Variable Speed AC
Engineered for variable frequency power, these motors deliver constant torque across the full speed range. Available in traditional or compact square frame designs, they ensure smooth control and meet NEMA MG-1 Part 31 standards.
Variable Speed. Constant Performance.
Unlike standard AC motors designed for fixed-speed, across-the-line operation, ABB Baldor-Reliance® variable speed motors are purpose-built for wide speed range performance with a VSD. Engineered with distinct construction and performance features, they deliver constant torque, smooth acceleration and reduced mechanical stress on connected equipment.
Features that matter
Variable speed AC motors are designed to meet NEMA MG-1 Part 31, with features such as enhanced insulation, shaft grounding and optional encoders, ensuring reliable operation across a wide speed range under variable-speed power.
Advanced control
Customers choose variable speed AC motors for precise speed control, enhanced energy efficiency, reduced mechanical wear and greater process flexibility—delivering reliable performance and lower operating costs.Performance
Variable speed motors deliver precise speed and torque control, enabling smoother acceleration and deceleration that reduces mechanical stress and extends motor and equipment life.Quality components
Constructed with high-grade materials and a Class H insulation system, variable speed motors are built to withstand higher ambient temperatures, handle overload conditions and tolerate voltage spikes—making them ideal for the demands of VSD operation.Robust design
Available in a range of enclosures—from open designs for clean environments to totally enclosed models for harsh, contaminated conditions—variable speed motors come in rolled steel, cast iron and laminated steel frames.Inverter duty
Inverter duty per NEMA MG1 means these motors are built to withstand the harsher electrical and mechanical conditions of VSD use, ensuring longer life and reliable performance.Energy efficiency
By matching speed to load, these motors use only the necessary energy, leading to significant savings—especially in pumps and fans—reducing operating costs and environmental impact.Reduced maintenance
Variable speed motors operate more smoothly, reducing wear from start-stop cycles and shock loads, which lowers maintenance needs, improves reliability and minimizes downtime.Compliance
Designed to meet evolving standards like NEMA MG-1 Part 31, variable speed motors ensure regulatory compliance and compatibility with modern drives, protecting investments and supporting sustainability goals.Common Applications
Fans, Pumps, Conveyors, Compressors, Extruders, Winch, Cranes & hoist, Winder
Industries
ABB’s Baldor-Reliance® variable speed motors deliver outstanding performance and durability across a wide range of industrial applications. Offered in both open and enclosed designs, these versatile motors are available in NEMA Premium and NEMA Super-Premium options, ensuring superior reliability, efficiency and operational excellence.
HVACR
ABB supports a wide range of buildings—office towers, hospitals, schools, data centers—and all types of applications, including air handlers, water pumps, cooling towers and chillers. We ensure these motors and drives operate with maximum efficiency and reliability.
Pulp & Paper
From pulping to finishing, motors drive every critical process in your paper mill—delivering the power, reliability and performance your operation depends on.
Water & Wastewater Treatment
From water intake and treatment, through transportation to distribution to waste water collection and treatment - motors are the heartbeat of your water treatment operations.
Cement, mining and minerals
As society urbanizes, the demand for materials like cement, metals and minerals grows. Modern infrastructure and the shift to cleaner energy require more metals and minerals to be mined. At ABB, we provide motors and drives that help customers operate more efficiently and sustainably.
Distribution center and warehousing
Warehouse distribution centers face ongoing pressure to boost throughput while maintaining quality and reliability. Motors and drives offer an integrated solution, delivering power from the electrical line directly to the driven shaft, all from a single source supplier.
Food & beverage
ABB provides a complete range of energy-efficient motors designed for the food and beverage industry. Our motors power every stage of the process—from raw material handling to processing, conveying, packing and storage—while meeting the industry's high standards for performance and reliability.
Discover ABB's Innovative Software and Tools
Unlock the power of ABB's cutting-edge software and tools designed to simplify your industrial electric motor journey. Whether you're selecting, configuring, replacing, or upgrading, our intuitive tools are here to guide you every step of the way. With ABB, finding the perfect match for your motor needs has never been easier. Explore now and make the most informed choice for your operations.
Select your motor
Search our comprehensive list of ABB Baldor-Reliance® motors and gain access to detailed product specifications, technical data and product documentation.
Configure your motor
ABB’s Motor Connector is an online tool that allows experienced users to select, customize and configure motors to exactly match their performance and application needs.
Replace your motor
Have an existing motor you’d like to convert to ABB? Use this tool to find your ABB motor.
Upgrade your motor
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