NDLI: An active stator temperature estimation technique for thermal protection of inverter-fed induction motors with considerations of impaired cooling detection

Content Provider	IEEE Xplore Digital Library
Author	Pinjia Zhang Bin Lu Habetler, T.G.
Copyright Year	2009
Description	Author affiliation: Eaton Corporation - Innovation Center, 4201 North 27th Street, Milwaukee, WI 53216, USA (Bin Lu) \|\| School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, 30332, USA (Pinjia Zhang; Habetler, T.G.)
Abstract	Thermal protection is one of the most important aspects of any motor control system. This paper proposes a stator winding temperature estimation method for the thermal protection of inverter-fed electric motors. By modifying the space vector pulse width modulation (SVPWM) in an open-loop motor drive, a dc voltage can be intermittently injected into the motor. The stator temperature can be estimated by measuring only the dc component of the phase current under both constant and variable load conditions. The evaluation of the resultant torque pulsation and the compensation for serial resistances are also discussed. The proposed stator temperature estimation method is validated from experimental results under variable load conditions and both healthy and impaired cooling conditions. The error in the stator temperature estimation is within 8°C under different operating conditions. The significance of this method lies in its non-intrusive nature: only current sensors are required for implementation; the normal operation of the motor is not interrupted.
Starting Page	1326
Ending Page	1332
File Size	911912
Page Count	7
File Format	PDF
ISBN	9781424442515
DOI	10.1109/IEMDC.2009.5075375
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protection Induction motors Cooling Motor drives Space vector pulse width modulation Temperature sensors Stator windings Electric motors Voltage DC motors temperature estimation induction motor protection motor drives thermal protection signal injection stator resistance estimation
Content Type	Text
Resource Type	Article

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