Need suggestions for solar inverter design.

Thread Starter


Joined Oct 16, 2015

I want to design a 3 phase solar inverter. specifications are following.

Input Voltage: 400V DC max.
Output Voltage: 230 V AC, 3 phase.
Functionality: MPPT.

I have started work using PIC18F4550 microcontroller. I am generating PWM pulses. But I am getting many problems in generation of exact duty cycle/timing and v/f. So i want to get suggestions from you that is it okay to go with PIC18F4550 or do I need to change it to dcPIC ?

Also I am unable to get proper support in inverter design with PIC18F4550.
Please suggest me a proper link/application note and microcontroller.

Thanks in advance.


Joined Aug 21, 2008
If the PIC can give you three channels on for the PWM and another separate timer to provide the interrupt at when it is time to update the PWM settings for all three channels, and of course it is fast enough for the resolution you are attempting, then it should work.

Been doing this with an ATMEGA48; it was not easy but it was done.