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I am designing an inverter. My programing is below average and I need to decide whether to use a digital or analog microcontroller for switching my switches. I need to have a PWM output (Unipolar or Bipolar).
What is an analog microcontroller? Do you mean one with a built-in D/A and/or A/D.
For PWM inverter control you need a microcontroller that can output a PWM signal. A built-in A/D might be useful for converting the DC voltage you are trying to regulate, to a digital signal the µC can use to control the PWM period (assuming your desired output is a DC voltage).
Blue, I need 9 A(rms) and 220 Vac(rms) on the output of my inverter. So, I need to decide how I'm going to generate my PWM signal. No DSP board. Is there a single chip I can use that's efficient in power processing? Analog circuits for generating PWM signals seem too big and likely to make whole system not function. Please suggest alternative method.
Yes,tcm. But my mains is also at 50Hz. Someone may ask, why?...this is for academic purpose and not packagin or domestic use. I'm just using rectified mains as my available DC for testing. The objective is to have a constant 220VAC,50Hz and supply 2kW at full load. Hope that explains context. Blue, I'm not using a battery.
Hahaha For me confusion usually leads to my spelling!
What type of purpose and accuracy are you looking for on the inverter side of the system?
do you need a pure sine wave or a very constant voltage or some form of current limiting?
We need far more information relating to what you are trying to produce on the output side of the device.
And what academic purpose it serves. Often times there are alternative methods that can and will produce fare better results than what a home made device can do.
You have quite a job in front of you. A 2kVA on-line, double conversion with 3% THD. UPS Companies devote entire design teams to such tasks. Why re-invent the wheel? Just go out and buy yourself a UPS.
Lol!...You r not helping me. I know 3% is insane but that's what my Prof wil accept as my spec. I don't think he strickly expects it. I just need to build an inverter and demonstrate it works by supplying a load of said rating. I have to design it from first principles.