Applications that require better low-speed smoothness than a half-step system should consider using a microstepping or ministepping solution. Microstepping systems, with resolutions of 50,000 steps/rev, can offer exceptional smoothness, without requiring a gear-reducer. Ministepping systems typically do not have wavetrimming capability or offset adjustment to achieve the optimum smoothness, but offer a great improvement over [...]
Within the various drive technologies, there is a spectrum of performance. The uni-polar resistancelimited (R-L) drive is a relatively simple design, but it lacks shaft power performance and is very inefficient. A uni-polar system only uses half of the motor winding at any instant. A bi-polar design allows torque producing current to flow in all [...]
The stepper drive delivers electrical power to the motor in response to low-level signals from the control system. The motor is a torque-producing device, and this torque is generated by the interaction of magnetic fields. The driving force behind the stator field is the magneto-motive force (MMF), which is proportional to current and to the [...]
Wenjun Wu1, Geoffrey Fox1, Hasan Bulut1 , Ahmet Uyar2, Tao Huang1
1 Community Grids Computing Laboratory, Indiana University, USA
2Department of Electrical Engineering and Computer Science, Syracuse University, USA
{wewu, gcf, hbulut, auyar, taohuang}@indiana.edu
Indiana University Research Park, 501 N Morton St. 222, Bloomington, IN, 47408, USA
Abstract
Most current Voice/Video over IP (VoIP) systems are either highly centralized or dependent [...]
