Biphase quadrature drive for an x-ray tube rotor
US4829551A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Jan 13, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/66
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An x-ray tube (10) imaging system, such as a computed tomography scanner, includes a cathode (40) for generating a stream of electrons. A rotating anode (42) is placed in a path of the electron stream and generates x-rays as a result of collisions therewith. An induction rotor (44) causes rotation of the anode as a result of electromagnetic interaction with a stator (48) comprised of two windings: a run winding (50) and a phase winding (52). The run winding and the phase winding are connected to three nodes (54, 58, 60), one of which is common to both. The three nodes are actively driven with run, common, and phase signals, respectively. Actively driving the three nodes increases bus drive voltage over 40% over that achieved by half-bridge drives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.