Method for estimating the sum of stator and rotor resistances

Details Method for estimating the sum of stator and rotor resistances Method for estimating the sum of stator and rotor resistances

2007-08-28

2007-08-28

Duda, Rina (Department: 2837)

Electricity: motive power systems

Induction motor systems

C318S807000, C318S812000

Reexamination Certificate

active

11408030

ABSTRACT:
A method for estimating the sum of the stator and rotor resistances of an induction machine using a frequency converter when the frequency converter is connected to the induction machine. The method comprises the steps of controlling the stator current of the induction machine with the frequency converter such that the rotor flux (ψR) changes substantially linearly while the stator current is substantially constant, determining the magnitude of stator voltage and stator current while the rotor flux is changing substantially linearly, and calculating the sum of the stator and rotor resistances from the determined magnitudes of stator voltage and stator current.

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patent: 6636012 (2003-10-01), Royak et al.
patent: 2003/0155885 (2003-08-01), Zaremba et al.
patent: 2005/0029983 (2005-02-01), Mijalkovic et al.
patent: 0 704 709 (1996-04-01), None
patent: 0 924 852 (1999-06-01), None
Collins E R Jr et al: “Improved methods for determining the equivalent circuit parameters for single-phase induction motor models” pp. 390-397 Oct. 2, 1993.
Chen TC et al: “Measurement of induction 1 motor parameter identification” pp. 288-291, vol. Conf. 8 May 14, 1991.

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