The overheating of the frequency converter is mainly due to internal losses, of which the main circuit losses account for about 98% of the total losses, and the control circuit losses account for 2%. When the frequency converter is working, the magnetic field generated by the high-order harmonics will cause electromagnetic vibration to the mechanical parts, and the vibration frequency may coincide with the natural frequency of the mechanical parts, resulting in resonance.
Causes of motor overheating
The overheating of the frequency converter is mainly due to internal losses, of which the main circuit losses account for about 98% of the total losses, and the control circuit losses account for 2%.
Electromagnetic vibration impact
When the frequency converter is working, the magnetic field generated by the high-order harmonics will cause electromagnetic vibration to the mechanical parts. The vibration frequency may coincide with the natural frequency of the mechanical parts, resulting in resonance.
Methods to reduce vibration
The method of reducing vibration is to absorb the high-order harmonic current component by setting up an AC inductor, thus reducing vibration.