| ??? 12/12/10 17:26 Read: times |
#180096 - Try to add storage caps... Responding to: ???'s previous message |
...to the 24V supply. But remember: Delivering 10A for a period of 100msec with a voltage dip of only 1V needs a capacitance of about
C = Q / U = I x t / U = (10 x 0.1 / 1) F = 1F = 1000 mF = 1,000,0000 µF !! May be it's better to migrate to a faster 24V supply? Anyway, you need to measure somehow, whether there's a relevant dip of supply voltage at all. So, it's scoping time! Check also, whether the free wheeling diodes are still conducting, when the valves are periodically turned-on again. This can also cause huge voltage dips!! More, the testing setup seems to use too long cables. This adds not only inductance but also lots of ohmic resistance! Kai Klaas |
| Topic | Author | Date |
| Solid State Relay characterisitics | 01/01/70 00:00 | |
| Perhaps... | 01/01/70 00:00 | |
| Inadequate power supply | 01/01/70 00:00 | |
| Duty cycle fixed | 01/01/70 00:00 | |
| Peak vs Average power | 01/01/70 00:00 | |
| Peak current | 01/01/70 00:00 | |
| Do DC solenoids have inrush current problem? | 01/01/70 00:00 | |
| Yes, because they consume power... | 01/01/70 00:00 | |
| like relays | 01/01/70 00:00 | |
| Inrush current | 01/01/70 00:00 | |
| Try to add storage caps... | 01/01/70 00:00 | |
| Now for plots.. | 01/01/70 00:00 | |
| DAS? | 01/01/70 00:00 | |
Machine not available ... | 01/01/70 00:00 | |
| So try other switchers instead SSR | 01/01/70 00:00 | |
| What about two more SSR's? | 01/01/70 00:00 |