Пікірлер

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  @shuanggp834017 сағат бұрын

  Hi，come China?

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  @JorgeSilva-em8pf2 күн бұрын

  Dear M.Alonso. Does your Qspice can do the Schematics convertion from Netlist as in this video? -> kzread.info/dash/bejne/enh7y5eFYsKZlpc.html

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  @MarcosAlonsoElectronicsКүн бұрын

  Hello, thanks for your question. This functionality of Qspice does not work for subcircuits. They will be shown as text.

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  @JorgeSilva-em8pfКүн бұрын

  @@MarcosAlonsoElectronics Thanks, now I know how to use. It raise one very interesting application of extract the schematics from a netlist; even something so primitive, because some models are almost useless because tons of convergence problems, in this case we are willing to fix it. Or, sometimes, it turns better to assemble the circuit and not to simulate.

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  @MarcosAlonsoElectronics3 күн бұрын

  A whole building makes a nice screen ...

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  @mahitvirma3 күн бұрын

  Cool ❤

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  @MarcosAlonsoElectronics3 күн бұрын

  Thanks!

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  @biswajit6817 күн бұрын

  Hi sir when is your new video coming

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  @MarcosAlonsoElectronics6 күн бұрын

  I hope soon, thanks!

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  @celiaalonso35458 күн бұрын

  Wow crazy…is amazing

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  @MarcosAlonsoElectronics8 күн бұрын

  Thanks!

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  @MarcosAlonsoElectronics8 күн бұрын

  Hundreds of LEDs make big screens!

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  @samet4289 күн бұрын

  What a wonderful video!

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  @MarcosAlonsoElectronics9 күн бұрын

  Thank you!

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  @Nussknacker-fx10 күн бұрын

  Hello Professor Alonso, I'd like to ask why do we need C1 here, is it for the DC Block? And R3 is used to adjust the DC current? I'm still a layman of analog circuit, so thanks a lot for your videos 👍and looking forward to your response!

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  @MarcosAlonsoElectronics3 күн бұрын

  Hello, good question. C1 is necessary to inject the AC signal of V4 without disturbing the DC operating point at "in". If you do not use C1 and connect V4 directly to "in" node you will have a short circuit between "in" and ground for the DC operation.

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  @petrusbosman426411 күн бұрын

  Thank you Professor, do you have an example that is implemented in the digital domain in Qspice for the anti windup circuit as in your video PE #65 , thank you very much.

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  @MarcosAlonsoElectronics10 күн бұрын

  Not yet, but this is a nice suggestion for a future video, thanks

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  @ilyasaslan701212 күн бұрын

  What should we do if we get a negative inductance value? In this case, T-model simulation is impossible?

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  @MarcosAlonsoElectronics3 күн бұрын

  Mathematically it should be OK to use negative inductances but LTspice does not like them. It won't converge. In this case it is better to use the other models. See video PE #32 for more info: kzread.info/dash/bejne/nYKY2JRwf7KYn5M.html

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  @JorgeSilva-em8pf15 күн бұрын

  Dera Sir. One sugestion: to explain the IC UCC3808/A and LM25037 and applications. And the type III controller/compensator.

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  @MarcosAlonsoElectronics12 күн бұрын

  Thanks for the suggestions. Video PE #64 is about type III or PID compensator.

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  @JorgeSilva-em8pf12 күн бұрын

  @@MarcosAlonsoElectronics Muito Obrigado.

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  @aliasgharakbari447815 күн бұрын

  thank you very much 🙏

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  @MarcosAlonsoElectronics12 күн бұрын

  Thanks!

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  @markg105118 күн бұрын

  Thank you Mr Alonso this looks really good, looking forword to properly trying these models out soon. Looks like lot of fun. I also hope that Mike will add the proper magnetic units so they show correctly on the graphs. Things like T(esla) instead of Volts etc. Cheers

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  @MarcosAlonsoElectronics17 күн бұрын

  Thanks!

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  @sayederfanfazeli115819 күн бұрын

  Thank you for sharing this.

