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Jimbo
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Joined: 27-March 08
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Jimbo

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27 Mar 2008
Gentlemen

I've been browsing through your blog on softs starters here & there appears to be quite a body of knowledge amongst you, which is great !

I am currently looking at an application for a soft starter to ramp a 110kW coal centrifuge into life, and the question i have is this ...

Can a soft starter handle changes in the initial load conditions on a motor, and if so what should i be looking for in terms of an SS?

The centrifuge in question can crash stop at any time (for reasons beyond my control), and it very likely we will need to start the unit up under full load conditions, however typically the unit will start with no load in the basket whatsoever.
My objective is to gain a linear RPM ramp from the motor regardless of the initial load; and I am curious as to weather an SS will be able to provide this?
"torque" & "current ramp" sound like quite sexy feedback control features of the SS, but will they a facilitate the linear RMP output that i need ? the obvious and considerably more expensive and solution is VVVF.

James
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