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Dr. Vadim Kazakbaev
Ural Federal University

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0 Electric Drives
0 Electric Machines
0 Electric Motors
0 Synchronous Reluctance Motors
0 electical engineering

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Journal article
Published: 29 June 2021 in Water
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The paper discusses the use of the combined control for a system of two parallel pumps to increase its service life. Using the combined control, the pumping system is controlled together by change the speed, throttling, and bypass. The power consumption of the pumping system is calculated for three methods of flow control: with minimum energy consumption, with maximum reliability, and control with a trade-off between efficiency and reliability. In the case of control with maximum reliability, the energy consumption of the pumping system is higher than in the case of control with minimum energy consumption by 29.2%. In the case of the proposed trade-off control, which provides acceptable reliability, the power consumption is higher than with the minimum energy consumption control by only 7.3%.

ACS Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii. Increasing Service Life and System Efficiency of Parallel Pumps Using Combined Pump Regulation. Water 2021, 13, 1808 .

AMA Style

Safarbek Oshurbekov, Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii. Increasing Service Life and System Efficiency of Parallel Pumps Using Combined Pump Regulation. Water. 2021; 13 (13):1808.

Chicago/Turabian Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii. 2021. "Increasing Service Life and System Efficiency of Parallel Pumps Using Combined Pump Regulation." Water 13, no. 13: 1808.

Journal article
Published: 11 June 2021 in Mathematics
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Synchronous homopolar motors (SHMs) have been attracting the attention of researchers for many decades. They are used in a variety of equipment such as aircraft and train generators, welding inverters, and as traction motors. Various mathematical models of SHMs have been proposed to deal with their complicated magnetic circuit. However, mathematical techniques for optimizing SHMs have not yet been proposed. This paper discusses various aspects of the optimal design of traction SHMs, applying the one-criterion unconstrained Nelder–Mead method. The considered motor is intended for use in a mining dump truck with a carrying capacity of 90 tons. The objective function for the SHM optimization was designed to reduce/improve the following main characteristics: total motor power loss, maximum winding current, and torque ripple. One of the difficulties in optimizing SHMs is the three-dimensional structure of their magnetic core, which usually requires the use of a three-dimensional finite element model. However, in this study, an original two-dimensional finite element model of a SHM was used; it allowed the drastic reduction in the computational burden, enabling objective optimization. As a result of optimization, the total losses in the motor decreased by up to 1.16 times and the torque ripple decreased by up to 1.34 times; the maximum armature winding current in the motor mode decreased by 8%.

ACS Style

Vladimir Dmitrievskii; Vladimir Prakht; Alecksey Anuchin; Vadim Kazakbaev. Design Optimization of a Traction Synchronous Homopolar Motor. Mathematics 2021, 9, 1352 .

AMA Style

Vladimir Dmitrievskii, Vladimir Prakht, Alecksey Anuchin, Vadim Kazakbaev. Design Optimization of a Traction Synchronous Homopolar Motor. Mathematics. 2021; 9 (12):1352.

Chicago/Turabian Style

Vladimir Dmitrievskii; Vladimir Prakht; Alecksey Anuchin; Vadim Kazakbaev. 2021. "Design Optimization of a Traction Synchronous Homopolar Motor." Mathematics 9, no. 12: 1352.

Journal article
Published: 05 June 2021 in Mathematics
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Reliability, along with energy efficiency, is an important characteristic of pump units in various applications. In practical pump applications, it is important to strike a balance between reliability and energy efficiency. These indicators strongly depend on the applied control method of the pump unit. This study analyzes a trade-off method for regulating a system with three parallel pumps equipped with only one frequency converter (multi-pump single-drive system). A typical operating cycle of a pumping system with variable flow rate requirements is considered. The proposed trade-off method is compared with the traditional regulation, when a change in the operating point of the pump is achieved only by changing the rotation speed, and with the method for maximum reliability. It is shown that the proposed trade-off method makes it possible to ensure sufficient reliability of the multi-pump system operation without a significant increase in energy consumption.

ACS Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii. Improving Reliability and Energy Efficiency of Three Parallel Pumps by Selecting Trade-Off Operating Points. Mathematics 2021, 9, 1297 .

AMA Style

Safarbek Oshurbekov, Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii. Improving Reliability and Energy Efficiency of Three Parallel Pumps by Selecting Trade-Off Operating Points. Mathematics. 2021; 9 (11):1297.

Chicago/Turabian Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii. 2021. "Improving Reliability and Energy Efficiency of Three Parallel Pumps by Selecting Trade-Off Operating Points." Mathematics 9, no. 11: 1297.

