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Pavel Záskalický - IEEE Xplore Author Profile

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The paper deals with a mathematical model of a five-phase asynchronous motor with an squirrel-cage rotor and the stator winding is a star connected. The motor is supplied by five-phase harmonic voltage with the possibility of control the supply frequency and voltage. From the stator voltage equations, relations valid for the coordinate system \alpha, \beta are derived. Based on the known paramet...Show More
This paper deals with the V/f control of a five-phase induction machine. Carrier-based sinusoidal PWM modulation for five phases is presented together with an open-loop and closedloop control structure. The implementation of the algorithm is provided with the automated code generation and pure Simulink-based solution is shown in the paper. Experimental results, realized on Texas Instruments F28335...Show More
The presented paper deals with the five-phase induction motor (IM) having pentagon connected stator winding, which is working under one phase supply failure. Computation of the motor electromagnetic quantities are made using the space vector theory in the complex plane. Analysis is done assuming, the motor is supplied by a pulse width modulation (PWM) controlled inverter with sufficiently high mod...Show More
The presented paper deals with the five-phase induction motor (IM) having pentacle connected stator winding, which is working under one phase supply failure. Computation of the motor electromagnetic quantities are made using the space vector theory in the complex plane. Analysis is done assuming, the motor is supplied by a pulse width modulation (PWM) controlled inverter with sufficiently high mod...Show More
The presented article deals with steady-state analysis of five-phase Induction Motor (IM) pentagon connected, which is supplied by rectangular voltage from five-legs Voltage Source Inverter (VSI). Complex Fourier-series was used to express inverter terminal voltages. Based on mathematically described inverter output voltages, a formula for VSI output space phasor was derived. Assuming sinusoidal m...Show More
The contribution deals with mathematical model of a five-phase induction motor (IM), whose winding is pentacle connected. The motor is supplied by a five-legs voltage source inverter (VSI) with PWM output voltage control. Inverter output voltages are expressed in the form of complex Fourier series. From inverter leg voltages, the voltage space phasor formula is developed, which is applied to IM eq...Show More
The presented article deals with a steady state analysis of a five-phase induction motor (IM) supplied by a five-legs voltage source inverter (VSI) with rectangular voltages. A complex Fourier-series is used to express the inverter output voltages, on the basis of which the relationship for the inverter output space phasor was derived. Assuming sinusoidal motor winding distribution, on the base of...Show More
The contribution deals with steady state estimation of an electromagnetic torque ripples and a current waveform of a two-phase induction motor (IM) supplied by an three-leg IGBT bridge connected voltage source inverter (VSI). The inverter's output voltage is controlled by a modified sinusoidal SPWM of the input DC voltage. The complex Fourier series analysis of the inverter's output voltage was ma...Show More
The presented paper deals with the calculation of the electromagnetic torque ripple waveform of an induction machine (IM) in steady state. The motor is supplied by non-harmonic voltages from semiconductor inverter. Mathematical model of the inverter is built on the base of complex Fourier series. Based on the mathematical formulas across the terminal inverter voltages a voltage spatial phasor is d...Show More
The presented article propose a steady state analysis and a mathematical model of a five-phase voltage source inverter with PWM output voltage control. The mathematical model is built on condition of assumption of idealized semiconductor devices. A complex Fourier series approach is used to predict the waveforms of the terminal output inverter voltages. On the basis of the developed voltage formul...Show More
The paper deals with steady state analysis of electromagnetic torque ripples of a three-phase induction machine, which is supplied by an IGBT transistors bridge connected inverter. The inverters output voltage is controlled by PWM from the input DC voltage. The complex Fourier series analysis of the inverter output voltage was made, in order a spectrum of the harmonic supply voltages. The differen...Show More
The contribution deals with steady state estimation of a electromagnetic torque ripples and a current waveform of a two-phase induction motor, which is supplied by an three-leg IGBT bridge connected inverter. The inverter's output voltage is controlled by a modified sinusoidal SPWM of the input DC voltage. The complex Fourier series analysis of the inverter's output voltage was made, to obtain a s...Show More
The paper deals with space-vector pulse width modulation (SVPWM) technique for the vector controlled two-phase induction machine (TPIM). It is supposed that the machine is supplied either by the VSI three-leg inverter or by matrix half-bridge converter. The later mentioned provides less power losses of the converter due to soft switching (in spite of more number of switches). A reference voltage v...Show More
The paper deals with space vector pulse width modulation (SVPWM) technique for vector controlled of two-phase disk synchronous machine (TPDSM). It is supposed that machine is supplied by VSI three-leg inverter. A reference voltage vector located in the irregular hexagon is realized by adjusting six space vectors and two zero vectors. The switching sequence for the digital SVPWM technique and the s...Show More
Stepper motors are becoming to be very attractive transducers for conversion of an electric signal to a mechanical position. Due to its simple construction the reluctance machine is considered as a very reliable machine which practically not require any maintenance. The present paper proposes a mathematical analytical method of a calculus of a phase current and electromagnetic torque of the motor ...Show More
In present article a dynamic model of universal motors, based on the design data is developed. Suppose the supply voltage is harmonic, but variable. After representing of the mathematical model a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage o...Show More
Reluctance step motors are obviously adapted to such functions, but the number of steps depends on the product of the numbers of phases and of rotor teeth. In usual structures (those with regularly displayed stator salient poles, slotted or not) these numbers must obey certain relations, so that many numbers of steps are impossible to obtain, including, obviously, all the odd numbers. This article...Show More
Based on classical machines with regularly displayed stator poles, the authors present methods for designing motors with a dissymmetrical stator, which make it possible to increase considerably the range of the possible numbers, S, of steps by turn. In theory, all the values of S can be obtained except prime numbers. In practice, it is difficult to obtain numbers of the form 2q, where q is a large...Show More