Vladimir Vavrus

Static and dynamic fault analysis of Switched Reluctance Motor

This paper deals with static and dynamic analysis of the Switched Reluctance Motor (SRM) under fault operating conditions. The static analysis is carried out by means of Finite Element Method (FEM) to investigate static parameters of the SRM for health and some defined faults of the phases. These static parameters are used in the dynamic model of the SRM and some transients are simulated for normal condition and also for fault operation. The comparison with experimental results is presented.

Design of control system for forced dynamics control of an electric drive employing linear permanent magnet synchronous motor

The paper presents forced dynamics control of an electric drive with linear permanent magnet synchronous motor. This control method offers an accurate realisation of a dynamic speed response, which can be selected for given application by the user. In addition to this, the angle between stator current vector and moving part flux vector are maintained mutually perpendicular as it is in conventional vector control. To achieve prescribed speed response derived control law requires an external force information, which is obtained from the set of observers. The first set of observers is based on sliding-mode, while the second observer is classical full-state observer and exploits information of the position sensor. Simulations of the overall control system together with preliminary experimental results for the drive with rotational synchronous motor predict intended performance of the drive

A power loss calculation method of IGBT SRM converter

This paper deals with the analysis of losses, calculations for switched reluctance motor (SRM) power, converter. Switching and conduction losses are calculated by, analytical methods and they are compared with simulations results, for several values of motor speeds and torques. Losses are, calculated for one phase in steady state during its conduction, interval. Converter consists of real power modules of with, trench/fieldstop IGBT3 and Emitter Controlled3 diode in half, bridge configuration. Switched reluctance motor with power, converter will be used as main traction drive in small intra-urban, electric vehicle.

Forced dynamics position control of the drive with linear PMSM

Design and verification of forced dynamics position control of a drive with a linear permanent magnet synchronous motor is presented. This control method is a relatively new one and using the principles of feedback linearisation offers an accurate realisation of a dynamic speed and position response, which can be selected for a given application by the user. In addition to this, the primary part current vector and the moving part flux vector are maintained mutually perpendicular as in conventional vector control. The control system has the cascade structure with an outer position control loop and an inner speed control loop. To achieve the defined speed response, the derived control law requires estimation of an external force, which is obtained from an observer. The overall control system is verified by simulations and experimentally. Preliminary experimental results confirmed that the moving part position response follows the prescribed one fairly closely.

Prescribed closed-loop speed dynamics control of the actuator employing linear permanent magnet synchronous motor

A new control method for the drives employing linear permanent magnet synchronous motor with prescribed closed-loop dynamics is presented. This control method offers an accurate realisation of dynamic speed response profile, which can be selected for given application by the user. In addition to this, the angle between stator current and rotor magnetic flux vectors can be maintained mutually perpendicular as it is in conventional vector control. The developed control system operates with position sensor. To achieve prescribed speed response derived control law requires external force information, which is obtained from the observers. Simulations of the design control system, including preliminary experimental results for the drive with rotational synchronous motor predict the intended drive performance.

Design and parameter analysis of short-flux path switched reluctance motor in electrical vehicles

This paper deals with a new concept of a three phase 12/8 Switched Reluctance Motor (SRM) with short flux-path. The concept, construction and design procedure of this SRM is performed. The static and dynamic parameters and behavior of the motor will be investigated for various operating conditions in accordance with electrical vehicle (EV) requirements. The thermal analysis for rated state is carried out. Some recommendations for electric traction drives using this motor are given.

Sensorless control of variable speed drives using switched reluctance machine

The paper deals with various sensorless techniques for SRM. The theory of most these techniques is described and their advantages and disadvantages are discussed. Simulation of a SRM traction drive for an electric vehicle was created and experimentally verified. A selected method is simulated on the base of a real SRM for various operating range and conditions. The method is analyzed from the point of view of several criterions for the SRM traction drive application.

Three phase AC cable over-voltages analysis for ultra-deep wells supplying

This paper deals with the analysis of over-voltages and currents stresses of energy transfer for ultra-deep wells during steady states and transients. This energy transfer can be realized by three phase AC transmission via power cable. The simulation analysis is described.