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Novel Methods of Sensorless Control of Drives with PMSM Motor
Lepka, Jaroslav ; Klíma, Bohumil (referee) ; Lettl,, Jiří (referee) ; Václavek, Pavel (advisor)
Purpose of this dissertation is to explore control techniques of PMSM motors and the design of a complex solution of sensorless control across a wide range of speed and torque. The proposed solution supports industrial implementation of different types of end equipment which use a PMSM motor. The work covers a thorough analysis of position and speed estimation. The Control structure is based on field oriented control technique, processes estimated quantities, and optimizes motor conditions to achieve maximum efficiency, start-up torque, and speed. The work discusses how the solution complies with the latest IEC standards. Compliance with these standards requires adapting the sensorless control technique and field oriented control structure. The elimination of a rotor position sensor and a temperature sensor measuring winding temperature requires development of techniques in software for blocked rotor detection and overload detection. The proposed solutions, which have been granted US patents, are explained in this work and utilize the unique features of an NXP microcontroller optimized for motor control applications. The achieved results are demonstrated on real industrial applications.
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Novel Methods of Sensorless Control of Drives with PMSM Motor
Lepka, Jaroslav ; Klíma, Bohumil (referee) ; Lettl,, Jiří (referee) ; Václavek, Pavel (advisor)
Purpose of this dissertation is to explore control techniques of PMSM motors and the design of a complex solution of sensorless control across a wide range of speed and torque. The proposed solution supports industrial implementation of different types of end equipment which use a PMSM motor. The work covers a thorough analysis of position and speed estimation. The Control structure is based on field oriented control technique, processes estimated quantities, and optimizes motor conditions to achieve maximum efficiency, start-up torque, and speed. The work discusses how the solution complies with the latest IEC standards. Compliance with these standards requires adapting the sensorless control technique and field oriented control structure. The elimination of a rotor position sensor and a temperature sensor measuring winding temperature requires development of techniques in software for blocked rotor detection and overload detection. The proposed solutions, which have been granted US patents, are explained in this work and utilize the unique features of an NXP microcontroller optimized for motor control applications. The achieved results are demonstrated on real industrial applications.
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Estimation in the planning of IS/ICT projects and metrics for the monitoring of projects from the point of view of ISO/IEC norms.
Ognev, Anton ; Chlapek, Dušan (advisor) ; Šťastný, Petr (referee)
This thesis deals with issues surrounding the management of IS/ICT projects, primarily from the point of view of ČSN ISO/IEC norms. I will list and analyse those norms used to define important indicators and processes, which are subsequently mapped to PMBOK process groups. Every norm is accompanied by a brief evaluation describing its suitability for use in IS/ICT projects, its anticipated benefits and the approach taken in its application. The next part of the thesis consists of an analysis of norms from the point of view of methods of estimation in the planning of IS/ICT projects. An analysis is made of the majority of norms that directly or tangentially affect estimation in the planning of IS/ICT projects. The practical section of the thesis contains a metric for the monitoring of projects from the point of view of ISO/IEC norms and the dissemination of the "MMaHPISICTv5.7" model, as created by Ondřej Kmoníček in the thesis "Sledování a vyhodnocování IT projektů - Monitoring and Evaluation of IT Projects" [38]. The model is supplemented by ISO/IEC metrics and also other functionalities, focussing primarily on the depiction of individual metrics over a period of time.
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