Ferroresonant AVRs

Ferroresonant

— the idea of ferroresonance AVRs is to use a pair of coils on the same core. In this case, the output coil is in the so-called saturated state, and the excess of the magnetic flux through it (due to an increase in the voltage at the input coil) does not lead to an increase in the output voltage — the “extra” flux is dissipated through a magnetic shunt or simply in the air. The advantages of ferroresonance models are low cost, instant response, and good accuracy. At the same time, this type of stabilizers has a number of serious disadvantages. Of the most critical, one can name a highly distorted sinusoid of the output voltage, which makes it difficult to connect a sensitive load, as well as the inability to work at too low or too high power.