Software package to plot SMPS Bode plots
Software package to plot SMPS Bode plots
(OP)
Hello
I am working on stability of SMPS's.
I am currently getting the Bode plots of the SMPS transfer function in a very time consuming way by manipulating the complex numbers "by hand" in Excel.
This is prone to typing errors.
I would like to find a cheap mathematical software package, which will allow me to input the expression for the transfer function (a quotient containing complex numbers) and get the bode plots shown on the screen.
That is, input something such as............
A = [(1+j2f) (5.3-j)] / [ (6.2+j 2f) (4.2-j) j ]
And get a graph of.........
20 * log (magnitude of A) versus LOG("f")
And a graph of............
(Phase of A) versus LOG ("f")
------------------------------------------------
Does any reader know of a (cheap) package that will do this?
I am working on stability of SMPS's.
I am currently getting the Bode plots of the SMPS transfer function in a very time consuming way by manipulating the complex numbers "by hand" in Excel.
This is prone to typing errors.
I would like to find a cheap mathematical software package, which will allow me to input the expression for the transfer function (a quotient containing complex numbers) and get the bode plots shown on the screen.
That is, input something such as............
A = [(1+j2f) (5.3-j)] / [ (6.2+j 2f) (4.2-j) j ]
And get a graph of.........
20 * log (magnitude of A) versus LOG("f")
And a graph of............
(Phase of A) versus LOG ("f")
------------------------------------------------
Does any reader know of a (cheap) package that will do this?





RE: Software package to plot SMPS Bode plots
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Software package to plot SMPS Bode plots
Either of these tools will easilly provide you with a bode plot of your system. You can simply define the transfer function and tell it to plot. You can input the terms as a combined equation, as a numerator/denominator, as a polynomial, or as poles and zeros as you shown in your post.
If you want to simulate an electrical circuit, then take a look at LtSpice.
RE: Software package to plot SMPS Bode plots
RE: Software package to plot SMPS Bode plots
Googling Bode Nyquist Excel yielded http://www.chem.mtu.edu/~tbco/cm416/freqexcel.html. Any use?
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If we learn from our mistakes I'm getting a great education!
RE: Software package to plot SMPS Bode plots
Regards,