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.
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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 aspects as well as application and operation.
Numerous motor types are available, some with very specific applications, but the most commonly used are general purpose and inverter duty. General purpose motors can be used for a wide variety of applications and provide basic functionality. Inverter duty motors can be used with VFDs for precise control and can run at very slow speeds without overheating. For more information about these motors and help with choosing the correct motor type, read: Choosing General Purpose vs. Inverter-Duty Motors
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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.
Open drip proof (ODP) motors are economical models that feature housings with open vents designed to prevent overhead drips from entering the motor. This open style allows airflow over the internal components, resulting in a motor that runs cooler and thus more efficiently.
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.
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.
Severe duty motors are ideal for applications located in extreme environments. See individual motor specifications for detailed information on certified hazardous class, division zone and groups supported.
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IEC motors are built in accordance with the european based IEC standard and are used frequently in global machinery. These motors provide the same power ratings as NEMA motors, but have a smaller footprint.
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Brake motors are used where positive fast stopping or holding of a load is required. These motors are available in 3-phase general purpose models with brake coils that match the motor's line voltage.
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.
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.
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.
Accessories, spare and replacement parts for AC motors include:
*Shipped standard ground or LTL (see Shipping Options for complete details and restrictions).
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