DC/AC power inverter control unit of a resonant power converter circuit, in particular a DC/DC converter for use in a high-voltage generator circuitry of a modern computed tomography device or X-ray radiographic system
US8385504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Nov 19, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC/AC power inverter control unit of a resonant-type power converter circuit (400), in particular a DC/DC converter, for supplying an output power for use in a high-voltage generator circuitry of an X-ray radiographic imaging system, a 3D rotational angiography device, or X-ray computed tomography device, comprises an interphase transformer (406) connected in series to at least one series resonant tank circuit (403a and 403a′ or 403b and 403b′) at the output of two DC/AC power inverter stages (402a+b) supplying a multi-primary winding high-voltage transformer (404). The interphase transformer (406) removes a difference (ΔI) in resonant output currents and (I1 and I2) of the DC/AC power inverter stages (402a+b). In addition, a control method is disclosed which assures that the interphase transformer (406) is not saturated. Furthermore, the control method ensures zero current operation and provides for minimized input power losses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.