Device to control the speed of two-phase or three-phase motors
US5105141A · kind A · utility
13Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Jul 12, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/66
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed are a device and a method to control the speed of two-phase or three-phase A.C. motors by means of a three-phase converter. The switching-over instants of the switches of the converter for the control of a two-phase motor are computed so that the signals at the common points of each pair of switches are phase shifted with respect to one another and have no low-order harmonic components. The disclosed device and method are applicable to motors driving rotating anodes for X-ray tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.