High voltage power supply for an X-ray tube

Details High voltage power supply for an X-ray tube High voltage power supply for an X-ray tube

1993-09-02

1995-03-21

Porta, David P.

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

378101, 378112, 363 97, 323280, H05G 134

Patent

active

054003857

ABSTRACT:
A supply for a high bias voltage in an X-ray imaging system has an inverter and a voltage multiplier that produce an alternating output voltage in response to control signals. A voltage sensor produces a signal indicating a magnitude of the output voltage. A circuit determines a difference between the sensor signal and a reference signal that specifies a desired magnitude for the output voltage and that difference is integrated to produce an error signal. The error signal preferably is summed with a precondition signal that is an approximation of a nominal value for the signal sum and the summation producing a resultant signal. Another summation device arithmetically combines the resultant signal and the sensor signal with a signal corresponding to a one-hundred percent duty cycle of the inverter operation in order to produce a duty cycle command. An inverter driver generates the inverter control signals that have frequencies defined by the resultant signal and have duty cycles defined by the duty cycle command. A unique state machine is described which generates those control signals.

REFERENCES:
patent: 4460949 (1984-07-01), Steigerwald
patent: 4477868 (1984-10-01), Steigerwald
patent: 4504895 (1985-03-01), Steigerwald
patent: 4541041 (1985-09-01), Park et al.
patent: 4703496 (1987-10-01), Meccariello et al.
patent: 5001735 (1991-03-01), Sammon

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