Si eu recomand tot LTspice, program gratuit, bun, versatil, usor de invatat. Eu am simulat mai multe tipuri de convertoare complete cu SG3525 si IR2110 si procedeul este pentru useri care au cunostinte avansate in tehnica convertoarelor si a procedurilor de simulare. Incercati sa postati o schema bloc, sau de principiu, cu date tehnice de intrare si iesire: - tensiune de alimentare - o tensiune fixa, sau mai multe tensiuni fixe sau tensiune variabila, curent, putere de iesire - stabilizare sau nu - ce doriti sa alimentati cu ea sau este doar o idee sau un proiect - cu ce componente doriti sa lucrati, tranzistori, diode, miezuri,etc Nu doresc sa va descurajez, dar vreo 200 de ore de studiu si simulari mai simple sunt necesare, pornind de la simplu la complex si in final la un produs optimizat. Pentru inceput un circuit de studiu simplu este in atasament. La decomprimare exista si un fisier text cu indicatii.

Keep going quotes. @gsabac Edited August 31, 2017 by gsabac.

I have previously written quite a few articles on sinusoidal pulse width modulation (SPWM). I've discussed about how to generate the sine table, how to implement it, how to practically generate the SPWM signals (with example code) and also how to implement feedback with simple sine table manipulation with table pointer instead of complex PID control.

Jul 15, 2016 - SMPS circuit SG3525 and IR2110 integrated on the board in the primer drive.

All these methods have one thing in common regarding the implementation - use of the sine table and its control with the table pointer. Whether you use or implement feedback or not, the table pointer is used to access and retrieve values from the sine table. Hi hema, If PROTEUS simulation is a must, then you must change your microcontroller since, as you know, PIC16F777A is not available in PROTEUS.

Here are some microcontrollers that are available in PROTEUS and have 3x ECCP modules: PIC18F6527 PIC18F6622 PIC18F6627 PIC18F6628 PIC18F6722 PIC18F6723 PIC18F8527 PIC18F8622 PIC18F8627 PIC18F8722 These dsPIC33 microcontrollers are available in PROTEUS have Motor Control modules that you can make use of (if you can use dsPIC33, I highly recommend them): dsPIC33FJ12MC201 dsPIC33FJ12MC202 dsPIC33FJ16MC304 dsPIC33FJ32MC202 dsPIC33FJ32MC204 Hope this helps! Regards, Tahmid. @ Anonymous, I have written an article regarding the generation of sine wave without ECCP module - using only one CCP module. I have used PIC16F877A which has only CCP modules.

Like PIC16F877A, PIC16F88 doesn't have any ECCP module. But PIC16F88 does have a CCP module which you can use to generate the sine wave using my program/method with slight modification as required to port it to PIC16F88. View the article here: Sine Wave Generation without ECCP - Using single CCP Module of PIC16F877A Regards, Tahmid. Hi Tahmid, thanks for explaining the above but why cant the same result be gained by simply incrementing one variable and using it to point to the sine values sequentially then resetting that variable when it becomes equal to the number of values? I have loaded and understood your code and method but can't understand why this simpler method will not produce the same results.

When I run my code in Proteus it only shows the middle few values/pulses then flat for the rest of the signal. Is the code 'falling over it's self' because it's not using large numbers or could it be a fault in Proteus? Could really do with some advice on this as I can't find any obvious fault in my code. I'm waiting for an oscilloscope to be delivered (which I needed any way) so I can determine whether it is a fault in the simulation software but when I run your code it simulates fine. Regards, Dale. Anonymous Hi Tahmid I have generated a sinewave with a single PWM pin on a microcontroller.

Across the PWM pins(after AND gate) if i connect a RC filter, i get a good sinewave. But now i connect this to an H bridge with driver(which is working from another inverter) i see lots of problems. 1)Cross conduction, even after adding 0 at both ends) 2)crooked sinewave What could this be? Is it that, in the ISR updates are slower than overflow period of 62.5us?Although my controller is running at 8MHz. I checked that the ISR requires close to 37usec.How can the code run then?

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