Electronics Forums > What is electrical resonance ?

# What is electrical resonance ?

ABF
Guest
Posts: n/a

 04-08-2005, 10:48 AM

> Resonances need not be just physical movement, its normal to have
> electrical and even thermal resonances under the appropriate conditions.
>

a) What exactly is electrical resonance and how is it caused and what is
it's result/effect?
b) What exactly is thermal resonance and how is it caused and what is it's
result/effect?

Thanks
Anton

Gerald Newton
Guest
Posts: n/a

 04-09-2005, 07:30 PM

"Repeating Rifle" <(E-Mail Removed)> wrote in message
news:BE7C5093.37544%(E-Mail Removed)...
> in article (E-Mail Removed), (E-Mail Removed) at
> (E-Mail Removed) wrote on 4/8/05 8:47 AM:
>
>> | b) What exactly is thermal resonance and how is it caused and what is
>> it's
>> | result/effect?
>>
>> I would presume it to be a thermal change propogating and returning, then
>> repeating that process.

>
> There is no such thing. To make a long story short, there is nothing
> equivalent to thermal inductance.
>
> Bill

If we had a heat powered refrigerator operating with its evaporator
discharging heat into the refrigerator and into the unit that vaporizes the
refrigerant operating in balance, wouldn't this be thermal resonance?

TimPerry
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Posts: n/a

 04-10-2005, 04:03 AM

"ABF" <(E-Mail Removed)> wrote in message
news:d35nie\$lid\$(E-Mail Removed)...
>
> > Resonances need not be just physical movement, its normal to have
> > electrical and even thermal resonances under the appropriate conditions.
> >

>
> a) What exactly is electrical resonance and how is it caused and what is
> it's result/effect?

A state in which the capacitance and the inductance values in a circuit are
equal (net reactance is equal to zero) and the only quantity left is
resistance.

research series resonant and parallel resonant (tank) circuits.

the result/effect is a tuned circuit.

> b) What exactly is thermal resonance and how is it caused and what is it's
> result/effect?
>

beats me try alt.engineering.mechanical

> Thanks
> Anton
>
>

Gerald Newton
Guest
Posts: n/a

 04-10-2005, 10:20 PM

"ABF" <(E-Mail Removed)> wrote in message
news:d35nie\$lid\$(E-Mail Removed)...
>
>> Resonances need not be just physical movement, its normal to have
>> electrical and even thermal resonances under the appropriate conditions.
>>

>
> a) What exactly is electrical resonance and how is it caused and what is
> it's result/effect?
> b) What exactly is thermal resonance and how is it caused and what is it's
> result/effect?
>
> Thanks
> Anton
>

The way I learned this was:
When XC = XL in a parallel LC circuit we have resonance and current travels
back and forth between a capacitor and an inductor. This circuit has
minimum impedance to a wave traveling at a resonance frequency found by:
XC = 1 / 2 x pi x freq in hz x C in farads
XL = 2 x pi x freq in hz x L in henries
Set XL equal to XC and solve for the resonance frequency.

f = 1 / (2 x pi x SQRT(LxC)

It is all explained in detail at: