Hi, I want to curve fit data i have and find a common equation. I have speed of ceiling fan for 12 capacitors at 4 different voltages. I need an equation where i can estimate the speed of fan by substituting capacitor and voltage values.

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sapthami
sapthami on 10 Apr 2014
Edited: Matt J on 5 May 2014
for example, this is my data of ceiling fan speed at 180V, 200V, 220V, 240V for 6 different capacitors. 0.682µF 1.229µF 1.67µF 1.962µF 2.11µF 2.188µF 180 44 48 50 54 57 57 200 55 60 61 64 67 69 220 66 70 71 77 78 80 240 79 80 82 86 81 91 I want an equation where i can substitute any capacitor value and voltage to get speed at that voltage of that particular capacitor. Please help me. Thanks.

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Answers (2)

Jerry konneh
Jerry konneh on 5 May 2014
Hi i guess u could watch this webinar. hope it helps
Matt J
Matt J on 5 May 2014
Edited: Matt J on 5 May 2014
Sounds more like an interpolation problem. Make a 2D table of speed versus voltage&capacitance and apply interp2().
Curve fitting applies to situations where you already know the form of the equation that the data obeys apart from some unknown coefficients or other parameters. It doesn't sound like you know that in this case.

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