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  1. GHELZER

    torque available from VFD controlled motors as function of speed

    How big must a VFD controlled electric motor be to deliver a specified horsepower at a reduced speed. If the driven equipment requires a torque of 4000 foot-pounds at 1200 RPM, then its required horsepower input is 914 HP. If the equipment is driven by a 50 Hz electric motor with a nominal...
  2. GHELZER

    SPEED OF ELASTIC RECOVERY

    How is the speed of recovery from an elastic deformation defined and measured/quantified?

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