Sine wave power inverter

[sougata]

4. Please note that keep your high-side MOSFETs turned on during the entire cycle and apply PWM to the low side MOSFET. Initially I tried steering the PWMs to all of the four MOSFETs to make up for the conduction switching loss. But it did not produce satisfactory results.

Hi Charles,

Your system was essentially a double conversion system. Although it has two power stages but the sinewave regulation becomes real easy when you have your DC bus regulated. I had my original design of the DC boost using a SG3525 followed by a PIC driving MOSFETs to produce the sinewave. Now I am trying to utilize a dsPIC (I am in the process of learning it and still a Newbie ) to handle both the conversions as well as battery charging on mains availability. My knowledge in SMPS is very limited till date and I am working hard for those "gotchas". So wish me luck. (I need it for keeping the number of toasted MOSFET/Chopper low, obtained during trial phase)

[Navneet Vinaik]

Hi Charles,

Now I am trying to utilize a dsPIC (I am in the process of learning it and still a Newbie ) to handle both the conversions as well as battery charging on mains availability. My knowledge in SMPS is very limited till date and I am working hard for those "gotchas". So wish me luck. (I need it for keeping the number of toasted MOSFET/Chopper low, obtained during trial phase)

Dear Sougata,

I have a short experience in this domain but have learnt quite a few things. I have developed a UPS on 16F676, square wave inverters on 16F72 and sinewave inverter again on 16F72 based on H bridge..... all in the past one year. Now, I am keen to work on ferrite core...so if you can guide me some thing..please help....I want to grow in this field, presently am working on SMPS designing(low power, upto 200W only)....the fire is there in me, everyone please guide....

[mincing]

Navneet Vinaik,

Dont worry!This field is more of a stabilized now.You will get every kind of information you need.

let me know what exactly you need.If not able to answer directly,I can give you links and sourcs.