VORRICHTUNG ZUR STROMREGELUNG IN EINER INDUKTANZSPULE.

摘要

A device for accurately controlling the current application to an inductance coil without any time lag. Connected to the terminal of an inductance coil (1) on the negative electrode side of a power supply is a semiconductor switching device such as a transistor (3), and thereby, a chopper circuit for supplying an exciting current proportional to a reference voltage is formed. By the magnetic energy when the current application to the inductance coil (1) is cut off, a capacitor (5) of a small capacitance is charged. Thereby the voltage is raised and the falling of the exciting current is made rapid. On starting the current application, the rise of the exciting current is made rapid by virtue of the high voltage of the capacitor (5). Therefore, the exciting current is precisely proportional to the reference voltage.