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  @MarcosAlonsoElectronics18 күн бұрын

  Thanks for watching!

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  @klausziegler6020 күн бұрын

  This is the best explanation on how to use this software. It is very precise, very well explained in every respect. Wonderful job!

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  @MarcosAlonsoElectronics18 күн бұрын

  Thanks!

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  @celiaalonso354522 күн бұрын

  Can i ask you some questions in your next live? I need some help with my tesis

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  @MarcosAlonsoElectronics21 күн бұрын

  Of course, thank you!

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  @RaedMohsen22 күн бұрын

  Brilliant!

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  @MarcosAlonsoElectronics21 күн бұрын

  Thank you!

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  @petrusbosman426423 күн бұрын

  Thank you again Professor, I am using this topology to implement a solar charge controller with a digital control and an ESP32 microcontroller. I am glad to say that it works very well!

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  @MarcosAlonsoElectronics23 күн бұрын

  Congratulations and thank you very much for sharing your experience

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  @biswajit68123 күн бұрын

  Any plan to do live streaming in future?

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  @MarcosAlonsoElectronics23 күн бұрын

  Sure, there will be live streaming on this channel soon

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  @mahitvirma23 күн бұрын

  Great idea prof, looking forward to your future live streams ❤

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  @MarcosAlonsoElectronics21 күн бұрын

  Thanks!

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  @sabersaberi-r9s25 күн бұрын

  hello professor, excuse me i have one question, in this video, 200kHZ frequency, how you obtained it? in this controller, you did not determine how you put 200kHZ in this IC? IS THERE any video for calculation frequency according to controller?

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  @MarcosAlonsoElectronics24 күн бұрын

  Hello, thanks for your question. Frequency is usually a parameter selected by experience. It is not calculated. It depends on the topology, type of switching (ZVS, ZCS, hard switching, etc.), type of switches (MOSFET, IGBT, bipolar, etc.), power level, target efficiency, etc. Typical frequency range when using MOSFETs is 50 kHz to 200 kHz for hard switching. 100 kHz is the most common switching frequency.

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  @sabersaberi-r9s24 күн бұрын

  @@MarcosAlonsoElectronics thank you for giving these. can you send me your email? because I design a topology and I want to show you my circuit and know your idea thanks

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  @MarcosAlonsoElectronics24 күн бұрын

  @@sabersaberi-r9s My email is [email protected]

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  @sabersaberi-r9s24 күн бұрын

  @@MarcosAlonsoElectronics thank you so much professor

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  @sabersaberi-r9s25 күн бұрын

  hello professor, thank you for your useful informations, i have a question, for calculating duty cycle in PWM Controller, which video do you prefer? do you have any education about it?

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  @MarcosAlonsoElectronics25 күн бұрын

  hello, I am not sure what you mean by calculating duty cycle

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  @sabersaberi-r9s25 күн бұрын

  @@MarcosAlonsoElectronics please can you send me your email for sending you a image of what I mean duty cycle?

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  @sabersaberi-r9s25 күн бұрын

  hello Dr Alonso, i hope you are well, I have one question, we can use this current-mode controller in this video for a PFC Z SOURCE converter or Forward converter?

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  @sabersaberi-r9s25 күн бұрын

  i mean that which video in your page is suitable as a controller for a PFC converter and it work really well? which one? thank you

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  @MarcosAlonsoElectronics25 күн бұрын

  Videos PE#59 and PE#60 deal with critical mode PFC. Please, take a look

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  @MarcosAlonsoElectronics26 күн бұрын

  20:16 There is a mistake here. The correct relationship between DC values Vi and Vo is: Vo=Vi*D/(1+rL/R). So in the final transfer function instead of factor Vo/D it should be: (Vo/D)* (1+rL/R) or just keep Vi. The difference is very small though since usually rL << R

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  @MarcosAlonsoElectronics29 күн бұрын

  17:09 Another typo here. At the bottom of the slide the correct equation is wc=sqrt(12)*f as shown previously. Also: fc=wc/(2*pi)= 0.55*f. Sorry!

