Inverter type X-ray apparatus
US4839915A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1988 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Jan 15, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an inverter type X-ray apparatus comprising an inverter including a plurality of switching elements operated alternately to generate an AC voltage having a rectangular waveform, a high voltage transformer transforming the AC voltage of rectangular waveform into a high AC voltage, a high voltage rectifier circuit rectifying the high AC voltage into a DC voltage, and an X-ray tube to which the DC voltage is applied as a tube voltage, the switching elements are driven to make chopping operation at a frequency high than the inverter drive frequency, and a pattern signal is generated for gradually increasing the duty cycle of the chopping operation in synchronism with the timing of switching over the switching elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.