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SIMULAÇÕES EM ENGENHARIA ELÉTRICA

 

 

 

 

 

 

 

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BODE PLOT FOR FIRST AND SECOND ORDER SYSTEMS

RL CIRCUIT

Consider the RL circuit of the figure below:


This circuit may be used as a first order filter. If the output is the voltage in the inductor, then the circuit is a high-pass (HP) filter. In case the output is the voltage in the resistor, the filter is low-pass (LP).

When the output is in the inductor (HP) the transfer function is:

H(s)_{PA} = \frac{s}{s + \frac{R}{L}}

a) Analyze the Bode Plot of this high-pass filter for different values of R and/or L.

R =   L =

Frequency from to Hz



When the output is in the resistor (LP) the transfer function is:
H(s)_{PB} = \frac{\frac{R}{L}}{s + \frac{R}{L}}


b) Analyze the Bode Plot of this low-pass filter for different values of R and/or L.

R =   L =

Frequency from to Hz



A very interesting experiment is to compute both diagrams (LP and HP) for the same values of the parameters and compare results.

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