TY - GEN
T1 - Condition monitoring of DC link electrolytic capacitors in adjustable speed drives
AU - Kim, Myungchul
AU - Lee, Kwangwoon
AU - Yoon, Jangho
AU - Lee, Sang Bin
AU - Yoo, Jiyoon
PY - 2007
Y1 - 2007
N2 - A new sensorless technique for monitoring the condition of inverter dc link aluminum electrolytic capacitors based on equivalent series resistance, ESR, and capacitance, C, estimation is proposed in this paper. The main concept of the proposed method is to estimate ESR and C of the capacitor using the inverter whenever the motor is stopped. The parameters are estimated from the dc link voltage and stator current measurements available in the inverter with the switched dc link voltage applied to the motor stator winding. The temperature of the capacitor can also be estimated under thermal equilibrium based on the stator resistance estimate to take the influence of temperature variation into account. An experimental study on a 250W permanent magnet synchronous motor performed under accelerated capacitor degradation is presented to verify the proposed technique. It is shown that the proposed method provides a reliable and sensitive indication of capacitor aging without additional hardware requirements.
AB - A new sensorless technique for monitoring the condition of inverter dc link aluminum electrolytic capacitors based on equivalent series resistance, ESR, and capacitance, C, estimation is proposed in this paper. The main concept of the proposed method is to estimate ESR and C of the capacitor using the inverter whenever the motor is stopped. The parameters are estimated from the dc link voltage and stator current measurements available in the inverter with the switched dc link voltage applied to the motor stator winding. The temperature of the capacitor can also be estimated under thermal equilibrium based on the stator resistance estimate to take the influence of temperature variation into account. An experimental study on a 250W permanent magnet synchronous motor performed under accelerated capacitor degradation is presented to verify the proposed technique. It is shown that the proposed method provides a reliable and sensitive indication of capacitor aging without additional hardware requirements.
KW - Adjustable speed drive
KW - Aluminum electrolytic capcitor
KW - Capacitane
KW - Condition monitoring
KW - Dc link capacitor
KW - Diagnostics
KW - Electrolyte
KW - Equivalent Series Resistance (ESR)
KW - Stator resistance estimation
UR - http://www.scopus.com/inward/record.url?scp=48949097937&partnerID=8YFLogxK
U2 - 10.1109/07ias.2007.43
DO - 10.1109/07ias.2007.43
M3 - Conference contribution
AN - SCOPUS:48949097937
SN - 1424403642
SN - 9781424403646
T3 - Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)
SP - 237
EP - 243
BT - Conference Record of the 2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS
Y2 - 23 September 2007 through 27 September 2007
ER -