Voltage Tunable Mn-Zn Ring Core with Large Inductance Tunability

摘要

Influence of a DC electric field to inductance of a ring core inductor is analyzed. The inductor is made of a commercial MnZn ferrite core with wounds of litz copper wire. A DC Electric field is applied by connecting metalized surfaces of the core to a DC voltage source. Inductance of commercial ring core inductor is measured in the frequency range from 10kHz to 4 MHz. Applying the electric field of 6 kV/m, depending on direction of applied field, the inductor exhibited a large inductance tunability of 52% in a wide frequency range.