Title :
A method for predicting the expected life of bus capacitors
Author :
Gasperi, Michael L.
Author_Institution :
Adv. Technol. Labs., Rockwell Autom., Milwaukee, WI, USA
Abstract :
Predicting the expected life of motor drive bus capacitors is complicated by several factors: the equivalent series resistance of aluminum electrolytic capacitors is frequency and temperature sensitive; the ripple current is a composite waveform; and the capacitor expected life is very sensitive to operating temperature. This paper describes a method that addresses all these factors by developing separate models for capacitor equivalent series resistance, motor drive circuitry, heat transfer conditions and capacitor life
Keywords :
electrolytic capacitors; motor drives; power capacitors; thermal analysis; aluminum electrolytic capacitors; capacitor life; composite waveform; equivalent series resistance; expected life prediction; heat transfer conditions; motor drive bus capacitors; motor drive circuitry; operating temperature; ripple current; Aluminum; Capacitors; Dielectric losses; Frequency; Heat transfer; Heating; Motor drives; Paramagnetic resonance; Temperature sensors; Voltage;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.628989
