Direct current compensation circuit for transformers
US4064449A · kind A · utility
9Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1976 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Aug 13, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/003
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A direct current compensation circuit is provided for use with a transformer having a plurality of windings. A resistor is connected in series with a first winding. A transistor is coupled to the first resistor and to a compensation winding so that when the direct current flow through the resistor is greater than a predetermined value, a compensation current is supplied to the compensation winding. When the direct current flow through the resistor is less than the predetermined value, no compensation current is supplied to the compensation winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.