Open AccessDetection of open circuit fault in battery power supply feeding permanent magnet synchronous motor
Author(s) -
Breznik Mitja,
Ambrožič Vanja,
Nemec Mitja
Publication year - 2018
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5214
Subject(s) - open circuit voltage , voltage , short circuit , battery (electricity) , fault (geology) , inverter , fault detection and isolation , electrical engineering , control theory (sociology) , computer science , engineering , power (physics) , physics , control (management) , quantum mechanics , artificial intelligence , seismology , geology , actuator
This study presents a model‐based method for detecting an open‐circuit fault in battery supply unit feeding a permanent magnet synchronous motor. Apart from the commonly present DC voltage sensor at converter's input, no additional sensors are required. As a first step, the DC supply system is modelled as a lumped parameter electric circuit. Further, a procedure for estimation of DC supply voltage based on inverter's current and open‐circuit battery voltage is proposed. A sliding mode observer is then used to obtain the actual value of open‐circuit battery voltage, required by the modelling algorithm. Consequently, an open‐circuit fault in a DC supply circuitry is determined based on the analysis of discrepancy between the estimated and measured DC supply voltage. Detection algorithm has been tested on a laboratory setup and its functionality is confirmed by experimental results.