The doubly-fed generators (DFIG) have clear superiority for the applications of large capacity and limited-range speed control case due to the partially rated inverter, lower cost and high reliability. These characteristics enable the doubly-fed wound rotor induction machine to have vast applications in wind-driven generation.In this paper Combined Vector and direct power control (CVDPC) strate...

This study examined the step-down DC-DC converter with high-efficiency appropriate for hybrid vehicles. The above described converter supplies power to electronic components such as headlights and air conditioners by replacing an electric generator of an internal combustion engine and converting the high voltage of a main battery to low voltage (12 V). In this study, the development specificati...

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 ...

An integrated dc/rf photoelectron gun produces a lowemittance beam by first rapidly accelerating electrons at a high gradient during a short (~ 1 ns), high-voltage pulse, and then injecting the electrons into an rf cavity for subsequent acceleration. Simulations show that significant improvement of the emittance appears when a high field (~ 0.5 – 1 GV/m) is applied to the cathode surface. An ad...

This paper shows a new concept to generate medium voltage (MV) in wind power application avoid an additional transformer. Therefore, the generator must be redesigned with constraints and topology for rectifier system by using multiple low (LV) rectifiers connected series parallel increase DC output voltage. The combination of connection is further introduced as DC-cascade. With resulting DC-cas...

This paper presents a buck-boost converter-based bipolar pulse generator, which is able to generate bipolar exponential pulses across a resistive load. The concept of the proposed approach depends on operating the involved buck-boost converters in discontinuous current conduction mode with high-voltage gain and enhanced efficiency. A full design of the pulse generator and its passive components...

Abstract— In Hazardous environment industries where the emission of toxic gases and effluents will have an impact on the health of the operators, the recording of health parameters of individual operators is very important. In such situation the health monitoring of operators are being monitored and processed centrally by a server and this can be powered by a system of batteries which can be op...