NDLI: A Remote and Sensorless Thermal Protection Scheme for Soft-Starter-Connected Induction Motors

Content Provider	IEEE Xplore Digital Library
Author	Pinjia Zhang Yi Du Bin Lu Habetler, T.G.
Copyright Year	2008
Description	Author affiliation: Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA (Pinjia Zhang; Yi Du)
Abstract	A non-intrusive stator winding resistance estimation technique is proposed for soft-starter-connected induction motors. By changing the gate drive signal of the thyristors in the soft-starter, a small dc bias can be intermittently injected to the motor. Based on continuous monitoring of the stator winding resistance, a new thermal monitoring scheme is proposed using only voltage, current, some motor nameplate information and the ambient temperature. An adaptive Kalman filter is designed to reduce the temperature estimation error via the dc injection. In addition, the influence of the cable resistance was investigated, and a compensation method is suggested. The requirements of the data acquisition system, such as sampling frequency and Analog to Digital conversion resolution, are also discussed. The proposed thermal monitoring scheme has been validated by experimental results under various load conditions. The importance of this new thermal monitoring scheme lies in its remote and sensorless nature.
Starting Page	1
Ending Page	7
File Size	425401
Page Count	7
File Format	PDF
ISBN	9781424422784
ISSN	01972618
DOI	10.1109/08IAS.2008.48
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-05
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thyristors Estimation error Induction motors Temperature Thermal resistance Stator windings Voltage DC motors Protection Remote monitoring
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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