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Approaches to suppressing shaft voltage in brushless DC motor driven by PWM inverter
Author(s) -
Iimori Kenichi,
Shinohara Katsuji,
Yamamoto Kichiro,
Morigami Atsushi
Publication year - 2009
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.20701
Subject(s) - stator , electromagnetic coil , voltage , waveform , rotor (electric) , dc motor , common mode signal , pulse width modulation , ac motor , control theory (sociology) , electrical engineering , inverter , capacitance , universal motor , physics , engineering , computer science , electrode , control (management) , digital signal processing , artificial intelligence , quantum mechanics , analog signal
This paper describes the approaches to suppressing the shaft voltage and bearing current by electrostatically shielding the stator end windings of the brushless DC motor driven by PWM inverter. At first, measured shaft voltage and bearing current are compared with those calculated waveforms to verify the common mode equivalent circuit of the brushless DC motor. Next, the relationship between shaft voltage and stator winding to rotor capacitance is calculated using the common mode equivalent circuit. Finally, the electrostatic shielding of the stator end windings is evaluated to reduce the shaft voltage by experiments and calculations. ©2008 Wiley Periodicals, Inc. Electr Eng Jpn, 166(4): 73–79, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20701