High voltage pulsed power supply with time limiting nonlinear fe

Details High voltage pulsed power supply with time limiting nonlinear fe High voltage pulsed power supply with time limiting nonlinear fe

1984-10-01

1986-09-30

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 49, 378106, 378110, 378112, H02M 3315

Patent

active

046149996

ABSTRACT:
An apparatus for supplying high voltage pulsed direct current to an X-ray tube includes a transformer, a high frequency inverter circuit and a nonlinear feedback loop. The invention uses the high frequency inverter connected in series with a DC power supply source and the primary winding of the transformer in order to generate high voltage, high frequency AC in the secondary winding. A rectifier connected to the secondary winding supplies high voltage pulsed DC to the X-ray tube. A detector, such as a voltage divider, detects the voltage supplied to the X-ray tube and supplies a representation of it to a nonlinear feedback circuit connected between the detector and the high frequency inverter. The inverter circuit includes at least one switch generated by electrical pulses. The nonlinear feedback circuit controls the duty cycle of the inverter during only a portion of the output voltage range of the high voltage pulsed power supply, preferably only after the output voltage reaches 90% of the rated high voltage to be supplied to the X-ray tube.

REFERENCES:
patent: 4301398 (1981-11-01), Johnson
patent: 4477868 (1984-10-01), Steigerwald
patent: 4504895 (1985-03-01), Steigerwald

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