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hey does anyone know the effiency and power factor of a typical three phase induction motor?

cheers,

cheers,

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- Thread starter Aaron321
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- #1

- 5

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hey does anyone know the effiency and power factor of a typical three phase induction motor?

cheers,

cheers,

Last edited:

- #2

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Let [tex]\eta[/tex] be the efficiency, then [tex]\eta = \frac{P_{out}}{P_{in}}[/tex]

Let P= power, then P=VI.

Therefore the average Power = [tex]VIcos(\theta) [/tex]

By definition of power factor, it is the ratio of average power/VI.

Thus, the definition of power factor = [tex]\frac{VIcos(\theta)}{VI}=cos(\theta)[/tex]

From here, use the Pythagorean theorem to solve for power factor of a three phase

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