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  @MarcosAlonsoElectronics29 күн бұрын

  20:00 The factor 0.85 is used to have the same DC output voltage in the simplified model as in the complete model. However, I realized later that by doing this we were also changing the amplitude of the perturbation of the simplified model. It is better to separate the DC and AC parts. See how on the corrected file available on GitHub: github.com/marcosalonsoelectronics/PE-71

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  @MarcosAlonsoElectronics29 күн бұрын

  13:52 There is a typo in the last equation. Instead of exp(sT) it should be exp(-sT). Sorry!

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  @MarcosAlonsoElectronics29 күн бұрын

  All files are available here: github.com/marcosalonsoelectronics/PE-71

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  @thavakkodi629029 күн бұрын

  Sir great video as always . I am currently started working on Current control research for over current applications . Any materials ,tips to follow and authors to refer . information reg this would be helpful.😀

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  @MarcosAlonsoElectronics29 күн бұрын

  Thanks for your comment

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  @sabersaberi-r9sАй бұрын

  hello Dr Alonso, I have one question, we can use this 2 output PWM controller for Forward converter or boost converter? Do you have any PWM controller in your youtube page that should be suitable for Forward converter such as: UC3842 IC. please guide me

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  @MarcosAlonsoElectronics29 күн бұрын

  Hello, you can use the controller presented in this video: kzread.info/dash/bejne/aoBtppdppLW9n5c.html The model is available from my website

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  @sabersaberi-r9s25 күн бұрын

  @@MarcosAlonsoElectronics hello Dr Alonso, thank you, which video in your page is suitable as a controller for PFC converter? which one? thank you

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  @sabersaberi-r9sАй бұрын

  hello Dr Alonso, I have one question, we can use this 2 output PWM controller for Forward converter or boost converter?

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  @MarcosAlonsoElectronics29 күн бұрын

  Hello, you can use the controller presented in this video: kzread.info/dash/bejne/aoBtppdppLW9n5c.html The model is available from my website

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  @sabersaberi-r9s29 күн бұрын

  @@MarcosAlonsoElectronics thank you, Dr Alonso, I have one question, it means that we can use this 2 output PWM controller or kzread.info/dash/bejne/aoBtppdppLW9n5c.html for Forward converter ?

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  @MarcosAlonsoElectronics27 күн бұрын

  @@sabersaberi-r9s For the forward converter it is better to use the 1-output controller. The 2-output controller is intended for push-pull, half-bridge, etc.

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  @sabersaberi-r9s25 күн бұрын

  @@MarcosAlonsoElectronics thank you Dr Alonso, will this 1-output controller be suitable for PFC converter?

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  @user-pv6fs6rx9wАй бұрын

  Hello sir, this is my simulation. It contains a 3 phase closed loop inverter and a 3 phase closed loop rectifier. For the inverter it has been successful, but for the rectifier it has not been successful. I still can't solve it, sir.

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  @MarcosAlonsoElectronicsАй бұрын

  Hello, I will take a look to see if I can help

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  @user-eq8in2xw6yАй бұрын

  Would you recommend learning qspice or ltspice? For someone with now much knowledge on either

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  @MarcosAlonsoElectronicsАй бұрын

  I recommend Qspice, especially if you are interested in digital control

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  @user-pv6fs6rx9wАй бұрын

  Hello sir, can you make a tutorial for simulating a 3 phase active rectifier in QSpice? Thanks

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  @MarcosAlonsoElectronicsАй бұрын

  Hello, thanks for this interesting suggestion

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  @konstantinz6404Ай бұрын

  Every your video like a brilliant! Thanks for your work!

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  @MarcosAlonsoElectronicsАй бұрын

  Thank you!

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  @daitrinh8602Ай бұрын

  Thanks for the video. I downloaded the final model you provided, but however, the simulation stopped at a fatal error (Warning: Singular matrix. Check node D1 Fatal error: Timestep too small(1.25e-19) at t=4.51505e-14). Do you have any idea? I have added several resistors between nodes, such as D1 and D2, but the total simulation time is very long.

