The line of adjustable-speed drives provide accurate and repeatable speed settings and can be used as a prime mover connected to a motor, or as a secondary drive The line of adjustable-speed drives ...

Adjustable speed drive allows easy adjustment of application rates — for example, for seed and fertilizer distribution. Accurate, repeatable speed settings; when used as a prime mover, drive acts as a ...

Prior to the advent of the adjustable-speed drive (ASD), the polyphase induction motor operated as a constant-speed motor. Figure 1 shows the well-known torque and current curves versus speed for the ...

In order to clear up confusion over motors powered by adjustable speed drives, NEMA’s Industrial Automation Control Products and Systems section and Motor and Generator section recently developed the ...

Exelon Nuclear recently replaced the original motor-generator sets for its boiling water reactor (BWR) recirculation pumps at its Quad Cities Generating Station Unit 1 with adjustable-speed drives. We ...

ROSSLYN, Va. — The National Electrical Manufacturers Association (NEMA) has published NEMA ICS 61800-6 TR-2015, Adjustable Speed Electrical Power Drive Systems, Part 6: Guide for Determination of ...

The H2 line of adjustable speed drives are designed to provide reliability, ease of use, and high performance. The H2 line’s superior reliability is a result of extensive testing during each design ...

For many retrofit projects, the use of a VFD seems like a “no brainer.” Drives are now cheaper and more reliable than ever, and the benefits of efficient control of motors can’t be beat. Still, there ...