Simulation of a direct torque control system in the presence of winding asymmetry in induction motor

Goolak, Sergey; Liubarskyi, Borys; Riabov, Ievgen; Chepurna, Nataliia; Pohosov, Oleksandr

doi:10.1088/2631-8695/acde46

Eng. Res. Express

2023

DOI: 10.1088/2631-8695/acde46

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Simulation of a direct torque control system in the presence of winding asymmetry in induction motor

Sergey Goolak

Borys Liubarskyi

Ievgen Riabov

et al.

Abstract: The operation of a direct torque control (DTC) system for induction motors with the possible presence of unbalanced modes in the motor windings is studied. It is shown that in the presence of asymmetric modes in the motor windings, the classical DTC algorithm becomes unstable. It is proposed to improve the DTC by taking into account the unbalance of the active resistances of the motor stator windings when determining the DTC parameters. This will make it possible to study electrodynamic processes in DTC with t… Show more

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Cited by 2 publications

References 57 publications

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Strength Analysis of an Open Car Body with Honeycomb Elements during Ro-Ro Transportation

Gerlici,

Lovska,

Fomin

et al. 2023

Applied Sciences

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This article presents the determination of the bearing structure loads of an open car during ro-ro transportation. A special solution for an open car is the application of elastic, viscous honeycomb panels in the frame. This engineering solution can decrease the load of the bearing structure of an open car during interactions with multiple-use lashing devices. This article presents the mathematic modelling of the dynamic load of an open car during ro-ro transportation. This calculation is based on the most popular load diagrams for the bearing structure of an open car applied for sea transportation, namely the rolling motion and the turning motion of a train ferry approaching a dock. It was found that the application of honeycomb panels can decrease the dynamic load of a rail car in comparison to a standard structure by about 25%. The results of the strength calculation of the bearing structure of an open car demonstrated that the maximum equivalent stresses do not exceed the allowable values and are 30% lower than the stresses that emerging in the standard structure. The conducted research can be used by engineers who are concerned about safe and environmentally friendly transportation via train ferries and more efficient ro-ro transportation.

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Strength Analysis of an Open Car Body with Honeycomb Elements during Ro-Ro Transportation

Gerlici,

Lovska,

Fomin

et al. 2023

Applied Sciences

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Research on and Assessment of the Reliability of Railway Transport Systems with Induction Motors

Gubarevych,

Duer,

Melkonova

et al. 2023

Energies

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Increasing the efficiency and reliability of modern railway transport is accompanied by an increase in monitoring and diagnostic systems for the current state of electric drives. Modern railway transport contains a large number of induction motors to ensure the operation of the drives of various mechanisms. In the article, based on the operational statistics of engine failures and the proposed scheme for diagnosing them, studies were carried out and a model was developed for assessing the reliability of a transport system equipped with an on-board diagnostic system for the current state. When building the models, the Markov method was used, including the construction of graphs for the five most relevant states of the induction electric motor during operation. The results obtained are relevant for evaluating the effectiveness of using the built-in diagnostic system and scheduling routine maintenance, which will affect the efficiency of railway transport. Based on the process of the diagnosis of railway transport systems with induction motors, five operating states of the object studied were interpreted: the state of full operation, state “S0”; the state of incomplete serviceability, state “S1”; critical serviceability, state “S2”; the state of the pre-damage condition, state “S3”; the state of unserviceability (defect), state “S4”. Subsequently, a five-state model of the operation process of railway transport systems with induction motors was developed. This model is also described by equations of state: Kolmogorov–Chapman equations. The reliability quantities determined form the basis for simulation reliability studies. The effect of the simulation study is the reliability quantities determined in the form of reliability functions and probabilities of the occurrences of the operating states of railway transport systems with induction motors; an important part of the reliability study of the system examined is to estimate the times of the occurrences in the object studied of the operating states in the future.

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Simulation of a direct torque control system in the presence of winding asymmetry in induction motor

Cited by 2 publications

References 57 publications

Strength Analysis of an Open Car Body with Honeycomb Elements during Ro-Ro Transportation

Strength Analysis of an Open Car Body with Honeycomb Elements during Ro-Ro Transportation

Research on and Assessment of the Reliability of Railway Transport Systems with Induction Motors

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