One of the greatest of the advantages of a wound field motor.... No magnets to degauss. The only thing challenging really quick stops is inertia.
I was once involved in the power industry and saw the results of a mis-timmed synrconizing breaker closure on a 600 MW generator turning 3600 rpm. The inertia of the rotor which was now magnetically locked to the stator took the stator and its housing for a ride, ripping the generator from the foundation and rotating it about 45 degrees. Good news is that there is a lot of scrap copper in one of those babies. The other advantage is of course that when you have the motor running at full speed with max armature current you can go even faster by reducing the field current. You give up torque of course but the extra speed tends to keep the horsepower constant. Cecil ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
