voltage compensation control with DAQ

[cleverboy]

I want to use DAQ to generate a Voltage Vo, and then amplify it with amplifer (times K) as a transformer primary side input Vs. There is a voltage drop delta V on the primary winding, and the secondary winding voltage output is V2. so the Delta V=Vs-NV2. I want to compensate this Delta V and keep V2 is always pure sine wave. so I build this VI, however, it seems this feedback compensation does not work. any one has some idea?

Thank you in advance.

 

[niNickC]

Hello,

I have just been thinking about this, just to make sure my maths is the same as yours, can you confirm that the N you mentioned below is equal to N(primary turns)/N(secondary turns)?

Also, when you say it doesn't work, what exactly do you mean? You get some output but it simply isn't compensated? Or you are getting completely erroneous values?

Anyway, assuming I have the above correct, I am still unsure how your program operates, what is the purpose of the constant '10' in the middle of your block diagram?

Sorry to ask so many questions!