RLC Discharge Time

3 comments

Rate

litses Participant Join Date: Feb 2008 Posts: 3	RLC Discharge Time 02/04/2008 5:43 AM
	how can i calculate the discharge time of an RLC circuit?
	Register to Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Electroman Guru Join Date: Jul 2006 Location: Dunstable, England Posts: 2821 Good Answers: 45	#1 Re: RLC discharge time 02/04/2008 8:01 AM
	I think we are going to need a bit more information than that. What is the circuit layout etc... John. __________________ A little knowledge is a dangerous thing - Googling is far worse!
	Register to Reply Score 1 for Good Answer

litses Participant Join Date: Feb 2008 Posts: 3	#2 In reply to #1 Re: RLC discharge time 02/04/2008 10:00 AM
	it is a typical Capacitor discharge through a L and a R in series.
	Register to Reply

Electroman Guru Join Date: Jul 2006 Location: Dunstable, England Posts: 2821 Good Answers: 45	#3 In reply to #2 Re: RLC discharge time 02/04/2008 10:23 AM
	Hmmmmm trickey... You basically have 2 time constants at work here, assuming the capacitor is charged and the inductor is open circuit with no emf present when the 'switch' is closed to form a discharge path from the capacitor through the R and L.... The L & C will form a time constant at a particular frequency with a period of: τ = 2∏ f √(L x C) The second time constant is formed from the C and R and is exponential. The resulting waveform will be an exponentially decaying sine wave with a period of roughly τ... Hope this helps, I've skipped a lot of calculations as sometimes a guesstimate is adequate. John. __________________ A little knowledge is a dangerous thing - Googling is far worse!
	Register to Reply

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (74 right now) Show Members