| US 7,362,206 B1 | ||
| Variable transformer | ||
| Edward Herbert, 1 Dyer Cemetery Rd., Canton, Conn. 06019-2029 (US) | ||
| Filed on Jun. 14, 2006, as Appl. No. 11/423,957. | ||
| Application 11/423957 is a continuation in part of application No. 10/904371, filed on Nov. 06, 2004, granted, now 7,119,648. | ||
| Application 10/904371 is a continuation in part of application No. 10/709484, filed on May 08, 2004, granted, now 6,979,982, filed on Dec. 27, 2005. | ||
| Application 10/709484 is a continuation in part of application No. 10/708846, filed on Mar. 27, 2004, granted, now 7,023,317. | ||
| Application 10/709484 is a continuation in part of application No. 11/423957. | ||
| Application 11/423957 is a continuation in part of application No. 11/163308, filed on Oct. 13, 2005. | ||
| Claims priority of provisional application 60/593110, filed on Dec. 10, 2004. | ||
| Claims priority of provisional application 60/479706, filed on Jun. 19, 2003. | ||
| Claims priority of provisional application 60/473075, filed on May 23, 2003. | ||
| Claims priority of provisional application 60/460333, filed on Apr. 03, 2003. | ||
| Int. Cl. H01F 27/28 (2006.01) | ||
| U.S. Cl. 336—220 | 15 Claims |
| 1. A variable transformer having a variable effective turns ratio comprising
a high frequency matrix transformer comprising a plurality of transformer modules,
each of the plurality of transformer modules having a respective transformer module primary winding,
the high frequency matrix transformer having a matrix transformer primary winding comprising all of respective transformer
module primary windings connected in series,
each one of the plurality of transformer modules having a respective secondary winding having at least a respective start
termination and a respective end termination,
each one of the plurality of transformer modules having, respectively, a respective full-wave rectifier connected to the at
least a respective start termination and a respective end termination of the respective secondary winding of the respective
each one of the plurality of transformer modules,
each of the respective full-wave rectifiers having a respective output termination,
all of respective output terminations of the respective full wave rectifiers being connected in parallel as an output of the
variable transformer,
at least one of the plurality of transformer modules having an ac switch connected between the at least a respective start
termination and the respective end termination to short-circuit the respective secondary winding of at least one of the plurality
of transformer modules, and
a controller for tuning on and off the ac switch and for turning off and on the respective full wave rectifiers of the at
least one of the plurality of transformer modules so as to vary the effective turns ratio of the variable transformer.
|