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brindha1688
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Join Date: Sep 2015
Posts: 1

Transfer Function of Voltage Controller

09/19/2015 2:28 AM

recently when i went through a research paper--in analysis of non linear dynamics in inverters--the system has a LC filter and operates in voltage mode of control..they have mentioned that they have used the dominant pole controller and have given its transfer function as

H(s)=k/1+s*tau where k is dc filter gain and tau=1/crossover frequency..

how to obtain this transfer function??please help..i have attached the circuit
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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
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#1

Re: Transfer Function of Voltage Controller

09/19/2015 11:29 AM

http://www.allaboutcircuits.com/textbook/alternating-current/chpt-8/resonant-filters/

http://circuitcalculator.com/lcfilter.htm

http://www.cds.caltech.edu/~murray/books/AM05/pdf/am06-xferfcns_16Sep06.pdf

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67model
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Join Date: Dec 2010
Posts: 1686
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#2

Re: Transfer Function of Voltage Controller

09/20/2015 8:57 AM

It is a "simple lag". A series resistor R followed by a shunt capacitor C is the simplest implementation - transfer function 1/(1+ RCs). R in ohms x C in Farads gives RC in seconds.
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