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oil pan 4 · 02-22-17, 01:06 PM

Alright I have made 3 more advancements towards startup inrush reduction.
First I picked up a 1hp 3 phase wye wound 4 pole motor. free. Only problem is the ABB VFD I want to use isn't free.
I went ahead and bought the centrifugal go cart clutch, only problem with it I see is its only got a 3.2 inch pulley. For a 4 pole motor driving a 10 to 11 inch compressor pulley you want at least a 4 inch pulley, a 5 or 6 inche motor pulley would be better. But I bet I can weld a bigger pulley on to go-cart clutch.
Then of course 5 minutes later I found a magnetic clutch for a 56TC frame pump face motor. Only problem is I don't have a pump face motor with mounting base.
But I can get one.
Free spin starting the motor then slam engaging the motor with say a magnetic clutch should only equal a current surge equal to full power free spin starting which for a 4 pole motor is only about 100 to 120% of full load amps. So that could work.

02-22-17, 01:06 PM	#19
oil pan 4 Land owner Join Date: Nov 2012 Location: NM Posts: 1,026 Thanks: 12 Thanked 127 Times in 107 Posts	Alright I have made 3 more advancements towards startup inrush reduction. First I picked up a 1hp 3 phase wye wound 4 pole motor. free. Only problem is the ABB VFD I want to use isn't free. I went ahead and bought the centrifugal go cart clutch, only problem with it I see is its only got a 3.2 inch pulley. For a 4 pole motor driving a 10 to 11 inch compressor pulley you want at least a 4 inch pulley, a 5 or 6 inche motor pulley would be better. But I bet I can weld a bigger pulley on to go-cart clutch. Then of course 5 minutes later I found a magnetic clutch for a 56TC frame pump face motor. Only problem is I don't have a pump face motor with mounting base. But I can get one. Free spin starting the motor then slam engaging the motor with say a magnetic clutch should only equal a current surge equal to full power free spin starting which for a 4 pole motor is only about 100 to 120% of full load amps. So that could work. Last edited by oil pan 4; 02-22-17 at 07:57 PM..