| 摘要 |
PROBLEM TO BE SOLVED: To provide a current-device which is compact in light weight, capable of generating a constant current in a wide range regardless of DC/AC and reducing the cost of operation. SOLUTION: A rectifier inputting AC voltage of power frequency to output DC voltage, a high-frequency inverter high frequency switching a route of a current flowing by the output DC voltage to output an AC voltage, and an over-saturated reactor type magnetic amplifier, having an AC winding and a DC winding coupled magnetically to the AC winding to insert the AC winding as a route of a current flowing by the AC voltage output by the high-frequency inverter, are provided. An output is an AC current flowing in the AC winding of the over-saturated reactor magnetic amplifier; the AC voltage of power frequency is rectified once by high frequency switching it, high-frequency voltage is obtained. By allowing a current by this voltage to flow in the AC winding of the over saturated reactor magnetic amplifier, the current output of high accuracy and high stability is obtained, even with respect to an instantaneous change of a power source. |
