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I need some help regarding the use of an FPGA or DSP for the control loop of the three-phase solar inverter. I want to implement a digital feedback system (as shown below) instead of analog and therefore am looking for the best result. in real time. I am starting from scratch an have some knowledge about both of them. I want to ask which one is better in its working in these applications and what do mostly people use??

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I also want to have some Iot based monitoring system in my inverter. Also, I have seen some people using a combination of DSPs and FPGAs. How does that combination work and what is the advantage of it??

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  • \$\begingroup\$ doesn't a part of the FPGA act as a DSP when it is in circuit? \$\endgroup\$
    – jsotola
    Commented May 5 at 22:23
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    \$\begingroup\$ There are plenty of MCUs and DSPs with built-in peripherals that are specifically intended for applications related to 3-phase power -- both generation and consumption. There is rarely a need to bring the extra complexity of an FPGA and its toolchain into the picture unless you're doing something really unusual. \$\endgroup\$
    – Dave Tweed
    Commented May 5 at 23:55
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    \$\begingroup\$ I’d suggest having a peruse of websites such as Ti.com and analog.com. Motor drives and inverters are big business so just about all the major semi companies have offerings. You’d have to be doing something exotic to go down the fpga path these days. Even standard microcontrollers can cope with simpler inverters like you are proposing. - STM32, Kinetis, TMS570. What do you call ‘Real Time’? It helps to scope this as real time could be nanoseconds to some or milliseconds to others. \$\endgroup\$
    – Kartman
    Commented May 6 at 11:40
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    \$\begingroup\$ I’d suggest you get your hands on a dead solar inverter for the purposes of seeing how others have solved the problem. My local junk yard frequently has single phase ones for $10or $20. Bonus points if you fix it. \$\endgroup\$
    – Kartman
    Commented May 6 at 11:43
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    \$\begingroup\$ We don't do product recommendations here, but I've worked with some Microchip products in this area. \$\endgroup\$
    – Dave Tweed
    Commented May 6 at 11:55

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