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  1. geo168

    Estimating Motor I & V under VFD operation

    You can estimete HP of the load, providing its a fan or pump, by using the speed ^3 law. Equation used for speeds below 100% Hp = k * speed^3 (centrifugal pump) Hp = 100% = 1 Speed = 100% = 1 1 = k * 1^3 K = 1/1^3 = 1 50hz/60hz=.833, hp = .833^3=57.8%, 57.8%hp at 50hz. 40hz/60hz=.666, hp =...

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