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 ...
WEG Electric Motors has developed a new control regimen for standard totally-enclosed fan-cooled (TEFC) induction motors. Called OptimalFlux technology, the new regimen is ideal for use in driving ...
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 ...
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