Hemorrhoids is one of the most common diseases of mankind. There are different methods of treatment, but many problems and complications are associated with the use these modalities. DC electrotherapy of hemorrhoids is an alternative method which offsets many of these conditions. Two hundred and ten patients with 426 hemorrhoidal tags of different grades underwent DC electrotherapy by a DC ...

The article presents a comparison of different Direct Torque Control methods Stand-Alone Doubly Fed Induction DC-Voltage Generator, with classic field oriented control used as benchmark. system consists doubly fed induction generator the stator circuit which is connected to DC-bus diode rectifier, and rotor converter same DC bus. main problem this power generation are large torque oscillations ...

In recent years, there has been a fast growth in wind energy conversion system (WECS). There are two general types of wind turbines in WECS: fixed speed wind turbines and varying speed wind turbines.Permanent magnet synchronous generator (PMSG) is one of the most attractive generators for the varying speed turbine WECS.In this paper, a fuzzy controller is proposed to control the current source ...

Renewable energy sources like wind, sun, and hydro are considered as a reliable alternative to the traditional energy sources such as oil, natural gas, or coal. This paper describes modeling and simulations to determine a method for the power performance evaluation of autonomous wind turbine system. A speed control regulator is utilized to control the DC bus voltage. The inverter gate’s signals...

This paper presents Maximum Power Point Tracking (MPPT) controller design of Doubly Fed Induction Generator (DFIG) using Genetic Algorithm (GA). Essential feature of proposed controller is that it is used to trace the maximum power when wind speed is lower than the rated wind speed. Doubly-Fed Induction Generator DFIG has stator terminals are connected directly to the grid. However, the rotor t...

Generator merupakan salah satu jenis mesin listrik yang banyak digunakan pada sistem pembangkit tenaga listrik. Namun, seringkali generator memiliki efisiensi daya rendah akibat kondisi pembebanan maupun gangguan. Untuk mengoptimalkan generator, terdapat berbagai cara satunya dengan maximum power point tracking (MPPT). Pada penelitian ini, MPPT untuk memaksimalkan keluaran magnet permanen (PMSG...

hemorrhoids is one of the most common diseases of mankind. there are different methods of treatment, but many problems and complications are associated with the use these modalities. dc electrotherapy of hemorrhoids is an alternative method which offsets many of these conditions. two hundred and ten patients with 426 hemorrhoidal tags of different grades underwent dc electrotherapy by a dc gene...

This paper proposes a simple and efficient PI controller for single-phase grid-connected PV generator. The controller ensures the system operation at maximum power point (MPP) irrespective to atmospheric conditions. A detailed design of the controller and DC capacitor were carried out. An averagevalue model was developed to facilitate the design of the controller and to study the system perform...

This work mainly focuses on Matlab Simulink model for electronic commutation of BLDC motor and co simulation of the model by using Xilinx System generator tool. The BLDC motors (AKM21E) are available in small size with good speed/torque characteristics. Since, the efficiency and dynamic response is high compared to brushed DC motor, they have widely used in various applications. We are using BL...