Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1990-07-02
1992-04-21
Sterrett, Jeffrey
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
336182, 363 40, 363131, H02M 3335
Patent
active
051074117
ABSTRACT:
An electric voltage generator comprises a transformer (1) having a ferromagnetic core (3), a primary winding (5) and a secondary winding (7). The primary winding (5) includes a first primary coil (31) wound in the form of a solenoid and the secondary winding (7) includes a first secondary coil (33) wound in the form of a solenoid. These coils (31, 33) have the same length, have the same number of turns of wire of the same diameter, and are concentrically disposed on the core (3) in the same axial position. Their winding sense and connection to a primary circuit (9) and a secondary circuit (19), respectively, are chosen so that correspondingly situated ends of these two coils carry alternating voltages of the same polarity in the operating condition. Consequently, correspondingly situated turns of the two coils carry the same alternating voltage and interference signals cannot be transferred via the parasitic capacitance (37) between the primary winding (5) and the secondary winding (7).
REFERENCES:
patent: 3617854 (1970-04-01), Cole
patent: 4089049 (1978-05-01), Suzuki et al.
patent: 4133025 (1979-01-01), Wurzburg
patent: 4280174 (1981-07-01), Sonda
patent: 4441146 (1984-04-01), Vinciarcelli
patent: 4455545 (1984-06-01), Shelly
patent: 4517472 (1985-05-01), Ruitberg et al.
patent: 4635179 (1987-01-01), Carsten
Franzblau Bernard
Sterrett Jeffrey
U.S. Philips Corporation
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