KR200261169Y1 - A double voltage rectifier for thermal plasma - Google Patents

Abstract

The present invention relates to a high voltage plasma double voltage stop, to reduce the number of windings of the secondary coil of the high frequency transformer of the inverter circuit portion to double voltage rectification of the low voltage generated, to compensate for the voltage at the initial arc generation, and then to maintain the arc The present invention relates to a high voltage plasma voltage-voltage stop for increasing efficiency by compensating a reduced resistance value with high current. The present invention for this purpose is an inverter circuit unit for applying a high frequency alternating current to the secondary coil of the high frequency transformer by inverting the direct current flowing from the low frequency rectifying unit rectifying the AC power supplied from the power supply unit, and the high frequency alternating current introduced from the inverter circuit unit A high temperature plasma stop comprising a high frequency rectifying unit for rectifying and discharging between electrodes, characterized in that it comprises a charging unit which is charged with a double voltage by the amount of electricity rectified from the high frequency rectifying unit and discharges a high pressure between the electrodes.

Description

High Voltage Plasma Voltage Stopper {A DOUBLE VOLTAGE RECTIFIER FOR THERMAL PLASMA}

The present invention relates to a double voltage stop for high temperature plasma, and more specifically, to reduce the number of windings of the secondary coil of the high frequency transformer of the inverter circuit part to double voltage rectifying the generated low voltage to compensate for the voltage at the initial arc generation. Thereafter, the present invention relates to a high-voltage plasma voltage distribution threshold for increasing efficiency by compensating a reduced resistance value during arc holding by a high current.

In general, high voltage is required due to the large resistance caused by the plasma gas between the electrodes in order to generate the arc at the time of welding and cutting operation using the high temperature plasma. As it is reduced, high current is required.

This is briefly described with reference to the accompanying FIG. 1 as follows.

1 is a power system circuit diagram showing a high temperature plasma stop according to the prior art.

According to this, the 60 kW AC power supplied from the power supply unit 10 is converted into direct current by the low frequency rectifying unit 20, and then switched to high frequency by the high frequency switching unit 31a of the inverter circuit unit 30a, thereby converting the high frequency transformer. A high frequency alternating current is induced in the secondary coil of the portion 32a. Subsequently, an arc flame 70 is generated and maintained by a high-pressure discharge caused by the medium of the plasma gas 60 converted into a direct current by the high frequency rectifying unit 40a and supplied between the cathode 50a and the anode 50b. It is composed.

Here, in order to generate the plasma by the high-pressure discharge initially, the voltage (no load voltage) of the secondary coil of the high frequency transformer portion 32a should be 250 [V] or more. The reason is that a high voltage is required because the plasma gas between the cathode 50a and the anode 50b has a large resistance value. In order to implement this, the number of turns of the secondary coil of the high frequency transformer 32a must be increased.

Subsequently, during the plasma holding, the resistance decreases rapidly due to the arc between the cathode 50a and the anode 50b, so that the anode is almost short-circuited. That is, since the resistance (R) decreases rapidly at work amount (W) = I ² R between the anodes, a high current is required. In order to implement this, the number of turns of the secondary coil of the high frequency transformer 32a must be reduced.

However, according to the prior art as described above, there is a problem in that it is impossible to simultaneously provide a high voltage required for initial arc generation and a high current required for arc maintenance.

Accordingly, the present invention is to solve the above-mentioned conventional problems, and its purpose is to reduce the number of windings of the secondary coil of the high frequency transformer of the inverter circuit to double voltage rectifying the low voltage generated to compensate for the voltage at the initial arc generation. Thereafter, the reduced resistance value at the time of the arc holding is compensated by the high current to provide a high-voltage plasma voltage limiter for increasing the efficiency.

1 is a power system circuit diagram showing a high temperature plasma stop according to the prior art.

Figure 2 is a power system circuit diagram showing a high-voltage plasma voltage distribution voltage stop according to the present invention.

<Description of main parts of drawing>

10: power supply unit 20: low frequency rectifier

30b: inverter circuit section 31a: high frequency switching section

32b: high frequency transformer 40b: double pressure rectifier

45 to 48: first to fourth capacitors

Features of the high-voltage plasma voltage divider according to the present invention for achieving the above technical problem,

Inverter circuit unit for applying high frequency AC to the secondary coil of the high frequency transformer by inverter direct current flowing from the low frequency rectifying unit rectifying AC power supplied from the power supply unit, and rectifying the high frequency AC supplied from the inverter circuit unit to discharge the electrode A high temperature plasma stop comprising a high frequency rectifying unit, wherein the high voltage rectifying unit includes a charging unit which is charged at a double voltage by the amount of electricity rectified from the high frequency rectifying unit and discharges a high pressure between the electrodes.

The number of windings of the secondary coil of the high frequency transformer is reduced so that low voltage, high current power supply is achieved.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a power system circuit diagram showing a high voltage plasma voltage double voltage stop according to the present invention.

As shown, the configuration of the present invention is largely the power supply unit 10, the low frequency rectifying unit 20, the inverter circuit portion 30b, the double voltage rectifying portion 40b, the cathode 50a, the anode 50b and And a plasma gas 60 and an arc flame 70.

