DocumentCode :
3212871
Title :
Induction Motor Temperature Estimation Based on High-Frequency Model of Rotor Bar
Author :
Cho, Kyung-Rae ; Seok, Jul-Ki
Author_Institution :
Sch. of Electr. Eng., Yeungnam Univ., Kyungsan
fYear :
2008
fDate :
5-9 Oct. 2008
Firstpage :
1
Lastpage :
7
Abstract :
This paper analyzes a high-frequency (HF) voltage injection-based rotor winding temperature estimation method for current-regulated squirrel-cage induction motors. We develop a theoretical HF model of the rotor bar and then first provide analysis of relevant HF model-based estimation aspects, such as dependency of the rotor leakage inductance on the temperature and the relationship between the rotor resistance and the rotor leakage inductance. The paper also includes an analysis of magnetic saturation to improve the estimation accuracy as well as analysis of the phase delay effect resulting from the drive which significantly affects the HF signal precision. Then, a specialized offline commissioning scheme is proposed to compensate the effect of the phase delay and the magnetic saturation. The estimation technique and sensitivity analysis are verified by means of experiments performed on an inverter-fed 1.5 kW induction motor.
Keywords :
squirrel cage motors; current-regulated squirrel-cage induction motors; high-frequency voltage injection; induction motor temperature estimation; inverter-fed induction motor; magnetic saturation analysis; phase delay; power 1.5 kW; rotor bar; rotor leakage inductance; rotor resistance; rotor winding temperature estimation method; sensitivity analysis; Delay effects; Hafnium; Inductance; Induction motors; Magnetic analysis; Rotors; Saturation magnetization; Signal analysis; Temperature; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Society Annual Meeting, 2008. IAS '08. IEEE
Conference_Location :
Edmonton, Alta.
ISSN :
0197-2618
Print_ISBN :
978-1-4244-2278-4
Electronic_ISBN :
0197-2618
Type :
conf
DOI :
10.1109/08IAS.2008.208
Filename :
4658996
Link To Document :
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