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: [ol 1] Harmonics until to 4th harmonic (often 600Hz) [/ol] [ol 2] 1X motor speed modulation around 300Hz and harmonics [/ol] [ol 3] 50 or 100 Hz modulation around 300Hz and harmonics [/ol] [ol 4] modulation around 300hz at driven machine and or some "strange" (not identified)components [/ol] 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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300 Hz modulation and his path

Thread starter Sofistioelevib
Start date May 9, 2017

Status: Not open for further replies.

May 9, 2017

Sofistioelevib

Industrial

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:
[ol 1]
[li]Harmonics until to 4th harmonic (often 600Hz)[/li]
[/ol]
[ol 2]
[li]1X motor speed modulation around 300Hz and harmonics[/li]
[/ol]
[ol 3]
[li]50 or 100 Hz modulation around 300Hz and harmonics[/li]
[/ol]
[ol 4]
[li]modulation around 300hz at driven machine and or some "strange" (not identified)components[/li]
[/ol]

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