Journal article
Published: 29 March 2021 in Mathematics
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The permanent magnet flux-switching machine (PMFSM) is one of the most promising machines with magnets inserted into the stator. To determine in which applications the use of PMFSM is promising, it is essential to compare the PMFSM with machines of other types. This study provides a theoretical comparison of the PMFSM with a conventional interior permanent magnet synchronous machine (IPMSM) in the gearless generator of a low-power wind turbine (332 rpm, 51.4 Nm). To provide a fair comparison, both machines are optimized using the Nelder–Mead algorithm. The minimized optimization objectives are the required power of frequency converter, cost of active materials, torque ripple and losses of a generator averaged over the working profile of the wind turbine. In order to reduce the computational time, the substituting profile method is applied. Based on the results of the calculations, the advantages and disadvantages of the considered machines were revealed: the IPMSM has significantly lower losses and higher efficiency than the PMFSM, and the PMFSM requires much less rare-earth magnets and copper and is, therefore, cheaper in mass production.

ACS Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev; Ekaterina Andriushchenko. Comparison of Flux-Switching and Interior Permanent Magnet Synchronous Generators for Direct-Driven Wind Applications Based on Nelder–Mead Optimal Designing. Mathematics 2021, 9, 732 .

AMA Style

Vladimir Prakht, Vladimir Dmitrievskii, Vadim Kazakbaev, Ekaterina Andriushchenko. Comparison of Flux-Switching and Interior Permanent Magnet Synchronous Generators for Direct-Driven Wind Applications Based on Nelder–Mead Optimal Designing. Mathematics. 2021; 9 (7):732.

Chicago/Turabian Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev; Ekaterina Andriushchenko. 2021. "Comparison of Flux-Switching and Interior Permanent Magnet Synchronous Generators for Direct-Driven Wind Applications Based on Nelder–Mead Optimal Designing." Mathematics 9, no. 7: 732.

Journal article
Published: 23 February 2021 in Electrical Engineering & Electromechanics
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Aim. The comparative analysis of energy consumption, electricity costs during lifetime cycle and payback period of a pump unit with 90 kW 2-pole induction motors, belonging to various energy efficiency classes, feeding directly from power grid. Methods. The examined operating modes aligned with a typical operating cycle of a pump unit with approximately constant flow rate of 75-110 % of the rated flow. The calculations were based on the pump and induction motors nameplate data, which, in their turn, were based on the manufacturers’ experimental data. Results. The calculations of energy consumption, electricity costs and payback periods of a pump unit with 90 kW 2-pole induction motors, feeding directly from power grid have been performed in the article. The application of induction motors belonging to IE2, IE3 and IE4 energy efficiency classes has been discussed. Practical value. It has been demonstrated, than in case of replacement of an induction motor of energy efficiency class IE2 due to planned retrofit, payback period for an IE4 induction motor is 2.18 years, energy savings within a calculated 20-year operating period are 268MW·h, which makes €41110 in money terms. Under the same conditions, the replacement of an induction motor of energy efficiency class IE2 with an induction motor of energy efficiency class IE3 will allow to save 88 MW·h within a calculated operating period, which, expressed in monetary terms, is €13500 and the payback period is 5.11 years. Thus, the article proves that despite a higher initial price, the choice of an induction motor of energy efficiency class IE4 tends to be more economically advantageous.

ACS Style

V.V. Goman; V.A. Prakht; V.M. Kazakbaev; V.A. Dmitrievskii; E.A. Valeev; A.S. Paramonov. Analysis of the payback period of a modernized pump unit with induction electric motors of advanced energy efficiency classes. Electrical Engineering & Electromechanics 2021, 15 -19.

AMA Style

V.V. Goman, V.A. Prakht, V.M. Kazakbaev, V.A. Dmitrievskii, E.A. Valeev, A.S. Paramonov. Analysis of the payback period of a modernized pump unit with induction electric motors of advanced energy efficiency classes. Electrical Engineering & Electromechanics. 2021; (1):15-19.

Chicago/Turabian Style

V.V. Goman; V.A. Prakht; V.M. Kazakbaev; V.A. Dmitrievskii; E.A. Valeev; A.S. Paramonov. 2021. "Analysis of the payback period of a modernized pump unit with induction electric motors of advanced energy efficiency classes." Electrical Engineering & Electromechanics , no. 1: 15-19.

