Continuously adjustable inductance e.g. for fine tuning of resonant circuits, is formed between connection terminals of main winding, and second legs of O-shaped cores are each enclosed by short circuit winding

摘要

The device has two O-shaped cores in the main circuit with a main winding (10,11) on the first legs (3,4), a common auxiliary winding (12) on the second legs (5,6) and an air gap (9) between the second legs. The auxiliary winding is supplied with a direct current of definable amplitude and the inductance is formed between the connection terminals of the main winding. The second legs are each enclosed by a short circuit winding (13,14).