| ??? 08/09/08 12:54 Read: times |
#157349 - 3 phase output Responding to: ???'s previous message |
Nimish Dave said:
My nearest goal is to convert 1ph 230v to 3ph supply ,the output voltage and frequency is not of much important at this point.
As the frequency is not major concern I can afford to have AT89c51 as the 50hz half cycle is about 10ms and I can get 1us precision with 12MHz crystal. You can generate 3 phase quasi square wave with 60 degrees resolution which is different from the real sinusoidal 3 phase waveform. You will have plenty of high power harmincs which will dissipate in the motor as heat and EMI. The proper way to do it is to use SPWM to produce real sinusoidal 3 phase output. Mahmood |
| Topic | Author | Date |
| Drive IGBT using AT89C51 | 01/01/70 00:00 | |
| good luck | 01/01/70 00:00 | |
| Re: | 01/01/70 00:00 | |
| IGBT short circuit protection | 01/01/70 00:00 | |
| Timings | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| 3 phase output | 01/01/70 00:00 | |
| RE:SPWM | 01/01/70 00:00 | |
| get a device with CCU (capture compare unit) | 01/01/70 00:00 | |
| or with a PCA | 01/01/70 00:00 | |
| PCA 5% useful; CCU 95% useful | 01/01/70 00:00 | |
| IGBT driver | 01/01/70 00:00 | |
| IGBT | 01/01/70 00:00 | |
| HEXFET or IGBT | 01/01/70 00:00 | |
| Compare using software | 01/01/70 00:00 | |
| Compare using software | 01/01/70 00:00 | |
| code | 01/01/70 00:00 | |
| Blowing MOSFETs | 01/01/70 00:00 | |
| soft start design | 01/01/70 00:00 | |
Schematic | 01/01/70 00:00 |