AC motors convert electrical energy into mechanical movement. Pervasive in factory and commercial applications, AC motors have a lower maintenance requirement than DC motors, and when paired with a VFD, can offer similar performance in torque.
AC motors are electric motors driven by alternating current. AC motors are widely used in industry, primarily due to their high efficiency, and their ability to produce constant torque up to the rated speed. Considerations when specifying an electric motor include mechanical and environmental considerations as well as application and operation.
General Purpose AC induction motors are widely used in general applications. All 3-phase models are inverter rated and can be used with variable frequency drives to improve operational efficiency and control. For low speeds and precise control, consider high performance inverter-duty motors. For more information on when to choose which type, read Choosing General Purpose vs. Inverter-Duty Motors
General purpose AC induction motors are widely used to power pumps, blowers, conveyors and other industrial machinery. Inverter-rated motors can be used with VFDs to improve efficiency. From small single-phase to large 3-phase motors, models are available for general use or hazardous locations.
High-performance inverter-duty motors are designed to handle lower speeds without overheating, and can withstand the PWM output of an inverter (VFD). Inverter-duty motors are used in variable speed applications such as machine tools, conveyors, crane and hoist systems, extruders and packaging/converting equipment. These motors may also have encoder capability for use with a vector VFD.
4-in-1 AC motors are a single motor type designed to support a variety of common industrial or commercial installations. 4-in-1 motors can be used for general purpose or, when 3-phase, inverter duty applications, and are suitable for horizontal or vertical mounting.
Washdown-duty AC induction motors can power pumps, blowers, conveyors and other industrial machinery in environments where wet cleaning is required. In various NEMA frames with rigid base or C-face mounting provisions, available models are made from stainless steel, or rolled steel with a chemical-resistant white epoxy finish. Inverter-rated models can improve operational efficiency.
Conveyor/farm duty motors are over-built for demanding industrial or compressor-duty applications. Delivering high starting torque at moderate starting current, rugged TEFC (Totally Enclosed Fan Cooled) motors have an IP55 ingress rating and include resettable (class 10) locked-rotor current overload to withstand serious abuse.
Hazardous location motors are suitable for installations/environments where fire or explosion hazards may exist due to flammable gases or vapors, flammable liquids, combustible dust, or ignitable fibers. See individual motor specifications for detailed information on certified hazardous class, division zone and groups supported.
Centrifugal jet pump AC induction motors are used to power industrial, commercial, centrifugal, and hydraulic pumps. Available in 1-phase or 3-phase configurations, jet pump motors have double-sealed bearings, and a NEMA 56J or 56HJ frame.
Permanent Magnet AC (PMAC) motors provide a smaller footprint and higher efficiency at lower speeds and partial loads when compared to standard AC induction motors. These high-performance inverter-duty motors are designed for use only with a VFD that is capable of controlling a PMAC motor, and cannot be controlled with an across-the-line motor starter.
*Shipped standard ground or LTL (see Shipping Options for complete details and restrictions).
Guidelines for choosing an Ironhorse general purpose motor vs. an inverter-duty motor are available below. If your application falls within the guidelines, there is no need to apply an inverter-duty motor.
General purpose AC induction motors can be run with drives in many applications; however inverter-duty AC motors are designed to handle much lower speeds without overheating and they are capable of withstanding higher voltage spikes without their insulation failing.