초록 ▼

The invention provides for an autotransformer for converting three-phase AC power to nine-phase AC power. The autotransformer includes three coils each having a plurality of serial windings and a plurality of stub windings. The serial windings form a delta and the stub windings are magnetically coup

The invention provides for an autotransformer for converting three-phase AC power to nine-phase AC power. The autotransformer includes three coils each having a plurality of serial windings and a plurality of stub windings. The serial windings form a delta and the stub windings are magnetically coupled with the serial windings from the same coil. Three terminals are provided at the apices of the delta and the three-phase AC source may be directly connected to the respective apex terminals. A plurality of direct outputs are interposed between respective serial windings and a plurality of indirect outputs are electrically connected with the second ends of the stub windings. The voltage magnitude of each of the direct outputs is preferably equal to the voltage magnitude of each of the indirect outputs. The voltages of the direct outputs and indirect outputs are out of phase with the voltages at the apex terminals.

대표청구항 ▼

An autotransformer for converting three-phase AC power to nine-phase AC power, comprising: a. three coils each having a plurality of serial windings and a plurality of stub windings; b. said serial windings forming a delta; c. said stub windings each being magnetically coupled with corresponding one

An autotransformer for converting three-phase AC power to nine-phase AC power, comprising: a. three coils each having a plurality of serial windings and a plurality of stub windings; b. said serial windings forming a delta; c. said stub windings each being magnetically coupled with corresponding ones of said serial windings and each being electrically connected at a first end thereof with other respective ones of said serial windings; d. three terminals connected to respective apices of said delta for connecting to a three-phase AC source; e. a plurality of direct outputs each being directly tapped into one of said coils intermediate respective ones of said serial windings within said coil; and f. a plurality of indirect outputs each being electrically connected with a second end of a respective one of said stub windings.