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Prediction of the operational impedance of rotating machines by various DC testing methods
Author(s) -
Yamamoto Shu,
Gotou Takashi,
Ara Takahiro
Publication year - 2004
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.10348
Subject(s) - stator , rotor (electric) , ripple , voltage , power (physics) , electrical impedance , torque ripple , current (fluid) , induction motor , electrical engineering , engineering , control theory (sociology) , computer science , physics , direct torque control , control (management) , quantum mechanics , artificial intelligence
This paper presents methods to determine the operational impedance of rotating machines by Fourier transformation of the voltage and current measured when a step (or pulse) voltage is applied to the two stator winding terminals. These standstill tests using a small‐capacity DC power supply unit are tentatively termed DC testing methods. We also describe in detail the case using a DC power source with ripple and the case in which a step (or pulse) voltage is applied with current flowing. These methods are applied to a 5.5‐kW squirrel‐cage induction motor having semiclosed rotor slots. The validity of the proposed prediction methods is demonstrated by comparing the calculated and measured speed characteristics of the tested induction machine. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 147(4): 51–59, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10348