axial flux permanent magnet (afpm) machines are attractive candidates for electric vehicles (evs) applications due to their axial compact structure, high efficiency, high power and torque density. this paper presents general design characteristics of afpm machines. moreover, torque density of the machine which is selected as main objective function, is enhanced by using genetic algorithm (ga) a...

25 We permanently deal with gravity force. Experimental evidences revealed that moving 26 against gravity strongly differs from moving along the gravity vector. This directional 27 asymmetry has been attributed to an optimal planning process that optimizes gravity force 28 effects in order to minimize energy. Yet, only few studies have considered the case of vertical 29 movements in the context...

OBJECTIVE The aim of this study was to compare torque expression in active and passive self-ligating and conventional brackets. METHODS A total of 300 segments of stainless steel wire 0.019 x 0.025-in and six different brands of brackets (Damon 3MX, Portia, In-Ovation R, Bioquick, Roth SLI and Roth Max) were used. Torque moments were measured at 12°, 24°, 36° and 48°, using a wire torsion dev...

1 Grad. stud., Univ. of Michigan (UM) & intern, United Tech. Res. Center (UTRC). 2 Research eng., UTRC. 3 Prof., UM. ABSTRACT This paper studies the combined optimization of an elevator’s design (plant) and LQG controller for ride comfort. Elevator dynamics and primary vibration sources (drive motor torque ripple and guide rail irregularity) are modeled using an object-oriented language. The re...

Optimized shaping of the stator current in the switched reluctance motor drive can be used to mitigate electromagnetic torque ripple and decrease the rms current. Previously, optimal current waveshaping has been based upon defining the optimal current waveform as a set of discrete points and interpolating intermediate points. In this work, an alternate approach is employed in which the current ...

Synchronous Motors F. Aghili and M. Buehler J. M. Hollerbach Dept. Mechanical Engineering Dept. Computer Science McGill University University of Utah Montr eal, QC H3A 2A7, Canada Salt Lake City, UT 84112, USA ffarhad,[email protected] [email protected] Abstract This paper presents a new model for torque generation of synchronous motors and their control based on Fourier coe cients. Since mu...

A model predictive controller for optimal braking of a road vehicle is proposed. Taking into account the additional information provided by a torque sensor located in the wheel, there is no need to use any longitudinal model of the vehicle. Instead, we detail a way to identify a tire/road characteristic. This on-line reconstruction is based on an estimation of the longitudinal wheel slip and an...

This paper investigates the influence of the rotor structure on torque and flux weakening region of V-shape IPM (interior permanent magnet) machine from TOYOTA PRIUS type, more specifically, keeping always the same magnet volume, the effect of the open angle between the two magnet segments of each V-shape pole on the machine performance is studied. Moreover, in order to examine the impact of ph...

Variable speed wind turbines are designed to follow wind speed variations in low winds in order to maximize aerodynamic efficiency. Unfortunately, uncertainty in the aerodynamic parameters may lead to sub-optimal power capture in variable speed turbines. Adaptive generator torque control is one method of eliminating this suboptimality; however, before adaptive control can become widely used in ...

The paper deals with modeling of synchronous reluctance motor (SynRM) accounting for all phenomena responsible for torque ripple. Based on winding function approach, the proposed model consists in computing self and mutual inductances considering no sinusoidal distribution of stator windings, slotting effect and no sinusoidal reluctance variation caused by the rotor saliency. Then, optimal curr...