This work develops a comprehensive approach to the control of inverter-fed synchronous reluctance machines (SYNCREL), based on machine's ideal model. From theory simulation is designed. Simulation and experimental results are presented. The effects saturation iron losses briefly considered.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

This paper is concerned with flux and voltage vector-oriented control of a promising brushless doubly fed reluctance machine (BDFRM) for generator drive systems limited adjustable speed ranges (e.g., wind turbines and/or pump drives). The BDFRM has been receiving increasing attention because the low capital operation maintenance costs afforded by using partially rated power electronics high reliability design. Furthermore, it potential to offer competitive performance its well-known...

Brushless doubly fed induction machines (BDFIMs) have been extensively researched over because of the possibility using a partially rated inverter in many applications with limited speed variations. However, special cage rotor construction and substantial losses is one key deficiencies these machines. A similar extremely interesting machine, brushless reluctance machine (BDFRM), has largely ignored comparison. This was mainly due to fact that designs were not capable generating saliency...

This paper presents the conceptual analysis, comparative simulation, and experimental evaluation of voltage flux vector-oriented control a promising low-cost brushless doubly-fed reluctance generator (BDFRG) technology for variable-speed wind turbines with maximum power point tracking. The BDFRG has been receiving increasing attention because use partially rated electronics high reliability design, while offering performance competitive to its popular slip-ring counterpart, induction...

Distinct from the conventional machines with only one electrical and mechanical port, featuring multiple electrical/mechanical ports (the so-called multiport machines) provide a compact, flexible, highly efficient manner to convert and/or transfer energies among different ports. This paper attempts make comprehensive overview of existing topologies, fundamental characteristics advanced modeling, analysis, control, particular emphasis on extensively investigated brushless doubly fed for...

The brushless doubly-fed machine(BDFM) is a family of multiport electric machines with two ac electrical ports and common mechanical port. Different from the conventional singly-fed whose synchronous speed solely determined by single supply frequency actual pole pair number, BDFM has frequencies different numbers to control rotor speed. By accessible ports, all BDFMs are endowed more degrees freedom for power control, inherent fault-tolerant capability high reliability. in its broad sense...

The brushless doubly fed generator (BDFG) shows the great potential for use in large variable speed wind turbines due to its high reliability and cost benefits of a partially rated power electronics converter. However, it suffers from compromised efficiency factor comparison with conventional induction or synchronous generators. Therefore, optimizing BDFG, especially rotor, is necessary enhancing torque density market competitiveness. In this paper, novel cage-assisted magnetic barrier...

The brushless doubly fed reluctance machine (BDFRM) is the least known of a group electrical machines that include classic cascaded induction machine, doubly-fed (BDFIM), and double-fed slip ring (DFSRIM). Since its initial development some 30 years ago, BDFRM has been largely ignored because performance limitations imposed by rotor design. However, improvements in rotors, by-product synchronous have resulted renewed interest BDFRM. This together with promise higher efficiency simpler...

The brushless doubly fed induction machine (BDFIM) has been extensively researched for approximately 30 years, but a related [the reluctance (BDFRM)], not. This was mainly due to the fact that rotor designs were not capable of generating saliency ratios large enough make BDFRM competitive with other machines. However, recent developments in rotors, spurred on by research into synchronous machines, resulted high ratio rotors are economic build. This, together promise higher efficiency and...

The brushless doubly fed reluctance machine (BDFRM) is related to the better known induction (BDFIM). Research into machines motivated by fact that they allow use of a partially rated inverter in many variable-speed applications. BDFRM has been largely ignored comparison BDFIM, despite it potential for greater efficiency as compared and rotor simpler manufacture. This paper compares its singly cousin, synchronous machine. natural since both same rotor. first part establishes relationships...

A family of multiphase, pulse-width-modulated (PWM) step-down converters that exhibit high input-to-output voltage conversion ratios is introduced. The proposed operate with larger duty cycles and lower stresses on the switches than their conventional converter counterparts making them suitable for applications in high-frequency, nonisolated point-of-load employed powering today's microprocessors.

The paper proposes a direct torque control (DTC) algorithm suitable for low-variable-frequency operation of the brushless doubly fed reluctance machine (BDFRM) and considers aspects its practical implementation. simulation experimental results show that small BDFRM prototype can successfully operate down to zero supply frequency inverter-fed (secondary) winding, unlike cage induction or many other alternating current machines with DTC. This advantage is consequence using flux estimation...

The study considers aspects of scalar V/f control, vector control and direct torque (and flux) (DTC) the brushless doubly fed reluctance machine (BDFRM) as a promising cost-effective alternative to existing technological solutions for applications with restricted variable speed capability such large pumps wind turbine generators. Apart from providing comprehensive literature review analysis these methods, development results experimental verification, an angular velocity observer-based DTC...

The paper presents the development and experimental validation of a novel angular velocity observer-based fieldoriented control algorithm for promising low-cost brushless doubly-fed reluctance generator (BDFRG) in wind power applications.The BDFRG has been receiving increasing attention because use partially-rated electronics, high reliability design, competitive performance to its popular slip-ring counterpart, induction (DFIG).The controller viability demonstrated on laboratory test...

A new high-performance sensorless speed vector controller that implements the maximum torque per ampere control strategy for inverter-driven synchronous reluctance machine is presented in this paper. It based on a parameter-dependent technique online estimation of rotor position and angular velocity at rate. The current ripple principle used to estimate position. estimates are fed conventional closed-loop observer predict velocity. very high accuracy algorithm both low speeds confirmed by...

The paper will put a forward description of realistic design for brushless doubly-fed machine that is practical value. It takes the form 4-pole / 8-pole aimed use in 2 MW wind turbine over correct speed and torque range. Previous examples discussed laboratory machines this study outcomes from these studies to formulate procedure sizing designing machine. latest analysis techniques are used, with rotor ducting considered. Control also addressed paper, particular assessment sensorless reactive...

A novel shaft-position sensorless algorithm for decoupled control of torque and reactive power (TRPC) doubly fed machines, such as the classical wound-rotor induction machine (DFIM) emerging brushless reluctance (BDFRM), has been discussed experimentally verified in this paper. The underlying concept is derived from first principles magnetization production machines. For purposes, only grid-connected winding measurements rough knowledge its resistance value are required. Such a weak...

A recently proposed shaft position sensorless method for torque and reactive power control of the brushless doubly fed reluctance machine has proven successful in simulation studies. In this paper, its real-time performance been evaluated on a custom-designed prototype. The preliminary experimental results have confirmed viability scheme represent serious step toward development generic virtually parameter independent controller excited machines. wide range applications is possible,...

An extended vector control method for the operation of a brushless doubly fed reluctance generator-based wind energy conversion system under unbalanced grid voltage conditions is proposed. The modified scheme has capability to positive and negative sequences inverter-fed winding (secondary) currents independently. primary aim this work evaluate effectiveness algorithm in case asymmetrical voltages. Since large-scale generators type are not yet available, Hardware-in-the-Loop testing...

A new high performance sensorless speed vector controller that implements the maximum torque per ampere control strategy for inverter driven synchronous reluctance machine is presented in this paper. It based on a parameter dependent technique on-line estimation of rotor position and angular velocity at rate. The current ripple principle used to estimate position. estimates are fed conventional closed-loop observer predict velocity. very accuracy algorithm both low speeds confirmed by...