Parallel RLC Circuit Example Problem
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- เผยแพร่เมื่อ 1 ต.ค. 2024
- This electronics video tutorial explains how to calculate the impedance, resonant frequency, and the electric current flowing the resistor, inductor, and capacitor in a parallel RLC circuit.
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Capacitive Reactance:
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Impedance:
• Impedance
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@@fighter1342 is it the one for it's wave function?
@@fighter1342 I don't actually get what you wrote tho but maybe u can chat me on somewhere else ,where u can send image and I understand wat u wrote down
Him saying he was running out of space, that long awkward silence as he was calculating it all, followed by the ‘whoops I made an error’, made me feel like I’m not an idiot. Thank you 🙏🏻
Thanks for making all of these wonderful videos; I really appreciate it. You’ve taught me so many things so succinctly that I’ll always think of you as a professor!
Me: So what about the current flowing through the capacitor?
JG: Now theres one more current flow we need to calculate and it's called Ic
Me: 6:00
clever
Me: BC
Loved the video. Do you mind making a video where you apply Kirchhoff's Voltage law for parallel AC circuits? Favorably RLC?
This is a confusing video, providing no insight into the matter. To understand what is going on, one needs to start at the beginning, namely from the voltages at the two ends of a resistor, of an inductor (coil), and of a capacitor. Without understanding how the electrical current (traversing that component) and the voltage (between the two ends of that component) are related, one cannot understand why the vector sum works, whereas the linear combination fails. The video starts from a formula for the total impedance and... seems to ascertain the validity of the vector sum for the electrical currents. In reality, one starts the other way 'round: from the electrical currents, convincing oneself that the vector sum needs to be applied, and determining the total impedance of the circuit. In any case, a formula is given for the electrical currents flowing through the three components and the total electrical current (around 7:50). Not surprisingly (to me), the tutor fails to address the question: what exactly are these bloody electrical currents? A physicist needs to start from the definitions (whereas, for many non-physicists/mathematicians, definitions appear to be a waste of time). It so happens that the electrical currents discussed in the video are NOT the INSTANTANEOUS electrical currents (obtained when one "freezes time" and "measures" the relevant values). The INSTANTANEOUS electrical currents ALWAYS fulfil the condition "Total electrical current is equal to the sum of electrical currents flowing through the three legs" or I(t)=I1(t)+I2(t)+I3(t). If this condition is violated, then electrical charge is created or destroyed at some nodes, which is, of course, utter nonsense. Treated in the video are the AMPLITUDES of the electrical currents, not their INSTANTANEOUS values. And, in order to understand that, one needs to understand first the PHASE DIFFERENCE between the currents I1, I2, and I3.
3:27 Z=60… tried 5ways in the calculator, are there any other ways to do this?
maybe tell us how to type it in the calc... thats literally the hardest part..
What if your professor wanted everything in phasor form
How to do phaser math??? TwT I haven't found a good video that really explains how to combine the complex numbers in phasers and finding the Zeq for multiple inductors, capacitors, and resistors combined in both series and parallel in a single circuit. It's the ones where you're combining 60
How I understood, the complex state variable method is a solution to your problem:
th-cam.com/video/_9Ew2LXPsWI/w-d-xo.html
it's literally just Pythagoras' theorem
There's a couple of things here I don't like here. For one the capacitive reactance should be negative. Two, you're completely ignoring the Phase component of you calculations. This is why when you add up the branch currents they don't equal Is. At 7:58 that doesn't really show that you solved the problem correctly. That just shows that KCL is satisfied. A good way to see if your answer is correct is to check if the the power balances out.
Your videos are amazing. I'm currently studying to become an electrician and your videos tie loose ends. Thanks!
yup
How is the formula for resonant frequency same as that of series rlc. circuit?
Both for series and parallel connections, the characteristic angular frequency omega0 (of the RLC circuit) is equal to the reciprocal of the square root of the product of the inductance (L) and the capacitance (C): omega0 = 1 / sqrt (LC). Many people prefer to use frequencies, rather than angular frequencies, which brings a factor 2 * pi into the formulae: omega0 = 2 * pi * f0.
please solve this
A 9 mH coil is in parallel with a 0.015 µF capacitor across an 18 kHz ac source. The coil's internal resistance is 60 ohm . The circuit impedance is ?
hi sir please teach me how you type those numbers in calculator, i cant get the exact answer on the total
impedance
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I’m going crazy, how do I do an RLC parallel with just VARSc VARSl, P, and IT
guys in parallel the capacitive reactive wont be WC rather than 1/WC ? cuz in series is 1/WC.
Algebraic calculators really stink trying calculate the impedance. Give me an RPN calculator any day.
YOUR MATH IS WRONG
Please help me with this one
a coil takes 15 a from a 250 v source. when a 20 resistor is connected across the coil, the combination draws a total current of 25 a. determine the resistance and the inductive reactance of the coil.
Martinez Christopher Harris George Jackson Jennifer
I don't quite understand how using the vector squared works in a real world physical sense. I mean it's great mathematically but how can the currents through the various elements be greater than the source current? Is it due to additional current being generated by the magnetic field of the inductor and the electric field of the capacitor? Also what exactly is the resonant frequency? Is it the frequency which can pass through both the inductor and capacitor and at which point the reactance is the same for both elements?
This video is very helpful for me because iam a student of iti as a electrician so thanx to you sir uploaded this beautiful video 🙏🙏🇮🇳
Tq so much for this!!!😇😇 now I understood this topic ...
