| ??? 02/03/11 22:41 Read: times |
#180990 - Absolutely Responding to: ???'s previous message |
I do program pics for sinewave inverters too plus thousand other things, and I agree with Raj.
What you should do is divide the output AC waveform by resistors and make full wave rectifier by op-amp. Then read ADC for each sample in your timer interrupt for feedback. You need PIC18F family or dsPICs for ac feedback in real time, I found the PIC16F family good only for simple sinusoidal PWM inverters without output ac feedback. You do not have to use assembly for this, I did 4 types of sinusoidal inverters and I used hi-tech c compiler and they work perfectly well with short circuit protection. I did 400VA, 800VA, 2000VA and 2400VA sinusoidal pwm inverters with H-Bridge driver HIP4081 and HIP4082 and power MOSFETS. You need to measure the Drain - Source voltage of the lower MOSFET pairs in real time also for waveform shaping and short circuit protection. Mahmood |
| Topic | Author | Date |
| How to measure a clipped and non-clipped sinewave accurately | 01/01/70 00:00 | |
| peak voltages does not represent RMS if distorted curve | 01/01/70 00:00 | |
| RE: How to measure a clipped and non-clipped sinewave | 01/01/70 00:00 | |
| Still can't look at a single point in time | 01/01/70 00:00 | |
| RE: Still can't look at a single point in time | 01/01/70 00:00 | |
| peak-to-RMS relation In general | 01/01/70 00:00 | |
| I have posted this thread on some other forum | 01/01/70 00:00 | |
| Sine feedback for inverter | 01/01/70 00:00 | |
| Absolutely | 01/01/70 00:00 | |
| Re: Sine feedback for inverter | 01/01/70 00:00 | |
| hints | 01/01/70 00:00 | |
| Waveform comparison | 01/01/70 00:00 | |
| What if? | 01/01/70 00:00 | |
Drive and table | 01/01/70 00:00 | |
| Re: Waveform comparison | 01/01/70 00:00 |