Re: Ignition Solonoid Question Reply #25 – October 04, 2017, 10:50:13 am Quote from: Old phart phred – October 03, 2017, 10:32:18 pmBefore I ruffle any feathers I not an electrical engineer, just a HVAC and hydronics engineer hoping to learn some of the idiosyncrasies of my coach. How does a diode absorb energy? I know when you "collapse a coil" voltage wants to rise to infinity but somewhat limited I think by the number of turns of the coil if IRC causing spikes.The diode is to stop feed back. Quote Selected
Re: Ignition Solonoid Question Reply #26 – October 04, 2017, 02:43:13 pm Why do we call it "ignition" solenoid??Jim Quote Selected
Re: Ignition Solonoid Question Reply #27 – October 04, 2017, 03:02:40 pm Quote from: Jim Sizemore – October 04, 2017, 02:43:13 pmWhy do we call it "ignition" solenoid??JimBecause 12 VDC positive from the key/ignition switch closes the contacts, which then powers all circuits hot only when the ignition is on. Quote Selected
Re: Ignition Solonoid Question Reply #28 – October 04, 2017, 05:20:44 pm Thanks, Brett - I had figured that, but just had to ask, since we're diesel...Jim Quote Selected
Re: Ignition Solonoid Question Reply #29 – October 04, 2017, 05:29:43 pm Quote from: Old phart phred – October 03, 2017, 10:32:18 pmBefore I ruffle any feathers I not an electrical engineer, just a HVAC and hydronics engineer hoping to learn some of the idiosyncrasies of my coach. How does a diode absorb energy? I know when you "collapse a coil" voltage wants to rise to infinity but somewhat limited I think by the number of turns of the coil if IRC causing spikes.This explains how it works:Flyback diode Quote Selected 1 Likes
Re: Ignition Solonoid Question Reply #30 – October 04, 2017, 06:08:53 pm Peter,Excellent information-- I have seen then in a number of applications, including RV's.For those less "electrically savvy" it would be great for someone with knowledge to post exactly what diode (and how to identify it at a "Radio Shack", etc) would be appropriate for a 12 VDC relay/solenoid.Thanks. Quote Selected
Re: Ignition Solonoid Question Reply #31 – October 04, 2017, 09:33:12 pm Many years ago when I worked at the Tampa Foretravel store we had a memo from Foretravel and we had to install these diodes on all solenoids in use in the coach. Quote Selected
Re: Ignition Solonoid Question Reply #32 – October 04, 2017, 11:16:43 pm I was told that the diodes have not been used for years now. I removed the one that was on mine. Should there be one?Mike Quote Selected
Re: Ignition Solonoid Question Reply #33 – October 04, 2017, 11:34:43 pm Do not see any on my bigger coach relays, you may need, or not need them. Do I need a flyback diode with an automotive relay? - Electrical Engineering...If you scroll down, you will see some smaller common relays have a diode built in. Quote Selected 2 Likes
Topic: Ignition Solonoid Question