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Hi,
I measured the impedance(and so the capacitance) and it is varying,But
-It is varying for transformer to transformer and also the Base capacitance is Varying(i.e. Capacitance with no short).
-If the length of Bus on Secondary side is considerable no considerable difference was observed(As...
Thank You For Replying...
- So from b) and c) we can say the finite value of CMR is due to Asymmetry of Transformer as a whole i.e. due to Leakage Inductance, InterWinding Capacitance...
- So in CMR Calculation 'eo' = max('eo C' , 'eo R' ) where 'eo C' = Voltage on C when R is Grounded and...
Above Figure Shows Standard Test Circuit to Test CMR of Transformer...
a) 'eCM'=Sine Wave,Is 'eo' also Sine Wave
b) If 'C' were grounded instead fo 'R';does 'eo' remain same?
c) Is CMR due to Asymmetry of Inter-winding Capacitance of Transformer.
Below Shows IEEE standardized equivalent...
The Goal is to Find SHIELD short and if Shorted to which Point :Point A or Point B
Since it is a Practical Question You can Assume parasitic Capacitances,Resistances(of Practical Values) But the Circuit is Symmetrical One as chuckey Points out
Actually Bus Starts after Point A/B where a line is Marked(After which shield can get shorted) ,it is a Balanced Transmission Line with Load attached at other end and can be of any length(0 to 3λ)...
The Problem is a Practical One And one needs to Find Short of Shield on Secondary Side(Because then the bus becomes Suceptible to EMI with a Shield Shorted to a Conducting Wire) from Primary Side...:roll:
Hi Thanks for the Reply ,The Problem here is not to find Impedance Reflected on Primary Side but to Find whether Shield is Shorted at Point A or B of Secondary Coil,Thats the Tricky Part...
Hi FvM The Transformer Winding Ratio Lp:Ls is 1:1 (Isolation Transformer) and is an ideal one so negligible inter-winding capacitance.We are here trying to find a Mathematical Solution to Problem instead of Practical Values...
Also Primary Side Winding is an unbalanced one i.e. one side is Grounded
What I fail to understand is how to find if SHIELD is shorted to Point A or Point B Without Access to Secondary Transformer Coil...
We Have Access to Primary Winding,Shield and are provided with Signal Generator
hi man I hope you might be in a frustrated state...:???:
Initially Hardware interfacing of I2C protocol with DS1307 was difficult for me also
Check
That you have put in battery for DS1307 you need it.
Try running I2C at lower frequency(around 1 Hz) so that you can check it is working correctly...
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