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| Author | : Răzvan Ancuţi |
| Publisher | : |
| Total Pages | : 212 |
| Release | : 2008 |
| Genre | : |
| ISBN | : 9789736257346 |
| Author | : Abdullah Ahmad Alfehaid |
| Publisher | : |
| Total Pages | : 139 |
| Release | : 2021 |
| Genre | : Electronic dissertations |
| ISBN | : |
Control of the speed as well as shaping the speed transient response of a surface-mounted Permanent Magnet Synchronous Motor (PMSM) is achieved using the method of feedback linearization and extended high-gain observer. To recover the performance of feedback linearization, an extended high-gain observer is utilized to estimate both the speed of the motor and the disturbance present in the system. The observer is designed based on a reduced model of the PMSM, which is realized through the application of singular perturbation theory. The motor parameters are assumed uncertain and we only assume knowledge of their nominal values. The external load torque is also assumed to be unknown and time-varying, but bounded. Stability analysis of the output feedback system is given. Experimental results confirm the performance and robustness of the proposed controller. We also compare our proposed control method to the cascaded Proportional Integral (PI) speed controller. Then, we show the extension of this control method to solve the problem of sensorless control of PMSMs. The proposed sensorless control method is a back-emf based control scheme. Therefore, we design a high-gain back-emf observer in the Îł-Îø coordinates. Next, we transform the model of the PMSM to the d-q coordinates, which is performed using the estimated position, and close the loop around the currents with relatively fast PI controllers. After that, we reduce the model of the PMSM and design a third order Q-PLL extended high-gain observer as well as the speed feedback controller. Then, we perform a rigorous stability analysis of the closed loop system. Finally, we show simulation and experimental results to verify performance and robustness of the proposed controller.
| Author | : Chiranjit Sain |
| Publisher | : CRC Press |
| Total Pages | : 179 |
| Release | : 2022-10-25 |
| Genre | : Technology & Engineering |
| ISBN | : 1000484858 |
To reduce the emissions of greenhouse gasses and maintain environmental sustainability, electric vehicles play a vital role in a modern energy-efficient environment. Permanent magnet synchronous motors (PMSMs) are widely employed in electric vehicle technology due to their high dynamic response, better torque-speed characteristics, noiseless operation, high power density, high efficiency and power factor as compared to other conventional motor drives. This book demonstrates the development of various control strategies and illustrates the dynamic performance intensification of a PMSM drive. To ensure the faster dynamic behaviour and flexibility in control under various operating conditions, the performance of a PMSM drive has been explained. Finally, control strategies have been executed through mathematical modelling and illustration of several case studies for optimal operation. Features: Introduces performance indicators in a self-controlled PMSM machine to justify the dynamic behaviour Discusses comparative performance study and optimization of the drive performance Provides a detailed comparative performance analysis between classical and fuzzy logic controllers in a PMSM drive Includes illustrations and case studies using mathematical modelling and real-time test results Discusses the state of the art in solar-powered energy-efficient PMSM drives with various issues This book is aimed at researchers, graduate students and libraries in electrical engineering with specialization in electric vehicles.
| Author | : Zi Qiang Zhu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 501 |
| Release | : 2023-11-14 |
| Genre | : Technology & Engineering |
| ISBN | : 1394194366 |
Sensorless Control of Permanent Magnet Synchronous Machine Drives A comprehensive resource providing basic principles and state-of-the art developments in sensorless control technologies for permanent magnet synchronous machine drives Sensorless Control of Permanent Magnet Synchronous Machine Drives highlights the global research achievements over the last three decades and the sensorless techniques developed by the authors and their colleagues, and covers sensorless control techniques of permanent magnet machines, discussing issues and solutions. Many worked application examples are included to aid in practical understanding of concepts. Written by pioneering authors in the field, Sensorless Control of Permanent Magnet Synchronous Machine Drives covers topics such as: Permanent magnet brushless AC and DC drives Single three-phase, dual three-phase, and open winding machines Modern control theory based sensorless methods, covering model reference adaptive system, sliding mode observer, extended Kalman filter, and model predictive control Flux-linkage and back-EMF based methods for non-salient machines, and active flux-linkage and extended back-EMF methods for salient machines Pulsating and rotating high frequency sinusoidal and square wave signal injection methods with current or voltage response, at different reference frames, and selection of amplitude and frequency for injection signal Sensorless control techniques based on detecting third harmonic or zero-crossings of back-EMF waveforms Parasitic effects in fundamental and high frequency models, impacts on position estimation and compensation schemes, covering cross-coupling magnetic saturation, load effect, machine saliency and multiple saliencies Describing basic principles, examples, challenges, and practical solutions, Sensorless Control of Permanent Magnet Synchronous Machine Drives is a highly comprehensive resource on the subject for professionals working on electrical machines and drives, particularly permanent magnet machines, and researchers working on electric vehicles, wind power generators, household appliances, and industrial automation.
