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Why does an alternator output voltage gets higher when it is connected to capacitive load than it was with a inductive or resistive load?

I understand that when a capacitive load is connected it improves the power factor. But how does power factor increases output voltage?

Is there any resonance effect when a capacitive load is connected? And if so how does that affect the output voltage?

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The equivalent circuit of an alternator consists of the an ideal AC voltage generator in series with a "source impedance" which can be modelled by a resistor in series with an inductor. When this impedance is shunted with a capacitor, then, for a certain range of values of the R, L, and C components, a "resonant rise" in the voltage across the inductor will occur, with the result that the overall output voltage is increased.

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  • \$\begingroup\$ You mean RLC series resonance ? Can you draw a schematic or so ? \$\endgroup\$ – Mitu Raj Dec 15 '17 at 13:11

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