The simple coil turn number measuring instrument circuit

Published:2011/6/5 23:47:00 Author:Seven | Keyword: coil turn number, measuring instrument | From:SeekIC

The measuring of the coil is used with magnet voltage comparing principle , i.e the coil Wx under test and the standard coil Ws are got through with a AC current I, if the two coils are connected in reversed-phase series, the total magnetomotive of them is Vm=(Ws-Wx)i. If Ws=Wx, then Vm=0, so the turn number of coil under test can be calculated by that of the standard coil. The pulse signal generator is a multi-resonate oscillator which consists of IC(555), R1, R2, W1 and CI, and its oscillating frequency is f=1.44/(R1+2R2+2Rw1)C1, the frequency of the parameter in the figure is 40～70Hz. Adjust the potentiometer W1 and make the oscillating frequency at 50z.



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