LINEAR VARIABLE REACTOR

WIPO Patent Application WO/1999/031685

A1

A linear variable reactor which enables wide-range control and has its harmonic distortion reduced. A main winding (12) is wound around a first U-shaped cut core (11). A control winding (14) is wound around a second U-shaped cut core (13). These first and second U-shaped cut cores (11, 13) are in contact with each other, with cut surfaces thereof facing each other and with the second U-shaped cut core (13) rotated by 90° in a torsional direction with respect to the first U-shaped cut core (11). Four surfaces of the contact part form a common magnetic circuit of the first and the second U-shaped cut cores (11, 13). A part of the common magnetic circuit is cut off, thus forming a wedge-shaped gap (15). As the wedge-shaped gap (15) is formed in the common magnetic circuit, the common magnetic path becomes parallel magnetic paths of the contact part (16) of the first and the second U-shaped cut cores (11, 13) and the wedge-shaped gap (15). By changing the excitation current of the control winding (14), the inductance of the main winding (12) may be made linear.

MITAMURA KOICHI (JP)
MAEDA MITSURU (JP)
SAKAMOTO MASAAKI (JP)

PCT/JP1997/004658

June 24, 1999

December 17, 1997

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TOHOKU ELECTRIC POWER CO (JP)
MITAMURA KOICHI (JP)
MAEDA MITSURU (JP)
SAKAMOTO MASAAKI (JP)

H01F3/10; H01F29/14; (IPC1-7): H01F29/14

JPS5564474A	1980-05-15
JPH09129450A	1997-05-16
JPS5184320U	1976-07-06
JPH07335456A	1995-12-22
JPS5461665A	1979-05-18
JPS55138215A	1980-10-28

Takano, Akichika (9th floor 72, Yoshida-cho, Naka-k, Yokohama-shi Kanagawa 231, JP)

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