In this study an improved direct torque control method (DTC) for Axial-flux hysteresis motor speed controlling is investigated. Time-consuming and dangerously of the necessity to manually adjust the motor speed and voltage when motor lagging occurs are the main drawback of the conventional control methods. The proposed method under acceleration and sequential braking on the Axial-flux hysteresis motor, based on the extracted modified motor dynamic equations in the Simulink Matlab environment has been simulated. As the results show, by using the proposed direct torque control method, the speed of the motor in the consecutive acceleration and braking process is controlled and the referral speed throughout the process operation with high accurate has been followed. Also this control system has shown that it is reliable method and stable against disturbances. Compared with conventional vector control methods, less complexity, higher speed and accuracy and easier implementation ability are significant features of the proposed method. تفاصيل المقالة

     In This study, a label-free detection method by using a novel Optofluidic ring resonator sensor (OFRR) structure is presented. Optofluidic is a developed young research subject suitable to create an appropriate cooperation between optics and fluidics. The combination of fluidic and optical methods achievable. by using the optofluidic methods makes it expedient to obtain an inventive type of sensors, which have been tried to have an ameliorate sensitivity, denseness and adaptivity.  OFRR is a recent detection method that integrates Optic and fluid technologies with low-limit and low-cost and small- sample volume detection sensitivity. The objective of this article is the detection of the tuberculosis by offering a unique and a novel useful structure that is able to fabricate. The material of the proposed structure is PDMA that is completely flexible polymer. The width of the waveguide, the waveguide length and width of the ring of the proposed structure respectively is 500nm, 250 nm, 1500 nm. Also, the inner radius of the resonator ring in 4700 nm. The simulation Result of proposed structure by Opti-FDTD software shown 649 nm/RIS for the slope of the sensitivity curve. تفاصيل المقالة