High-frequency response and ns-range pulse response of iron-based amorphous cores

In order to get important characteristic parameters of three kinds of domestic amorphous cores under the conditions of high frequency and fast pulses, frequency response and fast-pulse response of these cores are analyzed in detail in this paper. In the test circuit of a 1∶1 transformer, attenuation ratio of the response voltage increased from 0 to 50%~60% when the frequency of the sinusoidal source voltage increased from 1 MHz to 20 MHz. According to theoretical analysis, high-frequency eddy loss caused this voltage attenuation. Fast-pulse response of amorphous cores were also studied, and experimental results showed that these cores responded inferiorly to the amplitude and flat top of the square pulse when the pulse width was less than 30 ns. However, response signal and source signal