How to prevent motor whistling with frequency converter?

February 23, 2023
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Invertek Drives frequency converters are designed for control, regulation and protection of electric motors. Do you have a whistling sound when the engine is running? In the following article, you can lern how to fix this problem by changing just one parameter. In addition, in the video material we prepared, you can also see a real example of how to quickly prevent motor whistling in 1 minute with a frequency converter.

In our example, we will use an Optidrive E3, single-phase frequency converter, a potenciometr and a single-phase motor. The previous videos show you how to tune the engine parameters.


We perform the configuration using the main panel of the frequency converter.

Application of frequency converters Optidrive E3:

  • conveyors, mixers, treadmills;
  • metering, bore and portable pumps;
  • swimming pools, SPAs and fountains;
  • air handling equipment, fans, air curtains and hoods.

Technical parameters:

  • sensorless vector control for all motor types;
  • integrated PI controller;
  • IP20 and IP66 protection;
  • power range from 0.37 – 37kW, 110V – 480V;

The main advantages of Optidrive E3:

  • additional motor protection and energy saving;
  • speed regulation in a selected range;
  • convenient mounting both on a flat surface and on a DIN rail;
  • fast and understandable setting of parameters;
  • available models with IP20 and IP66;
  • it is possible to connect a Bluetooth adapter to perform overclocking with the phone.


If you need other energy-efficient Invertek Drives frequency converters or accessories, contact the specialists of ZTF Lāsma, who will help you find the most suitable and economically advantageous solution. We are here to support!


Other articles and videos about Optidrive E3: