US PATENT SUBCLASS 363 / 9
.~ Combined phase and frequency conversion (i.e., Ph1f1-Ph2f2)

Current as of: June, 1999
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363 /   HD   ELECTRIC POWER CONVERSION SYSTEMS

1  DF  CASCADED OR COMBINED, DIVERSE CONVERSIONS IN WHICH THE FREQUENCY OR PHASE OR COMBINED CONVERSION IS WITHOUT INTERMEDIATE CONVERSION TO D.C. {3}
9.~ Combined phase and frequency conversion (i.e., Ph1f1-Ph2f2) {3}
10  DF  .~.~> By semiconductor device converter
11  DF  .~.~> By electron tube converter
12  DF  .~.~> By saturable reactor converter

DEFINITION

Classification: 363/9

Combined phase and frequency conversion (i.e., Ph1f1-Ph2f2):

(under subclass 1) Subject matter wherein the system includes phase and frequency conversion.

(1) Note. See the class definition Glossary, for definitions of phase conversion and frequency conversion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

148+, for phase conversion systems.

157+, for frequency conversion systems.