Contactless power transfer system for a rotational load
US5608771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Oct 23, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F38/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Power is transferred from a stationary power supply to a rotational gantry in a computer tomography (CT) system through a rotary transformer arranged in a ring configuration with an inner diameter that is sufficiently large to receive a patient. The rotary transformer has a toroidal rotor core and a toroidal stator core arranged either concentrically with an air gap extending radially therebetween or side-by-side with an air gap extending axially therebetween. A resonant inverter provides ac power to the rotary transformer which, in turn, drives a high-voltage tank circuit coupled to a x-ray tube, the tank circuit and x-ray tube being mounted on a rotational gantry. Advantageously, this is a contactless power transfer system which eliminates conventional brush and slip ring arrangements and moreover avoids the need for mounting the inverter to rotate with the CT gantry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.