Posted on 16 April 2019

Main Advantages of 3-level Inverters


3-level inverters can be used in many applications, notably UPS and solar inverters.

The main advantages of 3- level inverters are:

  • Smaller output voltage steps that mitigate motor issues due to long power cables between the inverter and the motor
  • Improvement of spectral performance
  • Reduction of size and filter of the inverter
  • Increasing of switching frequency without major impact to losses
  • 60 percent less efficiency losses compared to 2-level inverters
  • Reduction of stress to machine windings and bearings
  • Mainly used in transformerless UPS systems and PV inverters
  • Cost-efficiency (one module replaces two, easy to control, low commutation inductivity).


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