Title :
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
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;
Conference_Titel :
Industry Applications Conference, 2007. 42nd IAS Annual Meeting. Conference Record of the 2007 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-1259-4
Electronic_ISBN :
0197-2618
DOI :
10.1109/07IAS.2007.307
