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 ...

There's more to selecting a motor than meets the eye. Motors typically are grouped into three categories. General-purpose motors are designed around industry standards and feature standard operating ...

Frequently, when it comes to step motor selection, users will select a motor with the highest holding torque rating, assuming that it will give them optimal performance. However, it is an improper ...

As energy costs rise, conservation is becoming an important factor in many purchasing decisions. Since energy costs account for more than 94 percent of usage costs over a 10-year operating period, ...

Often, an HVAC system is designed by the selection of individual components and not by a whole-system approach. This has become common practice for mechanical engineers, usually resulting in poor ...

Motor selection is often a complicated process that takes a lot of work with various vendors. Groschopp engineers share knowledge and expertise about the motor selection process. Focusing on four ...

DC motors come in many forms, but they all have the same job: turning electrical energy (DC) into mechanical energy. Although DC motors have a common operating principle, many applications—including ...

The electromotor, which is sometimes called motor or dynamo, is responsible for creating the mechanical force necessary to rotate the fan in the cooling tower. In other words, the fan or impeller of ...

Allient Inc. (Nasdaq: ALNT) (“Allient” or the “Company”), a global designer and manufacturer of speciality Motion, Controls, Power and lightweighting composite / advanced materials products and ...

An electric motor has a stator and a rotor. Both are electrically/magnetically induced to produce magnetic fields either through current fed coils or permanent ...