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IE4 servomotors deliver high torque and speeds

31 March, 2017

Rockwell Automation has announced a line of permanent magnet servomotors with efficiencies of at least IE4, designed to deliver high levels of continuous torque at high speeds for long periods of time, thus helping manufacturers to achieve high machine throughputs. The Allen‑Bradley Kinetix VPC motors are aimed at processes such as converting, printing and web-handling.

The motors’ interior permanent magnets support field-weakening, reducing electromagnetic resistance and allowing the machines to carry loads continuously and well above their rated speeds. “This allows manufacturers to keep web lines and winders running at high speeds and constant power,” says product manager, David Rajala.

A cooling fan and fins on the motor are said to result in high torque and power output. High-resolution, accurate encoder options allow precise, responsive control, especially in printing applications.

The servomotors are designed to reduce machine downtime in several ways. The large, robust bearings have long lives, while the quick-change fans are field-replaceable, helping to raise uptime. An optional single cable for both power and feedback can help to cut installation, set-up and maintenance times, compared to dual-cable motors.

Rockwell's servodrives can keep web lines and winders running continuously at high speeds

The motors currently have to be used with Allen-Bradley Kinetix 5700 servodrives, but Rockwell says it plans to evaluate other drives in the future. The motor and drive are both programmed using Rockwell Software’s Studio 5000 design environment, which can help speed up machine deployments and reduce the likelihood of manual errors.

A built-in foot-mount option provides an alternative to the traditional flange-mounting.

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