This paper presents the optimal operation of a photovoltaic pumping system. The operation of a permanent magnet brushless DC motor driving a centrifugal pump is investigated. The motor is controlled through a hysteresis current loop and an outer speed loop with a PI type controller. The proportional and integral gains are set to their optimal values. In order to optimise the overall system effi...

The interdisciplinary nature of complex design poses the challenge of computational burden due to complexity of the problem. In view of this a design methodology has been proposed in this work. The primary goal of the proposed methodology is to simplify and shorten the design process. Within this work a framework is presented in which modelling, multiobjective optimisation and multi criteria de...

Permanent Magnet Brushless DC motors are used wide applications in industries due to their high power density and easy to control. These motors are generally controlled using a three phase power semiconductor bridge. For starting and to provide proper commutation sequence to turn on the power devices in the inverter bridge the rotor position sensors are required. Based on the rotor position, th...

Permanent magnet brushless DC (PMBLDC) motors are the latest choice of researchers due to their high efficiency, silent operation, compact size, high reliability and low maintenance requirements. These motors are preferred for numerous applications; however, most of them require sensorless control of these motors. The operation of PMBLDC motors requires rotor-position sensing for controlling th...

Brushless DC Motors have a permanent magnet rotor and the stator winding are wound such that the back electromotive force (EMF) is trapezoidal. The motor posses high Torque/weight ratio, operate at very high speed, very compact & electronically controlled. In this paper, we have to use three algorithms ZN, GA & PSO respectively. On the basis of performance of these three techniques, PSO have hi...

A wavelet transform on the negative half real axis is developed using an averageinterpolation scheme. This transform can be used to perform causal wavelet processing, such as signal denoising, with a small delay. The delay required to obtain acceptable denoising levels is decreased by using a redundant transform instead of a non-redundant one. Results from the experimental implementation of the...

The brushless synchronous generator (SG) excitation system consists of a main exciter, permanent magnet (PMG) consequent rotor poles type, and an automatic voltage regulator (AVR). Both exciter machines have been properly designed analysed. performances are obtained by time stepping finite-element method (FEM) coupled with the external electrical circuit. An experimental machine is built measur...

The space vector modulation (SVPWM) of Brushless DC motor (BLDC) is different from that of permanent magnet synchronous motor for its turn-off phase and trapezoidal back electromotive force. To overcome these problems, a SVPWM method is presented in this paper. The application of SVPWM to Brushless AC drives has been investigated extensively. This paper describes its application to BLDC drives ...

In classical control of brushless dc motors, flux distribution is assumed trapezoidal and fed current is controlled rectangular to obtain a desired constant torque. However, in reality this assumption may not be correct due to nonuniformity of magnetic materials and design trade-offs. These factors together with current controller limitation, can lead to an undesirable torqueripple. Hence torqu...

This paper describes the design of a direct-drive permanent-magnet generator for use in a novel sea-wave electrical generator. The basic system is briefly described and the target specification derived from the device and the wave tank performance. The design for the brushless permanent-magnet generators is then developed using SPEED PC-BDC and verified using finite element analysis (PC-FEA). A...