Investigation of energy indicators with asymmetry of the voltage of the power source of mainline electric locomotives of alternating current

Berdiev, Usan; Burkhankhodzhaev, Abitkhodja; Tuychieva, Malika Nabievna; Iksar, Elena; Usmonov, Komil

doi:10.1063/5.0131839

Cited by 6 publications

(8 citation statements)

References 2 publications

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“…The speed instability coefficient was calculated using the formula: The time diagrams of the phase values of the stator currents (Figure 18), rotational speed of the motor shaft (Figure 19), torque (Figure 20), and power consumption (Figure 21) were used to obtain the corresponding parameters in the steady-state speed modes (Table 10). As asymmetry of the phase currents could be observed in the electric drive with vector control, the phase current unbalance factor was calculated using Equation (18). The results are presented in Table 10.…”

Section: Modeling Results In the Presence Of Load Disturbances Of The...mentioning

confidence: 99%

“…An electric rolling stock can be conventionally classified by the nature of its operation as either mainline [18,19], urban [20,21], suburban [22,23], or quarry [24,25]. The choice of a control system that takes into account the operating conditions of an electric rolling stock is an important task during the design of an electric traction drive.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Goolak¹,

Liubarskyi

Riabov

et al. 2023

Energies

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An analysis of the operating conditions of the traction drives of an electric rolling stock with asynchronous traction motors was conducted. In the process of operation, the electric traction drive with both direct torque control and vector control was found to possibly experience unstable modes, both in terms of power supply and load. The models of electric locomotive traction drives with asynchronous electric motors with either vector or direct torque control were adapted to account for the possible presence of the aforementioned operational factors. As a result of the modeling, the starting characteristics of the electric traction drives with different control systems were obtained both in the absence and in the presence of power supply and load disturbances. The following cases were investigated for the drive with vector and direct torque control in the absence of power supply and torque disturbances: drive output at the rated speed of rotation of the electric motor shaft; 10% reduction in the rated speed; 10% increase in the rated speed. The comparison of the results obtained has demonstrated that, at lower than nominal frequencies, the electric traction drive with direct torque control has higher accuracy in its regulation of the rotational speed and torque, lower power consumption from the power supply, lower torque overshooting, but a higher level of torque pulsations than the electric traction drive with vector control. Meanwhile, at higher than nominal frequencies, the vector control has higher accuracy in its regulation of the speed, lower torque overshooting, shorter duration of transient processes, and lower torque pulsations than the direct torque control. Moreover, as a result of the investigations, the traction drive with direct torque control has been found to be more resistant to power supply and load disturbances. The results of this work are applicable to the investigation of the influence of electric traction drive control methods on the energy efficiency of the traction drive of an electric locomotive with an alternating current (AC).

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Section: Modeling Results In the Presence Of Load Disturbances Of The...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Goolak¹,

Liubarskyi

Riabov

et al. 2023

Energies

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“…In any technical applications, certain properties of solids are used: electrical, magnetic, optical, thermal, mechanical, corrosion-resistant, etc. [4,6]. The production of magnetic materials with low energy losses during remagnetization is one of the urgent problems of the industry today.…”

Section: Introductionmentioning

confidence: 99%

Methods of new technological developments of electric motors based on soft magnetic materials

Berdiev,

Kolesnikov,

Tuychieva

et al. 2023

E3S Web of Conf.

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Application conditions of composite materials based on ASC100.29 iron powders with an oxide coating in electrical machine devices as a stator with improved performance are considered in the article. The conditions for increasing the stability of the operation of electric motors are determined based on changes in the thickness of the oxide layer. Three-dimensional models of magnetic circuits were used, which made it possible to achieve a force of up to 4500 N with a torque of 3 to 8 Nm, which made it possible to obtain an engine power of 100-200 W. As a result, experimental characteristics of dependences μ=f(h), H=f(h)) and the power of specific losses on the thickness of the oxide coating ωyд=f(h) were obtained. Methods for measuring the dynamic characteristics of the stator magnetic circuit are determined.

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“…Most railway electric vehicles use valve motors, which are used to rotate the main equipment. Some elements of these electric motors are made of composite soft magnetic alloys [1,4].…”

Section: Introductionmentioning

confidence: 99%

“…Despite the fact that research and development of such materials have been carried out since the beginning of the last century, studying the mechanism of magnetization reversal and improving the quality of these materials is still relevant today.This is due to the fact that magnetic materials are widely used in various electrical devices (generators, electric motors, measuring installations, inductors, etc.) [4,6,7].…”

Section: Introductionmentioning

confidence: 99%

Use of composite alloys for two stator-valve electric motors

Berdiyev,

Sulaymonov,

Mirakhmedova

2023

E3S Web Conf.

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The article discusses the methods of using composite soft magnetic alloys for two stator-valve motors of electric transports in railways. The main groups of alloys are studied, which sharply differ in the shape of the hysteresis curve and the values of the main magnetic characteristics. Variable magnetization applied as cores of electric transports. It has been established that structural changes causing the rise of mechanical and magnetic hardness of alloys.

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Investigation of energy indicators with asymmetry of the voltage of the power source of mainline electric locomotives of alternating current

Cited by 6 publications

References 2 publications

Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Analysis of the Efficiency of Traction Drive Control Systems of Electric Locomotives with Asynchronous Traction Motors

Methods of new technological developments of electric motors based on soft magnetic materials

Use of composite alloys for two stator-valve electric motors

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