| ??? 01/19/09 13:04 Read: times |
#161614 - More detail needed Responding to: ???'s previous message |
Rather than just re-write the post in the same brief fashion, you need to supply more, clearer details!
In particular, you should give a link to the Datasheet(s) for your solenoids. And your schematic. A link to a datasheet for the FET would also be helpful. eg, you haven't answered Per's question: Per Westermark said:
If you have a 36A power supply - do you think that means that the PSU is always sending out 36A and if you only connect a single solenoid, then it will get 36A? It doesn't work like that. The solenoid will only pick up 3A as long as the PSU supples no more than 24V. The remaining 33A will not be consumed. The PSU will basically "idle". In other words, If a Solenoid's rating is "24V, 3amp", that means that the maximum current it will draw from a 24V supply is 3A - it makes no difference whether the supply has a capacity of 3A or 300A. You also need to determine whether that 3A is the peak current, or steady-state current: Solenoids tend to take a large initial peak (or "inrush") to "pull-in", but a relatively lower current to hold - known, unsurprisingly, as the "holding" current. I think this was covered in your previous thread? Muhammad Naeem said:
I m using MOFET irf510. I presume you mean that you're using one MOSFET per solenoid? |
| Topic | Author | Date |
| MOSFET with exceed current | 01/01/70 00:00 | |
| only one solenoid at a time -> go for smaller PSU | 01/01/70 00:00 | |
| Experience? | 01/01/70 00:00 | |
| re: MOSFET with exceed current | 01/01/70 00:00 | |
| More detail needed | 01/01/70 00:00 | |
Solenoid coil current | 01/01/70 00:00 |