I'm building an application where some 50 asynchronous 3PH 400V 50Hz motors with powers between 2.2 and 1.1 kW are connected to the same mains. Each one of the motors is controlled by a VFD, as they have to run at different speeds in the range 1500 to 3000 rpm.
Not being a motor control expert...
I'm looking for a membrane that would be porous to air in one direction end tight in the opposite one.
This would ideally be like a plastic sheet for polyethylene bags, but anything working as above would be interesting.
Any ideas?
prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
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I am building a prototype plotter for an industrial application: it has to plot onto a steel table 13x1.2 m the contours of prefabricated concrete slabs.
I would like to use as the ink for this machine a liquid based onto ethylene glycol (the kind that's used as antifreeze for cars) because the...
