Jack always wanted the input of the VCVS to be 1 volts. In the example that I used in the video, the output of the supply is suppose to be 12V, the gain is then Again=12V/1V=12. Another example, if your supply is 5V, then you set the gain to 5. I hope this answer your question. May you have happy simulations ;-) Robert Bolanos
Hi Dian, 40kv is a high voltage. In winding a flyback, you want to keep the secondary on the flyback under 600 volts. To get to 40kv you would need to use a long series of voltage multipliers. You might be able to go up to 1000 volts and use a 40 stage multiplier to get to 40kv. Email me at rbola35618@aol.com and I can give you more details.
I really appreciate your video,, Thank you...It,s really help me to finish my project on flyback. I have been designing flyback driver to generate high voltage up to 40kV. Do you have some idea how to deal with high voltage flyback, maybe some trick to reach 40kV HV,,
Hi Robert, thanks a lot for great video that you made. I'm learning bode for smps but I can't simulate bode plot in orcad pspice, I try few ways but none of them came right. If you was doing something like that on pspice, could you please give me some idea on how to simulate bode plot? Many thanks for your great help sir,
Hi Anh, if you email me at rbola35618@aol.com, I can send you the TopSPICE files and you can download the demo version of Topspice and be able to run the files. Regards, Robert
Robert Bolanos many thanks for your help. I will email you soon. I'm really newbie on this industry, I try to learn as much as I can but struggle with bode simulate, I used orcad pspice for time domain and it work but for bode plot, really my nightmare since I tried some ways but none work. And I have my last shot but not try yet. if still not work better I should change to any softwares that could help. Thanks a lot, sir. ☺
It is a divider network and does not effect the circuit too much. In fact you can leave it out and you can connect directly. Sometime the simulator will complaint that there is no DC return path so you may need to place a large value resistor. That is why the 100K resistor so the simulator would run correctly.
Hi Robert, Just a quick question. Suppose that we have a VCVS and the output filter compises of a diode bridge and a capacitor (there is no inductor) so the cap with it's ESR and the Rout form a first order circuit with a pole and a zero. I suppose that type II compensetion is what is needed here to eliminate the pole and the zero. I'm I right?
VSVS implies that you are using voltage mode control and the inductor effects the output transfer function; it becomes a 2nd order system (LCR). Of you are using VCCS then you have current mode and you have a 1st order system (RC). If you are using a voltage mode control, then you will need to use a type 3 compensator while current mode only need a type 2 compensator. I hope this answers your question.
I get what you're saying, but what if have a VCVS and you actually DO NOT have an inductor at the output filter at all (not just ignoring it's effect, as we do in VCCS...), then the output has to be a first order filter, thus a type II is sufficient, even though we have a VCVS system...
That would be correct. Just keep in mind, that I think the inductance of the transformer would affect the circuit. For example, a flyback does not have an output inductor, but if you operate it in voltage mode, then the inductance of the primary comes into play and will become an inductor. Let me make some simulation to double check what I am writing here. RB
Yes, I did some simulation and I am correct. In a flyback, there is not output inductor but if you use voltage mode, then the resonant frenquency of the output filter will be Fre=1/(2*pie*sqrt(Lpri*Co))
Jack always wanted the input of the VCVS to be 1 volts. In the example that I used in the video, the output of the supply is suppose to be 12V, the gain is then Again=12V/1V=12. Another example, if your supply is 5V, then you set the gain to 5. I hope this answer your question. May you have happy simulations ;-) Robert Bolanos
Jack always wanted the input of the VCVS to be 1 volts. In the example that I used in the video, the output of the supply is suppose to be 12V, the gain is then Again=12V/1V=12. Another example, if your supply is 5V, then you set the gain to 5. I hope this answer your question.
May you have happy simulations ;-)
Robert Bolanos
Robert,
It is a great video. In your AC simulation, how is the value of VCVS which is "12" calculated in your voltage mode flyback? Thank you.
Sir how we can find the components values for compensator circuit?
Hi Dian,
40kv is a high voltage. In winding a flyback, you want to keep the secondary on the flyback under 600 volts. To get to 40kv you would need to use a long series of voltage multipliers. You might be able to go up to 1000 volts and use a 40 stage multiplier to get to 40kv. Email me at rbola35618@aol.com and I can give you more details.
I really appreciate your video,, Thank you...It,s really help me to finish my project on flyback. I have been designing flyback driver to generate high voltage up to 40kV. Do you have some idea how to deal with high voltage flyback, maybe some trick to reach 40kV HV,,
Hi Robert, thanks a lot for great video that you made. I'm learning bode for smps but I can't simulate bode plot in orcad pspice, I try few ways but none of them came right. If you was doing something like that on pspice, could you please give me some idea on how to simulate bode plot? Many thanks for your great help sir,
Hi Anh, if you email me at rbola35618@aol.com, I can send you the TopSPICE files and you can download the demo version of Topspice and be able to run the files. Regards, Robert
Robert Bolanos many thanks for your help. I will email you soon. I'm really newbie on this industry, I try to learn as much as I can but struggle with bode simulate, I used orcad pspice for time domain and it work but for bode plot, really my nightmare since I tried some ways but none work. And I have my last shot but not try yet. if still not work better I should change to any softwares that could help. Thanks a lot, sir. ☺
Hello Sir Why we used R13 and R14 resistors 2k and 100k? Thank you...
It is a divider network and does not effect the circuit too much. In fact you can leave it out and you can connect directly. Sometime the simulator will complaint that there is no DC return path so you may need to place a large value resistor. That is why the 100K resistor so the simulator would run correctly.
@@RobertBolanos thanks sir for answer.
Hi Robert, Just a quick question. Suppose that we have a VCVS and the output filter compises of a diode bridge and a capacitor (there is no inductor) so the cap with it's ESR and the Rout form a first order circuit with a pole and a zero. I suppose that type II compensetion is what is needed here to eliminate the pole and the zero. I'm I right?
VSVS implies that you are using voltage mode control and the inductor effects the output transfer function; it becomes a 2nd order system (LCR). Of you are using VCCS then you have current mode and you have a 1st order system (RC). If you are using a voltage mode control, then you will need to use a type 3 compensator while current mode only need a type 2 compensator. I hope this answers your question.
I get what you're saying, but what if have a VCVS and you actually DO NOT have an inductor at the output filter at all (not just ignoring it's effect, as we do in VCCS...), then the output has to be a first order filter, thus a type II is sufficient, even though we have a VCVS system...
That would be correct. Just keep in mind, that I think the inductance of the transformer would affect the circuit. For example, a flyback does not have an output inductor, but if you operate it in voltage mode, then the inductance of the primary comes into play and will become an inductor. Let me make some simulation to double check what I am writing here. RB
Yes, I did some simulation and I am correct. In a flyback, there is not output inductor but if you use voltage mode, then the resonant frenquency of the output filter will be Fre=1/(2*pie*sqrt(Lpri*Co))
ok I see. . anyway thats a lot for your time , I appreciate it !
Jack always wanted the input of the VCVS to be 1 volts. In the example that I used in the video, the output of the supply is suppose to be 12V, the gain is then Again=12V/1V=12. Another example, if your supply is 5V, then you set the gain to 5. I hope this answer your question.
May you have happy simulations ;-)
Robert Bolanos