Feature

Choosing the right drive strategy for stepper motor applications

Stepper motors are popular choices for many motorised systems – in particular, because they are easy to drive. But having knowledge of the various stepper motor technologies and the ways they can be controlled can be a significant advantage.

02/06/2021 12:47:25

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With an understanding of bipolar and unipolar driving methods, designers will be in a better position to implement a truly optimised solution.

Clémence Muron, Application Engineer at Portescap, discusses the differences between bipolar drives
and unipolar drives for stepper motors, and examines their advantages and limitations in specific applications.

For motor-driven applications that require precise and predictable positioning in a compact, cost-effective package, stepper motors have been a
popular choice since their introduction in the 1960s. In recent years, advances both in the motors themselves and in the drive electronics have given steppers decisive performance advantages in demanding applications – from machine tools
to medical equipment.

The simplicity of the drive technology for modern steppers is one of the keys to their enduring popularity, but even so, there are design decisions that need to be made in
the control concept which can have a huge bearing on the success of the application. In particular, should the designer opt for unipolar control or bipolar control of the motors?

Read the full article in the June issue of DPA

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.