Low Speed High Torque Motors
Low Speed High Torque Motors
(OP)
We are attempting to source low-speed high-torque VFD drives in the 200 to 750 HP range and appreciate hearing from fellow members own experiences.
How manufactures such a motor and control system?
Any advise?
Thanks,
Don West
How manufactures such a motor and control system?
Any advise?
Thanks,
Don West





RE: Low Speed High Torque Motors
900 RPM, 600 RPM, 360 RPM, ??
yours
RE: Low Speed High Torque Motors
RE: Low Speed High Torque Motors
If you find that you have to use a gearbox it may be economical to go all the way to 1800 RPM.
A motor of a given frame size will usually generate the same torque regardless of the speed it is wound for.
If you peruse the frame size tables you will find that a frame that is used for 10 HP at 1200 RPM is also used for 15 HP at 1800 RPM and 30 HP at 3600 RPM. There are some exceptions but the relationship is pretty close.
Following that ratio, a 10 RPM motor may be 180 times as large as a 1800 RPM motor of the same Horsepower.
Or, your 750 HP motor at 10 RPM is about the same size as a 135000 Horspower motor at 1800 RPM. I may be off a few hundred percent at these low speeds but your motor will still be quite large and proportionately expensive.
yours
RE: Low Speed High Torque Motors
750Hp at 10 Rpm is 394,000 Ft/lb requiring a rather enormous gearbox.
RE: Low Speed High Torque Motors
RE: Low Speed High Torque Motors
HiTorq, maybe if you described your needs in a little more detail we can direct you on a path to further enlightenment.
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: Low Speed High Torque Motors
No, many hydraulic motors do not need gear boxes.
RE: Low Speed High Torque Motors
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: Low Speed High Torque Motors
Can you do that for us?
RE: Low Speed High Torque Motors
Not only the gearbox but the shaft material and diameter should withstand that torque. A motor 5,000 HP, 8 poles at full load produces only around 30,000 Lb-ft.
RE: Low Speed High Torque Motors
Keith Cress
Flamin Systems, Inc.- <http://www.flaminsystems.com>
RE: Low Speed High Torque Motors
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