Slowing down the fan saves the unneeded air flow and saves the horsepower of the fan, which saves money. The device that controls the fan speed is called a variable speed drive. Variable frequency ...

Hydrostatic drives are widely recognized as an excellent means of power transmission when variable output speed is required ... motors -- particularly higher flow and pressure ratings in a ...

It also proves the effectiveness of variable-speed drive (VSD) technology at optimizing chiller energy ... by 9% while the chiller using a CSD uses its inlet guide vanes to throttle the refrigerant ...

As a hybrid technology that combines mechanical and electrical systems, electrohydraulic variable speed drives allow for motor speed adjustments to conserve energy and provide precise control over ...