Nonlinear control of electronic converters: Fast and optimal control using sampling-driven nonlinear MPC

This thesis considers the design of the sampling-driven nonlinear model predictive controller (SD-NMPC) for power electronic converters. Most MPC schemes that are used nowadays lack in the application for systems with high sampling frequencies because of their high computational time, especially when the system is nonlinear. This is, for example...

Position Sensorless Drive and Online Parameter Estimation for Surface-Mounted PMSMs Based on Adaptive Full-State Feedback Control

In this article, a position sensorless drive and online parameter estimation method for surface-mounted permanent magnet synchronous machines-based on adaptive full-state feedback current control is proposed. The position sensorless drive is established by the detection of the back-electromotive force in the gamma delta synchronous reference...

Fault Tolerant Control and Reliability Assessment of Modular PMSM Drive Systems

This report proposes an approach to implement improved Fault Tolerant (FT) control in a modular Open Winding (OW) Permanent Magnet Synchronous Machine (PMSM) drive system. The report also proposes a reliability assessment on FT converter topologies and the effect of layering redundancy. An existing lab setup is used as a case study to create a...

Online-parameter-estimation of a PMSM in an EV-powertrain: including thermal measurements

This paper proposes an online motor-parameter-estimator for a PMSM in an EV-powertrain. The proposed method differs from the conventional approach by using thermal measurements to decouple the resistance estimation from the rest of the estimation. Conventional approaches use the voltage and current measurements to estimate all parameters at once...

Permanent Magnet Motor Simulation: For the Nuon Solar Team

This thesis is about the simulation of the permanent magnet motors of the Nuna Solar Car in order to find their fundamental motor parameters. These parameters can then be used in a Field-Oriented control algorithm to be used in a new motorcontroller for the team. A finite element analysis is done on the two current motors of the Nuna solar car,...

Optimization of a submarine propulsion system by implementing a PEM fuel cell and a PMSM in a first principle model

A naval submarine has to cope with different operational modes: sailing at<br/>the surface, just below the surface or fully submerged and at different speeds.<br/>Therefore it needs an appropriate power plant. In this research a first principle<br/>submarine propulsion model has been extended with a Proton Exchange Membrane<br/>Fuel Cell (PEMFC)...

Analysis of Electromagnetic Behavior of Permanent Magnetized Electrical Machines in Fault Modes

Over the years, the use of PM machines has been increasing in the offshore wind industry and marine industry. The industries thrive on efficient function of the PM machines. These machines are prone to electro-mechanical faults due to environmental conditions and maintenance. Out of all these faults, stator internal faults are concerning as they...

Heat transfer enhancement of a permanent magnet synchronous machine used in vehicle traction

One of the major restrictions that hinder the versatility of electrical machines in any sector is their thermal limitations. This thesis deals with the study of the heat transfer occurring in an outer rotor permanent magnet synchronous machine used in the electric vehicle industry with the aim of exploring possibilities to reduce the hotspot...

Sensorless control of Permanent Magnet Synchronous Motor at low speed

Motor drives are essential in many industry applications such automotive, robotics, power and energy industry. The availability of cheap and powerful digital signal controller have increased the interest in its application in motor control. Sensorless control of motor is especially challenging because the rotor position and speed information...

Modelling and optimization of a permanent-magnet machine in a flywheel

This thesis describes the derivation of an analytical model for the design and optimization of a permanent-magnet machine for use in an energy storage flywheel. A prototype of this flywheel is to be used as the peak-power unit in a hybrid electric city bus. The thesis starts by showing the feasibility of using a flywheel energy storage system...