, and outputs the pulse current I ₃ in the shown polarity.

The pulse output of the magnetic pulse compression circuit supplies a narrow, high-voltage pulse current with high repetition to a load such as a chamber of a laser head.

[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. The circuit components are housed in an oil-tight tank containing an insulating refrigerant such as insulating oil or florinate which serves as a cooling means. Further, since the capacitors C ₁ and C ₂ are arranged close to each other so that a narrow pulse current can flow between them and the saturable reactor, the capacitors C ₁ and C ₂ are collectively housed in an oil-tight tank. A heat exchanger is provided in the oil-tight tank for cooling.

In some cases, only a saturable reactor, a pulse transformer, and a saturable transformer, which are main heating elements, are housed in a tank, and a capacitor is provided outside the tank.

[0007]

When a main circuit component having a core and a capacitor connected to the core are housed together in an oil-tight tank, the capacitor generates a small amount of heat.
It can be arranged close to the same refrigerant as the saturable reactor or the like.
In this case, the temperature of the capacitor rises due to the heat generated by the saturable reactor or the like, and the capacitance rises at the start and end of the operation of the device due to the temperature rise. There is a problem that the waveform and the output timing change.

In a structure in which only a saturable reactor having a core is accommodated in a tank, the influence of heat generation on the capacitor can be eliminated. However, since the saturable reactor and the capacitor are connected to each other, the saturable reactor and the like are connected. The structure is such that a terminal in consideration of insulation and oil tightness is added to the tank containing. In this case, the device configuration becomes large, and the length of the saturable reactor and the connecting conductor of the capacitor increases the inductance interposed between them, and the narrow pulse becomes dull. Becomes

An object of the present invention is to provide a pulse power supply device in which a capacitor is less thermally affected by a saturable reactor or the like in a structure in which a saturable reactor or the like and a main circuit component of the capacitor are collectively stored in a tank. To provide.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a structure in which a partition plate or a heat exchanger is arranged between a heating element such as a saturable reactor and a capacitor, or a structure in which a capacitor is mounted on a tank. The structure arranged at the bottom blocks heat transfer from the heating element to the capacitor, and has the following features.

[0011] In a pulse power supply device having a structure in which a main circuit component having a core such as a saturable reactor or a pulse transformer, and a capacitor and a heat exchanger connected to the main circuit component are housed in a cooling tank together with an insulating refrigerant, A tank housing structure in which a partition plate or the heat exchanger that blocks convection of the insulating refrigerant between the circuit component and the capacitor is disposed.

Further, in a pulse power supply device having a structure in which a main circuit component having a core such as a saturable reactor or a pulse transformer and a capacitor and a heat exchanger connected to the main circuit component are housed in a cooling tank together with an insulating refrigerant, The tank storage structure is characterized in that the condenser is laid down on the bottom of the tank, the main circuit components are disposed above the condenser, and the heat exchanger is disposed on the top.

[0013]

FIG. 1 shows a tank storage structure according to an embodiment of the present invention. Saturable reactor 2 in tank 1
The condenser 3 is arranged in the tank 1 on the side of the saturable reactor 2, and the heat exchanger 4 is arranged in the insulating refrigerant above the saturable reactor 2 and the condenser 3, and the saturable reactor 2 is disposed. A partition plate 5 is provided between the capacitor and the capacitor 3.

The partition plate 5 is made of a member having electrical insulation and heat insulation, extends from the bottom of the tank 1 to the position of the heat exchanger 4, and performs convection cooling around the saturable reactor 2. The refrigerant and an insulating refrigerant that convectively cools the periphery of the condenser 3 are partitioned so as not to mix with each other.

The saturable reactor 2 and the capacitor 3
Are passed through the holes provided in the partition plate 5. This penetration is a structure that simply passes the conductor 6 through the hole,
It is preferable to use a plug structure that can prevent the insulating refrigerant from leaking through the through portion.

According to the structure of this embodiment, the insulating refrigerant is
As shown by arrows in the convection path, cooling is performed in the tank 1 by performing natural convection in which the saturable reactor 2 and the condenser 3 are separated by a partition plate 5 and separated from each other.

As a result, the heat generated by the saturable reactor 2 is less transmitted to the capacitor 3 side, and the temperature rise of the capacitor 3 due to the heat generated by the saturable reactor 2 can be prevented. Moreover, the saturable reactor 2 and the capacitor 3 can be arranged close to each other and connected by the short conductor 6.

