On Tue, 2011-09-06 at 22:40 +0300, Andrew wrote: ... snip > Andy, I noticed that some of the motors are brushless *DC* servo. It's not > the same as *AC* servo, is it? ... snip
I believe the only difference is in the shape of the relative magnetic fields between the armature and stator. Brushless DC motors have a more trapezoidal or constant torque per unit input current, similar to commutator switching in DC motors with brushes. Brushless AC motors have a sine wave like input current for a constant torque output. Since we tend to use feedback loops for EMC2 servos, AC or DC type motors should work the same since non-ideal torque will be corrected, but I haven't done much work with brushless motors so I'm not an expert. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Malware Security Report: Protecting Your Business, Customers, and the Bottom Line. Protect your business and customers by understanding the threat from malware and how it can impact your online business. http://www.accelacomm.com/jaw/sfnl/114/51427462/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
