Soft Motor Starter.

[bilalmalik]

MOD Edit: - Self promotion is not welcome here on ETO.

Post deleted

 

[MaxHeadRoom78]

I believe these will only work reliably with 3ph motors, 1ph are very tricky to run variable frequency or soft-start.
M.

 

[tcmtech]

Why exactly do you need to do a soft start for a 12 volt fan motor? I have never seen any large electric radiator fans on vehicles use anything but direct online through a sufficiently sized relay. The only slight degree of additional current limiting they get is by the wiring itself.

 

[MaxHeadRoom78]

The OP refers to 3ph soft starters, these are often used in place of using Star-Delta starting or where a motor winding-capable is not fitted .
Max.