To provide an electromagnetic apparatus which is less affected by a load current flowing through a three-phase main winding, formed into a three-phase integral structure, can be reduced in higher harmonics without using an insulating film, and made variable in reactance.
This three-phase electromagnetic apparatus is equipped with a three- phase electromagnetic circuit composed of three H-shaped legs 4a to 4c which form magnetic circuits and are each provided with paired ends and two frames 5a and 5b which connect the paired ends of the H-shaped legs 4a to 4c to form a closed magnetic circuit. Main windings 1aa to 1cb corresponding to the phases of a three- phase AC power supply are wound on the magnetic circuits on the side of the one connecting ends of the H-shaped legs 4a to 4c, and control windings 2aa to 2cb are wound on the magnetic circuits on the side of the other connecting ends of the H- shaped legs 4a to 4c. The main windings 1aa to 1cb are connected in series or parallel so as to enable main magnetic fluxes produced in the paired magnetic circuits to be oriented in the same direction and the control windings 2aa to 2cb are connected in series so as to enable voltages induced by main magnetic fluxes in the control windings to cancel each other, so that the main windings can be continuously changed in reactance by controlling the magnetic reluctance of a common magnetic circuit for main magnetic fluxes and control magnetic fluxes.
OHINATA TAKASHI
AKATSUKA SHIGEAKI
AOKI TOMOYUKI
KAWAKAMI MINEO
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