Journal article
Published: 28 January 2021 in Mathematics
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Single-phase flux reversal motors (FRMs) with sintered rare-earth permanent magnets on the stator for low-cost high-speed applications have a reliable rotor and a good specific power. However, to reduce eddy current loss, the sintered rare-earth magnets on the stator have to be segmented into several pieces and their cost increases with the number of magnet segments. An alternative to the sintered magnets can be bonded magnets, in which eddy current loss is almost absent. The remanence of bonded magnets is lower than that of sintered magnets, and they are prone to demagnetization. However, the cost of low-power motors with bonded magnets can be lower because of the simpler manufacturing technology and the lower material cost. This paper discusses various aspects of the optimal design of FRM with bonded magnets, applying the Nelder–Mead method. An objective function for optimizing an FRM with bonded magnets is designed to ensure the required efficiency, reduce torque oscillations, and prevent the bonded magnets from demagnetizing. As a result, it is shown that the FRM with bonded magnets has approximately the same efficiency as the FRM with sintered magnets. In addition, the peak-to-peak torque ripple is minimized and the minimal instantaneous torque is maximized.

ACS Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev. Optimal Design of a High-Speed Flux Reversal Motor with Bonded Rare-Earth Permanent Magnets. Mathematics 2021, 9, 256 .

AMA Style

Vladimir Prakht, Vladimir Dmitrievskii, Vadim Kazakbaev. Optimal Design of a High-Speed Flux Reversal Motor with Bonded Rare-Earth Permanent Magnets. Mathematics. 2021; 9 (3):256.

Chicago/Turabian Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev. 2021. "Optimal Design of a High-Speed Flux Reversal Motor with Bonded Rare-Earth Permanent Magnets." Mathematics 9, no. 3: 256.

Conference paper
Published: 27 January 2021 in 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED)
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The paper describes the implementation of a combined pump control strategy in order to increase its reliability and service life. With the help of combined control, the flow rate is controlled simultaneously by rotational speed variation, throttling, and bypass. The energy consumption of the pump unit is evaluated, and the reliability of its operation is examined according to three various flow rate control methods that are applied: with minimum energy consumption, with maximum reliability (service life), and a method that provides a trade-off between energy consumption and service life. Comparison of energy consumption in the considered cases shows that with the trade-off regulation method, energy consumption is 6.36% higher than with the help of the minimum energy consumption control. However, the combined control method allows achieving significant energy savings up to (20.6 % ) in comparison with the maximum reliability control method.

ACS Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Levon Gevorkov. Extending Pump Unit Service Life Using Combined Pump Control. 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED) 2021, 1 -6.

AMA Style

Safarbek Oshurbekov, Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii, Levon Gevorkov. Extending Pump Unit Service Life Using Combined Pump Control. 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED). 2021; ():1-6.

Chicago/Turabian Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Levon Gevorkov. 2021. "Extending Pump Unit Service Life Using Combined Pump Control." 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED) , no. : 1-6.

Short communication
Published: 22 December 2020 in Energy Reports
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Flux switching generators with permanent magnets (PMs) on the stator is a good alternative to traditional synchronous generators for gearless wind turbines. This paper is dedicated to the comparison of the 3-phase rare-earth and ferrite PM flux switching generators considered in gearless wind generator application (332 rpm, 1784 W). The machines are designed and optimized using the Nelder–Mead algorithm coupled with 2D FEM model. The objective function is built taking into account the following objectives: the average efficiency of the generators over the wind turbine profile, the required power of the AC–DC converter, the quantity of the magnets and the torque ripple. It is found that the ferrite PM flux switching generator can be an attractive alternative to the rare-earth one. The averaged efficiency of the generator with ferrite PM is higher by 4.1% than that of the rare-earth one. The active power of the ferrite generator is also higher in a wide range of powers. Although the mass of the ferrite PM generator is 2.4 times higher, the costs of the generators are approximately similar since the rare-earth magnets are much more expensive than ferrite ones.

ACS Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev; Mohamed N. Ibrahim. Comparison between rare-earth and ferrite permanent magnet flux-switching generators for gearless wind turbines. Energy Reports 2020, 6, 1365 -1369.

AMA Style

Vladimir Prakht, Vladimir Dmitrievskii, Vadim Kazakbaev, Mohamed N. Ibrahim. Comparison between rare-earth and ferrite permanent magnet flux-switching generators for gearless wind turbines. Energy Reports. 2020; 6 ():1365-1369.

Chicago/Turabian Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev; Mohamed N. Ibrahim. 2020. "Comparison between rare-earth and ferrite permanent magnet flux-switching generators for gearless wind turbines." Energy Reports 6, no. : 1365-1369.

