Spectral Analysis of Rotor Currents in Frequency-controlled Electric Drives

DOI

10.2991/amee-17.2017.26How to use a DOI?

Keywords

squirrel-cage induction motor; slip-ring rotor motor; frequency control; rotor current; spectral analysis; experimental studies; efficiency

Abstract

The results of researches of asynchronous electric drives with the frequency control which are carried out for the purpose of establishment of causes and effect relationships between a control method, the implementable standard frequency converter of the Schneider Electric company (ATV-71, ATV-32) and its efficiency are given in article. Tests with asynchronous motors with wound rotor were for the first time carried out. It allowed registering during the experiments the instantaneous values not only the stator currents, but also rotor currents. Authors for the first time applied spectrum analysis of stator and rotor currents, it showed that ®sensorless vector¯ control leads to origin of high-frequency harmonicas with the considerable amplitude and, as a result of they are non-sinusoidal of the created moment and inefficiency of the electric drive. The accelerations that are carried out during the researches to 94, 157 and 251 Rad/s confirmed this feature of vector control that appears incapable to linearize the asynchronous electric drive as it was supposed authors of a method. These results do not contradict theoretical provisions if not to neglect assumptions which usually become in case of an output of the equations of vector control. Unfortunately, the modern researchers do not subject these assumptions to doubts. Continued studies makes it possible to create an effective frequency management of asynchronous electric drives required for current technology.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - V.L. Kodkin
AU  - A.S. Anikin
AU  - A.A. Baldenkov
PY  - 2017/09
DA  - 2017/09
TI  - Spectral Analysis of Rotor Currents in Frequency-controlled Electric Drives
BT  - Proceedings of the 2017 2nd International Conference on Automation, Mechanical and Electrical Engineering (AMEE 2017)
PB  - Atlantis Press
SP  - 124
EP  - 128
SN  - 2352-5401
UR  - https://doi.org/10.2991/amee-17.2017.26
DO  - 10.2991/amee-17.2017.26
ID  - Kodkin2017/09
ER  -