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omkar_991
Associate

Join Date: Jun 2007
Posts: 25

Sinusoidal voltage source

06/15/2007 2:35 PM

Assume a non-linear load connected to a voltage source delivering a pure sine voltage wave. Because of the non-linearity of the load, it will draw a non-sinusoidal current. This current will contain harmonics. Then is it really possible for the supply voltage to remain purely sinusoidal, since application of the ohm's law(or lenz's law for inductive load) for each harmonic current and superposition together will not give you a voltage equation that will finally add up to produce a pure sine wave?
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user-deleted-1105
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Popular Science - Weaponology - New Member United Kingdom - Member - New Member

Join Date: May 2007
Location: Harlow England
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Good Answers: 670
#1

Re: Sinusoidal voltage source

06/15/2007 3:13 PM

It depends on the impedance of the source and the load.

Or to put it another way a non linear but very light load won't make much difference to a decent low impedance source.

But a heavy non linear load will distort a voltage source (especially if it's relatively high impedance).....

Play with an audio signal generator and some zenner diodes!

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Snakers
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Join Date: Apr 2007
Posts: 178
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#2
In reply to #1

Re: Sinusoidal voltage source

06/16/2007 4:54 PM

But a heavy non linear load will distort a voltage source (especially if it's relatively high impedance).....

Dont you mean Low Impedance

Snakers
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user-deleted-1105
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Popular Science - Weaponology - New Member United Kingdom - Member - New Member

Join Date: May 2007
Location: Harlow England
Posts: 16512
Good Answers: 670
#3
In reply to #2

Re: Sinusoidal voltage source

06/16/2007 5:27 PM

"But a heavy non linear load will distort a voltage source (especially if it's relatively high impedance)....."

it's... refers to the subject of the sentence which in this case is the voltage source, (indeed the voltage source is the subject of the entire thread).

The 'heavy' load would be by implication low impedance.

Hope this clarifies the matter.

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