Petr Simonik

Control algorithms of propulsion unit with induction motors for electric vehicle

The article deals with the research of algorithms for controlling electronic differential and differential lock of an electrically driven vehicle. The simulation part addresses the deve ...

AC drive with permanent magnet synchronous motor and sensorless control

In the paper there are presented results of the sensorless control of AC drive with the permanent magnet synchronous motor. The method is based on the rotor magnetic flux components estimation. Practical realization was made by the microcomputer control system with the digital signal processor TMS320F2812. The graphical visualization of the electrical controlled drive was made by the software Lab View. The measured results of proposed laboratory stand with applied vector control and sensorless vector control were shown at the conclusion.

Properties of selected direct torque control methods of induction motor

Direct torque control is one of modern methods of A.C. machines control. The direct torque control methods have been developed and experimentally tested at the Department of Electronics too. In the paper, important quantities are described which were measured on a real induction motor drive with different direct torque control methods. The basic properties of the methods are compared with the Takahashi method.

Signal processing for vector control of AC drive

An induction motor with vector control has a very good dynamic behavior and as a consequence is well suited for high performance applications. But, the vector control is very sensitive to variations in the rotor time constant. In the paper there is presented signal processing for the vector control of an induction motor with rotor time constant adaptation using TMS320F2812 DSP. The method employs the model reference adaptive system. The estimated rotor time constant is necessary for so-called current model which is used in the vector control and serves for the determination of the quantities for the transformation from stationary reference frame into reference frame. At the end of the paper some experimental results are provided to demonstrate the effectiveness of realized signal processing.

Electronic Differentials with Active Torque Distribution for IWD Vehicles

This paper concerns proposal the simulation model of Individual-Wheel Drive (IWD) with electronic differentials. The MATLAB/Simulink environment is used for simulation model of the electronic differential and electronic centre differential for real IWD vehicle called “Democar”. One of the components that affect the resulting behaviour of the vehicle is a mechanical differential. The work is the first part based on the description of the behaviour of vehicles in terms of driving performance. Based on the analysis of the requirements on stability of the vehicle was developed his mathematical description. From the mathematical description, there is also a general simulation model vehicles with separate all-wheel drive. This model allows to simulate a variety of driving situations and compare the influence of torque control on individual wheels resulting behaviour of the vehicle. The results of the simulations it is possible to create an optimal control algorithm high-level control system to separate all-wheel drive IWD. The work is focused on the management of electronic differential and electronic centre differential with active torque distribution.

Structure of electronic systems of remotely navigated vehicle

This article describes concept and design of electronic units of remotely navigated vehicle Democar. Article is mainly focused on hardware part of this vehicle. Desribed are systems of this vehicle and their main functions. Also is included cooperation between systems with procedures for safety operation. In last part are shown results of communication between systems and functional results.

Modelling and simulation of IWD vehicle

In this paper, the basic simulation model of Individual-Wheel Drive (IWD) vehicle is demonstrated. The MATLAB/Simulink environment is used for simulation model of the real IWD vehicle called “Democar”. The overall simulation model contains a few sub-models that represent the main structures of the vehicle. The mechanical parameters of the vehicle, ambient air, and terrain are aspects which affect the vehicle dynamics and are considered in sub-model. Each of the four wheels has its own electric driveline. For the torque management of individual drivelines and their coordination is designed control sub-system. Each of these main structures and their interlinkages are covered in the paper. A stable MATLAB/Simulink model was developed and validated, important results of simulation are presented. All results that are mentioned in the paper are made within the researcher activity in the branch of automotive electronics in the Department of Electronics, VSB-Technical University of Ostrava.

Options to Mitigate Congestion on Roads

The article deals with the problem of emergence of congestions caused by wrong intersection design, especially roundabouts. There is analyzed the problem of bad design of roundabout according to the known standards. The real design is compared with theoretical demands and with the real operation resulting from in situ survey. There is described the behavior of the drivers and parameters affecting driving path through roundabout.

Signal Processing for Active Power Filters

The paper describes special active power filter solution. There are given control algorithms and methods for the filter current regulation. Firstly, there is described power part structure of the filter with the resonant converter and general conception structure of the filter. Then there is description and calculations of the control algorithms and methods for the filter currents regulation. In the paper are given results of practical realization, which was, in this case, mainly orientated to control algorithm research. For this purpose was selected DSP TMS320F2812 and implemented to the control unit of the filter. Control unit was practically realized by use of development DSP kit. Sample of practically realized control unit was designed as universal control unit for power electronics applications. Reached results that are presented in the paper are simulation and practical realization results.

Realization of control algorithms for active power filter by means of DSP TMS320F2812

The paper describes the active power filter structure, control algorithms and methods for filter current regulation. Firstly, there is described the structure of parallel active filter power part, their resonant DC — link and structure of active filter general conception. Then there is described the control algorithms and methods for filter current regulation. The paper is mainly orientated to control algorithm realization, used for DSP TMS320F2812 implementation. Used control unit was designed by use of development DSP kit. Reached results that are presented in the paper are simulation and practical realization results.