High voltage power supply for an X-ray tube
US5400385A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Sep 2, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/32
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.