High penetration of wind power into the grid necessitates coordinated action energy conversion systems and grid. A suitable generation control is required to fulfill integration requirements, especially during faults. system using a pair voltage source converters with squirrel cage induction generator coupled turbine proposed provide fault ride-through threefold used for providing effective via...

Flow separation is ubiquitous in turbomachinery. Compared with the more mature turbomachinery flow control method where medium gas, liquid cannot be controlled well. In this study, according to principle of aircraft fowler flap, taking stator blade hydraulic torque converter as basic research object, shape fitted Joukowsky transformation, and then it slotted. Computational fluid dynamics used p...

Lateral tower vibrations of offshore wind turbines are normally lightly damped, and large amplitude vibrations induced by wind and wave loads in this direction may significantly shorten the fatigue life of the tower. This paper proposes the modeling and control of lateral tower vibrations in offshore wind turbines using active generator torque. To implement the active control algorithm, both th...

The purpose of this study is to enhance the accuracy direct power/torque control (DPC/DTC) applied back-to-back converters supplying a doubly fed induction generator (DFIG) based wind power system. Two solutions are proposed. first one increase degree freedom DTC and DPC by implementing three-level converters. Fuzzy logic second solution performances both conventional control, leading in decrea...

This paper presents Electric Vehicle (EV) propulsion using a three phase squirrel cage induction motor. The motor control at different operating conditions is carried out by a direct torque control technique with an energy optimization strategy. The operating flux of the motor is chosen optimally using model based control strategy. Simulation tests have been carried out using MATLAB SIMULINK to...

introduction: some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. the aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet. methods: 40 iti implants were placed in acrylic blocks and divided into 4 groups. in groups one and two, 10 iti one...

Technological developments are increasingly rapid, especially in the field of transportation, electric vehicles, which triggered by increasing scarcity fossil fuels. One propulsion engines that widely used vehicles is brushless direct current (BLDC) motor because this has high torque, constant speed and easy to regulate. This study aims design a BLDC control using boost converter as voltage inc...

The purpose of this paper is to study the mechanism and improve prediction accuracy transient torque converter cavitation flow by application scale-resolving simulation (SRS) methods with particular focus on vortex flow. Firstly, numerical analysis entire internal field was carried out using different turbulence models, hydraulic characteristics adopted models analyzed validated via test data. ...

The modular multilevel converter (MMC) is a promising topology for medium-voltage drive applications due to its high-quality output waveforms, low device switching frequency and voltage rating. However, the large cell capacitor ripple severe challenge faced by MMC at motor speeds. Recently, hybrid (HMMC) proven be competitive solution because of lower no common-mode (CMV) problem compared with ...