LTspice tutorial - Measuring AC Power Factor

[@carlosivanrp]

This is the best KZbin channel to learn LTSpice. Definitely...

[@FesZElectronics]

Happy to hear that! Thank you!

[@tiagomello]

Indeed

[@mzshmkn]

oh my god im so glad i discovered this channel now. finally found a good channel to learn more about LTSpice!

[@PetreRodan]

very nicely made tutorial. and thanks for providing the simulation file!

[@FoolhardyEngineer]

I'm glad I found this channel. Very good explanations.

[@placiduzzu]

Very precise and concise - to my opinion best ltspice resource channel. Constantin Budeanu was a forerunner talking about deforming power and his thesis have just been proven by your little nice experiment.

[@FesZElectronics]

@placiduzzu Thank you for the kind words! I was not aware of Constantin Budeanu's work on this topic; thank you for pointing it out!

[@vipinpnair]

Total Power Factor = Active Power/(Vrms*Irms); This method looks to be easy for calculating PF even for cases like distortion and displacement factors are present.

[@mehboob927]

Nicer ways of explanation. Really helpful especially for new users of LtSpice. Thanks a lot

[@dancoz5477]

Bravo. Bien fait. Simplement expliqué pour un simple circuit LC mais rempli d'info. Je viens d'aprendre un nouveau concepte.

[@lilybrady5635]

u saved me bro have been trying to use ltspice for 3 hours

[@abdelazeemhassan3701]

Amazing as usual

[@avinashdubey3534]

Very informative tutorial explained in simple but in effective way..thank you very much.

[@cyberphox1]

Excellent video

[@AJ-et3vf]

Great video! Thank you!

[@mortenlund1418]

Thanks for this also great ltspice tutorial. You are great.

[@sheetalmekhale]

Nicely explained , Can it be done for three phase way and Delta, A video of the same would be an excellent compliment to this Single phase video

[@wilmdrdo1228]

Mind blowing.

[@bobyschnackler6914]

I was looking for this! Nice video thank you!

[@TheFoskon]

It would be nice if you made a video about three phase circuits in LTspice. I have found only one video about it in youtube and it has really not much information, only how to simulate a delta source. Things like the power factor and THD in non linear loads is something quite tricky, also when trying to simulate real world measurements such as with two, three wattmeters methods. I am simulating in LTspice for example a three phase inverter fed by diode bridge and transformer, and need to measure power factor, displacement factor and so on, the transformer until now is the most complicated. P.S: Just a suggestion for a future video, greetings from Brazil.

[@hardevermind]

Thank you for your video! It's very usefull!

[@elwood.downey]

I'm glad I can stop the video :-) Many thanks.

[@zeeshanshafiq2401]

Hay can you make a video on inductor, using in wireless power transfer,,,,, your series of video is very good

[@michaele380]

Thanks for the great video, I learned more about how to use meas. However, I don't understand the mod function at all, unfortunately I couldn't find anything in LT Help and on the web. Do you have a tip for me?

[@MrEsendere]

Your LTspice video library is really wonderful. But how about SiC MOSFET's? Do you mind if you simulate SiC MOSFET circuit on LTspice? Some companies such as Cree has given their SiC MOSFET LTsice models. If you simulate them you will both enlarge your library and teach us also an unknown thing and help me my problems. Thank you a lot...

[@insistance1000]

Hi FesZ, very good vedio, as always, but one question "is it the right way to derive the real and imaginary part?"

[@FesZElectronics]

Well the major advantage of that method is that it will filter out any noise - it let's you analyze the phase and gain of a clearly defined signal frequency.

[@insistance1000]

@@FesZElectronics but I think rms value should be used for power calculation instead of average value.

[@miguelsbpgj]

@@insistance1000 There’s no such thing as RMS Power

[@hispaniola1684]

Could we have just added 360 degrees to the phase shift, without the extra math? Seems to me we would have arrived at the 59 degrees much quicker that way.

[@jurajmarek9175]

Thanks for nice video. However, isn't it faster to get phase and powers just to perform .ac with amplitude = Vrms and then to plot impedance to get phase, and V*I, re(V*I), and Im(V*I)?

[@FesZElectronics]

The issue with .ac simulations is that they are performed as small signal analysis around the operating point. If your circuit is purely passive (inductors/capacitors/resistors) it will work; but once you add active non linear components - like diodes, the simulation will not take into account the switching (conduction/non-conduction) behavior.

[@KamleshGadhvana]

v good

[@tanishqkale5215]

Questionable use of curly braces in "v3 supply 0 sine(0 325.27 {frq} 0 0 0 10)" Error: undefined symbol in: "[frq]"

[@FesZElectronics]

One of the first statements that is present in all my simulations is ".param frq 50"; maybe this is missing

[@tanishqkale5215]

@@FesZElectronics Thankyou! I realized my mistake. instead of SPICE directive, i chose the comment option.

[@FesZElectronics]

In case you did not alter the default settings, this will cause the text to appear blue. So a spice directive is black and a comment is blue. That might make this more obvious in the future.

[@tanishqkale5215]

@@FesZElectronics Thanks a lot! I wish if you were my Prof.

[@simonmackie8258]

Hi there, I am trying to find pf, P, Q, S on my underground cable simulation. Can you assist? Many thanks

[@kajalgandhi1428]

Hello sir, Can you please help me out with this question. After how many days power factor gets corrected by using capacitor?

[@FesZElectronics]

Well, the effect should be instantaneous; its not time dependent.

[@kajalgandhi1428]

@@FesZElectronics Okay, Thank you sir

[@kavyakunda8509]

How to write that code in ltspice

[@sarthaksonagara1011]

I want to measure phase difference of 2 voltage waveform but my last 4 .meas are not working please give me suggestion, I am getting amplitudes but it is showing measurement T1 FAIL ed

[@FesZElectronics]

Maybe you can show us the exact .meas statement you used?

[@sarthaksonagara1011]

.param frq 100 .meas inm MAX v(n003) .meas om MAX v(Vo) .meas T1 FIND time WHEN v(Vo)=om .meas T2 FIND time WHEN v(n003)=inm .meas dT param T1-T2 .meas PhaseLin param 360*dT*frq I have simple inverting amplifier circuit which have capacitor in parallel to input resistance. I want to find gain magnitude and phase. v(n003) is input voltage source and frq is its frequency in Hz. v(Vo) is output voltage. I want to find phase difference of input and output voltage waveforms. First 2 .meas are giving correct value but rest are showing FAILed.

[@sarthaksonagara1011]

@@FesZElectronics .param frq 100 .meas inm MAX v(n003) .meas om MAX v(Vo) .meas T1 FIND time WHEN v(Vo)=om .meas T2 FIND time WHEN v(n003)=inm .meas dT param T1-T2 .meas PhaseLin param 360*dT*frq I have simple inverting amplifier circuit which have capacitor in parallel to input resistance. I want to find gain magnitude and phase. v(n003) is input voltage source and frq is its frequency in Hz. v(Vo) is output voltage. I want to find phase difference of input and output voltage waveforms. First 2 .meas are giving correct value but rest are showing FAILed.

[@FesZElectronics]

Ha! The problem is not the syntax. In my videos I used the extra command ".options plotwinsize=0"; this means that LT will not compress the data of the signal points. By default, to save memory, the data points are compressed and this is affecting the measurement statements. Let me know if this works on your side.

[@sarthaksonagara1011]

@@FesZElectronics YESSSSS! it is working, Thank you so much, It will save my time.

[@acierinoxydable6287]

kaneis apo ceid?