Solid-state switch mode AC-DC converters having high-frequency transformer isolation are developed in buck, boost, and buck-boost configurations with improved power quality terms of reduced total harmonic distortion (THD) input current, power-factor correction (PFC) at AC mains precisely regulated isolated DC output voltage feeding to loads from few Watts several kW. This paper presents a comprehensive study on state art factor corrected single-phase configurations, control strategies,...

This paper deals with a Cuk dc–dc converter as single-stage power-factor-correction for permanent-magnet (PM) brushless dc motor (PMBLDCM) fed through diode bridge rectifier from single-phase ac mains. A three-phase voltage-source inverter is used an electronic commutator to operate the PMBLDCM driving air-conditioner compressor. The speed of compressor controlled achieve optimum air-conditioning using concept voltage control at link proportional desired PMBLDCM. stator currents during step...

This study presents various configurations, control schemes and design of single-phase power factor controller (PFC) topologies for permanent magnet brushless DC motor (PMBLDCM) drives provides a basis selection suitable PFC topology specific application. Several AC–DC converter (buck, boost, buck–boost, Ćuk, SEPIC, Zeta, push–pull, half bridge, full bridge) based are designed, modelled applied to 1.5 kW PMBLDCM drive comparison performance. Some bidirectional bridge unipolar inverter also...

This paper deals with a comprehensive study of configurations microgrid (MG) based on variable speed generators. The selection criteria for these along the design required control algorithms, are presented in detail. Simulation results and experimental validation selected MG given to demonstrate their suitability. It is aimed enhance applications MGs main emphasis renewable energy sources ensure sustainable development rural remote areas.

In this paper, a comprehensive controller of standalone microgrid is implemented, which has three dispersed generation units based on wind, solar photovoltaic (PV) array, and diesel generator (DG). The power ratio variable step perturb observe method applied to achieve maximum point tracking PV array speed wind turbine coupled permanent magnet brushless dc without rotor/wind sensors. Moreover, ensure perfect synchronization DG the common coupling (PCC), control algorithm developed, in-phase...

The performance characteristics of a cage induction machine operating as self-excited generator (SEIG) in stand-alone mode are presented. A static capacitor bank is considered to self-excite the and maintain its terminal voltage constant. lagging reactive power requirement obtained for different load values. effect speed on excitation has also been studied. An algorithm developed achieve these using Newton-Raphson method steady-state equivalent circuit machine. analytical technique extended...

A generalised dynamic model of a delta-connected three-phase self-excited induction generator (SEIG) has been developed using d–q variables in stationary reference frame. This can handle symmetrical and unsymmetrical load capacitor configurations, however, the SEIG performance during balanced unbalanced faults studied, which include cases extreme unbalance operation. behaviour investigated considering effects main cross flux saturation for perturbation, line-to-line short circuit, opening...

The load-commutated inverter (LCI)-based synchronous motor (SM) drive that is fed by a 12-pulse ac–dc converter results in harmonics mitigation. These drives have further improved power quality at the ac mains if an appropriate passive filter used for factor (PF) correction and reduction. This paper deals with simplified optimization algorithm based on particle swarm method selection of components. to design filters three types loads LCI–SM drive, i.e., constant-torque–variable-speed loads,...

This paper presents fuzzy-2 direct torque control (F2DTC) and proportional-integral (PIDTC) of an induction motor drive (IMD) using bus-clamped space vector modulation (BCSVM). The PIDTC gives considerable flux ripples with the poor dynamic performance IMD. To improve IMD, F2DTC is proposed. In F2DTC, controllers are replaced by (F2Cs), where BCSVM duty ratios independent sampling period. firing strength inverter improved than PIDTC. addition, F2C effectively deals huge ambiguous data...

In this paper an improved power quality buck-boost converter fed permanent magnet brush less DC motor (PMBLDCM) drive is employed for adjustable speed operation of PMBLDCM. A single-phase, single-switch AC-DC topology based on non-isolated factor correction (PFC) and operated with voltage follower control in discontinuous conduction mode (DCM) sensor reduction. This PFC controller ensures near unity wide range the while restricting total harmonic distortion (THD) AC mains current within...

The manufacturing advances in semiconductor processing (continually reducing minimum feature size of transistors, increased complexity and ever increasing number devices on a given IC) change the design challenges for circuit designers CMOS technology. important are low power high speed computational devices. In this paper novel adiabatic topology is proposed. By removing diode from charging discharging path, higher output amplitude achieved also dissipation diodes eliminated. A mathematical...

This paper presents a Zeta DC-DC converter as power factor correction (PFC) which is operated in voltage control mode for speed of permanent magnet brushless DC motor (PMBLDCM). The proposed performs the PFC action and link single stage needs only one controller. current multiplier approach with average employed controller designed continuous conduction (CCM) operation. For torque PMBLDCM, rate limiter reference at link. Detailed design, modeling performance drive are presented an...

This paper presents proportional integral direct torque control (PIDTC) and neuro-fuzzy-based DTC (NFDTC) using bus-clamped space vector modulation for two-level inverter. The PIDTC provides more ripples in flux, speed, during speed/load changing conditions, also gives total harmonic distortion (THD) current of the induction motor (IM). In order to improve dynamic ripple performance IM drive, NFDTC is used which PI-controllers (speed torque) are replaced with neuro-fuzzy controls hybrid...

This article presents control strategies developed with two-level coordinated and double loop for a standalone microgrid. The interfacing inverter is controlled to perform multifunctions. It incorporates the compensation power quality problems at point of common coupling controls voltage frequency deviation provide constant connected ac loads in grid-connected operating modes. demand during battery charging discharging using buck–boost converter. To overshoot settling time while following dc...

The configuration of short-shunt self-excited induction generator feeding motor loads (SEIG-IM) suffers from excessive transients during startup load under no and unstable operation. These problems may be due to subsynchronous resonance as obtained with series compensated transmission line or the connected system. use damping resistors across capacitors is proposed damp out starting for stable steady-state model short shunt SEIG-IM resistive developed obtain values capacitances optimum...

ABSTRACT A new technique to compute the performance of self excited cage induction generator (SEIG) is presented. The proposed method for analysis SEIG capable provide in all steady state operating conditions. problem formulated as multivariable unconstrained nonlinear optimization problem. impedance equivalent circuit machine taken an objective function. frequency and magnetising reactance or capacitive reactance, are selected independent variables depending upon conditions machine. allowed...

This paper presents design and implementation of Digital Signal Processor (DSP) based induction generator controller (IGC) to regulate the voltage frequency single phase self excited (SEIG) which employs a three squirrel cage machine, suitable for stand alone power mode employing unregulated turbine such as micro-hydro generation. A machine can be used generate supply at constant if electrical load is maintained its terminals. prototype model developed that on SEIG remains despite change in...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A load-commutated inverter (LCI) fed synchronous motor (SM) is operated as an adjustable speed drive (ASD) in high-power applications. These drives are known commutatorless (CLM) and posses many promising features like high efficiency, economic operation, flexibility of control ratings. The CLM used compressors, blowers, fans, pumps, mill for a range industries mining, water treatment plants,...

This paper presents the application of three-level cascaded H-bridge (3L-CHB) inverter and neutral point clamped (3L-NPC) for induction motor (IM) drive Electric Vehicles in comparison to Two-level voltage source (2L-VSI). The complete IM is modelled simulated MATLAB Simulink environment with above three inverters variation speed torque. Comparative analysis obtained simulation results carried out all on basis common performance parameters. presented demonstrate effectiveness improvement...