Groups > sci.electronics.design > #725464

Re: DC relay latching voltage

From	Don Y <blockedofcourse@foo.invalid>
Newsgroups	sci.electronics.design
Subject	Re: DC relay latching voltage
Date	2024-08-24 23:21 -0700
Organization	A noiseless patient Spider
Message-ID	<vaeih5$1pk55$1@dont-email.me> (permalink)
References	(3 earlier) <vaa6qa$u84s$1@dont-email.me> <vaaoq8$112hi$4@dont-email.me> <vabpmo$1995r$1@dont-email.me> <vabulh$19qc6$1@dont-email.me> <vaeduc$1ov6k$1@dont-email.me>

Show all headers | View raw

On 8/24/2024 10:03 PM, John Robertson wrote:
> Good reading! It appears counterintuitive, but if I warp (!) my head around it 
> I should be able to sort it out.

Think about the extremes:

- with NO diode  or snuber, there is nothing to keep the magnetic
   field intact when the switch opens.  So, the spring force is the
   sole actor in play, pulling the contacts open
- with a diode, some current continues to "recirculate" in the coil
   thus keeping the magnetic field active -- so it is trying to hold
   the relay closed while the spring is trying to open it.  *When*
   the recirculating current falls, the field collapses and the relay
   can open.

The zener lets the circuit look more like the "no diode" case.

Back to sci.electronics.design | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

DC relay latching voltage Pimpom <Pimpom@invalid.invalid> - 2024-08-23 16:07 +0530
  Re: DC relay latching voltage Arie de Muijnck <noreply@ademu.nl> - 2024-08-23 13:09 +0200
    Re: DC relay latching voltage Pimpom <Pimpom@invalid.invalid> - 2024-08-23 17:17 +0530
  Re: DC relay latching voltage piglet <erichpwagner@hotmail.com> - 2024-08-23 11:16 +0000
    Re: DC relay latching voltage Pimpom <Pimpom@invalid.invalid> - 2024-08-23 17:29 +0530
      Re: DC relay latching voltage John Robertson <jrr@flippers.com> - 2024-08-23 07:36 -0700
        Re: DC relay latching voltage Pimpom <Pimpom@invalid.invalid> - 2024-08-23 23:11 +0530
          Re: DC relay latching voltage liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-24 11:11 +0100
            Re: DC relay latching voltage Pimpom <Pimpom@invalid.invalid> - 2024-08-24 20:28 +0530
              Re: DC relay latching voltage liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-08-25 09:48 +0100
            Re: DC relay latching voltage john larkin <jlarkin_highland_tech> - 2024-08-24 09:44 -0700
              Re: DC relay latching voltage piglet <erichpwagner@hotmail.com> - 2024-08-24 22:10 +0000
        Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-23 12:43 -0700
          Re: DC relay latching voltage John Robertson <jrr@flippers.com> - 2024-08-23 22:05 -0700
            Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-23 23:29 -0700
              Re: DC relay latching voltage John Robertson <jrr@flippers.com> - 2024-08-24 22:03 -0700
                Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-24 23:21 -0700
                Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-24 23:22 -0700
                Re: DC relay latching voltage john larkin <jlarkin_highland_tech> - 2024-08-25 20:03 -0700
                Re: DC relay latching voltage piglet <erichpwagner@hotmail.com> - 2024-08-25 07:40 +0000
                Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-25 02:03 -0700
                Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-25 02:07 -0700
                Re: DC relay latching voltage John Robertson <jrr@flippers.com> - 2024-08-25 08:30 -0700
                Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-25 11:52 -0700
                Re: DC relay latching voltage John Robertson <jrr@flippers.com> - 2024-08-25 22:01 -0700
                Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-25 23:27 -0700
                Re: DC relay latching voltage John Robertson <jrr@flippers.com> - 2024-08-26 10:00 -0700
                Re: DC relay latching voltage Don Y <blockedofcourse@foo.invalid> - 2024-08-26 13:49 -0700
              Re: DC relay latching voltage john larkin <jlarkin_highland_tech> - 2024-08-25 08:19 -0700
            Re: DC relay latching voltage john larkin <jlarkin_highland_tech> - 2024-08-25 08:09 -0700
              Re: DC relay latching voltage John Robertson <jrr@flippers.com> - 2024-08-25 08:37 -0700
          Re: DC relay latching voltage Lasse Langwadt <llc@fonz.dk> - 2024-08-24 14:32 +0200
  Re: DC relay latching voltage john larkin <jlarkin_highland_tech> - 2024-08-23 08:09 -0700

csiph-web