The case for hollow shaft torque motors

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Permanent magnet synchronous torque motors offer significant advantages on high energy consuming and high dynamic applications.

Today's machine designer must evaluate more factors than ever in approaching a new project. Likewise, the integrator and retrofit engineer has expanded options, not only as a result of new technologies, but also because of critical areas of focus such as reduced energy consumption, faster assembly time, vendor reduction and smaller footprint achievement.

In the realm of motion control, one type of motor with a relatively short history has made significant advancements that necessitate a new look at its potential in many application areas. These applications range from machine tool rotary tables to various packaging, printing, converting, extruding, papermaking, plastic film and materials handling machinery, anywhere direction must be reversed with a very high degree of accuracy, no backlash (hysteresis) and the maintaining of motion control, contrasting the necessary decoupling of a conventional motor and gearbox.

Enter the often-overlooked permanent magnet, synchronous torque motor. Torque motors are direct drives built for rotary axes where high torque and high precision are required at relatively low speeds. With significantly lower installation time, maintenance requirements, component part count and space allowance, these motor types are frequently viable alternatives to geared motors.

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