Short communication
Published: 22 December 2020 in Energy Reports
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A single-phase Flux Reversal Machine for high speed applications has a reliable rotor and a good specific power. This paper shows that eliminating the regions of negative torque of this machine can be reached if an asymmetric rotor is used. This machine with an asymmetric rotor was compared with that with a symmetric rotor. In the rated loading mode, the calculated torque ripple of the flux reversal machine with the symmetric rotor is 297%, while that of the one with the asymmetric rotor is 185% which is less by 1.6 times. The proposed high-speed flux reversal machine with the asymmetric rotor can be applied in low-cost drives of household appliances (vacuum cleaners, hand dryers, blenders, washing machines) and in electric power hand tools (angular grinders, miter saws, drills) to replace single-phase synchronous motors or single-phase Hybrid Switched Reluctance Motors.

ACS Style

Vladimir Dmitrievskii; Vladimir Prakht; Vadim Kazakbaev. Novel rotor design for high-speed flux reversal motor. Energy Reports 2020, 6, 1544 -1549.

AMA Style

Vladimir Dmitrievskii, Vladimir Prakht, Vadim Kazakbaev. Novel rotor design for high-speed flux reversal motor. Energy Reports. 2020; 6 ():1544-1549.

Chicago/Turabian Style

Vladimir Dmitrievskii; Vladimir Prakht; Vadim Kazakbaev. 2020. "Novel rotor design for high-speed flux reversal motor." Energy Reports 6, no. : 1544-1549.

Journal article
Published: 09 December 2020 in Applied Sciences
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The energy efficiency of a multi-pump system consisting of two low-power (0.75 kW) pumps operating in parallel mode and a single-pump mechanism (1.5 kW) is compared in this study. For this purpose, mathematical models, experimental data, and data retrieved from the manuals provided by the pump manufacturers are used. The single-pump system is fed by a single variable speed drive. A multi-pump system running in parallel mode consists of two pumps. One of them is driven by an induction motor connected directly to the electrical grid and equipped with a throttle. Another pump is actuated by an induction motor fed by a variable speed drive. The flowrate of the liquid in the multi-pump is controlled with the help of speed variation and throttling. In the case of the single-pump system the conventional speed control method is applied during the analysis. For both pump system topologies, the daily and annual energy consumption is obtained. As a result of conducted calculations, it was shown that the multi-pump provides 29.8% savings in comparison to the single-pump system in the case of a typical flowrate profile.

ACS Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Levon Gevorkov. Energy Consumption Comparison of a Single Variable-Speed Pump and a System of Two Pumps: Variable-Speed and Fixed-Speed. Applied Sciences 2020, 10, 8820 .

AMA Style

Safarbek Oshurbekov, Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii, Levon Gevorkov. Energy Consumption Comparison of a Single Variable-Speed Pump and a System of Two Pumps: Variable-Speed and Fixed-Speed. Applied Sciences. 2020; 10 (24):8820.

Chicago/Turabian Style

Safarbek Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Levon Gevorkov. 2020. "Energy Consumption Comparison of a Single Variable-Speed Pump and a System of Two Pumps: Variable-Speed and Fixed-Speed." Applied Sciences 10, no. 24: 8820.

Journal article
Published: 29 November 2020 in Applied Sciences
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The high energy intensity of the modern industry and the threat of climate change determine the high urgency of increasing the energy efficiency of electric motors. In this paper, energy consumption, energy costs, payback periods, and CO2 emissions of 75 kW, 4 pole induction motors with direct grid supply in a fixed-speed pump unit are evaluated. Motors of the IE2, IE3, and IE4 efficiency classes according to IEC 60034-30-1 standard are compared in terms of life-time energy savings, payback period, and CO2 emissions. To carry out the analysis, polynomial interpolation of the data from the available manufacturer datasheets of the motors is used. It concluded that even though the initial investment cost of the IE4-motor is higher than that of IE3-motor, the IE4-motor is more profitable if more than 3 years of operation are considered and also provides significant reductions of CO2 emissions. The paper presents a calculation method of the aforementioned indicators which can be useful for companies, researchers, and engineers for quick assessment and selection of technical solutions.

ACS Style

Victor Goman; Vladimir Prakht; Vadim Kazakbaev; Vladimir Dmitrievskii. Comparative Study of Induction Motors of IE2, IE3 and IE4 Efficiency Classes in Pump Applications Taking into Account CO2 Emission Intensity. Applied Sciences 2020, 10, 8536 .

