Modeling and Analysis of Four Quadrant Sensorless Control of a Switched Reluctance Machine Over the Entire Speed Range - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Modeling and Analysis of Four Quadrant Sensorless Control of a Switched Reluctance Machine Over the Entire Speed Range write by Ahmed O. Khalil. This book was released on 2005. Modeling and Analysis of Four Quadrant Sensorless Control of a Switched Reluctance Machine Over the Entire Speed Range available in PDF, EPUB and Kindle. "The excitation of the switched reluctance motor (SRM) phases needs to be carefully synchronized with rotor position to obtain an acceptable drive performance. Therefore, rotor position sensing is an integral part of the SRM drives control. Additionally, for precise torque and speed control applications, it is necessary to have rotor position information with reasonably good resolution and high degree of accuracy. Sensorless control methods are an attractive approach in which the rotor position is sensed indirectly without a discrete mechanical position sensor. In the past, several methods have been developed to replace the discrete position sensor. Some of these methods are inductance based while others are flux based. Unfortunately, all of them were confined with the estimation to a limited range of speed and for only one quadrant operation. This dissertation develops a four-quadrant sensorless controller for SRM drives functioning over low and high speeds, including zero speed, with a high resolution position information over the entire speed range. This four-quadrant sensorless controller combines two different methods. At zero and low speeds, a pulse injection position estimation method is used to estimate the rotor position in all four quadrants. At high speeds, a sliding mode observer (SMO) based position and speed estimation is used and combined to work with the low speed algorithm. The transition between the algorithms is smooth and transparent to the inner loop torque controller. The accuracy and resolution of the sensorless controller developed in the research has been enhanced through the use of a novel switched reluctance (SR) machine model based on the Fourier series expansion that is accurate and invertible. This model, derived from machine geometry and materials properties, is accurate enough to be used for actual machine representation, and can also be simplified for real time sensorless controller application. The model predicts both the inductance and flux linkage accurately for use in various sensorless control algorithms. The experimental tests performed showed accurate position estimation using the new Fourier model. The error analysis performed in this research demonstrated the superiority of the Fourier model over the models developed in previous research."--Iii-iv.
Power Electronics and Motor Drives
Power Electronics and Motor Drives - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Power Electronics and Motor Drives write by Bogdan M. Wilamowski. This book was released on 2018-10-03. Power Electronics and Motor Drives available in PDF, EPUB and Kindle. The Industrial Electronics Handbook, Second Edition combines traditional and newer, more specialized knowledge that will help industrial electronics engineers develop practical solutions for the design and implementation of high-power applications. Embracing the broad technological scope of the field, this collection explores fundamental areas, including analog and digital circuits, electronics, electromagnetic machines, signal processing, and industrial control and communications systems. It also facilitates the use of intelligent systems—such as neural networks, fuzzy systems, and evolutionary methods—in terms of a hierarchical structure that makes factory control and supervision more efficient by addressing the needs of all production components. Enhancing its value, this fully updated collection presents research and global trends as published in the IEEE Transactions on Industrial Electronics Journal, one of the largest and most respected publications in the field. Power Electronics and Motor Drives facilitates a necessary shift from low-power electronics to the high-power varieties used to control electromechanical systems and other industrial applications. This volume of the handbook: Focuses on special high-power semiconductor devices Describes various electrical machines and motors, their principles of operation, and their limitations Covers power conversion and the high-efficiency devices that perform the necessary switchover between AC and DC Explores very specialized electronic circuits for the efficient control of electric motors Details other applications of power electronics, aside from electric motors—including lighting, renewable energy conversion, and automotive electronics Addresses power electronics used in very-high-power electrical systems to transmit energy Other volumes in the set: Fundamentals of Industrial Electronics Control and Mechatronics Industrial Communication Systems Intelligent Systems
Modeling and Control of Switched Reluctance Machines for Four-quadrant Operation
Modeling and Control of Switched Reluctance Machines for Four-quadrant Operation - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Modeling and Control of Switched Reluctance Machines for Four-quadrant Operation write by Sandeep Narla. This book was released on 2010. Modeling and Control of Switched Reluctance Machines for Four-quadrant Operation available in PDF, EPUB and Kindle. The switched reluctance machine (SRM) is receiving renewed attention as a viable candidate for various adjustable speed and high torque applications such as in the automotive, traction and aerospace industries. The unique feature of a SRM is its relatively simple mechanical structure; the rotor does not carry any windings, commutators or permanent magnets. The maintenance free usage makes it a good choice over other DC or AC drives. The software modeling and hardware testing of SRM, for four-quadrant operation, and the development of an optimum commutation angle controller for low output current ripple, and efficient battery charging using the switched reluctance generator (SRG) is presented in this thesis. Two different SRM models are simulated for controller development. One of the models is the geometry based machine model by A. Radun, which is used to develop the operation logic for four-quadrant control of a three-phase 12/8 pole SRM. The second model is based on torque and flux data generated through finite element analysis using the software Flux2D for the three-phase 12/8 SRM. Simulation results obtained from the models were used to develop a control strategy to adapt the commutation angles in real-time for efficient battery charging with minimized current ripple. Two digital controllers namely, the turn-on angle controller for regulating the charging current and the turn-off angle controller for minimizing current ripple (adjusting algorithm) are developed to deliver the desired output power. The controller algorithm is implemented in a TI digital signal processor (DSP) for real-time controls. The SRM power and control hardware cards are integrated into a complete SRM drive system for experimental verification. The experimentally obtained commutation angles are compared with the data table generated from simulation results.
Electronic Control of Switched Reluctance Machines
Electronic Control of Switched Reluctance Machines - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Electronic Control of Switched Reluctance Machines write by TJE Miller. This book was released on 2001-05-18. Electronic Control of Switched Reluctance Machines available in PDF, EPUB and Kindle. Switched reluctance motors have steadily increased in commercial importance since their introduction in the early 1980's, while their technology - especially of their electronic control - has made great progress. Their unique characteristics introduce a delicate balance, in which the copper and iron are diminished in quantity, complexity and cost, in favour of a greater reliance on sophistication in the controller. Thus mastery of the control is the key challenge in the application of these machines. This book is intended for engineer's in industry and in the large research community in electrical machines and drives. It introduces the techniques for controlling switched reluctance machines, starting from first principles and building up to the most advanced forms of sensorless control. It covers the recent advances in electronic control and includes aspects of motion control, automation, acoustic noise reduction and energy efficiency. Covers the recent changes in control technology Includes up-to-date equipment and methods Contains applications and case studies
Modelling and Control of Switched Reluctance Machines
Modelling and Control of Switched Reluctance Machines - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Modelling and Control of Switched Reluctance Machines write by Rui Araújo. This book was released on 2020-09-09. Modelling and Control of Switched Reluctance Machines available in PDF, EPUB and Kindle. Today, switched reluctance machines (SRMs) play an increasingly important role in various sectors due to advantages such as robustness, simplicity of construction, low cost, insensitivity to high temperatures, and high fault tolerance. They are frequently used in fields such as aeronautics, electric and hybrid vehicles, and wind power generation. This book is a comprehensive resource on the design, modeling, and control of SRMs with methods that demonstrate their good performance as motors and generators.
