Traction control for hybrid electric vehicles

Tese de mestrado integrado. Engenharia Elecrtotécnica e de Computadores. Faculdade de Engenharia. Universidade do Porto. 201

Motion control design of a PMSM and FPGA implementation for the Beam Wire Scanner at CERN

This thesis work describes the modelling, simulation, implementation and testing of a motion controller for a Permanent Magnet Synchronous Motor, used as an actuator for the Beam Wire Scanner at CERN. The dissertation, after a brief introduction to the subject, focuses on the design of the control system starting for the basics of motion control and the mathematical equations describing the various parts of the system. The architecture of the controller is explained as well as the design choices and their reasons. It consists in a three-level cascade feedback loop, regulated through three variable structure, saturated PID controllers with anti-windup architecture. Also, three feedforward actions are included, as well as a static decoupler and a steady-state Kalman filter. In the last chapters, the implementation of the control system on an ALTERA FPGA board is described and its performances are verified through a serie of experiments

A matrix converter drive system for an aircraft rudder electro-mechanical actuator

The matrix converter is an attractive topology of power converter for the Aerospace Industry where factors such as the absence of electrolytic capacitors, the potentiality of increasing power density, reducing size and weight and good input power quality are fundamental. The matrix converter potential advantages offers the possibility to achieve the aim of the More Electric Aircraft research which intends to gradually re- place, from the aircraft architecture, the hydraulic power source and its infrastructure with electric power generation and a more flexible power distribution system. The purpose of this work is to investigate the design and implementation of a 40kVA matrix converter for an Electro Mechanical Actuator (EMA) drive system. A SABER simulation analysis of the candidate matrix converter drive systems, for this application, is provided. The design and implementation of the matrix converter is described, with particular attention to the strict requirements of the given aerospace application. Finally, the matrix converter PMSM drive system and the EMA drive system are respectively assembled, tested and commissioned

A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control

—In this paper, a cost-effective and highly accurate resolver-to-digital conversion (RDC) method is presented. The core of the idea is to apply a third-order rational fraction polynomial approximation (TRFPA) for the conversion of sinusoidal signals into the pseudo linear signals, which are extended to the range 0-360° in four quadrants. Then, the polynomial least squares method (PLSM) is used to achieve compensation to acquire the final angles. The presented method shows better performance in terms of accuracy and rapidity compared with the commercial available techniques in simulation results. This paper describes the implementation details of the proposed method and the way to incorporate it in digital signal processor (DSP) based permanent magnet synchronous motor (PMSM) drive system. Experimental tests under different conditions are carried out to verify the effectiveness for the proposed method. The obtained maximum error is about 0.0014° over 0-360° , which can usually be ignored in most industrial applications. Index Terms—Arc tangent function, Analog processing circuits, Pseudo linear signals, Resolver-to-digital conversion (RDC), Third-order rational fraction polynomial approximation (TRFPA)

A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control

In this paper, a cost-effective and highly accurate resolver-to-digital conversion (RDC) method is presented. The core of the idea is to apply a third-order rational fraction polynomial approximation (TRFPA) for the conversion of sinusoidal signals into the pseudo linear signals, which are extended to the range 0-360° in four quadrants. Then, the polynomial least squares method (PLSM) is used to achieve compensation to acquire the final angles. The presented method shows better performance in terms of accuracy and rapidity compared with the commercial available techniques in simulation results. This paper describes the implementation details of the proposed method and the way to incorporate it in digital signal processor (DSP) based permanent magnet synchronous motor (PMSM) drive system. Experimental tests under different conditions are carried out to verify the effectiveness for the proposed method. The obtained maximum error is about 0.0014° over 0-360°, which can usually be ignored in most industrial application

A matrix converter drive system for an aircraft rudder electro-mechanical actuator