AMA Style

Victor Goman, Vladimir Prakht, Vadim Kazakbaev, Vladimir Dmitrievskii. Comparative Study of Induction Motors of IE2, IE3 and IE4 Efficiency Classes in Pump Applications Taking into Account CO2 Emission Intensity. Applied Sciences. 2020; 10 (23):8536.

Chicago/Turabian Style

Victor Goman; Vladimir Prakht; Vadim Kazakbaev; Vladimir Dmitrievskii. 2020. "Comparative Study of Induction Motors of IE2, IE3 and IE4 Efficiency Classes in Pump Applications Taking into Account CO2 Emission Intensity." Applied Sciences 10, no. 23: 8536.

Journal article
Published: 16 November 2020 in Applied Sciences
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The high energy intensity of the modern industry determines the high urgency of increasing the energy efficiency of production processes. However, a big number of motor types of enhanced efficiency classes are available on the market. The motor users can be confused about the choice of the right motor solution for a certain application. In this paper, to help with this choice the energy efficiency indicators of various types of electric motors in a low-power pump unit with a constant rotation speed are studied. Moreover, not only power losses in the motor are considered, but also power losses in the cable and transformer, which are influenced by the power factor of the motor. Induction motors (IMs) and synchronous motors powered directly from the grid (direct-on-line synchronous motor with permanent magnet in the rotor, DOL PMSM; direct-on-line synchronous reluctance motor without permanent magnet, DOL SynRM) of IE2, IE3, and IE4 energy efficiency classes are compared. To carry out the analysis, polynomial interpolation of the available catalogue data and experimental data of the motors are used. The main criteria for comparing different motors in this work are the energy savings over the pump’s life cycle and the payback period when replacing an IE2 motor with a motor of a higher energy efficiency class. The article shows that although the DOL PMSM has a lower motor efficiency than the DOL SynRM, it saves more energy due to its higher power factor, which reduces cable and transformer losses. It is also shown that, despite the highest initial cost, when taking into account cable and transformer losses, the payback period of DOL PMSM can be shorter than that of IE3 and IE4 induction motors. DOL SynRM has the shortest payback period in all considered cases, has no troublesome rare-earth permanent magnets, and can also be a valuable solution.

ACS Style

Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Dmitry Golovanov. Feasibility Study of Pump Units with Various Direct-On-Line Electric Motors Considering Cable and Transformer Losses. Applied Sciences 2020, 10, 8120 .

AMA Style

Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii, Dmitry Golovanov. Feasibility Study of Pump Units with Various Direct-On-Line Electric Motors Considering Cable and Transformer Losses. Applied Sciences. 2020; 10 (22):8120.

Chicago/Turabian Style

Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Dmitry Golovanov. 2020. "Feasibility Study of Pump Units with Various Direct-On-Line Electric Motors Considering Cable and Transformer Losses." Applied Sciences 10, no. 22: 8120.

Journal article
Published: 08 October 2020 in IEEE Access
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The synchronous homopolar motor (SHM) has been attracting the attention of researchers for many decades. Various mathematical models of SHM have been proposed to deal with its complicated magnetic circuit. Among them, there are time-consuming 3D finite element models (FEM), equivalent circuit models neglecting some significant features of the machine design, and 2D FEM models with virtual excitation winding distorting magnetic field picture. This paper proposes a novel 2D FEM of SHM and shows that since there are no sources of excitation in the cross-sections of the rotor and stator stacks, no virtual elements are required. This model uses the general solution of the Gauss’s law for magnetism containing excitation flux. The model is based on a set of magnetostatic boundary value problems for various rotor positions. The set of boundary problems is completed with the excitation equivalent circuit. The losses in the armature and field windings and in the stator and rotor magnetic cores are computed in postprocessing. All these computations are carried out for a single combination of stator and rotor stack. A symmetrization algorithm is proposed to extend the obtained results to the whole SHM. A comparison of the theoretical and experimental data for a nine-phase three-section 320 kW SHM is carried out. These SHMs were used in a mining truck with a carrying capacity of 90 tons.

ACS Style

Vladimir Dmitrievskii; Vladimir Prakht; Alecksey Anuchin; Vadim Kazakbaev. Traction Synchronous Homopolar Motor: Simplified Computation Technique and Experimental Validation. IEEE Access 2020, 8, 185112 -185120.

AMA Style

Vladimir Dmitrievskii, Vladimir Prakht, Alecksey Anuchin, Vadim Kazakbaev. Traction Synchronous Homopolar Motor: Simplified Computation Technique and Experimental Validation. IEEE Access. 2020; 8 (99):185112-185120.

