Search results for: Piotr Bogusz
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Bulletin of the Polish Academy of Sciences. Technical Sciences > 2021 > Vol. 69, nr 3 > art. no. e137058
This article considers the problem of the rise in temperature of the windings of an induction motor during start-up. Excessive growth of thermal stresses in the structure of a cage winding increases the probability of damage to the winding of the rotor. For the purpose of analysis of the problem, simplified mathematical relationships are given, enabling the comparison of quantities of energy released...
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Napędy i Sterowanie > 2019 > R. 21, nr 3 > 114--118
W niniejszej pracy przedstawiono wyniki badań laboratoryjnych napędu z prototypową maszyną reluktancyjną przełączalną o konfiguracji 8/6, przeznaczoną do napędu lekkiego pojazdu elektrycznego. Badania zrealizowano na specjalnie zaprojektowanym i wykonanym stanowisku badawczym. W ramach prac badawczych dla pracy silnikowej i podstawowych metod sterowania maszyny SRM wyznaczono charakterystyki mechaniczne...
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In the paper, results of simulation and laboratory tests of a multi-pole brushless motor with permanents magnets which stator magnetic circuit was made from an anisotropic sheet with thickness of 0.23 mm were presented. The torque static characteristics were determined based on numerical calculations and they were compared with results from laboratory tests. Waveforms of currents, voltages and electromagnetic...
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In the paper, three-phase motor with permanent magnets which consists of two independently supplied windings on stator called by the authors DCBLDC (Dual-Channel Brushless Direct Current) was discussed. The stator windings are supplied by two independent power converters. During normal operation, the machine operates in dual-channel operation mode whereas after fault of one channel, further operation...
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The paper discusses the concept of brushless DC motor with permanent magnets for a high-reliability drive. The possibility of improvement of vehicle drive reliability was shown on the example of a motor designated to drive of a small electric vehicle. The drive reliability can be improved by using two independent power converters which supply a motor with distributed windings in a double star connection...
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The paper presents results of analysis of switched reluctance motor structures for a high-speed drive. Two structures of motors i.e. 6/4 and 6/2, were compared. In the 6/2 structure, air-step gap was introduced. Static characteristics were determined for both structures based on field calculations. Waveforms of currents, voltages and electromagnetic torque in specific operating point were determined...
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A hybrid drive of an unmanned aerial vehicle uses two mechanically coupled drives. In one of the drives, an electrical machine is used. Its role is not only limited to a motoring operation, e.g. during achieving the flight ceiling. The electric machine changes its operation into generating after reaching the flight ceiling, this allows not only meeting current electrical energy demands but also battery...
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In this paper, the series configuration of pole winding connections in each phase of a three-phase 12/8 switched reluctance motor was analyzed. Based on the simulation model, the effect of magnetic couplings on motor properties was determined. Static characteristics were obtained for NNSS and NSNS configurations. Voltage, current, and electromagnetic torque waveforms were determined. Simulation results...
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Two-phase switched reluctance motors are distinguished by their very simple design and belong to the group of high-speed motors. At high rotational speeds, losses in the core of a 4/2-pole switched reluctance machine are much lower than those occurring in a SRM with a larger number of phases. Unfortunately, a flaw of such a solution consists of a difficulty to obtain the starting torque in certain...
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This paper presents a proposal of a new control method of the switched reluctance motor (SRM) in the low-speed range. The proposed method limits the maximum value of SRM drive supply current. Application of the method results also in improvement of the drive efficiency compared to the classical current control method, so it can be applied to control switched reluctance motors designed to electric...
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This paper presents results of a study concerning operating modes of brushless DC machine (BLDCM) used in the hybrid drive designed for unmanned aerial vehicle (UAV). A mathematical model of the machine and a simulation model of the whole drive system are proposed. Structure of the parallel hybrid drive system is discussed. Results of simulations are presented for three different operation modes provided...
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The paper presents an analysis of a brushless dc motor (BLDC) design solution to be used in the hybrid drive for an unmanned aerial vehicle (UAV), where the designed machine can be operated as the combustion engine starter, generator, and motor. Solutions with external rotor are preferred due to necessity of minimization of the machine weight. Relatively low value of the supply voltage requires that...
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The paper presents results of simulations and laboratory tests of a switched reluctance motor (SRM) designated to a high-speed drive. As the solution, a two-phase 4/2 motor has been proposed with asymmetric magnetic circuit of the rotor. The asymmetry was introduced intentionally in order to obtain the possibility to start the motor from any rotor position. Starting the motor from various initial...
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The paper presents analysis of a 4/2 switched reluctance motor design solution with reduced stator pole-arc. The analyzed model is designed to be used in a high-speed (45,000 rpm) drive. The stator pole-arc value change was accompanied by asymmetric structure of rotor magnetic circuit to allow start the motor from any rotor position. Static characteristics of the designed motor have been determined...
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The article discusses the issue of the impact of parameter control on the characteristics of switched reluctance motor. The four-phase motor 8/6 under analysis is intended for small electric car drives. In the case of electric car drive the work with extended constant power range is significant. The standard control enables the sustenance of the constant power range to the constant moment range rate...
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This article presents selected results of 6/4 switched reluctance motor analysis with an asymmetric magnetic circuit of stator. The designed motor is dedicated for multifunction drive of a food processor. In the designed motor one of the phases has modified magnetic and electric parameters. The influence of stator magnetic circuit asymmetry is presented on the example of static characteristics (electromagnetic...
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A study of the design process of BLDC motor designated as a power source for an Unmanned Aerial Vehicle (UAV). It was assumed that the UAV would be powered by a hybrid system, where electric power source operates in parallel to a combustion engine. Geometry of the electric motor being designed is presented as well as how the shape and magnetizing method influence cogging torque and average torque...
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Construction of the Switched Reluctance Motor (SRM) developed by the authors and designated as a driving system for the food processor, is presented in this paper. The 6/4 design motor is of asymmetric stator construction. Results of simulation calculations are presented in a form of static characteristics, as well as current and torque waveforms. An analysis of how the air gap thickness, the width...
