Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Measuring ripple current at various frequencies in Boost PFC Output cap?

Status
Not open for further replies.
C

cupoftea

Advanced Member level 5
Joined
Jun 13, 2021
Messages
2,639
Helped
54
Reputation
108
Reaction score
116
Trophy points
63
Activity points
13,852
Hi,
Would you agree that in the attached (60kHz fsw) Boost PFC simulation in LTspice....(jpeg scm also)
The 100Hz ripple current in Cout is 2Arms
The >60kHz ripple in Cout is 2.62Arms
The Total ripple current in Cout is 3.3Arms (this ones obvious as you just CTRL-LeftClick Cout to get it)

Do you agree that the filters shown separate to the Boost PFC cct are correct ways of stripping out these current measurements?
 

Attachments

  • LT1248 Boost PFC 1000W 230vac____100Hz ripple in cout _forum.zip
    2.5 KB · Views: 101
  • Ripple currents at different frequencies in Cout of Boost PFC.jpg
    Ripple currents at different frequencies in Cout of Boost PFC.jpg
    135.4 KB · Views: 120

Sort by date Sort by votes
Hi,

I havn't run your simulation, but have you tried to perform a FFT? This can be done in LTspice with no effort (build in), and would show the contributers across the complete frequency band of question.

BR
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top