UDC 621.316.722.1
HIGH-VOLTAGE POWER SUPPLY FOR MICROFOCUS X-RAY TUBE OF MEDIUM POWER
D. A. Morozov, Ph.D., associate professor RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
B. A. Polonsky, Ph.D., head of laboratory RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
A. Yu. Kuzmich, graduate student RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
E. Yu. Grachev, Ph.D., associate professor RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
A. A. Trubitsyn, Ph.D., full professor RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
The work is devoted to the development of a high-voltage power supply unit for a microfocus X-ray tube that includes a negative high voltage source of 80 kV and a cathode emission stabilizer for a tube up to 3 mA (240 watts). To increase the efficiency of sources and reduce mass-dimension indicators, the sources are built on the basis of resonant power converters providing switching of power switches at zero current or zero voltage. The aim of the work is to develop and simulate the circuit of a high-voltage resonant converter using the original method of controlling output voltage by changing the supply voltage of power stage of resonant converter. Using the scheme of modern silicone compound Silagerm-2106 for highvoltage insulation elements allowed to further reduce the dimensions of circuit and to place it in a typical telecommunications unit.
Key words: X-ray tube, high-voltage power supply, resonant converter, voltage multiplier, half-bridge driver, power MOS-keys, PWM controller, stabilizer of emission current.