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  @MarcosAlonsoElectronicsАй бұрын

  The three files work fine on my computer. Download them again and do no make any change

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  @MishraKenhat-ju7jyАй бұрын

  Thanks for this excellent lesson, professor 👍

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  @MarcosAlonsoElectronicsАй бұрын

  Thanks!

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  @nrusinghabehera1984Ай бұрын

  ❤ from India

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  @MarcosAlonsoElectronicsАй бұрын

  Thanks!

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  @Aquio55Ай бұрын

  Hola Sr. Alonso. Tengo una duda respecto a este tema, el comportamiento de un circuito secuencial asíncronico además de depender de las señales de entrada en cualquier instante dado, depende de los estados de los elementos de memoria o del orden en el que cambian las entradas? Sus explicaciones son exelentes.

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  @MarcosAlonsoElectronicsАй бұрын

  Hola, gracias por su comentario. Sí, como se muestra en el esquema en 7:53, las salidas dependen del valor de las entradas y del valor de las variables internas o de estado del sistema. Se supone que las entradas van a cambiar de forma más lenta que el tiempo de respuesta del circuito. En otro caso, si las entradas cambian muy rápidamente, el sistema no tendría tiempo de responder y no funcionaría correctamente

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  @MarcosAlonsoElectronicsАй бұрын

  9:17 The green line is the loop gain: T(s)=C(s)*k_pwm*Gd(s)*H(s). I forgot adding k_pwm to the expression of T(s) in the slide.

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  @MarcosAlonsoElectronicsАй бұрын

  @MarcosAlonsoElectronics 1 year ago All files are available at: github.com/marcosalonsoelectronics/LTspice-19

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  @MarcosAlonsoElectronicsАй бұрын

  All files are available at: github.com/marcosalonsoelectronics/LTspice-18

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  @MarcosAlonsoElectronicsАй бұрын

  All files are available at: github.com/marcosalonsoelectronics/LTspice-17

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  @patrickliew2756Ай бұрын

  Hello Dr, why there is no +Vcc and -Vcc for the operational amplifier?

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  @MarcosAlonsoElectronicsАй бұрын

  Hello, in this case the limiting of the duty cycle is done at the optocoupler output. You can use an opamp with power supplies, there is no problem. It was done this way to make it simpler.

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  @patrickliew2756Ай бұрын

  Hello Dr, based on 14:09, the green line (loop gain) is the open loop transfer function of the system right ?

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  @MarcosAlonsoElectronicsАй бұрын

  The green line is the loop gain expressed as: T(s)=C(s)*k_pwm*Gd(s)*H(s)

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  @patrickliew2756Ай бұрын

  Hello Dr, based on 23:09, Why does the v(c) increase and why does the out current decrease even though the duty cycle increases?

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  @MarcosAlonsoElectronicsАй бұрын

  Hello, at the step instant the output voltage is 71.6 V approx. The lamp threshold voltage increases to 73.8 V very quickly. Because of Co the output voltage cannot change quickly so at the step instant the lamp current goes to zero (71.6 < 73.8, so the lamp diode blocks). The compensator "sees" the drop of the lamp current and reacts giving maximum output, which saturates at the limiting value of D=0.3. With this increase of the duty cycle the lamp current starts increasing, the compensator goes into linear operation again, and eventually the new steady state point is reached. A higher value of the average duty cycle is needed at the new operating point because the lamp voltage is now higher, so the converter output voltage has to be higher too.

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  @MarcosAlonsoElectronicsАй бұрын

  All files are available here: github.com/marcosalonsoelectronics/PE-69

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  @MarcosAlonsoElectronicsАй бұрын

  10:48 I have found that there is a mistake in the value of the flat gain between poles. The correct expression is the following: 20*log( (1+R3/R1)*R2/R3 ). Sorry about that!

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  @JorgeSilva-em8pf12 күн бұрын

  De qualquer forma, o vídeo é ótimo. A comparação PI contra PID na mesma simulação é bem didático. Sucesso.