Variable voltage switched current control
US5262692A · kind A · utility
12Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1992 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Apr 13, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C32/0457
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Provision of a digital controller in which the controller controls the bearing coil current by means of a switching bridge that periodically reverses the applied voltage to the coil. The controller selects an applied voltage from a plurality of discrete voltage sources. When a rapid change in the load current is required, a relatively large magnitude of applied voltage is used. When a relatively constant magnitude of average load current is required, a relatively smaller value of voltage is applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.