Sujet : Re: DC relay latching voltage
De : blockedofcourse (at) *nospam* foo.invalid (Don Y)
Groupes : sci.electronics.designDate : 25. Aug 2024, 07:22:01
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vaeiiv$1pk55$2@dont-email.me>
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On 8/24/2024 11:21 PM, Don Y wrote:
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.
i.e., imagine that case as having an infinite voltage zener (open
circuit) in series with the diode -- NO diode!
Re: DC relay latching voltage
Re: DC relay latching voltage