- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
I have a doubt in 3.3kW PFC stage in the given Infineon code for 3.3kW PFC demo board. The VIN AC RMS voltage is calculation is done by using a digital filter . The Vin sensed ADC reading is sampled at 30kHz. The digital filter function is called every 2.5kHz. The output of filter is considered as average AC voltage . This average voltage is multiplied with 1.111 to get RMS AC voltage. I want to know the cutoff frequency and type of filter used.
Below the equation used in code for filter. g_U_in is the ADC reading for Vin Ac sense.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Rakesh,
Sorry for the delay in responding. The equations you refer to are the back-to-back low pass filters. The filter factor used (ZK_UIN = T0/T = 1041) is defined in defines.h
http://techteach.no/simview/lowpass_filter/doc/filter_algorithm.pdf you can refer to this.
Pranava
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
Can you please share the source code you are referring to?
Pranava
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
Please provide a solution soon.
Regards
RAKESH
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Rakesh,
Sorry for the delay in responding. The equations you refer to are the back-to-back low pass filters. The filter factor used (ZK_UIN = T0/T = 1041) is defined in defines.h
http://techteach.no/simview/lowpass_filter/doc/filter_algorithm.pdf you can refer to this.
Pranava