Motor Control
Specified against the whole electrical powertrain, not the motor alone
A drive picked straight off a datasheet still has to survive the supply feeding it, the cable run to the motor and the load on the other end. Get that wrong and it doesn’t show up as an obviously bad decision at the time. It shows up months later as nuisance tripping, harmonic distortion or a motor that fails early. We specify the Danfoss range with the application engineering to get it right the first time.
It starts before the order
Three questions we ask alongside the part number, so the drive suits the supply feeding it and the load on the other end.
Where does it run?
Incoming supply and transformer capacity, cable length to the motor, enclosure conditions, zone rating and washdown.
What is it doing?
Starting, speed control or full process control. The load type, the inrush it can tolerate, and the network it has to talk to.
What if it is wrong?
Nuisance tripping, harmonic distortion, a motor that fails early, audit exposure, a line down now.
How We Get Motor Control Right
From grid supply to mechanical load, in three steps.
We Map the Full Electrical Powertrain
Grid supply, transformer capacity, cable length and the mechanical load all shape which control method survives on site, not just the motor nameplate.
We Match the Control Method to the Load
Direct online, soft starter or variable speed drive, chosen against inrush, speed control and process requirements, not habit.
We Engineer the Complete Installation
Filters, safety circuits, remote I/O and condition monitoring specified alongside the drive, so the whole system is compliant and supportable.
What Sites Get Out of It
The outcomes that matter on site.
Compliance You Can Evidence
Pull-wire e-stops, interlocks and safety relays documented as part of every motor control installation.
Bearing Failure Caught Weeks Out
Vibration monitoring on drive-fed motors turns reactive maintenance into a planned job.
Fewer Nuisance Trips
Correctly specified filters and harmonic mitigation remove the electrical noise that trips drives and disrupts other plant.
One Team for the Whole Powertrain
Control, safety, monitoring and communications specified together, not bolted on afterward.
Choosing the Right Control Method
Three methods, three sets of trade-offs. The wrong one shows up as high inrush current, nuisance tripping, harmonic distortion or premature motor failure.
Danfoss VLT, VACON and iC series drives are our primary recommendation across VSD applications. For soft starting, we supply the Danfoss VLT MCD range.
How We Fit Into Your Motor System
From grid to load. Understanding the full electrical and mechanical interaction is how we avoid the hidden issues that catalogue-only selection misses.
Utility supply, generator or site distribution characteristics.
Voltage conversion, protection and supply stability.
What it does: Variable speed drive, soft starter, filter or harmonic solution.
AC induction motor, permanent magnet motor or specialty motor type.
Pump, fan, conveyor, compressor, hoist, agitator or process machine.
Our Engineering Checklist
Before recommending equipment, we verify all nine, so the drive is not only correctly sized, but correctly integrated into the complete electrical powertrain.
The Danfoss Drive Range
Frequency and power converters for every application tier, from compact general-purpose drives through to liquid-cooled solutions for the most demanding industrial and marine applications.
Introducing the Danfoss iC7
A significant step forward in drive technology, with IIoT-ready connectivity with built-in dual Ethernet, switchable fieldbus protocols, hardware-based cybersecurity and Safe Torque Off up to SIL3 as standard, in a more compact, energy-efficient package.
The modular architecture means you can expand functionality as your needs evolve, without replacing the drive.
Explore the iC7Where This Application Matters Most
The industries running Danfoss motor control every week.
Products and Brands Behind This Application
Danfoss drives and the wider electrical ecosystem that makes up a complete motor control installation.
Sends run/stop/speed commands to the drive based on process logic.
Connects motor status signals back to the controller, reduces wiring across distributed sites.
Emergency stop and safety interlock devices integrated into the motor control circuit.
Detects bearing wear and motor faults before failure, moves maintenance from reactive to predictive.
Replacing Obsolete Drives & Ageing Motor Control
Many facilities still run on ageing or unsupported drive platforms where spare parts are limited, programming knowledge is lost, and failure means extended downtime.
Planned upgrade or emergency breakdown replacement, we simplify the transition.
Frequently Asked
Should I use a variable speed drive or a soft starter?
If speed control, energy saving or process optimisation is required, a VSD is generally the better solution. If the goal is simply reducing inrush current and mechanical shock during start-up, a soft starter may be sufficient.
Can you help replace obsolete ABB, Schneider, Allen-Bradley or Siemens drives?
Yes. We regularly assist with migration from ageing or unsupported platforms into current Danfoss and VACON equivalents.
Do I need a sine wave filter or dv/dt filter?
It depends on motor cable length, motor insulation quality and EMC considerations. We can assess whether output filtering is required.
Can Danfoss drives help reduce harmonic distortion?
Yes. Danfoss offers a range of harmonic mitigation and line conditioning solutions depending on site compliance requirements.
Get the Right Specification First Time
Whether you’re specifying a new installation, replacing an obsolete drive, or solving a recurring motor issue, our technical team can verify the correct Danfoss motor control package before you buy.