The low frequency rectifying unit 20 converts AC power of 60 kW from the power supply unit 10 into direct current.

The inverter circuit section 30b is composed of a high frequency switching section 31a and a high frequency transformer section 32b.

The high frequency switching unit 31a switches the direct current of the low frequency converted from the low frequency rectifying unit 20 to a high frequency state, and the high frequency transformer unit 32b is an alternating current in a high frequency state switched by the high frequency switching unit 31a. To the secondary coil. At this time, by reducing the number of turns of the secondary coil of the high frequency transformer 32b to a low voltage and high current type, the high frequency alternating current flows through the secondary coil of the high frequency transformer 32b.

The double back pressure rectifying unit 40b includes a first rectifying diode 41, a second rectifying diode 42, a third rectifying diode 43, a fourth rectifying diode 44, and a first condenser 45, It consists of the 2nd capacitor | condenser 46, the 3rd capacitor | condenser 47, and the 4th capacitor | condenser 48. As shown in FIG.

When the polarity of the high frequency AC current flowing through the secondary coil is positive (+) or negative (-) for the first half cycle, the first capacitor 45 and the fourth capacitor 48 have the high frequency. The high frequency alternating current flowing from the secondary coil of the transformer unit 32b is charged with respective amounts of electricity by rectification through the second rectifying diode 42 and the third rectifying diode 43, and through the secondary coil. When the polarity of the flowing high frequency alternating current is reversed to become a negative electrode (+) and a positive electrode (+), the second capacitor 46 and the third capacitor 47 are connected to the secondary coil of the high frequency transformer unit 32b. Flowing high-frequency alternating current is charged to the respective amount of electricity by rectification through the first rectifying diode 41 and the fourth rectifying diode 44.

As described above, the amount of electricity charged in the first to fourth capacitors 45, 46, 47, and 48 is discharged at a double voltage between the cathode 50a and the anode 50b, and the plasma gas 60 is used as a medium. Arc flame 70 is generated.

Referring to the action by the high-voltage plasma voltage distribution threshold of the present invention configured as described above are as follows.

First, the 60 kW AC power supplied from the power supply unit 10 is converted into direct current by the low frequency rectifier 20. Subsequently, it is switched to a high frequency state through the high frequency switching part 31a of the inverter circuit part 30b, is converted into a high frequency alternating current by the high frequency transformer part 32b, and is guide | induced to a secondary coil. At this time, since the number of turns of the secondary coil of the high frequency transformer 32b becomes smaller than that of the conventional winding, the low voltage and high current type are obtained.

Subsequently, when the polarity of the high frequency alternating current flowing through the secondary coil of the high frequency transformer unit 32b is positive (+) and negative (-) in a half cycle, the first capacitor 45 and the fourth capacitor ( 48 is filled with high-frequency alternating current flowing from the secondary coil of the high-frequency transformer unit 32b at respective amounts of electricity by rectification through the second rectifying diode 42 and the third rectifying diode 43. When the polarity of the high frequency AC current flowing through the secondary coil in the half cycle is reversed to become a negative electrode (+) or a positive electrode (+), the second capacitor 46 and the third capacitor 47 may include the high frequency transformer. The high frequency alternating current flowing from the secondary coil of the part 32b is charged with respective amounts of electricity by rectification through the first rectifying diode 41 and the fourth rectifying diode 44. As described above, the amount of electricity charged in the first to fourth condensers 45, 46, 47, and 48 is discharged at high speed between the cathode 50a and the anode 50b, and thus the initial stage using the plasma gas 60 as a medium. Generate arc flame 70.

Subsequently, the sudden decrease in resistance between the cathode 50a and the anode 50b generated during the arc holding is enhanced by supplying a high current according to the decrease in the number of turns of the secondary coil of the high frequency transformer 32b to increase efficiency. .

In the above described and illustrated with respect to a preferred embodiment of the present invention, this subject matter is not limited to the above-described embodiment, the general knowledge in the field to which the present invention belongs without departing from the spirit of the present invention claimed in the claims Anyone with a variety of modifications can be made, as well as such modifications are within the scope of the claims.

As described above, according to the high voltage plasma double voltage stop value of the present invention, the voltage at the time of initial arc generation is compensated by reducing the number of turns of the secondary coil of the high frequency transformer of the inverter circuit part, thereby rectifying the voltage. There is an effect of increasing the efficiency by compensating the reduced resistance value at the time of holding by a high current.

Claims (2)

Inverter circuit section 30a for applying a high frequency alternating current to the secondary coil of the high frequency transformer section 32a by inverter direct current flowing from the low frequency rectifying section 20 for rectifying the AC power supplied from the power supply section 10, and the inverter. In the high temperature plasma stop value including the high frequency rectification part 40a which rectifies the said high frequency alternating current injected from the circuit part 30a, and discharges between electrodes, And a charging unit configured to charge at a double voltage by the amount of electricity rectified from the high frequency rectifier 40a and discharge the high voltage between the electrodes. The method of claim 1, High-voltage plasma voltage limiter, characterized in that the low-voltage, high-current power supply is made by reducing the number of turns of the secondary coil of the high frequency transformer (32a).