Open AccessTechnical and economic aspects of the use of soft starters for asynchronous electric drives
Author(s) -
K. N. Lebedev,
G. V. Lebedeva,
N. N. Gracheva
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/659/1/012027
Subject(s) - motor soft starter , momentum (technical analysis) , amplitude , oscillation (cell signaling) , control theory (sociology) , induction motor , asynchronous communication , electric motor , computer science , engineering , control engineering , mechanical engineering , voltage , physics , electrical engineering , economics , telecommunications , control (management) , finance , quantum mechanics , artificial intelligence , biology , genetics
The paper presents data on the results of computer-aided mathematical modeling and experimental studies of transient processes accompanying the start of asynchronous electric drives in order to search for the methods that enable the adjustment of a soft starter to achieve minimum oscillation amplitude of the electric motor dynamic momentum in terms of the current characteristic. The indicators of smoothness, applicable to some types of electric drives of turbine mechanisms, are revealed. It is found that the correlation between the maximum value of the starting current of the electric motor and the maximum amplitude of the momentum fluctuation, as well as between the starting time and the maximum amplitude of the momentum fluctuation, is insignificant. The most informative indicator, providing the function of adaptive self-tuning of the soft starter and maximum technical and economic efficiency of its use, is the oscillation of the dynamic momentum during the start-up. It is established that the amplitude of the dynamic momentum fluctuation can be judged by the displacement of the motor housing during start-up, which will require the modernization of the electric drive. The necessity of additionally calculating the implicit components of costs in terms of the costs of entrepreneurial risk when assessing the economic effect from the modernization of asynchronous electric drives using a soft starter is substantiated.