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Soft start motor controller for single phase motor?
3

Soft start motor controller for single phase motor?

Soft start motor controller for single phase motor?

(OP)
Hello everyone,
I am looking for a reasonably priced controller for a 1HP single phase squirrel cage fan motor.
What I am trying to acheive is a quite start-up of a 3 ton fan coil. Something to ramp the load up slowly to prevent the squeeel...
Is there any such animal out there?   Thanks much!  Jon

RE: Soft start motor controller for single phase motor?

You more than likely have a capacitor start motor. Something with a little less starting torque like a permanent split capacitor (PSC) motor may stop the belts slipping.

RE: Soft start motor controller for single phase motor?

Provided that the motor is a capacitor start motor, it is possible to apply a single phase soft starter to the run winding and achieve a useful soft start. Not sure where you can buy one right now, but I designed them for a company I worked for a number of years ago.

Mark Empson
http://www.lmphotonics.com

RE: Soft start motor controller for single phase motor?

Softstarters do exist that can be used for small single phase motors. I know of at least two companies that manufacture them (since one is my own I won't mention either by name). What voltage is the motor to operate at? I am unaware of anyone who manufactures a softstarter for single phase 110-120V operation. 220V the minimum nominal system voltage for the softstaters of which I am aware.

RE: Soft start motor controller for single phase motor?

(OP)
thanks for your input! I found a Single phase soft starter by Baldor. Looks like it will do the trick.  The voltage of the motor is 230V.  Jon

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