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 ...

The National Electrical Manufacturers Association (NEMA) has reactivated and published ANSI/NEMA C50.41, "American National Standard Polyphase Induction Motors for Power Generating Stations." ...

ROSSLYN, Va. — The National Electrical Manufacturers Association (NEMA) announced it has revised NEMA MG 1-2016 Motors and Generators. NEMA MG 1 assists users in the proper selection and application ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

THE first edition of this work appeared in 1904. Since then remarkable advances have been made in electrical engineering. A foremost place in this progress must be given to electric motors, and more ...

MR. BEHREND, in the preface to his book, rather offers an apology for adding one more to the already overwhelming number of books dealing with electricity and its applications. In some cases an ...

Electric motors, which convert electrical energy into mechanical energy, play an essential role in a variety of industrial and robotics applications. Given that electric motors account for ...

Adjustable-frequency drives have been billed as an energy efficient way to drive three-phase ac induction motors. Nevertheless, designers should understand that motors fed by inverter power experience ...

All major manufacturers of three-phase ac induction motors offer inverter-duty models with insulation sufficient to protect the windings, but the bearings are often left vulnerable to damage — ...