the winding circle number measuring instrument composed of 555

Published:2011/9/9 9:08:00 Author:Ariel Wang | Keyword: winding, circle number, measuring instrument | From:SeekIC

The measurement of the winding adopts the principle of magnetic pressure comparison .When the alternating current I goes to the winding which is to be measured and the standard winding Ws,the total magnetic motive force is:Vm=(Ws-Wx)i as two windings are series opposing .If Ws=Wx,then Vm=0.You can estimate the winding number to be measured by the standard winding number known.PSG is the multivibrator type oscillator composed of R1,R2,W1 and C1.The oscillation frequency is f=1.44/(R1+2R2+2Rw1)C1.The frequency range of parameter in the chart is 40～70Hz.You can adjust the oscillation frequency of potentiometer W1 to 50Hz. The drive stage is the class A push pull stage of power amplifier composed of BG2,BG3 and B1.



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