Chicago/Turabian Style

Vladimir Dmitrievskii; Vladimir Prakht; Alecksey Anuchin; Vadim Kazakbaev. 2020. "Traction Synchronous Homopolar Motor: Simplified Computation Technique and Experimental Validation." IEEE Access 8, no. 99: 185112-185120.

Journal article
Published: 31 August 2020 in Applied Sciences
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Single-phase motors are used in low-power, cost-effective, variable-speed applications. As a replacement to traditional single-phase synchronous motors with magnets on the rotor, single-phase flux reversal motors (FRMs) with a rugged and reliable toothed rotor are considered for the high-speed applications. However, torque pulsations of single-phase motors are high. The aim of this work is to minimize the torque ripple and increase its minimum instantaneous value, as well as to reduce FRM losses. To solve this problem, an asymmetric rotor is used, and an objective function is proposed, which includes parameters characterizing the pulsations of the torque and the loss of FRM for two load conditions. To optimize the single-phase FRM and minimize the objective function, the Nelder–Mead method was applied. The optimization criterion was selected to maximize the efficiency, to reduce the torque ripple, and to the avoid the negative torque in a wide range of powers at the fan load (quadric dependence of torque on speed). Two operating loading modes are considered. After two stages of optimization, the peak-to-peak torque ripple in the FRM in the rated loading mode decreased by 1.7 times, and in the mode with reduced load by 2.7 times. In addition, in the FRM before optimization, the torque has sections with negative values, and in the FRM after optimization, the torque is positive over the entire period. Although losses in the rated mode increased by 4%, when underloaded, they decreased by 11%, which creates an additional advantage for applications that work most of the time with underload.

ACS Style

Vladimir Dmitrievskii; Vladimir Prakht; Vadim Kazakbaev; Dmitry Golovanov. Optimum Design of High-Speed Single-Phase Flux Reversal Motor with Reduced Torque Ripple. Applied Sciences 2020, 10, 6024 .

AMA Style

Vladimir Dmitrievskii, Vladimir Prakht, Vadim Kazakbaev, Dmitry Golovanov. Optimum Design of High-Speed Single-Phase Flux Reversal Motor with Reduced Torque Ripple. Applied Sciences. 2020; 10 (17):6024.

Chicago/Turabian Style

Vladimir Dmitrievskii; Vladimir Prakht; Vadim Kazakbaev; Dmitry Golovanov. 2020. "Optimum Design of High-Speed Single-Phase Flux Reversal Motor with Reduced Torque Ripple." Applied Sciences 10, no. 17: 6024.

Journal article
Published: 09 July 2020 in Energies
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The paper presents a comparative analysis of life-cycle energy consumption for three different types of 4 kW line-start motors used in a pump unit with throttling: the most widely used induction motor with IE3 efficiency class, line start permanent magnet synchronous motor with IE4 efficiency class and line start synchronous reluctance motor with IE4 efficiency class. The operating cycle for pump units with constant flow is considered for the above-mentioned types of motors taking into account not only the losses in the pump and motor, but also in the power supply cable. It is shown that the line start synchronous reluctance motor without magnets has the highest efficiency over the entire considered loading range. However, its power factor is lower than that of the synchronous motor with magnets and therefore it has more significant losses in power supply cable. Despite this disadvantage, the line-start reluctance motor is a good alternative to widespread induction motor since it allows saving of approximately 4000 euro more than the latter during the 20 years life cycle. It also provides similar savings in comparison to the permanent magnet synchronous motor, but unlike it, it does not have costly rare-earth materials in the rotor.

ACS Style

Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Safarbek Oshurbekov; Dmitry Golovanov. Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses. Energies 2020, 13, 3546 .

AMA Style

Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii, Safarbek Oshurbekov, Dmitry Golovanov. Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses. Energies. 2020; 13 (14):3546.

Chicago/Turabian Style

Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii; Safarbek Oshurbekov; Dmitry Golovanov. 2020. "Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses." Energies 13, no. 14: 3546.

