All About Circuits Forum  

Go Back   All About Circuits Forum > Electronics Forums > Homework Help


Homework Help Stuck on a textbook question or coursework? Cramming for a test and need help understanding something? Post your questions and attempts here and let others help.

Reply   Post New Thread
Thread Tools Display Modes
Old 01-29-2009, 06:36 PM
Percent_Impedance Percent_Impedance is offline
New Member
Join Date: May 2008
Posts: 3
Default Buck Boost Converter analysis


Well I started my MSEE and my first class is power electronics. We have a buck boost converter which I have to perform steady state analysis and perform a DC design.I have attached it as a Pdf including two more pdf's which have the slope waveform sketched and the calculations. I derived the current slope accross the inductor, ripple current, and the inductor value! The problem is I do not know If my calculations are right or wrong!

If anyone can help me in this I would greatly appreciate it.

My answers on the attached Pdf are for 2.1 (a) (b) (c).

Ill explain real quick the way I see it! when the circuit is in steady state the voltage and current balance to zero. ok, now the current slope accross the inductor is the Vout/RL which is -20/4ohm = 5amps (+-)...

Now my slope equations follow this as you will see. Now since I want to reduce the current ripple to 10% and therfore I need to calculate a value of inductance to conform to this I took 10% of 5 Amps and got 0.5 ...

Ok now, when I put it in my inductance formula i get 500uH

P.S. Im not worried about getting the answers! I rather want explanations on how to look at the circuit and what im doing wrong. If you can also tell me if my values are right or wrong that would be very benefitial. Thank you in advance!!!
Attached Files
File Type: pdf 2.1 (c).pdf (85.0 KB, 341 views)
File Type: pdf homework.pdf (76.5 KB, 246 views)
File Type: pdf 2.1 waveform.pdf (59.6 KB, 215 views)
Reply With Quote
Old 02-12-2009, 03:19 PM
Gifty Gifty is offline
New Member
Join Date: Feb 2009
Posts: 1
Default buck booster

hai...i'm currently doing Engineering.i hav to submit a project on buck booster... can u pls provide info abt it
Reply With Quote
Old 05-26-2009, 07:41 PM
booboojerkers booboojerkers is offline
New Member
Join Date: May 2009
Posts: 1
Default Erickson Book solution

I was wondering if you have obtained the answer to the problem posted above or if you have any other answers to problems in the same book. I am studying from the same book on my own and could use some extra help.

Reply With Quote
Reply   Post New Thread

, , ,

Related Site Pages
Section Title
Worksheet Calculus for electric circuits
Worksheet Power conversion circuits
Worksheet Basic AC-DC power supplies
Worksheet Resonance
Worksheet Inductive reactance
Worksheet Inductance
Textbook Resonant filters : Filters
Textbook Low-pass filters : Filters
Textbook AC inductor circuits : Reactance And Impedance -- Inductive
Textbook Series resistor-inductor circuits : Reactance And Impedance -- Inductive

Similar Threads
Thread Thread Starter Forum Replies Last Post
dc to dc buck converter ?? mobile_bob General Electronics Chat 7 05-27-2009 06:59 AM
me too ....dc to dc buck converter doubts.. chandana16 General Electronics Chat 4 12-01-2008 07:46 PM
Questions about SMPS - buck converter. Pls help. msoof General Electronics Chat 0 07-21-2008 03:28 AM
Boost Converter Control using TL494 xhatemx The Projects Forum 3 04-30-2008 05:32 PM
uC Controlling Boost Converter espire Embedded Systems and Microcontrollers 25 12-29-2007 06:06 PM

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 02:52 PM.

User-posted content, unless source quoted, is licensed under a Creative Commons Public Domain License.
Powered by vBulletin
Copyright ©2000 - 2014, vBulletin Solutions, Inc.