Variable frequency drives, commonly known as inverters, are used to control the rotational speed or torque of AC electric motors. By varying the frequency, they enable smooth speed control of motors, as well as gentle start-up and braking. By regulating speed, they enable a significant reduction in the energy consumption of the entire application. They are used across the entire industry. Depending on requirements and the precision of control needed, we offer various ranges of variable frequency drives, optimised in terms of cost and functionality for different applications. With appropriate control, it is also possible to implement positioning functions for the drive system.
Choose a variable frequency drive that suits your needs
AMD-E converter
AMD-E economic vector drive with PLC onboard (0.4–22 kW)
Open-loop scalar and vector control
Overload capacity of up to 150% of the rated current for 60 seconds
Advanced programming functions, a built-in PLC controller and a comprehensive diagnostics menu
AMD-CP for pumps and fans with PLC (0.75–400 kW)
Inverters for pumps and fans
Built-in PLC controller and RS-485 serial interface
Installation of two expansion cards
Multi-pump mode
AMD-C converter
AMD-C vector drives with PLC (0.75–355 kW)
A classic vector inverter
A wide range of programming and diagnostic functions
Modular design with expansion options (I/O, filters, braking modules, LCD keypads, braking resistors)
Commander S100 Inverter
Commander S100 (0.18–4 kW)
An easy-to-use variable frequency drive
Can be programmed via a smartphone
U/f and vector control in an open-loop rotor flux control system for induction motors (RFC-A)
Commander C200 C300 inverter
Commander C200/C300 (0.25–132 kW)
Compact variable frequency drive with built-in PLC
C200 – Universal variable frequency drive
C300 – Variable frequency drive with built-in STO inputs
Unidrive M700 drive
Unidrive M700 – (0.37 kW – 1.2 MW)
Class-leading performance from induction motors, servo motors and permanent magnet motors, combined with a built-in real-time Ethernet protocol
U/f and vector control in open-loop mode, open-loop and closed-loop rotor flux control for induction motors (RFC-A), open-loop and closed-loop control for permanent magnet synchronous motors (RFC-S), mode
Control of permanent magnet servo motors
Digitax HD Converter
Digitax HD servo drives
Digitax HD servo drives are state-of-the-art systems designed for single-axis and multi-axis operation
Control can be achieved via digital and analogue inputs, communication interfaces or via the built-in motion controller
Control of both speed and torque
Unidrive DFS drive
Unidrive DFS – (55 kW – 470 kW)
A ready-to-use variable frequency drive installed in a control cabinet.
U/f control and vector control in open-loop mode
Open-loop and closed-loop rotor flux control for induction motors (RFC-A)
Unidrive M600 drive
Unidrive M600 – (0.75 kW–1.2 MW)
High-efficiency variable frequency drives
For induction motors and sensorless control of permanent magnet synchronous motors
U/f and vector control in open-loop mode, rotor flux control in open-loop and closed-loop modes (when the SI Universal Encoder module is added) for induction motors (RFC-A), open-loop control for permanent magnet synchronous motors
Discontinued items
Unidrive SP
A universal inverter from a global corporation
Unidrive SPM
A variable frequency drive designed for the parallel connection of inverter power modules
A universal inverter from a global corporation
Digitax ST AC servo drives
Dynamic indexer axis (1.7–8 A/x300%)
Free software tools for configuring, parameterising and monitoring the operation of a servo drive
Four versions
Discover software designed to support the monitoring of electrical installations
Discover the potential of our variable frequency drives
Discover solutions that allow you to smoothly control motor speed and torque, reduce energy consumption and boost the efficiency of the entire system
New additions to our range
Unidrive SPM
See product
Digitax HD
A modern servo drive for single- and multi-axis applications, offering high dynamic performance and broad communication compatibility.
Find out how we support our customers
Take a look at our projects and find out more about solutions that improve comfort and safety when working on electrical installations.
Expert insights
Find out how correctly selected switch disconnectors improve safety, make maintenance work easier and protect your installation against unforeseen incidents.
Optimise the performance of your motors with variable frequency drives
Speak to an expert about selecting variable frequency drives, monitoring operating parameters and diagnosing drive issues in your system
What should you look out for when choosing a variable frequency drive?
Selecting the right variable frequency drive is crucial for its subsequent correct operation and affects the payback period for the purchase. Therefore, the purchasing decision requires not only analyses of technical parameters such as the motor’s rated voltage and rated current or the operational overload capacity required of the motor, but also a review of other control elements and the drive’s internal features, which may affect the safety of the installation and personnel. Here are a few of them:
- features – consider how you wish to control the motor, what control functions the drive itself should perform directly, and whether it is useful to employ an internal PLC controller;
- safety – check whether any certified safety functions are required for the intended application;
- Compatibility with communication networks – check whether the drive can be connected to the communication network in use.
If you are unsure whether a particular variable frequency drive is the right choice for your application, please contact us. We will help you make a decision and support you through the subsequent stages of implementation.