Technical Blog

What is a Servo Drive?

A servo drive, sometimes referred to as an amplifier, takes the command signal for position, speed or torque requirement and adjusts the voltage and/or current applied to the servo motor using closed loop control.

A servo drive is an integral part of a servo system which also includes the controller, motor and feedback device. Communication to and from controllers and other devices can be via a simple digital and analogue i/o or digital fieldbus communication, such as EtherCAT, CANopen and many other industry standard protocols.

Servo Drives are an important part of our product portfolio here at Heason Technology. We offer a wide range of servo drives from our partners at KollmorgenElmo Motion Control and ABB.

What are Servo Drives used for?

Servo drives are generally used to control the speed, position and torque of brushless servo motors. They come in a variety of sizes and are suitable for static and mobile applications across many industries including:

  • Industrial automation including robotics
  • Aerospace and defense
  • Laboratory automation
  • Satellite communication
  • Offshore including subsea and down-hole
  • Extreme outdoor operation
  • Ground mobile
  • Marine

Servo Drives from Heason Technology

Servo Drives from Heason Technology come in a wide range of power options with advanced control technology, advanced safety functions and multiple fieldbus connectivity. We also offer servo drives with a small footprint that incorporate multiple features with high torque, enabling our customers to create more compact machines or vehicles without missing out on power.  

Our selection of servo drives have been designed and built to offer the precision and performance required for a wide range of applications. We have two distinct categories of servo drives; AC drives and DC drives. AC drives have single phase or three-phase mains supply from 120VAC to 480VAC, with peak current outputs of 4.5A to 140A. Our DC drives take DC input voltage from 8VDC to 800VDC, with peak current to 550A+. They can also be supplied in a variety of mounting options from PCB mounted (pinned) to surface and cabinet mount and even housed IP67 for washdown.

Servo drives are versatile, meaning they can run a wide range of standard and speciality motors which have various feedback types. Our servo drives support a wide range of connectivity protocols and are equipped with the latest features that advanced technology can offer.

Another important benefit of our servo drives is machine safety, with models offering TUV certification achieving PLe (ISO13849) and SIL3 (IEC61508). We also offer a wide range of drives for extreme/harsh environment conditions.

If you would like to find out more information about our range of servo drives, contact us on +44 (0) 1403 792 300 or email

We also provide downloadable information on all of our products.

Article published on: 01/08/2019

Article last updated on: 01/08/2019