| ??? 06/12/07 19:43 Read: times |
#140623 - power dips and spikes Responding to: ???'s previous message |
I will start looking into how PLC's handle this but would you guys have a suggestion on where to start looking? Keywords? Brands?
If you put say a one farad (YES, ONE FARAD, no milli or micro) capacitor across your 5V output, your control electronics should be safe. Of course you will feed the capacitor and the circuit through an inductor as well. If the dips are short enough, you need not be concerned with the relays, they will hang on for a while. You will definitely be better off with a switching power supply (look at Phihong (prices at mouser), dirt cheap and they may just have what you need) but even a switcher will give up supplying if the input drops too far. A typical switcher will hang on to half the rated input or below - far better than any linear solution. A randomly chosen Phihong datasheet states INPUT: AC Input Voltage Rating 100 to 240VAC Erik http://www.phihong.com/html/power_supplies.html |
| Topic | Author | Date |
| Under/Over Voltage Protection | 01/01/70 00:00 | |
| How Big a Motor | 01/01/70 00:00 | |
| Transients | 01/01/70 00:00 | |
| never thought of that, but worth emphasizing | 01/01/70 00:00 | |
| Crikey! | 01/01/70 00:00 | |
| carve this into stone | 01/01/70 00:00 | |
| Only, if you buy the cheapest ones... | 01/01/70 00:00 | |
| i've heard | 01/01/70 00:00 | |
| voltage dips | 01/01/70 00:00 | |
| I doubt it | 01/01/70 00:00 | |
| power dips and spikes | 01/01/70 00:00 | |
| Dippy | 01/01/70 00:00 | |
| How long lasts the mains dip? | 01/01/70 00:00 | |
| mains dip | 01/01/70 00:00 | |
Sprinkle as many caps as possible... | 01/01/70 00:00 |