Journal article
Published: 15 May 2020 in Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov
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Актуальность исследования обусловлена возрастающей потребностью применения автономных гибридных электростанций, использующих возобновляемые источники с целью уменьшения потребления органического топлива. Улучшение рабочих свойств и уменьшение стоимости безредукторных ветрогенераторов, применяемых в составе таких электростанций, способствует улучшению их технико-экономических характеристик. Цель: поиск эффективного подхода для оптимизации генератора с переключением потока для безредуктороной ветроустановки, позволяющего сократить применение вычислительных ресурсов, в сравнение с существующими подходами; выработка рекомендаций к проектированию ветрогенератора с переключением потока с постоянными магнитами на статоре; улучшение характеристик конструкции генератора, спроектированной ранее. Объекты: математическая модель и конструкция генератора с переключением потока с магнитами на статоре, математическая модель безредуктороной ветротурбины. Методы: безградиентный метод оптимизации, математическое моделирование, двухмерный метод конечных элементов, оценка и анализ скорости ветра в различных мировых регионах, статистические методы. Результаты. Произведена многокритериальная оптимизация конструкции безредуктороного ветрогенератора с переключением потока. В результате были улучшены энергетические характеристики генератора, снижены пульсации момента, а также снижена номинальная мощность электронного преобразователя ветроустановки. Получены общие рекомендации, относительно геометрии конструкции, которые могут быть использованы при проектировании таких генераторов. Предложен метод расчета замещающих профилей для характеристики цикла работы ветротурбины, которой может быть использован для снижения вычислительных затрат в процессе оптимизации ветрогенераторов. Показано сокращение вычислительных затрат с помощью полученного метода на примере замены исходной девятиточечной характеристики цикла работы ветротурбины на замещающий двухточечный профиль.

ACS Style

Владимир Алексеевич Прахт; Владимир Александрович Дмитриевский; Вадим Маратович Казакбаев. ОПТИМАЛЬНОЕ ПРОЕКТИРОВАНИЕ БЕЗРЕДУКТОРНОЙ МАШИНЫ С ПЕРЕКЛЮЧЕНИЕМ ПОТОКА ДЛЯ ВЕТРОГЕНЕРАТОРА. Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov 2020, 331, 97 -108.

AMA Style

Владимир Алексеевич Прахт, Владимир Александрович Дмитриевский, Вадим Маратович Казакбаев. ОПТИМАЛЬНОЕ ПРОЕКТИРОВАНИЕ БЕЗРЕДУКТОРНОЙ МАШИНЫ С ПЕРЕКЛЮЧЕНИЕМ ПОТОКА ДЛЯ ВЕТРОГЕНЕРАТОРА. Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov. 2020; 331 (5):97-108.

Chicago/Turabian Style

Владимир Алексеевич Прахт; Владимир Александрович Дмитриевский; Вадим Маратович Казакбаев. 2020. "ОПТИМАЛЬНОЕ ПРОЕКТИРОВАНИЕ БЕЗРЕДУКТОРНОЙ МАШИНЫ С ПЕРЕКЛЮЧЕНИЕМ ПОТОКА ДЛЯ ВЕТРОГЕНЕРАТОРА." Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov 331, no. 5: 97-108.

Journal article
Published: 21 April 2020 in Electrical Engineering & Electromechanics
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Цель. Исследование характеристик двух высокоскоростных однофазных электрических машин с магнитами на статоре (электрическая машина с переменным направлением потока и гибридная вентильно-индукторная реактивная машина): сравниваются такие характеристики как КПД, вес, стоимость активных материалов, номинальный ток элементов преобразователя частоты. Методика. Расчет характеристик электрической машины с помощью решения двухмерных краевых магнитостатических задач. Результаты. Произведено сопоставление двух типов однофазных машин с магнитами на статоре; получено расчетное сравнение характеристик однофазной электрической машины с переменным направлением потока и однофазной гибридной вентильно-индукторной реактивной машины; получены результаты сравнения массы и размеров КПД двух машин. Научная новизна. Впервые получены результаты сравнения однофазной электрической машины с переменным направлением потока и однофазной гибридной вентильно-индукторной реактивной машины. Практическое значение. Полученные результаты могут помочь при выборе лучшей конструкцией электродвигателя в рассматриваемых приложениях: электрический турбонаддув, бытовые приборы, вентиляторы, насосы и компрессоры малой мощности и т.д.

ACS Style

Vladimir Prakht; V. A. Dmitrievskii; Vadim Kazakbaev; S. Kh. Oshurbekov. COMPARATIVE ANALYSIS OF TWO HIGH-SPEED SINGLE-PHASE ELECTRICAL MACHINES WITH PERMANENT MAGNETS ON THE STATOR. Electrical Engineering & Electromechanics 2020, 20 -25.

AMA Style

Vladimir Prakht, V. A. Dmitrievskii, Vadim Kazakbaev, S. Kh. Oshurbekov. COMPARATIVE ANALYSIS OF TWO HIGH-SPEED SINGLE-PHASE ELECTRICAL MACHINES WITH PERMANENT MAGNETS ON THE STATOR. Electrical Engineering & Electromechanics. 2020; (2):20-25.

