Formulae for Rotating Machines

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R

Regulation %

$R e g percent sign equals fraction numerator N subscript s y n c end subscript minus N space over denominator N subscript s y n c end subscript end fraction cross times 100$

$V subscript r e g end subscript percent sign equals fraction numerator open parentheses V subscript N L end subscript minus V subscript F L end subscript close parentheses over denominator V subscript F L end subscript end fraction cross times 100$

$V subscript r e g end subscript percent sign equals fraction numerator left parenthesis V subscript N L end subscript minus V subscript F L end subscript right parenthesis over denominator V subscript N L end subscript end fraction cross times 100$

I know what your thinking. WHICH ONE IS IT. The answer is that it depends. Some manufacturers use different numbers to make their machines look better. Your guess is as good as mine. Not very helpful I know but it shouldn't matter that much.

Rotor frequency

$f subscript r equals fraction numerator S l i p percent sign cross times f subscript s u p p l y end subscript over denominator 100 end fraction$

The rotor frequency is equal to the supply frequency times the slip percentage divided by 100