Synchronous motors - High performance in all applications - 20 Pages

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Synchronous motors - High performance in all applications

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Synchronous motors High performance in all applications Power and productivity for a better world™

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We provide motors, generators and mechanical power transmission products, services and expertise to save energy and improve customers’ processes over the total life cycle of our products, and beyond. 2 ABB | Motors and Generators | Synchronous motors

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Synchronous motors from the world’s leading supplier Choose ABB efficiency and quality ABB is the world’s leading supplier of synchronous motors and generators. We have been designing and building AC motors for mission-critical applications for over a century, and our know-how and experience have made us the preferred supplier in many different industries. Our synchronous motors are delivering high performance in industrial processes, the marine and offshore sectors, utilities and specialized applications all over the world. In every case we work with our customers, using our expertise in...

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Fixed and variable speed motors tailored for each specific application Fixed speed motors Fixed speed synchronous motors are typically used in applications such as compressors, fans, pumps, wood grinders and refiners. In each case we utilize advanced software tools to optimize the motor design for the specific application and ensure that the chosen starting method is appropriate. The results of this work are processed into an easy-to-understand format and incorporated into the technical specification we provide with each proposal. We can engineer the motor to develop sufficient torque for...

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Synchronous motors | Motors and Generators | ABB 5

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The rotor is key to excellent overall performance The rotor plays a crucial part in achieving the best possible electrical and mechanical performance. Higher speed motors (four and six poles) have solid rotors with integrated poles made from a one-piece steel forging. A solid pole plate is attached to the pole, and this design has good overload capability and low harmonics. At the same time this rotor configuration contributes to the motors’ excellent starting characteristics, high starting torque and low starting current. The large cooling surfaces and effective flow of cooling air mean...

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Shaft The shaft is manufactured of forged or rolled steel and machined to exact specifications. The shaft ends can be cylindrical, conical or flanged, or two shaft ends can be provided (double end drive). Rotor windings The rotor windings are either made of preformed enameled rectangular copper wire or flat copper. Proper supports between adjacent windings are used to ensure stability up to the rated overspeed. The rotor windings are made to match the insulation class of the stator. This ensures outstanding reliability and a long service life, even with asymmetric loads or under exceptional...

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Modular stator design enables performance to be optimized Each application has its own specific requirements for motor performance. Our modular stator design allows us to precisely match the performance of every ABB synchronous motor to the needs of its application. The stator core itself is built of stacked, high grade, lowloss laminated electrical steel, insulated on both sides with high quality insulating coating (heat-resistant inorganic coating is also available). The use of high grade core material increases efficiency and therefore reduces operating costs. Radial cooling ducts ensure...

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Robust frame ensures great stability and optimum dynamic behavior For maximum flexibility, ABB synchronous motors are designed for horizontal, inclined or vertical mounting (vertical mounting available for motors with eight or more poles). The robust frame transfers dynamic and static stresses directly to the foundation, reducing vibration and contributing to the overall excellent performance of the motor. We can supply motors – even up to the largest sizes and outputs – as complete, ready-to-install units (in some cases the heat exchanger or terminal box has to be removed prior to...

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The right excitation method for every application At ABB we take care to ensure that the excitation system meets the very high overall standards of reliability that we have set for our synchronous motors. For fixed speed applications and variable speed applications with less demanding dynamic control requirements, a brushless exciter and automatic voltage regulator are generally provided. The brushless system has no wearing parts, and the external excitation power requirement is low. The brushless exciter is a separate AC generator mounted on the motor shaft at the non-drive end. In most...

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Higher speed motors (four and six poles) use a compact, brushless exciter unit mounted on the rotor shaft outboard of the bearings. No independent support or alignment is required. The high level of field forcing delivers improved system performance, which increases the production of reactive power and is beneficial when faults arise in the supply network. Lower speed motors (eight or more poles) typically have a brushless exciter unit mounted inside the motor enclosure. Excitation control The motor excitation control panel can be supplied in a variety of basic formats. It houses the...

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Effective and uniform cooling of the complete motor With a wide range of cooling methods available, the optimum system can be selected for the motor’s operating and environmental conditions. Whichever method is chosen, it will provide effective cooling of the complete motor. The three most commonly used cooling arrangements are air-to-water, air-to-air and open air. Air-to-water closed circuit cooling The cooling air circulates in a closed circuit through the active parts of the motor and then through an air-to-water heat exchanger. This cooling method is especially recommended if the...

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Proven insulation system delivers ultimate reliability ABB synchronous motors use the MICADUR® Compact Industry (MCI) insulation system, which is based on the vacuum pressure impregnation (VPI) method. The VPI and curing of the completely wound and connected stator winding with a specially formulated epoxy resin ensures a sealed and homogenous insulation system. This results in high dielectric strength, excellent heat transfer, and the elimination of hazardous internal partial discharges. We have been using the MCI system for more than 30 years. It has been used on tens of thousands of our...

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