| ??? 04/23/09 15:16 Read: times |
#164803 - PF Responding to: ???'s previous message |
Second
We calculate the power for half a period to economize time calculation of the 8051. This is the most common method used in power products, but it is very easy to create an unbalanced load to prove calculations wrong. But then in most cases, people assume balanced load and then use half cycle for their calculations Third It is not more complicated to mesure the difference time between the current and tension and calculate cosine? A table will not occupy a lot fo memory? From the resolution required for your cos phi, you can easily calculate the size of table. With Silabs controller, it shouldn't be a problem at all, I guess. But then, as I was saying, the best method is to compute the apparent power and real power to arrive at the result. If you are looking for less than 1 percent accuracy in your result, You simply cannot use this Silabs controller. Either go for a DSP or use an energy meter chip. Raj Nambiar |
| Topic | Author | Date |
| Power Factor calculations with 8051F120 and C | 01/01/70 00:00 | |
| Cross-posting | 01/01/70 00:00 | |
| occur about this time each year | 01/01/70 00:00 | |
| power factor calculation | 01/01/70 00:00 | |
| Seems complicated. | 01/01/70 00:00 | |
| Real power devided by the apparent power | 01/01/70 00:00 | |
| Considerations | 01/01/70 00:00 | |
| Don't just think linear loads | 01/01/70 00:00 | |
| kVA | 01/01/70 00:00 | |
| The problem with being a flock animal | 01/01/70 00:00 | |
| The best method for your controller | 01/01/70 00:00 | |
| PF | 01/01/70 00:00 | |
| Not too high loads | 01/01/70 00:00 | |
| Considerations II | 01/01/70 00:00 | |
| rms on wikipedia and my previous link | 01/01/70 00:00 | |
PF | 01/01/70 00:00 |