LumberJocks

Sharing Information - American Rotary big sale

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by bonesbr549 posted 02-08-2015 03:40 PM 748 views 0 times favorited 6 replies Add to Favorites Watch
View bonesbr549's profile

bonesbr549

1176 posts in 2531 days


02-08-2015 03:40 PM

Wow, got a flyer i the mail that American Rotary is running a presidents day sale of 16% Off.

If you need a 3phase converter, they are at a heck of a discount. Heck they are cheaper now than when I got mine a few years back.

Great quality.

BTW I have no association with them, just a satisfied Customer.

-- Sooner or later Liberals run out of other people's money.


6 replies so far

View crank49's profile

crank49

3981 posts in 2435 days


#1 posted 02-08-2015 10:02 PM

Don’t knpw why I would want a rotary phase converter.
VFDs are so much more capable, versiitle, and affordablw.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

View TheGreatJon's profile

TheGreatJon

295 posts in 698 days


#2 posted 02-08-2015 10:35 PM

A single rotary phase converter will run every 3 phase tool that you own (if sized appropriately). Not only that, but they aren’t really comparable to VFDs. A rotary phase converter will actually generate and balance the third leg of power for your machines so that they can smoothly run to full capacity. A VFD can be used to get a 3 phase machine started, but will let the machine run on single phase power. This means that you only get about 2/3 of the power out of your machine, and it is not likely to be balanced electrically.

For the hobbyist, a little less power and extra motor wear are not likely to be an issue because the machine is not running all day long, every day. But saying that a VFD is a good replacement for a phase converter is not exactly true because they are meant to perform different functions. The ideal situation would be using a VFD in series with a rotary phase converter. Then you get full power and speed adjustment options.

-- This is not the signature line you are looking for.

View crank49's profile

crank49

3981 posts in 2435 days


#3 posted 02-08-2015 10:47 PM

Jon, Are you talking about a static phase converter compared to a rotary phase converter?
If you are your statement is true.

But a static phase converter is nothing at all remotely similar to a VFD.

A VFD takes what ever voltage you feed it, converts it to DC, then inverts it back to AC at whatever voltage and how ever many phases and at what ever offset you want. It puts out true three phase full time power at variable hertz. By adjusting the hertz you change the speed of an induction motor if that is what you want. But the fact that it produces three phase from single phase is a fringe benefit. A VFD could even be purchased that will run any motor off DC. Just check out any of the new electric cars on the road. They all run this way.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

View TheGreatJon's profile

TheGreatJon

295 posts in 698 days


#4 posted 02-09-2015 01:13 AM

LoL. Yep, my bad.

Economically, an RPC is still a great option if you are going to have a lot of 3 phase equipment, especially anything much over 5hp. But I think you’re right about how VFDs work. There’s a reason I went with mechanical engineering – all that mumbo jumbo with electrons gets pretty confusing…

-- This is not the signature line you are looking for.

View bonesbr549's profile

bonesbr549

1176 posts in 2531 days


#5 posted 02-09-2015 01:22 AM

WOW, so funny the whole VFD, .vs. RPC, is still kicking huh.

-- Sooner or later Liberals run out of other people's money.

View crank49's profile

crank49

3981 posts in 2435 days


#6 posted 02-09-2015 01:48 AM

That’s a good point. VFDs are not cheap, especially when you get to larger sizes. And, especially if you need a big one without using the variable speed function. But I have seen 3 hp units for less than $100.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com