Motors and Mechanical Power Transmission

Watch: Servo drive system delivers maximum performance with minimum size

20 November 2020

The new Digitax HD series from Control Techniques delivers ultimate motor control performance and flexibility from a uniquely compact package. Targeting high axis count automation systems, Digitax HD provides all the benefits of a modular system with a common DC bus, with standalone drive flexibility.

The new series is focused on high overload, pulse duty applications but also provides continuous servo control, plus induction motor control, and is initially available with two functionality levels. Digitax M753 is designed as an optimized amplifier for high performance centralized control with EtherCAT integrated on-Source: Control TechniquesSource: Control Techniquesboard and simple rotary switches for fast network address assignment. The flexible Digitax M751 Base option allows design engineers to add up to two option modules from the existing Unidrive M range such as PROFINET, Ethernet/IP or an IEC61131 high performance motion controller for decentralized machine control.

For both single and multi-axis configurations, the Digitax HD series offers industry-leading compactness — the M753 EtherCAT variant is just 40 mm wide — that is 5 axes across the width of an A4 piece of paper with 10 mm spare. The drive is also designed to fit within shallow 200 mm cabinets and is reportedly the most compact 400 V servo drive available in the world.

Its patented Ultraflow system allows machine builders to further reduce cabinet size by up to 50% through expelling heat from the drive directly outside the cabinet. This approach offers the further benefit of enabling drives to be stacked without the need for a large air channel between them.

High dynamic applications will benefit from Digitax HD’s 300% peak performance pulse-duty overload capabilities, along with its 62 µs current loop and 16 kHz switching frequency. Its flexible speed and position feedback interface supports a wide range of feedback technologies, from robust resolvers to the latest single cable digital encoder technologies. Easy-access pluggable connectors and a dedicated multi-axis paralleling kit allow for rapid installation. Faster setup is facilitated by an integrated braking resistor and electronic motor name plate.

Working in tandem with the Digitax HD series, Control Techniques’ Unimotor HD is a high dynamic AC brushless servo motor delivering class-leading performance. With a wide torque range from 0.72 Nm up to 85 Nm with 255 Nm peak, rated speeds from 1,000 rpm to 6,000 rpm, several inertia levels and a broad selection of feedback options, Unimotor HD offers the perfect fit for high dynamic applications.

To contact the author of this article, email

Powered by CR4, the Engineering Community

Discussion – 0 comments

By posting a comment you confirm that you have read and accept our Posting Rules and Terms of Use.
Engineering Newsletter Signup
Get the GlobalSpec
Stay up to date on:
Features the top stories, latest news, charts, insights and more on the end-to-end electronics value chain.
Weekly Newsletter
Get news, research, and analysis
on the Electronics industry in your
inbox every week - for FREE
Sign up for our FREE eNewsletter
Find Free Electronics Datasheets