In a previously published article, an option was presented to calculate the frequency of an electrical signal from a transition through zero. This article provides an example implementation of a frequency filter.
In fig. 1 shows a model of an electric signal frequency filter implemented in Simulink. The implementation of this filter is given in the attached file calc_freq.mdl. The instantaneous value of the electrical signal is applied to the input of the frequency filter model.
Fig. 1 Implementing a zero-pass frequency filter in Simulink
Test the resulting filter. For this we will use the circuit shown in Fig. 2.
Fig. 2 Scheme for checking the operation of the frequency filter
At the first moment, a signal with a frequency of 50 Hz is supplied to the input of the frequency filter, from a moment in time t = 0.4 s a signal with a frequency of 48 Hz is supplied.
In fig. 3 shows the result of the frequency filter.
Fig. 3 The initial signal and the result of calculating the frequency of this signal
So, we simulated and tested the frequency filter.
If you like our content, help to develop the site.