RUPAC2012 - List of Authors (Protopopov, A.Yu.)

Paper	Title	Page
WEPPC030	High-Voltage Source with Output Voltage up to 110 kV with Output Current up to 100 mA	506
	I.A. Gusev, A.S. Medvedko, A.Yu. Protopopov, D.N. Pureskin, D.V. Senkov BINP SB RAS, Novosibirsk, Russia
	The presented report contains the description of high-voltage source with output voltage up to 110 kV and output current up to 100 A. The source consist of the chopper with IGBT switches working with a principle of pulse-width modulation and the full H-bridge converter with IGBT switches, both working on programmed from 15 to 25 kHz frequency, and the high voltage transformer powering the four-stage multiplier with the additional capacity filter at output. The transformer and multiplier both is made in oil tank with silicon oil. The additional capacity filter provides low ripple and noise level in working range of output currents. A nominal output voltage of the source is 110 kV. The source can operate in normal mode with series of high-voltage breakdown in output voltage. In the high-voltage breakdown the released in load and matching circuit energy is less than 20 J at maximum operating voltage 120kV. The efficiency of system is more than 80% at the nominally output power 11 kW. The controller of the source is developed with DSP and PLM, which allows optimizing operations of the source. For control of the source serial CAN-interface is used. The description of the source and the test results are presented.

WEPPD033	The System for Control of an Electron Beam Welding Machines	620
	V.V. Repkov, E.A. Kuper, A.Yu. Protopopov, A.A. Zharikov BINP SB RAS, Novosibirsk, Russia
	The report examines the main problems that had to be overcome in developing the system for control of an electron beam welding machines. The electronics of the system is under potential of the accelerating voltage (60 kV), therefore it required solving the problem of power transmission and control signals. The volume of the device had to be minimized as the place to put the electronics was limited. The electronics must be resistant to high voltage breakdowns as when breakdowns there may be a voltage pulse of 60 kV with energy to 20 J in any of the cathode electrode unit. The power, necessary for the heater, can reach 250 W. To solve this task the stabilized power supply with an adustment range of 0-125 A (2.5 V) current was developed. The power needed for this power supply operating is transmitted via a special high frequency (25 kHz) transformer. The isolation voltage between the primary and secondary windings of the transformer is 100 kV. To control the current of the beam (welding current), a linear amplifier, which generates the voltage on the control grid in the range 0–4 kV, was developed. The amplifier bandwidth is 1 kHz. To control the current beam, current intensity, and to control the parameters of the gun, a specialized controller was developed. The connection of the controller with a computer is carried out with the help of optical links.

Paper

Title

Page

High-Voltage Source with Output Voltage up to 110 kV with Output Current up to 100 mA

506

I.A. Gusev, A.S. Medvedko, A.Yu. Protopopov, D.N. Pureskin, D.V. Senkov
BINP SB RAS, Novosibirsk, Russia

The presented report contains the description of high-voltage source with output voltage up to 110 kV and output current up to 100 A. The source consist of the chopper with IGBT switches working with a principle of pulse-width modulation and the full H-bridge converter with IGBT switches, both working on programmed from 15 to 25 kHz frequency, and the high voltage transformer powering the four-stage multiplier with the additional capacity filter at output. The transformer and multiplier both is made in oil tank with silicon oil. The additional capacity filter provides low ripple and noise level in working range of output currents. A nominal output voltage of the source is 110 kV. The source can operate in normal mode with series of high-voltage breakdown in output voltage. In the high-voltage breakdown the released in load and matching circuit energy is less than 20 J at maximum operating voltage 120kV. The efficiency of system is more than 80% at the nominally output power 11 kW. The controller of the source is developed with DSP and PLM, which allows optimizing operations of the source. For control of the source serial CAN-interface is used. The description of the source and the test results are presented.

WEPPD033

The System for Control of an Electron Beam Welding Machines

620

V.V. Repkov, E.A. Kuper, A.Yu. Protopopov, A.A. Zharikov
BINP SB RAS, Novosibirsk, Russia

The report examines the main problems that had to be overcome in developing the system for control of an electron beam welding machines. The electronics of the system is under potential of the accelerating voltage (60 kV), therefore it required solving the problem of power transmission and control signals. The volume of the device had to be minimized as the place to put the electronics was limited. The electronics must be resistant to high voltage breakdowns as when breakdowns there may be a voltage pulse of 60 kV with energy to 20 J in any of the cathode electrode unit. The power, necessary for the heater, can reach 250 W. To solve this task the stabilized power supply with an adustment range of 0-125 A (2.5 V) current was developed. The power needed for this power supply operating is transmitted via a special high frequency (25 kHz) transformer. The isolation voltage between the primary and secondary windings of the transformer is 100 kV. To control the current of the beam (welding current), a linear amplifier, which generates the voltage on the control grid in the range 0–4 kV, was developed. The amplifier bandwidth is 1 kHz. To control the current beam, current intensity, and to control the parameters of the gun, a specialized controller was developed. The connection of the controller with a computer is carried out with the help of optical links.