The matrix converter is an attractive topology of power converter for the Aerospace Industry where factors such as the absence of electrolytic capacitors, the potentiality of increasing power density, reducing size and weight and good input power quality are fundamental. The matrix converter potential advantages offers the possibility to achieve the aim of the More Electric Aircraft research which intends to gradually re- place, from the aircraft architecture, the hydraulic power source and its infrastructure with electric power generation and a more flexible power distribution system. The purpose of this work is to investigate the design and implementation of a 40kVA matrix converter for an Electro Mechanical Actuator (EMA) drive system. A SABER simulation analysis of the candidate matrix converter drive systems, for this application, is provided. The design and implementation of the matrix converter is described, with particular attention to the strict requirements of the given aerospace application. Finally, the matrix converter PMSM drive system and the EMA drive system are respectively assembled, tested and commissioned

Automatic test-system for resolver measurement used in robots

The Serial Measuring Unit (SMU) is a component used to measure motor angles in robot joints at ABB. Currently, the SMU is under development, and ABB has to manually test the SMU to ensure that changes to the software or hardware do not unintentionally introduce bugs or break previously working features. This testing process is time-consuming and unreliable. This thesis presents the development and implementation of an automatic test system for the SMU in ABB’s existing testing environment. The developed automatic test system is an attempt to utilize open-loop control to test functionalities and the quality of angle measurements. A Resolver Test Unit, primarily consisting of a stepper motor and seven resolvers, was designed for this open-loop test system. Test scripts were developed to control the stepper motor and read data from the SMU. Upon analyzing the results, it became evident that the automatic test system lacks the required accuracy and precision to execute high-precision angle measurement tests reliably. Additional testing revealed a non-linear stepping pattern in the stepper motor and a wrongly tuned stepper motor controller. Furthermore, a slight deviation in the mechanical parts of the Resolver Test Unit is suspected, further affecting the resolver measurements. The test system performed consistently well for tests that did not involve high-precision angle measurements. However, the test system does not qualify for angle and quality measurement tests with the current hardware for open-loop control. Thus, the test system must either be upgraded to higher-quality hardware or changed to a closed-loop system. In addition to one of these requirements, the system needs to be calibrated

Embedded Sensors and Controls to Improve Component Performance and Reliability Conceptual Design Report

The objective of this project is to demonstrate improved reliability and increased performance made possible by deeply embedding instrumentation and controls (I&C) in nuclear power plant (NPP) components and systems. The project is employing a highly instrumented canned rotor, magnetic bearing, fluoride salt pump as its I&C technology demonstration platform. I&C is intimately part of the basic millisecond-by-millisecond functioning of the system; treating I&C as an integral part of the system design is innovative and will allow significant improvement in capabilities and performance. As systems become more complex and greater performance is required, traditional I&C design techniques become inadequate and more advanced I&C needs to be applied. New I&C techniques enable optimal and reliable performance and tolerance of noise and uncertainties in the system rather than merely monitoring quasistable performance. Traditionally, I&C has been incorporated in NPP components after the design is nearly complete; adequate performance was obtained through over-design. By incorporating I&C at the beginning of the design phase, the control system can provide superior performance and reliability and enable designs that are otherwise impossible. This report describes the progress and status of the project and provides a conceptual design overview for the platform to demonstrate the performance and reliability improvements enabled by advanced embedded I&C

Control strategies for Brushless DC motors

Tato diplomová práce se zabývá strategiemi řízení, které jsou dostupné pro bezkartáčové DC motory, a které mohou být použity pro řízení rychlosti pohonů elektrických vozidel. Úkolem práce je studium rozličných řídicích algoritmů, nalezení způsobů, jak optimalizovat jejich výkon, a zároveň simulovat jejich chování pro ověření jejich vlastností. Závěrečná etapa práce spočívá v přípravě implementovatelného řídicího algoritmu, který je poté spuštěn na laboratorním stanovišti s aktivním řídicím systémem založeným na zpětné vazbě PID regulátoru a uživatelského rozhraní (HMI) pro snadnou interakci v průběhu testu.Master's Thesis researching the various control strategies available for BLDC motor control that can then be employed in the speed control of electric vehicle drive systems. The task involved studying the various control algorithms, finding ways to optimize their performance and simulate them as a proof of concept. The final stage of the thesis involved the preparation of an implementable control algorithm that was then run on a test bench with an active PID feedback-based control system and HMI for easy interaction in runtime

ANALYSIS AND SYNTHESIS OF PRECISION RESOLVER SYSTEM

Ph.DDOCTOR OF PHILOSOPH