To solve the problems of torque ripple and inconstant switch frequency of inverter in the conventional direct torque control (DTC), a novel DTC method using space vector modulation (SVM) is proposed based on input– output feedback linearization technique, where hysteresis controller is substituted by input–output feedback linearization and switch table is substituted by SVM. In order to preserv...

BACKGROUND Knowing the postsurgery thyroglobulin (Tg) kinetic would enable its rationale for use in patients with differentiated thyroid cancer (DTC). Heterogeneous results were previously reported, then we aimed to evaluate the postsurgery Tg kinetic in a large group of patients with DTC. METHODS Enrolled were 96 patients with DTC. Serum Tg was measured first at 5 minutes, then at 24, 48, 72...

Since torque ripple is the main cause of noise and vibrations, the performance of Switched Reluctance Motor (SRM) can be improved by minimizing its torque ripple using a novel control technique called Direct Torque Control (DTC). In DTC technique, torque is controlled directly through control of magnitude of the flux and change in speed of the stator flux vector. The flux and torque are maintai...

The direct torque control theory has achieved great success in the control of permanent magnet synchronous motor. A Direct Torque Control (DTC) scheme of Permanent Magnet Synchronous Motor (PMSM) is presented. Based on in-depth analysis of PMSM mathematical model in abc frame and αβ frame are established and the operation principle of DTC-SVPWM system, the relationships between the torque and f...

Induction motors are most commonly used motor type in industrial applications because of its well-known advantages like robust structure, cheaper prices etc. Today, field oriented control (FOC) and direct torque control (DTC) methods, also called vector control, are most famous control methods in high-performance applications. The main structural and behavioural differences between the both met...

Currents were elicited by acetylcholine (ACh), by d-tubocurarine (dTC), and by mixtures of ACh and dTC, from stably transformed fibroblasts that express fetal or adult muscle nicotinic receptors. dTC acted as an antagonist of ACh for activation of adult-type receptors, whereas it acted as a weak partial agonist at fetal-type receptors. The channel-blocking action of dTC was not apparent at the ...

DTC is strategy of selecting proper stator voltage vectors to reduce torque error and flux error. DTC uses hysteresis band controller whose control action has no difference between large torque error and small one. This results in high torque ripple. In order to reduce the torque ripple and to improve the performance of DTC, DTC based on Fuzzy Logic is proposed in this paper. The simulations ar...

PURPOSE Clinical significance of disseminated tumor cells (DTC) in bone marrow of early breast cancer patients has been reported, but improvements in detection methods are needed. EXPERIMENTAL DESIGN Bone marrow aspirates from 621 patients with stage I to III breast cancer were screened for cytokeratin-positive (CK+) cells. CK+ cells were categorized into DTC only if they had specific morphol...

1This paper presents a new speed observer for high performance FOC (Field Oriented Control) and DTC (Direct Torque Control) induction motor drives. It is an MRAS (Model Reference Adaptive Systems) observer which employs a linear ANN (Artificial Neural Network) for the estimation of both the rotor speed and the flux-linkage. The training of the ANN based adaptive model of the MRAS observer is pe...

Purpose – The purpose of this study is to provide an overview of the economic and clinical impacts of direct-to-consumer (DTC) advertising on consumers and physicians. Design/methodology/approach – Controversy around the benefits and concerns associated with DTC advertising are summarized. The sources are sorted based on their position toward DTC promotions: defending or opposing. Two recent wo...