Model of pulsating current traction motor taking into consideration magnetic losses in steel

Goolak, Sergey; Riabov, Ievgen; Tkachenko, Viktor; Sapronova, Svitlana; Rubanik, I.

doi:10.20998/2074-272x.2021.6.02

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…The option was studied when one of the sections of the diesel locomotive was converted and a storage device was installed on it. For this purpose, it is necessary to use semiconductor converters for powering and controlling electric motors, which, in this case, will work with current pulsations [52,53]. A possible version of the construction of the traction system of the locomotive is shown in Figure 7 (the diesel section does not change; its traction system is shown in Figure 3).…”

Section: Modeling the Movement Of A Train With A Diesel Locomotive As...mentioning

confidence: 99%

An Estimation of the Energy Savings of a Mainline Diesel Locomotive Equipped with an Energy Storage Device

Riabov,

Goolak,

Neduzha

2024

Vehicles

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The method of improving a two-section mainline diesel locomotive by using energy storage in the traction system is considered. A mathematical model was developed to study the movement of a diesel locomotive based on the recommendations and provisions of the theory of locomotive traction. For this purpose, the movement of a diesel locomotive as part of a train along a given section of a track was studied. It was determined that the use of an energy storage device on a diesel locomotive will allow up to 64% of the energy spent on train traction to accumulate. The use of energy storage in the accumulator during electrodynamic braking ensured a reduction in fuel consumption by about 50%, regardless of the options for equipping the traction system of the diesel locomotive with an energy accumulator. It is established that regardless of the options for equipping the traction system of the diesel locomotive with an energy storage device, the indicators characterizing the degree of use of the diesel engine do not change. These research results can be used in works devoted to the improvement of the control system of energy exchange between the accumulator and traction engines of diesel locomotives.

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Section: Modeling the Movement Of A Train With A Diesel Locomotive As...mentioning

confidence: 99%

An Estimation of the Energy Savings of a Mainline Diesel Locomotive Equipped with an Energy Storage Device

Riabov,

Goolak,

Neduzha

2024

Vehicles

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“…Проведемо аналіз публікацій щодо електричних втрат у ДПС за полігармонічного живлення. У [7] розглянуто модель для розрахунку електричних втрат у ДПС за полігармонічного живлення з урахуванням нелінійності кривої намагнічування сталі магнітопроводу якоря. Аналогічну модель запропоновано в [5] для транзисторного електропривода тролейбуса з двигунами змішаного збудження.…”

Section: методикаunclassified

Increasing the Energy Efficiency of Traction Electric Drives of Direct Current

Kovalov,

Kovalova

2024

STP

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Purpose. The work is aimed at improving the energy efficiency of direct current traction electric drives of electric transport by introducing transistor pulse width converters (PWC) with an optimal switching frequency to minimize total electrical losses in the electric drive. The electrical losses of traction electric drives consist of electrical losses in the armature winding and in the PWC transistors. Methodology. To study the dependence on the switching frequency of transistors, the electrical losses in the armature winding and PWC transistors are divided into two parts: static losses from the direct current component of the current and dynamic losses, i.e., losses in the armature winding from harmonic current components and losses in the transistors from transient switching currents. Since the dynamic electrical losses in transistors increase with increasing frequency and decrease in the armature winding, it is necessary to find the optimal PWC co-mutation frequency at which the total dynamic losses in the traction electric drive will be minimal. The goal of increasing energy efficiency in a traction electric drive is achieved by determining the dependence of dynamic electrical losses in the armature winding on the switching frequency of the PWC and computer modeling of the transistor electric drive. Findings. It is found that the relative dynamic electrical losses in the armature winding in the case of polyharmonic power supply are equal to the square of the armature current ripple coefficient. An algorithm for determining the optimal switching frequency of the PWC is developed: 1) the dependence of dynamic electrical losses on the switching frequency of transistors is determined experimentally on computer models of the motor and PWC; 2) the graph of the dependence of total dynamic electrical losses of the transistor electric drive on the time-tothe point of minimum losses, which corresponds to the optimal frequency value, is determined. Originality. For the first time, the authors obtained an analytical expression for the relative dynamic electrical losses in the armature windings, which are equal to the square of the armature current ripple factor. Practical value. Establishing the optimal switching frequency of the PWC according to the developed methodology reduces electrical losses in traction electric drives, i.e., increases their energy efficiency.

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“…The implementation of the traction motor model, taking into account the nonlinear nature of the change in the values of the inductance of the armature and excitation windings from changes in the corresponding currents and taking into account magnetic losses in the motor steel, is given in the study [9]. But even in this study, losses in the traction motor from the action of eddy currents are not taken into account.…”

Section: Introductionmentioning

confidence: 99%

Determination of voltage at the rectifier installation of the electric locomotive VL-80K for each position of the controller driver's

Goolak¹,

Yermolenko²,

Ткаченко³

et al. 2022

TAPR

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The object of research is the electrical processes in the control system of the traction drive of the electric locomotive VL-80K (Russia). To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters determined during experimental studies of the traction drive control system. In particular, it is important to use in the traction drive model the value of the voltages on the arms of the rectifier installation of the electric locomotive, taking into account the position of the driver's controller. The complexity of the simulation lies in the fact that the reference does not provide the value of the voltage on the arms of the rectifier for each position of the driver's controller, which makes it difficult to verify the resulting model. A scheme for measuring the voltage value on the arms of the rectifier installation of an electric locomotive for each position of the position of the driver's controller is proposed. On its basis, a simulation model is developed in the MATLAB software environment. The simulation model implements an algorithm for closing the contactors of the electric group contactor for each position of the position of the driver's controller. Approbation of the voltage measurement technique was carried out on an electric locomotive of the VL-80K series during a trip on the Darnytsia-Myronivka section (Ukraine). Comparison of the voltage values on the arms of the rectifier installation, obtained experimentally, with the passport data showed that the measurement error was 0.5 %. In addition, the experimental results showed that the voltages on the arms of the rectifier for paired positions of the position of the driver's controller are the same, for odd ones they are different. Therefore, when simulating the operation of the traction drive control system, the voltage values on different arms of the rectifier installation were taken separately. Comparison of the simulation results for the nominal mode with passport data showed that for this mode the measurement error was 3.78 %. For all others, it did not exceed 5 %.

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Model of pulsating current traction motor taking into consideration magnetic losses in steel

Cited by 3 publications

References 20 publications

An Estimation of the Energy Savings of a Mainline Diesel Locomotive Equipped with an Energy Storage Device

An Estimation of the Energy Savings of a Mainline Diesel Locomotive Equipped with an Energy Storage Device

Increasing the Energy Efficiency of Traction Electric Drives of Direct Current

Determination of voltage at the rectifier installation of the electric locomotive VL-80K for each position of the controller driver's

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