Why don't you do Electronics?
omg wtf is going on , im soo interested want to learn but cant everytime i listen i feel so sleepy. coffee won't help, so regret sleeping in physics now that i need it all the time
One suggestion is to watch the video like you did before except this time you turn the volume down to zero(no sound) and turn the subtitle on.
parallel fr u lied
Thanks! i got confused
why does no one use complex math to calculate these? add 88.42 dms 90 30.16 dms -90 plus 60 dms 0 whatever their respective currents are and then you get your It
I kept getting 58.32ohms as the impedance.
Help 🥺
I kept getting 58 ohms as well.
Calculate them individually first, and then put it in the eqn..! You will get it correctly!
So can i write impedence to be z = 1/✓((1/r)^2 + (wC-l/lw)^2) where w is the omega for the sinusodial current?
You are the real mvp for taking the time to make these videos to help a 37 year old like myself fresh up on these things. thank you brotha!!
I plugged your RLC impedance values into 3 RLC parallel calculators and they all gave me different answers--so counting yours, I got 4 completely different answers (and they're not even remotely close to each other) for the total impedance in this RLC circuit.
why is he not using complex numbers for the impedances? I thought the impedance was supposed to be: Z=R+jwL or Z=R+jwC?
He actually made a new video on RLC ❣️❣️
I am done with the exams though
Also check out this video on Current and the Conduction process th-cam.com/video/REsWdd76qxc/w-d-xo.html
when current lags the voltage,does it mean it flows in the reverse direction to the one taken in the circuit.
How to calculate power factor in this circuit ?
This is another Leonardo Da Vinci
How would this change when the 12V/60Hz source has a 50 Ohm impedance?
What about series parallel RLC circuit .
Don't you have?
in parallel ckt net impedence is always less than the minimum among all components individual impedences. but you got 36 as net impedence when an element having 30 impedence i spresent already there answer should be less than 30.
I assume both equations here for Zs and Is wouldn’t work for a circuit with Resistor, dirty coils and a pure capacitor?
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can anyone explain why when adding the currents, you get the wrong answer? why do you have to subtract the currents going through the capacitor and inductor?
Thank you ❤
Nice
Am learning in 2024🎉
In the beginning for impedance your math is wrong at the end.
Best in the world 😂
But from where does the formula for Z comes?
You can set up an impedance triangle using R for the bottom leg, XL-XC for the other leg, and Z will be your hypotenuse. These values will all be reciprocals for parallel circuits, mind you.
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this is very helpful, but my problem is i have 2 capacitors and i assume i need to combine them? i have to plot the frequecy and current. Any tips for this please ? i would think i need to get the total for c so i can use the resonance freq formula
How to find the phase difference between the net current and source voltage in parallel lcr circuit....????
Please can you do a video on fractions word problems?
Thank you
Thank you
thanks man
Thanks for your video😊
What happens when there is another resistor in parallel or series between inductors or capacitors? What do you take as R? or does this only apply to 1 resistor?
Then take equivalent resistance of both ...
Can anyone tell about the j notation from where it comes? How to solve that?
j will represent your imaginary numbers. In this case, when using a current/impedance/power triangle to solve for unknowns, j will equal the total reactance for said triangle. (I through L or C for current triangle, remaining/total reactance for the impedance triangle, and VARs total for power triangle)
So if you have 60 ohms XL and 30 ohms XC, your total or X is 30 ohms and it is considered more inductive. With these values, and the use of an impedance triangle, AND a calculator capable of imaginary numbers functions, you can plug in 30 (for your 'real' ohms, the resistance) + 30 j (for the 30 remaining 'imaginary' ohms, this would be - for a circuit that is more capacitive) and the result, if you are in polar form (r theta appears in top left on my calculator) will be your hypotenuse for this triangle, which is Z or total impedance. You can then use another function on the calculator to give you the angle for this triangle, and that angle will be the SAME for all three triangles, greatly simplifying the rest of the calculations. (the angle will also be - if the circuit is more capacitive)
I hope this helps someone, because complex numbers make a lot of these calculations very trivial.
Thank you video, please tell me how can i calculate power factor for this circuit
Power factor = R/z
Can u plz tell me the derivation of the impedance of tha parallel LCR circuit ?plzz
Thanks for making this video, really appreciate it!
cos Phi = R/Z or Z/R which is true?
It's R/z
Thank you ❤
Very nicely explained
Z=R=60Ω (ringing status)
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Why u dont use index number?
We appreciate thank you
So how do i get the Vout?
you have no idea how much youve helped me.my teacher is trash. thankyou for the vid
I have L n R in series n parallel with C
would that Zt equation work if i want Zt in polar form???
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thanks Sir
Thank you so much
thank you sir
plz also make a video for series rlc circuit by the way thanks for this informative video.
thank you so much sir! highly appreciated.
Pls make a video tutor for source free RLC circuits.
could you please also explain (or kindly point to other resources) how would we find the impedance if, say a resistance, was added in series to an LCR parallel combination, and how current would be divided.
The impedance can be calculated from here, and then we can get the phase difference, after than we can use the phasor diagram to find the net impedance
Can you do this finding voltage given a current source please?
Thank you so much
Helped a lot thanks much sir
Thankyou sir
What do you do with a parallel rlc circuit which had resistors on each branch?
You are doing grear work here
thank you for all that you do and I really love your videos