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300 Hz modulation and his path

300 Hz modulation and his path

(OP)
Hi Guys,
i have something i want to share and discuss with you.
I live in Italy so frequency line is 50 Hz.
In a DC motor with 6 IGBT rectifire the 300 Hz frequency is characteristic.
Anyway it is possible to find some other component related. Below there is a list of:
  1. Harmonics until to 4th harmonic (often 600Hz)
  1. 1X motor speed modulation around 300Hz and harmonics
  1. 50 or 100 Hz modulation around 300Hz and harmonics
  1. modulation around 300hz at driven machine and or some "strange" (not identified)components
All of above are some spectrum path normally i found especially in a paper mill and i solved in conjunction with electric staff onsite.

I want to know your experiences and share togheter

thanks

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