Single-phase three-wire type transformer

Details Single-phase three-wire type transformer Single-phase three-wire type transformer

1999-04-08

2000-04-11

Mai, Anh

Inductor devices

Winding formed of plural coils

336184, 336186, H01F 2728

Patent

active

06049266&

ABSTRACT:
A single-phase three-wire type transformer which forms secondary coils by duplex coils winding two conductors in parallel according to the division intersection connection and can reduce currents circulating inside of a circuit of the transformer, thereby reducing the loss in the transformer. Coils A and B are formed in two opposing locations of a core (1). The coils A and B are configured so that two secondary coils and a primary coil are overlapped and wound in sequence from the inside of the core (1) in three layers, respectively. Each of the secondary coils provided by winding two conductors of small diameter in parallel condition on the core (1). One duplex coil connects the two parallel winding conductors in series with the other duplex coil, i.e. coils (211a) and (222b) are connected at a connection point (p), coils (212a) and (221b) at a connection point (q), coils (221a) and (212b) at a connection point (r), and coils (222a) and (211b) at a connection point (s), and the connection lines are intersected, whereby two closed circuits are formed in the secondary coils.

REFERENCES:
patent: 3579165 (1971-05-01), Johnson

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