Temperature Estimation in Inverter Fed Machines Using High Frequency Carrier Signal Injection

Author

Briz, Fernando ; Degner, Michael W. ; Guerrero, Juan M. ; Diez, Alberto B.

Author_Institution

Univ. of Oviedo, Gijon

fYear

2007

Firstpage

2030

Lastpage

2037

Abstract

Temperature monitoring using the injection of a high frequency, carrier signal voltage is proposed in this paper. The carrier signal voltage is used to estimate the transient impedance of the system, which is a function of the stator transient resistance, and therefore, the windings´ temperature. The variation of the stator transient impedance´s phase angle is used to track the temperature of the stator windings. The method can be implemented in standard, inverter-fed drives with no additional hardware, minimal computational requirements, and practically no interference with the regular operation of the drive.

Keywords

asynchronous machines; electric drives; electric impedance measurement; parameter estimation; stators; carrier signal injection; inverter fed machine drives; stator transient impedance; stator transient resistance; temperature estimation; temperature monitoring; Frequency estimation; Hardware; Impedance; Inverters; Signal processing; Stator windings; Temperature sensors; Thermal resistance; Torque; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2007. 42nd IAS Annual Meeting. Conference Record of the 2007 IEEE

Conference_Location

New Orleans, LA

ISSN

0197-2618

Print_ISBN

978-1-4244-1259-4

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/07IAS.2007.307

Filename

4348056