| Author | : Wei Xu |
| Publisher | : CRC Press |
| Total Pages | : 240 |
| Release | : 2023-07-31 |
| Genre | : Technology & Engineering |
| ISBN | : 1000909719 |
Permanent magnet synchronous motors (PMSMs) are popular in the electric vehicle industry due to their high-power density, large torque-to-inertia ratio, and high reliability. This book presents an improved field-oriented control (FOC) strategy for PMSMs that utilizes optimal proportional-integral (PI) parameters to achieve robust stability, faster dynamic response, and higher efficiency in the flux-weakening region. The book covers the combined design of a PI current regulator and varying switching frequency pulse-width modulation (PWM), along with an improved linear model predictive control (MPC) strategy. Researchers and graduate students in electrical engineering, systems and control, and electric vehicles will find this book useful. Features: • Implements evolutionary optimization algorithms to improve PMSM performance. • Provides coverage of PMSM control design in the flux-weakening region. • Proposes a modern method of model predictive control to improve the dynamic performance of interior PMSM. • Studies the dynamic performance of two kinds of PMSMs: surface-mounted and interior permanent magnet types. • Includes several case studies and illustrative examples with MATLAB®. This book is aimed at researchers, graduate students, and libraries in electrical engineering with specialization in systems and control and electric vehicles.
| Author | : Muhammad Ali Masood Cheema |
| Publisher | : Springer Nature |
| Total Pages | : 244 |
| Release | : 2020-02-13 |
| Genre | : Technology & Engineering |
| ISBN | : 3030403254 |
This book explores the direct thrust force control (DTFC) of tubular surface-mount linear permanent magnet synchronous motors (linear PMSMs). It presents a detailed account and analysis of several advanced nonlinear control schemes, based on the direct thrust control principle, to achieve a reduction in steady-state ripple in thrust force with faster transient response, and describes their experimental validation. It also provides rigorous details of the dynamic modelling of linear PMSMs from a control system perspective, and demonstrates the superior control performance of the proposed techniques compared to the current state-of-the-art techniques. Lastly, the book proposes and validates a stator flux observer for sensorless speed estimation comprising a linear state observer and an improved sliding mode component.
| Author | : Song Chi |
| Publisher | : |
| Total Pages | : 165 |
| Release | : 2007 |
| Genre | : Electric machinery, Synchronous |
| ISBN | : |
Abstract: Permanent-magnet-synchronous-machine (PMSM) drives have been increasingly applied in a variety of industrial applications which require fast dynamic response and accurate control over wide speed ranges. Two control techniques are proposed in this dissertation for PMSM drives, namely flux-weakening control incorporating speed regulation and sliding mode observer with feedback of equivalent control. The research objectives are to extend the operating speed range of the PMSM drive system and improve its control robustness and adaptability to variations of operating conditions as well as dynamic performance. First, a robust flux-weakening control scheme is studied. With a novel current control strategy, the demagnetizing stator current required for the flux-weakening operation can be automatically generated based on the inherent cross-coupling effects in PMSM between its direct-axis and quadrature-axis current in the synchronous reference frame. The proposed control scheme is able to achieve both flux-weakening control and speed regulation simultaneously by using only one speed/flux-weakening controller without the knowledge of accurate machine parameters and dc bus voltage of power inverter. Moreover, no saturation of current regulators occurs under any load conditions, resulting in control robustness in the flux-weakening region. Secondly, a sliding mode observer is developed for estimating rotor position of PMSM without saliency in the implementation of position-sensorless vector control. A concept of feedback of equivalent control is applied to extend the operating range of sliding mode observer and improve its angle-estimation performance. Compared to conventional sliding mode observers, the proposed one features the flexibility to design parameters of sliding mode observer operating in a wide speed range. The estimation error of rotor position can be reduced by properly selecting the feedback gain of equivalent control. In addition, a flux-based sliding mode observer with adaptive feedback gain is investigated. The constant magnitude of equivalent control makes it easier to design the switching gain of discontinuous control in the sliding mode observer. As a result, the problematic chattering phenomenon normally prevailing at low speeds due to high switching gains can be mitigated or even eliminated. The feasibility and effectiveness of the control techniques addressed in this dissertation are verified by both computer simulation and experimental results.
