HI you Guys:
First posting to the forum, but I have tried to read up ahead of this inquiry.
I bought a 1943 motor generator 10 EE 15 years or so ago ( 20 ?) for my business.
Love it. It arrived dead & I had to learn about the MG system from a blurry FAX, but I fixed it.
Of course my Colchester at home seems primitive by comparison, so I have decided to finally upgrade to an EE in the home shop.
OK: 240 single phase at home.
So many options.
I have visited three VFD with a three phase motor conversions. None of them brake for threading, all three had the back gear gearbox removed. They coasted forever & none of them pulled above 1250 rpm.
Not great for low end torque. Quiet though !
I have tried a tube drive, & it seemed twitchy & ready to cause grief upon failure.
The hydraulic drives are fascinating, but rarely seen.
So, it looks like a MG style with either a rotary phase converter ( more noise on top of the MG system, just what my neighbors would enjoy. ) an EE converted to a three phase motor with a VFD, or the other option. PWM control of the original MG DC motor & gearbox. Huh.
Since the original MG units pull back the field voltage for higher speeds, would a DC controller just top out at 700 rpm ? Is there a unit that can DC control up to 2000rpm or so ?
I'd be interested in hearing your current opinions.
I'm on the fence and looking at several right now.
One I recently saw has a forlorn empty hole where the driveline was, with an old three phase motor in it.
Quiet, & maybe I can figure out how to program braking into the controller, but it kinda feels like buying a vintage Corvette with a Maytag washing machine motor in it.
It seems that the character is missing.
Let me know your thoughts.
I converted my industrial sewing machine to a DC stepper motor & it sure is nice to not have that motor drone away like a MG unit.
Tempting to have a quiet EE, but at what cost......
First posting to the forum, but I have tried to read up ahead of this inquiry.
I bought a 1943 motor generator 10 EE 15 years or so ago ( 20 ?) for my business.
Love it. It arrived dead & I had to learn about the MG system from a blurry FAX, but I fixed it.
Of course my Colchester at home seems primitive by comparison, so I have decided to finally upgrade to an EE in the home shop.
OK: 240 single phase at home.
So many options.
I have visited three VFD with a three phase motor conversions. None of them brake for threading, all three had the back gear gearbox removed. They coasted forever & none of them pulled above 1250 rpm.
Not great for low end torque. Quiet though !
I have tried a tube drive, & it seemed twitchy & ready to cause grief upon failure.
The hydraulic drives are fascinating, but rarely seen.
So, it looks like a MG style with either a rotary phase converter ( more noise on top of the MG system, just what my neighbors would enjoy. ) an EE converted to a three phase motor with a VFD, or the other option. PWM control of the original MG DC motor & gearbox. Huh.
Since the original MG units pull back the field voltage for higher speeds, would a DC controller just top out at 700 rpm ? Is there a unit that can DC control up to 2000rpm or so ?
I'd be interested in hearing your current opinions.
I'm on the fence and looking at several right now.
One I recently saw has a forlorn empty hole where the driveline was, with an old three phase motor in it.
Quiet, & maybe I can figure out how to program braking into the controller, but it kinda feels like buying a vintage Corvette with a Maytag washing machine motor in it.
It seems that the character is missing.
Let me know your thoughts.
I converted my industrial sewing machine to a DC stepper motor & it sure is nice to not have that motor drone away like a MG unit.
Tempting to have a quiet EE, but at what cost......