Calculate your annual savings if you control the motor with a Variable Speed Drive (VSD).
* The calculation is approximate and based on typical savings rates (pump/fan ~40%, compressor ~20%, conveyor ~15%). The exact effect depends on the load profile — our engineers will provide a precise calculation for free.
Consultation:
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How does a variable frequency drive save energy?
A conventional motor always runs at full speed — even when production doesn't need half of its capacity. A variable frequency drive (VFD) precisely matches motor speed to actual demand, and excess revolutions are exactly where your electricity bill "burns". The dependence on fans and pumps is cubic: reducing speed by 20% reduces consumption by almost 50%.
Where does the VSD provide the greatest effect?
Pumps and fans — record-breakers: typical savings of 30-50%, especially where flow is currently "choked" with a throttle or damper. Screw compressors — 15-35%, due to the idle running costs of Load/Unload cycles. Conveyors and elevators — linear savings plus gentle handling of belts and chains. If you are interested in comparing starting currents (DOL ×7 · Soft Starter ×3.5 · VFD ×1.2), open our Motor Start Simulator.
Frequently Asked Questions
Is a VSD worth it for a motor constantly running at full load?
If the motor truly runs 24/7 at 100%, the energy effect will be small — but soft start, protections, and precise control still remain. In real production, however, "constant full load" is rare: measure it and you'll be surprised.
What data do I need for an accurate calculation?
Motor power, operating hours, electricity tariff, and approximate load profile — everything is in the calculator above. For final selection, contact us — we will refine the calculation free of charge.
