This paper addresses the active torque ripple compensation of a permanent magnet brushless direct-current motor (PMBLDC) drive with new pulse width modulation (PWM) technique and advance angle method. Torque is well-known problem in BLDC motors which produced by discrepancy between stator current back electromotive force (back-emf) waveforms. The advanced method proposed this generates maximum ...

Phase advance errors between interaction points (IP) break the symmetry of multi-IP colliders. This symmetry breaking introduces new, lower order resonances which may change the halo from the beam-beam interaction dramatically. In this paper, the mechanism of introducing new resonances is discussed. Simulation results showing the changes due to phase advance errors are presented. Simulation res...

For small excursions of an electron within a continuous focusing ion channel, the phase advance of the socalled betatron oscillations of that electron–equivalent to the number of oscillations per unit length of that electron about the central restoring force of the ion’s space-charge force in the blowout regime–are independent of the (negligible) amplitude of its radial excursion. Here, we comp...

We analyze the experimental time series of internal pressure in a four cylinder spark ignition engine. In our experiment, performed for different spark advance angles, apart from the usual cyclic changes of engine pressure we observed additional oscillations. These oscillations are with longer time scales ranging from one to several hundred engine cycles depending on engine working conditions. ...

AIM Evaluate the association between phase angle and the development of hepatic encephalopathy in the long-term follow-up of cirrhotic patients. METHODS This was a prospective cohort study. Clinical, nutritional and biochemical evaluations were performed. Mann-Whitney's U and χ2 tests were used as appropriate. Kaplan-Meier curves and Cox proportional Hazards analysis were used to evaluate the...

National Bureau of Standards Gaithersburg, MD 20899 To provide a phase meter calibration service, a phase angle calibration standard has been developed at NBS. This standard is a signal. generator with two sinusoidal outputs and uses direct digital synthesis to generate the signals. The phase angle between the two sinusoids is determined by the input parameters in the calculation of the sets of...

We studied the effect of auditory training on the 40-Hz auditory steady-state response (ASSR) known to localize tonotopically to the region of primary auditory cortex (A1). The stimulus procedure was designed to minimize competitive interactions among frequency representations in A1 and delivered target events at random times in a training window, to increase the likelihood that neuroplastic ch...

The use of the phase change material (PCM) as a storage medium represents an important advance to store energy for absorption cooling systems when solar is not available; however, temperature tank key parameter adequate operation system. This paper presents parametric analysis flat and commercial plate heat exchangers with MgCl2·6H2O PCM at conditions. exchanger (PHE) chevron type angle 45° are...