Timeline for Resistor in series with Solenoid Valve (for voltage reduction)
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Dec 20, 2016 at 21:57 | comment | added | Jim Wilson | @Tut - You're right, by definition the inductance will tend to resist the change in voltage. But as you say, that will quickly go away, and long before burning the coil wiring open (I don't see insulation breakdown being an issue at that voltage level). Interesting on the stepper motors. Thanks! | |
| Dec 20, 2016 at 18:14 | comment | added | Tut | You have a couple misconceptions: 1) "...the valve will never see more than 14 Volts." No, current is initially zero so the valve will see 28V (assuming zero inductance for the resistor). 2) Since the coil will see 28V when first energized, the current will rise more quickly than the same coil powered by 14V with no resistor. Before chopper-drives came into fashion, this was a common way to drive stepper motors to get the current flowing more quickly. | |
| Dec 20, 2016 at 18:01 | answer | added | Olin Lathrop | timeline score: 2 | |
| Dec 20, 2016 at 17:52 | answer | added | Jack Creasey | timeline score: 0 | |
| S Dec 20, 2016 at 13:44 | comment | added | Jim Wilson | @Jack - yes, it's only a pulse. I agree, a holding valve at that power level will create a huge cooling issue. We're looking at less than a second, maybe 150 milliseconds - so virtually no Joules to speak of. | |
| S Dec 20, 2016 at 13:44 | comment | added | Jim Wilson | @Bradman, that's why I posted here...to get some opinions, like yours. I do think that not seeing something in the field doesn't necessarily mean it won't work - it certainly may mean it won't work, but it's not conclusive either way. | |
| Dec 20, 2016 at 6:58 | answer | added | baha hasan | timeline score: 0 | |
| Dec 19, 2016 at 23:16 | comment | added | Jack Creasey | @Jim Wilson. You say this is a 'latching' solenoid. Does this mean you only apply a pulse to the solenoid and it then stays on and is unpowered? | |
| Dec 19, 2016 at 23:01 | answer | added | vini_i | timeline score: 1 | |
| Dec 19, 2016 at 22:42 | comment | added | Bradman175 | Why not get an oscillator, go through a transformer and a bridge rectifier and smoothing circuit? Like converting DC-AC-AC-DC. I never see people use a resistor in series and like you said, it's not a good idea. | |
| Dec 19, 2016 at 22:38 | review | First posts | |||
| Dec 19, 2016 at 23:06 | |||||
| Dec 19, 2016 at 22:36 | history | asked | Jim Wilson | CC BY-SA 3.0 |