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View Tzweber's profile

Dust collector motor swap?

by Tzweber
posted 11-04-2018 01:51 AM


8 replies so far

View shampeon's profile

shampeon

1900 posts in 2692 days


#1 posted 11-04-2018 02:24 AM

Buy a VFD. $100-400.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

View Tzweber's profile

Tzweber

37 posts in 387 days


#2 posted 11-04-2018 03:21 AM

Where do you find a VFD capable of sending 20amps at 220v for that price?

View FancyShoes's profile

FancyShoes

592 posts in 1873 days


#3 posted 11-04-2018 04:11 AM

I fond it funny how so many people are quick to say VFD.. bro, not every machines needs a variable speed! Peope see like, put vfd on that table saw… why not spend less and use a static phase convertor?

I would say sell it and but another one that is single phase.

What is the RPM of your motor? I have a few spare 5hp motors, I could let one go for $250, they are 3450 rpm

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Tzweber

37 posts in 387 days


#4 posted 11-04-2018 12:46 PM

The motor I need to replace is a 184TC frame 3450 rpm Baldor motor. I’d take one off your hands if you’re willing and not too far away to ship for a reasonable price.

View shampeon's profile

shampeon

1900 posts in 2692 days


#5 posted 11-04-2018 04:29 PM

Ebay has a bunch of varying quality. I’d probably steer clear of the cheapest ones, though some people have been running them with no trouble.

Static phase converters are harder on the windings and lose a third of the HP, but they’re cheap and simple, it’s true. But why turn your 5 HP into a 3.3HP motor?

The reason you get a VFD isn’t necessarily because you want to vary the speed of the motor, it’s because you get full HP in a 3ph motor using 1ph wiring, all for less than the cost of replacing it with a new 1ph motor. Variable speed is a bonus feature you can use or not.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

View MrUnix's profile

MrUnix

7478 posts in 2708 days


#6 posted 11-04-2018 07:50 PM

Where do you find a VFD capable of sending 20amps at 220v for that price?
- Tzweber

Is the 5hp motor on yours really rated at 20A?!?

why not spend less and use a static phase convertor?
- FancyShoes

That would be my absolute last resort, and I’d rather swap motors than go that route. As mentioned, the SPC will reduce the motors power by roughly 1/3, and run the motor unbalanced – causing it to run hot and therefore more likely to burn up prematurely. Both conditions make it an extremely bad choice for a DC.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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Tzweber

37 posts in 387 days


#7 posted 11-04-2018 08:45 PM

19.6 amp at 100% load. Starting amps is considerably higher to get the thing to spin up. That’s why it’s wisely suggested to get 2.4X the hp rating when selecting a rotary converter. Industrial products don’t mess around with posting high fake hp numbers but low FLA numbers.

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Tzweber

37 posts in 387 days


#8 posted 11-04-2018 08:52 PM

I should also mention the motor is not rated for inverter duty so that really limits VFD choices although it doesn’t rule them out completely.

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