PDA

View Full Version : Dynamatic Variable Speed 1 ph. wiring info help



Tundra Twin Track
03-02-2016, 11:18 PM
Anyone have know how on wiring variable speed control to this 1ph motor tag says 115 volt or 230.

http://i1371.photobucket.com/albums/ag292/tundratwintrack/image.jpg3_zpswkwtfyq0.jpg (http://s1371.photobucket.com/user/tundratwintrack/media/image.jpg3_zpswkwtfyq0.jpg.html)

http://i1371.photobucket.com/albums/ag292/tundratwintrack/image.jpg1_zpswqakjgir.jpg (http://s1371.photobucket.com/user/tundratwintrack/media/image.jpg1_zpswqakjgir.jpg.html)

http://i1371.photobucket.com/albums/ag292/tundratwintrack/image.jpg2_zpsktmeazw0.jpg (http://s1371.photobucket.com/user/tundratwintrack/media/image.jpg2_zpsktmeazw0.jpg.html)

J Tiers
03-03-2016, 12:10 AM
http://www.dynamatic.com/products/drives/dynamatic-as-fas-drives.html

Looks like they got spun off, but are still around.

The motor will be a standard device, you will need to supply the magnetic field clutch with what it wants to work right, and you may need the right way to deal with the speed feedback.

Tundra Twin Track
03-03-2016, 11:15 AM
http://www.dynamatic.com/products/drives/dynamatic-as-fas-drives.html

Looks like they got spun off, but are still around.

The motor will be a standard device, you will need to supply the magnetic field clutch with what it wants to work right, and you may need the right way to deal with the speed feedback.

The mag clutch must take special control board ,not just reostat,I assume reversing must be done with motor.Are these high quality and bullet proof ,it appears pretty old.

RWO
03-03-2016, 01:49 PM
Ah yes, the venerable eddy current clutch. Haven't seen one if them in a long time. Back in the day when these were used in industry, the control was usually a simple analog controller comparing the driven shaft's speed from a tach generator to the desired set point. The controller varied the DC voltage to the clutch coil with a simple SCR voltage control supplied with 120VAC. VFD's made them obsolete. Eaton was the industry leader for many years. One of the plants I worked in the 70's had units from 5 to 1000 HP , mostly plastic extruders.

RWO

Tundra Twin Track
03-03-2016, 08:53 PM
Ah yes, the venerable eddy current clutch. Haven't seen one if them in a long time. Back in the day when these were used in industry, the control was usually a simple analog controller comparing the driven shaft's speed from a tach generator to the desired set point. The controller varied the DC voltage to the clutch coil with a simple SCR voltage control supplied with 120VAC. VFD's made them obsolete. Eaton was the industry leader for many years. One of the plants I worked in the 70's had units from 5 to 1000 HP , mostly plastic extruders.

RWO
Thanks Guys I think I will pass on these.

J Tiers
03-03-2016, 09:59 PM
Oh, they work fine, and are very durable, but their variable speed is somewhat load-dependent, so you really need the feedback.

Probably they are much more durable than a VFD, actually. But they don't quite serve the general purpose speed control applications that a VFD will.