Motor lineage, design knowledge help when choosing servo or induction motors

Webcast: In the Control Engineering RCEP Accredited webcast, “Servo vs. induction motors: Which should be considered for what applications?” information presented suggests that understanding motor lineage and motor design help with motor specification. See graphics.


There are many variations but these pictures illustrate the basic difference between a cast induction motor rotor and a permanent magnet rotor in a PM motor. Courtesy: Phoenix Tech Consulting, Control EngineeringUnderstanding motor lineage and design help in choosing between servo or induction motors for various applications (see graphics), according to a Nov. 6 webcast (archived thereafter). Motor expert Muhammad Mubeen, president of Phoenix Tech Consulting, discusses, “Servo vs. induction motors: Which should be considered for what applications?” for the Control Engineering RCEP-accredited webcast, with a question-and-answer session afterward.

About the motor technology tree, Mubeen says, “On the ac side we will deal with induction (or asynchronous motors). On the dc side, we have permanent magnet (PM) brushless motors, which are most commonly used.” The lineage shown in the graphic leads to the primary focus of the webcast discussion, PM servo motors and induction motors, and when and why they are used for what applications.

Motor technology tree examines rotary motor types, showing lineage down to ac induction and dc permanent magnet brushless motors for servo applications. Courtesy: Phoenix Tech Consulting, Control Engineering
The webcast covers:

- Overview and history of the motor technology landscape

- Definition of terms (servos, induction motor based systems)

- Differences between the two technologies: servos vs. induction motor based systems

- Relative pros and cons from the standpoint of applications and cost

- Criteria for choosing between the two technologies, including tables

- A broad list of applications and practical guidelines for choosing the right technology.

Those listening to webcast live can use the interface to submit questions for a Q&A session after the presentation. Webcast, questions, and answers will be archived for later viewing. Getting 8 of 10 correct on a quiz will deliver a profession development hour (PDH) or 0.1 CEU.

Information about this and other Control Engineering webcasts is available. 

- Mark T. Hoske, content manager, CFE Media, Control Engineering and Plant Engineering,

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