Planar transformer

Details Planar transformer Planar transformer

1994-03-14

1995-07-04

Picard, Leo P.

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

336232, H01F 500

Patent

active

054304245

ABSTRACT:
Disclosed is a planar transformer comprising a planar primary spiral coil and a planar secondary spiral coil, which are mutually insulated and laminated, wherein, (1) when the winding width W.sub.1 of the primary spiral coil and the winding width W.sub.2 of the secondary spiral coil have the relationship of W.sub.1 .ltoreq.W.sub.2, the inner size A.sub.i1 of the primary spiral coil and the inner size A.sub.i2 of the secondary spiral coil coincide with each other, and (2) when the winding width W.sub.1 of the primary spiral coil and the winding width W.sub.2 of the secondary spiral coil have the relationship of W.sub.1 >W.sub.2, the central axes of the primary and secondary spiral coils coincide with each other, the outer size A.sub.o2 of the secondary spiral coil is equal to or smaller than the outer size A.sub.o1 of the primary spiral coil, and the secondary spiral coil is arranged corresponding to a position at which magnetic flux generated by a current flowing through the primary spiral coil is largest.

REFERENCES:
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Patent Abstracts of Japan vol. 10, No. 244 (E 430) 22 Aug. 1986 & JP-A-61 075-510, Apr. 7, 1986 M Sudo "Small Sized Transformer".
Patent Abstracts of Japan vol. 12 No. 80 (E590) (2927) 12 Mar. 1988 & JP-A-62 219605, Sep. 26, 1987 T. Matsumoto et al. "High Frequency Transformer".
Patent Abstracts of Japan vol. 12 No. 80 (E590) (2927) 12 Mar. 1988. & JP-A-62 219606, Sep. 26, 1987 T. Matsumoto et al., "High Frequency and High Voltage Transformers".
National Convention Record IEE Japan, No. 18-5-5, T. Taniuchi et al.; Mar. 1990 T.S., Nov. 15, 1991 T.M. Mar. 15, 1991 S.18-31 S.18-34.
Technical Report of IEE Japan, No. MAG-91-62, K. Yamaguchi et al. Feb. 8, 1991 pp. 101-110.

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