| 摘要 |
PURPOSE:To eliminate the failure in long-term use with a simple structure by oscillating or rotating an agitator magnetized by the action of a magnetic flux whose direction is changed alternately by an alternating current. CONSTITUTION:The electromagnets 3 wound with coils 2, a magnetized agitator 4 for agitating a liquid, etc., and a supporting member 6 which is provided at a position midway between the poles of the electromagnets 3 and is used for holding the agitator 4 between magnetic poles 5 and 5' of the electromagnets 3 by attracting the agitator 4 are provided. In an alternating current generating circuit 12, the direction of a magnetic flux 11 of the electromagnets 3 is alternately changed by supplying an alternating current to the electromagnets 3 through the connection to the coils 2. The agitator 4 is alternately attracted and repelled by said magnetic flux, and the agitator 4 is oscillated or rotated. One side of an electric power source 7 is connected to the coils 2 in the alternating current generating circuit, and two diodes 8 and 8' and two thyristors 9 and 9' are connected between the other side of the electric power source 7 and the coils 2. In addition an oscillating circuit 10 is connected between the gates of two thyristors. |