| Author | : Gaolin Wang |
| Publisher | : Springer Nature |
| Total Pages | : 305 |
| Release | : 2019-11-15 |
| Genre | : Technology & Engineering |
| ISBN | : 9811500509 |
The book focuses on position sensorless control for PMSM drives, addressing both basic principles and experimental evaluation. It provides an in-depth study on a number of major topics, such as model-based sensorless control, saliency-based sensorless control, position estimation error ripple elimination and acoustic noise reduction. Offering a comprehensive and systematic overview of position sensorless control and practical issues it is particularly suitable for readers interested in the sensorless control techniques for PMSM drives. The book is also a valuable resource for researchers, engineers, and graduate students in fields of ac motor drives and sensorless control.
| Author | : Lizhi Qu |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2019 |
| Genre | : Electric motors, Synchronous |
| ISBN | : 9781392461150 |
Fast dynamic response, precise tracking performance, and strong robustness to disturbance are usually needed for high-performance field-oriented control (FOC) of permanent-magnet synchronous motors (PMSMs). Moreover, electromechanical sensors are commonly used to obtain accurate rotor position information for the FOC of PMSMs. The use of these sensors not only increased the cost but also reduced the reliability of the PMSM drive system. To overcome these drawbacks, the development of rotor position sensorless FOC schemes for PMSMs is desired.In this dissertation, based on the active disturbance rejection control (ADRC) technique, three control schemes, i.e., an adaptive sliding-mode current control (SMCC), an adaptive sliding-mode speed control (SMSC), and a robust rotor position sensorless control were developed for PMSMs. In the adaptive SMCC scheme, an extended state observer (ESO) was designed to estimate in real time the PMSM parameter variations, which were treated as the internal disturbance of the PMSM drive system; the control law of the SMCC was then adapted by compensating the estimated internal disturbance. The adaptive SMSC scheme was designed in a way similar to the adaptive SMCC scheme. The core of the sensorless control scheme is a novel enhanced linear ADRC (ELADRC) algorithm consisting of two linear ESOs (LESOs) and a proportional current controller. One LESO was designed to estimate the back electromotive force, which was treated as the external disturbance. The other LESO was designed to estimate the internal disturbances, i.e., parameter and current regulation quality variations. The estimated total disturbance was used as a feedforward compensation term in the current control loops to improve the current regulation quality of the PMSM drive, which further improved the rotor position estimation performance. The proposed three control schemes were validated by experimental studies on two laboratory PMSM drive testbeds. The experimental results showed that the proposed ADRC-based adaptive SMCC and SMSC schemes had a faster dynamic response, more precise current and speed tracking performance, and stronger robustness to disturbances than the existing control schemes. Moreover, the proposed ELADRC-based sensorless FOC scheme had better dynamic performance and was more robust to PMSM parameter variations than the existing sensorless FOC schemes.
| Author | : Jigneshkumar Desai |
| Publisher | : GRIN Verlag |
| Total Pages | : 61 |
| Release | : 2022-09-27 |
| Genre | : Technology & Engineering |
| ISBN | : 3346731324 |
Document from the year 2022 in the subject Engineering - General, grade: 12, , language: English, abstract: The creation of a simulation model for closed loop vector controlled IPMSM drive performance enhancement and speed control is described in this book. By regulating the torque component of the current, the model achieves superior speed tracking and rapid dynamic response under transient and steady-state circumstances. The control technique is used by both the proportional and integrated controllers in the PI controller. Combining two independent controllers and reducing the shortcomings of each results in a more effective controller. To offer optimal speed operation in the face of environmental changes, load variations, and structural disturbances, the Fuzzy Logic Controller for PMSM must be properly constructed. Using MATLAB Simulink, this book gives a comprehensive simulation of an internal permanent magnet synchronous motor driving system. Interior permanent magnet synchronous motors (IPMSMs) are used to improve machine performance and offer rapid torque response. IPMSMs are utilised in low and medium-power applications such as servos, robotics, variable-speed motors, electric vehicles, and computer peripherals. Because PM motor drives are becoming more popular, simulation systems capable of handling motor drive simulations are in great demand. Simulation tools can dynamically simulate motor drives in a visual environment, saving money and time and easing the development of new systems.
