Theoretical determination of a mathematical model to describe a polarized relay requires knowledge of the relay characteristics, i.e. the inductance, resistance and armature dynamics. Unless the data are supplied by the manufacturer determination of the characteristics is time-consuming and may present problems, especially if the inductance is required at low frequencies.
A technique is presented here which overcomes measurement difficulties at low frequency and allows an approximate model to be rapidly determined.
BurrowsC. R.‘Effect of position on the stability of pneumatic servomechanisms’, Jl mech. Engng Sci.196911, (No. 6), 615.
3.
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