Sliding mode control with observer for permanent magnet synchronous machine drives

This paper aims to develop the sliding mode control (SMC) scheme in sensorless permanent magnet synchronous machine (PMSM) drives to replace conventional proportional integral (PI) speed control. The SMC is formulated based on the integral sliding surface of the speed error. And the error is corrected based on the concept of Lyapunov stability. The SMC is designed with the load torque observer so that the disturbance can be estimated as feedback to the controller. The vector control technique which is also known as field-oriented control (FOC) is also used to split the stator current into the magnetic field generating part which is the direct axis and the torque generating part which is the quadrature axis. This can be done by using Park and Clarke transformations. The performance of the proposed SMC is tested under changes in load-torque and without load for different speed commands. The results prove that the SMC produces robust performances under variations of speeds and load disturbances. The effectiveness of the proposed method is verified and simulated by using MATLAB/SIMULINK software

Research and Implement of PMSM Regenerative Braking Control for Electric Vehicle

As the society pays more and more attention to the environment pollution and energy crisis, the electric vehicle (EV) development also entered in a new era. With the development of motor speed control technology and the improvement of motor performance, although the dynamic performance and economical cost of EVs are both better than the internal-combustion engine vehicle (ICEV), the driving range limit and charging station distribution are two major problems which limit the popularization of EVs. In order to extend driving range for EVs, regenerative braking (RB) emerges which is able to recover energy during the braking process to improve the energy efficiency. This thesis aims to investigate the RB based pure electric braking system and its implementation. There are many forms of RB system such as fully electrified braking system and blended braking system (BBS) which is equipped both electric RB system and hydraulic braking (HB) system. In this thesis the main research objective is the RB based fully electrified braking system, however, RB system cannot satisfy all braking situation only by itself. Because the regenerating electromagnetic torque may be too small to meet the braking intention of the driver when the vehicle speed is very low and the regenerating electromagnetic torque may be not enough to stop the vehicle as soon as possible in the case of emergency braking. So, in order to ensure braking safety and braking performance, braking torque should be provided with different forms regarding different braking situation and different braking intention. In this thesis, braking torque is classified into three types. First one is normal reverse current braking when the vehicle speed is too low to have enough RB torque. Second one is RB torque which could recover kinetic energy by regenerating electricity and collecting electric energy into battery packs. The last braking situation is emergency where the braking torque is provided by motor plugging braking based on the optimal slip ratio braking control strategy. Considering two indicators of the RB system which are regenerative efficiency and braking safety, a trade-off point should be found and the corresponding control strategy should be designed. In this thesis, the maximum regenerative efficiency is obtained by a braking torque distribution strategy between front wheel and rear wheel based on a maximum available RB torque estimation method and ECE-R13 regulation. And the emergency braking performance is ensured by a novel fractional-order integral sliding mode control (FOISMC) and numerical simulations show that the control performance is better than the conventional sliding mode controller

Sistema modular didáctico para prácticas de Control de servomotores AC

Desarrollar un módulo didáctico para la ejecución de prácticas de laboratorio en la bancada de pruebas de servomotores AC del laboratorio de la Carrera de Ingeniería en Mecatrónica de la Universidad Técnica del Norte.En el presente trabajo de titulación desarrolla un sistema modular didáctico para prácticas de laboratorio de control de posición y velocidad de servomotores AC. En el cual se propone una arquitectura basada en un sistema de control HMI-PLC, para gestionar los servosistemas GSK DA98D y consecuentemente los motores síncronos 110 SJT. Dentro de un contexto postpandemia, se diseña con un enfoque de “Laboratorio remoto”, por esto, se incluye en la arquitectura un sistema de transmisión de video en vivo multiplataformas desarrollado con el software OBS. La configuración del HMI virtual permite la ejecución de ejercicios específicos estructurados para el sistema modular didáctico. Además, dota de versatilidad a las experimentaciones al permitir el uso de diferentes escalas y sistemas de referencia y facilita la interacción del estudiante con el sistema de control al brindar un seguimiento del proceso a través de gráficas y simulaciones. El sistema mecánico diseñado cuenta con piezas y partes desmontables e intercambiables que proveen de la característica de modularidad al sistema didáctico, con ello se han logrado ejecutar funciones básicas con los servomotores como el posicionamiento angular y lineal de manera precisa. Las prácticas de laboratorio estructuradas y ejecutadas en el sistema modular didáctico han permitido a estudiantes el aprendizaje de conexiones eléctricas, programación, seguimiento de procesos a través de un HMI y aplicaciones industriales básicas de servomotores AC.Ingenierí

Advances in Theoretical and Computational Energy Optimization Processes

The paradigm in the design of all human activity that requires energy for its development must change from the past. We must change the processes of product manufacturing and functional services. This is necessary in order to mitigate the ecological footprint of man on the Earth, which cannot be considered as a resource with infinite capacities. To do this, every single process must be analyzed and modified, with the aim of decarbonising each production sector. This collection of articles has been assembled to provide ideas and new broad-spectrum contributions for these purposes