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Aimed at high axis count applications

24 April 2018

Control Techniques is launching a new 400V servo drive range within the Unidrive M family. Tentatively unveiled at the SPS show in Germany at the back end of 2017, and one of the early launches from the company since its purchase from Emerson Electric by Nidec, they were initially available in Germany and Italy, and are scheduled for UK launch summer 2018

Optimised for high dynamic applications, the M750 drives are aimed at high-axis-count applications, and span ratings from 0.7–51Nm (153Nm peak) and 1.5–16A (48A peak). They are designed to combine the benefits of a modular system with a common DC bus, with the flexibility of standalone drives. There are three compact frame sizes, making the Unidrive M750 one of the smallest servo drives available on the market, together with single-cable motor and drive packages.

The drive offers full servo control plus open loop permanent magnet motor and induction motor control across four functionality levels: EtherCAT, MCi machine control, Ethernet and the flexible Base drive.

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 in two variants:
•  The Unidrive M753 – an amplifier optimised for high-performance centralised control with onboard EtherCat, and rotary switches for assigning network addresses rapidly.
•  The Unidrive M751 Base version, which accepts up to two option modules from CT’s existing Unidrive M range, including Profinet, Ethernet/IP or IEC61131 high-performance motion controls for decentralised machine control.

The Unidrive M753 is designed as an optimised amplifier for high performance centralised control with EtherCAT integrated on-board and simple rotary switches for fast network address assignment.

The drive width of the M753 EtherCAT variant is only 40mm: this means five axes across the width of an A4 piece of paper with 10mm to spare, or seven axes across the landscape dimension! The drive is also designed to fit within shallow 200mm cabinets.

Alternatively, the flexible Unidrive 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 decentralised machine control.

Reduced cabinet size

The 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 enables drives to be stacked without the need for a large air channel between them.

High dynamic applications will benefit from the 300% peak performance pulse-duty overload capabilities of the Unidrive M750, along with its 62µs current loop and 16kHz switching frequency.

Flexible speed and position feedback interface supports a wide range of feedback technologies

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.

Installation features include easy-access pluggable connectors and a dedicated multi-axis paralleling kit for rapid installation; integrated braking resistor and electronic motor name plate for faster setup; and quick commissioning using the Unidrive M Connect PC tool, or an optional SD card.

Finally, Machine Control Studio provides a flexible and intuitive IEC61131 environment for programming automation and motion control features. Designed to work in tandem with the Unidrive M750 series, Control Techniques’ Unimotor HD is a high dynamic AC brushless servo motor. It has a wide torque range, from 0.72 to 85Nm with 255Nm peak, rated speeds from 1000 to 6000rpm, several inertia levels and a broad selection of feedback options.

Key Points

  • M750 drives designed to combine the benefits of a modular system with a common DC bus, with the flexibility of standalone drives
  • The new series focused on high overload, pulse duty applications but also provides continuous servo control, plus induction motor control
  • Patented Ultraflow system allows further reduction cabinet size by up to 50% by expelling heat from drive directly outside the cabinet

 
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