Electromagnetic clutch? How to get a slow engage?

[Logic]

I am looking for/at electromagnetic clutches with an eye on engaging the drive to the alternator and aircon on deceleration only.
(with an override for when the battery is too flat)

The clutches on car aircons and ride on mowers all seem to take instantaneously?
How could one make them 'take' more gradually so as not to shock load the belt etc?

Maybe a capacitor in series with the live?
But think it's a little more involved than that?

[Piotrsko]

High amp long duration engage generally requires silicon switching, MOSFET, TRIAC or IGBT, your choice but generally PWM. some delay can be gained with discretes, but only for short duration because RLC time constants and resulting current are short for the available component capacity. They are already inductive and kinda need full voltage although I suspect the clutching action would partially function at lower volt inputs. What's it going to do: wear out the iron powder? Could abrade the clutch gap towards broken, however. Not my pay grade.

[Logic]

Originally Posted by Piotrsko

High amp long duration engage generally requires silicon switching, MOSFET, TRIAC or IGBT, your choice but generally PWM. some delay can be gained with discretes, but only for short duration because RLC time constants and resulting current are short for the available component capacity. They are already inductive and kinda need full voltage although I suspect the clutching action would partially function at lower volt inputs. What's it going to do: wear out the iron powder? Could abrade the clutch gap towards broken, however. Not my pay grade.

Thx Piotrsko.

Perhaps something simple and mechanical may be best. (for me )

I'm thinking a maybe a pneumatic damper:
A small piston with a tiny orifice or perhaps a slightly conical sleeve.

[me and my metro]

Pulse Width Modulation is how the OEM’s soften electric clutch application. I do not know how to do that with aftermarket components, but this group is amazingly smart. Someone will have an Arduino program to meet your desires.