The matrix converter system is competitive solution to replace the conventional two stage ac to ac converter. In this paper, a matrix converter driving a speed-controlled induction machine is examined under open-switch fault. First, a-predictive direct torque method is proposed using only the motor torque and current. Second, a motor speed control is presented. The proposed techniques do not re...

The bias dependence of the torque that a spin-polarized current exerts on ferromagnetic elements is important for understanding fundamental spin physics in magnetic devices and for applications. Several experimental techniques have been introduced in recent years in attempts to measure spin-transfer torque in magnetic tunnel junctions. However, these techniques have provided only indirect measu...

Electrons and other fundamental particles have an intrinsic angular momentum called spin. A change in the spin state of such a particle is therefore equivalent to a mechanical torque. This spin-induced torque is central to our understanding of experiments ranging from the measurement of the angular momentum of photons and the g-factor of metals to magnetic resonance and magnetization reversal i...

Many investigators have demonstrated that in swing motions such as ball-throwing, the motion of the proximal joint (shoulder) produced assistive interaction torque for the distal joint (elbow). In line with these studies, the shoulder and elbow motions would be expected to produce the assistive interaction torque for the wrist joint as well. However, we recently showed that the interaction torq...

[Purpose] The purpose of this study was to provide information regarding the knowledge of mechanical principles related to the load applied to the shoulder and elbow during the pitching motion. [Subjects and Methods] The three-dimensional kinematics of body segments were measured in 19 amateur baseball players with a VICON motion capture system. The correlation between maximum shoulder internal...

The tapered implant-abutment interface is becoming more popular due to the mechanical reliability of retention it provides. Consequently, understanding the mechanical properties of the tapered interface with or without a screw at the bottom has been the subject of a considerable amount of studies involving experiments and finite element (FE) analysis. This paper focuses on the tapered implant-a...

The development of powered assistive devices that integrate exoskeletal motors and muscle activation for gait restoration benefits from actuators with low backdrive torque. Such an approach enables to assist as needed while maximizing the joint torque muscles, contributing movement, facilitating ballistic motions instead overcoming passive dynamics. Two electromechanical were developed determin...

2014 A mechanical oscillator is used to study phase conjugation : the phase conjugate part of the response of an anharmonic oscillator excited simultaneously by an intense torque and a weak probe torque is calculated. The connections with third order Non Linear Optics susceptibility tensor is presented. Revue Phys. Appl. 17 (1982) 645-648 OCTOBRE 1982, PAGE Classification Physics Abstracts 42.6...

In order to improve the alignment stability of air vibration isolation device a high-powered main engine, we established mechanical model for system and analyzed deviation decoupling conditions system. Additionally, an optimized design method dual-direction support isolators positioned symmetrically on engine was proposed. The resultant showed that when compared conventional inclined springs en...