Chicago/Turabian Style

Vladimir Prakht; V. A. Dmitrievskii; Vadim Kazakbaev; S. Kh. Oshurbekov. 2020. "COMPARATIVE ANALYSIS OF TWO HIGH-SPEED SINGLE-PHASE ELECTRICAL MACHINES WITH PERMANENT MAGNETS ON THE STATOR." Electrical Engineering & Electromechanics , no. 2: 20-25.

Journal article
Published: 21 February 2020 in Electrical Engineering & Electromechanics
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ACS Style

Victor Goman; S. Kh. Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; V. A. Dmitrievskii. COMPARISON OF ENERGY CONSUMPTION OF VARIOUS ELECTRICAL MOTORS OPERATING IN A PUMPING UNIT. Electrical Engineering & Electromechanics 2020, 16 -24.

AMA Style

Victor Goman, S. Kh. Oshurbekov, Vadim Kazakbaev, Vladimir Prakht, V. A. Dmitrievskii. COMPARISON OF ENERGY CONSUMPTION OF VARIOUS ELECTRICAL MOTORS OPERATING IN A PUMPING UNIT. Electrical Engineering & Electromechanics. 2020; (1):16-24.

Chicago/Turabian Style

Victor Goman; S. Kh. Oshurbekov; Vadim Kazakbaev; Vladimir Prakht; V. A. Dmitrievskii. 2020. "COMPARISON OF ENERGY CONSUMPTION OF VARIOUS ELECTRICAL MOTORS OPERATING IN A PUMPING UNIT." Electrical Engineering & Electromechanics , no. 1: 16-24.

Journal article
Published: 06 February 2020 in Mathematics
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In this paper, the optimal design of the Flux-Switching Generator with ferrite magnets based on a two-mode substituting load profile for a gearless wind generator is considered. A one-criterion Nelder-Mead method is used to optimize the generator design. The optimization function is constructed mainly so as to minimize the average losses in the generator and the required AC–DC converter power. Also, the Flux-Switching Generator torque-ripple and the ferrite magnets volume are minimized. Using substituting profiles instead of initial ones reduces the calculation efforts substantially. The paper contains the analysis of the optimal design of the Flux-Switching Generator with ferrite magnets.

ACS Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev. Optimal Design of Gearless Flux-Switching Generator with Ferrite Permanent Magnets. Mathematics 2020, 8, 206 .

AMA Style

Vladimir Prakht, Vladimir Dmitrievskii, Vadim Kazakbaev. Optimal Design of Gearless Flux-Switching Generator with Ferrite Permanent Magnets. Mathematics. 2020; 8 (2):206.

Chicago/Turabian Style

Vladimir Prakht; Vladimir Dmitrievskii; Vadim Kazakbaev. 2020. "Optimal Design of Gearless Flux-Switching Generator with Ferrite Permanent Magnets." Mathematics 8, no. 2: 206.

Conference paper
Published: 01 January 2020 in 2020 27th International Workshop on Electric Drives: MPEI Department of Electric Drives 90th Anniversary (IWED)
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In this paper, a model of stand-alone variable rotational speed generator set is presented. The generator set of a low rated power (1.2 kW) with a combustion engine and a synchronous reluctance generator is considered. Using the presented model, energy characteristics of the generator set can be calculated considering all main types of power losses in the combustion engine, generator and frequency converter. Dynamic performances of the generator set can be also calculated. The proposed approach can be also used to model the performances of generator sets with other types of electric machines. The objectives of the study are to develop the dynamic model considering power losses in the frequency converter and to propose a quantitative assessment of the fuel savings of the variable speed control in the considered low power generator set.

ACS Style

Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii. Analysis of Power Losses in Stand-Alone Variable Speed Synchronous Reluctance Generator. 2020 27th International Workshop on Electric Drives: MPEI Department of Electric Drives 90th Anniversary (IWED) 2020, 1 -5.

AMA Style

Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii. Analysis of Power Losses in Stand-Alone Variable Speed Synchronous Reluctance Generator. 2020 27th International Workshop on Electric Drives: MPEI Department of Electric Drives 90th Anniversary (IWED). 2020; ():1-5.

Chicago/Turabian Style

Vadim Kazakbaev; Vladimir Prakht; Vladimir Dmitrievskii. 2020. "Analysis of Power Losses in Stand-Alone Variable Speed Synchronous Reluctance Generator." 2020 27th International Workshop on Electric Drives: MPEI Department of Electric Drives 90th Anniversary (IWED) , no. : 1-5.