Patent ID: 6101113
Filing Date: 2000-08-08
Classification: H01F

Abstract:
A multiple AC/DC converter system comprising a 3-phase wye connected auto transformer having four windings on each of 3 phases with two windings being connected in series to provide a tapped coil with one section of the coil being connected to form a neutral with the same coils from the other phases; with the tapping point being connected to one of the three power source lines; with the same connections on the other phases such that each of the lines of the three-phase source are connected to the tapping point on each transformer phase; with one winding from another phase being connected to the end of the tapping furthermost from the neutral point; with the remaining winding on the remaining phase also being connected to the end of the tapping furthermost from the neutral point; with the longer part of the tapped coil being called a LONG winding; with the shorter part of the tapped coil being called a TEASER winding; with the 2 remaining coils connected to the end of the TEASER winding remote from the tapping being called ZIG windings; with the proportionality of the turns comprising the LONG, TEASER, and ZIG windings being selected so as to achieve output voltages remote from the junction of the 2 ZIG coils which meet design requirements concerning amplitude and phase angle relative to the supply voltage; with such design requirements including amplitudes generally equal to that of the three-phase supply voltage and with phase angles of generally .+-.15.degree. with respect to the supply voltage; wherein 6 output voltages of predetermined amplitude and phase are available.