FIG. 2 is a tank storage structure showing another embodiment of the present invention. 1 differs from FIG. 1 in that the heat exchanger 4 is vertically arranged at the position of the partition plate 5 instead of the partition plate 5.

The heat exchanger 4 has a vertical structure.
The longitudinal direction is arranged between the saturable reactor 2 and the condenser 3 with the vertical direction of the tank. The heat exchanger 4
Is a conductor having a void portion that can penetrate the connection conductor 6.
This is preferable in shortening the length of

Also in this structure, as in the case of FIG. 1, natural convection of the insulating medium is substantially cut off between the saturable reactor 2 and the condenser 3 by the heat exchanger 4, and the condenser 3 is connected to the saturable reactor 2 by the heat exchanger 4. The influence of heat generation can be reduced.

FIG. 3 shows a tank storage structure showing another embodiment of the present invention. In the present embodiment, the condenser 3 is arranged on the bottom of the tank 1, the saturable reactor 2 is arranged above the condenser 3, and the heat exchanger 4 is arranged at the top.

In this structure, the insulating refrigerant in the tank 1 rises at the position of the saturable reactor 2, is cooled at the position of the heat exchanger 4, flows along the side of the tank, and naturally convects along the path leading to the bottom. Therefore, when the insulating refrigerant convects to the position of the condenser 3, it is cooled by the heat exchanger 4, and the heat generated by the saturable reactor 2 rarely raises the temperature of the condenser 3.

In each of the above embodiments, a device for storing a saturable reactor and a capacitor in a tank is shown, but a structure for thermally insulating a saturable transformer or a pulse transformer serving as a heating element and a capacitor connected to the saturable transformer or pulse transformer is connected. The same operation and effect can be obtained.

In addition, the same effect can be obtained by applying the main circuit to a gas-sealed tank or a device that is simply stored in a case instead of the oil-tight tank, and the refrigerant is forcedly circulated in addition to natural convection. Applicable to the method.

Although the case where one heat exchanger is provided has been described, the present invention can be applied to a structure having a plurality of heat exchangers. In particular, in the configuration of FIG. 2, a gap portion through which the connection conductor 6 penetrates is provided in a parallel portion between the heat exchangers, and can be easily realized.

Further, the main circuit configuration of the pulse power supply device is as follows.
The tank storage structure of the present invention is applicable not only to the two-stage pulse compression circuit shown in FIG. 4 but also to a device having a modified main circuit, for example, a device using a saturable transformer instead of a pulse transformer.

[0027]

As described above, according to the present invention, the heating element has a structure in which a partition plate or a heat exchanger is arranged between the heating element and the condenser, or a structure in which the condenser is arranged at the bottom of the tank. Since the heat transfer from the capacitor to the capacitor is blocked, it is possible to reduce the thermal influence of the capacitor from the heating element such as the saturable reactor, and to prevent the pulse output waveform and output timing from changing due to the temperature rise of the capacitor. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a tank storage structure (part 1) showing an embodiment of the present invention.

FIG. 2 is a tank storage structure (part 2) showing another embodiment of the present invention.

FIG. 3 is a tank storage structure (part 3) showing another embodiment of the present invention.

FIG. 4 is a circuit example of a pulse power supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tank 2 ... Saturable reactor 3 ... Condenser 4 ... Heat exchanger 5 ... Partition plate 6 ... Connection conductor

Claims (2)

[Claims] 1. A pulse power supply device having a structure in which a main circuit component having a core such as a saturable reactor or a pulse transformer, and a capacitor and a heat exchanger connected to the main circuit component are housed in a cooling tank together with an insulating refrigerant. A pulse power supply device having a tank storage structure in which a partition plate or the heat exchanger that blocks the convection of the insulating refrigerant between the main circuit component and the capacitor is disposed. 2. A pulse power supply device having a structure in which a main circuit component having a core such as a saturable reactor or a pulse transformer and a capacitor and a heat exchanger connected to the main circuit component are housed together with an insulating refrigerant in a cooling tank. Laying the condenser on the bottom of the tank,
A pulse power supply device having a tank housing structure in which the main circuit components are arranged above the condenser and the heat exchanger is arranged at the top.