Motors and their associated equipment must be protected against both overload and overcurrent (short circuit or ground fault). This function is usually split, with ...

Learn important methods, formulas and calculation details to determine the power output of a coreless motor, the speed-torque curve of the motor, the current and efficiency plots, and the theoretical ...

Linear-motor driven plunger pumps are most efficient at transforming mechanical energy to hydraulic work in low-producing and highly deviated wells. Linear-motor driven plunger pumps (LMDPP) are most ...

Energy efficiency is one of the most misunderstood aspects of fractional horsepower motors and gearmotors. It normally does not receive much attention; however, efficiency can be critically important ...

In today’s world, motors are ubiquitous, powering everything from household appliances to industrial machinery. The importance of optimizing motor control for energy efficiency cannot be overstated, ...

Continuing headlines about superefficient electric drives might lead some observers to wonder about the future of three-phase induction motors. The truth is that induction motors aren’t going away any ...

As a group, electric motors represent one of the best opportunities to save energy and reduce operating costs in a power plant. The U.S. Department of Energy (DOE) estimates that American industry ...

NEMA (voltage variation). The tolerance for voltage variation under running conditions in NEMA Std. MG 1, 12.44, is ±10% of rated voltage at rated frequency. If the frequency varies from rated, the ...