INTRODUCTION AND SCOPE
POWER LEVEL BATTERY VOLTAGE
3 phase 50Hz PMSM 115V±20% phase voltage 15kW 320 400VDC (nominal value 350VDC) Motor (KTH development) IGBT Rectifier Battery dSpace system Hardware (in development) Piece of software to develop for implementation (probably C) Sensors (full access I/V/Speed)
Table 1.1 : Scope data
At the beginning of thesis, a first plan had been established.
Literature review (how the system work/find literature resources)
Topology selection (VFOC is preferred method regarding to this specific application)
System design (inductance value, switching frequency, control design)
Simulation with Matlab/Simulink
Addition of PMSM to the model and using the leakage inductance of the machine as energy storage device (Re design/Re simulation)
Hardware test (in development)
Testing and debugging / Report
Nevertheless, after a couple of weeks we decided to simplify the system to keep a grid connected rectifier and try to implement it in the laboratory to test the controller.
The main goal of the thesis is to develop and test the control algorithm of the converter.
We will start this thesis with an overview of three‐phase controlled rectifiers (chapter 2), with steady state operation, modeling, limitations. Then, the overview will focus on control strategies, and finally, a Pulse Width Modulation (PWM) will be describe. Chapter 3 will be the main part of the report with Voltage Oriented Control design and simulation. We will see the current and voltage controller, stability analysis, Phase Locked Loop (PLL), and finally a simulation of grid connected converter. The last part chapter 4 will give the main guidelines for implementation of the controller using dSpace system.