doc. Ing. Miroslav Chomát, CSc.

The thesis will be focused on Hardware-in-the-Loop (HIL) testing of control units for power electronic inverters. It will deal with the development of the numerical model of permanent-magnet-synchronous-motor drive and its implementation on FPGA card, which enables real-time evaluation. The model will be able to accurately simulate the behavior of a real motor and will take into account some non-linear and parasitic effects, such as the saturation in the magnetic circuit. The synchronous-machine parameters will be obtained from the simulations using finite element method and from the measurements on a real motor.

The faults, which can arise in the rotor cage of induction motor, can have significant effects on the properties of such machines. They may cause torque pulsations and a rise of higher time harmonics in electric currents and may negatively affect the overall energy efficiency of electric machines. The objective will be an analysis of the effects, which various types of faults have on the properties of induction machines, by means of FEM modeling of the magnetic field distribution in the machine.

The objective of this work is to propose and develop an experimental high-speed electric-drive system, which can be used for energy storage based on a magnetically levitated flywheel. Because of the application’s specifics, great attention needs to be paid to the energy efficiency and to minimizing the losses particularly in the rotor, which will be placed in vacuum. To stabilize the flywheel with the rotor, the magnetic field produced by the drive system will be utilized, which needs to be respected in the design. Alternatively, drive, stability, and levitation functions may be integrated in one system.

The proposed topic deals with new progressive AC motor drive control methods such as sensorless speed control, direct torque control, sliding mode control etc. Different possible types of given control methods should be analysed and compared. The proper control algorithm should be designed, implemented by means of microprocessor technique, and its function performing verified. http://motor.feld.cvut.cz/?q=cs/chomat

The thermal and mechanical properties of additive-manufacturing materials for electrical machines and anisotropic magnetic structures for application in electrical machines will be investigated. The AM methods for post-processing of electrical machines will be developed and tested. The research topic will be done in the framework of HORIZON MSCA project “New Generation of Electrical Machines Enabled by Additive Manufacturing.”