Phase-loss detection for rotating field machine

Details Phase-loss detection for rotating field machine Phase-loss detection for rotating field machine

2007-01-09

2007-01-09

Hollington, Jermele (Department: 2829)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

Reexamination Certificate

active

11063450

ABSTRACT:
A method for detecting a loss of a phase in a multiphase rotating field machine, the method comprising providing a first electrical current into the machine windings to cause the current vector to assume a first current vector position, sensing a first current in at least one selected phase winding of the machine, comparing the sensed first current in the at least one selected phase winding with a first calculated current for the selected phase winding, and detecting that a first phase fault has occurred if the first calculated and sensed first currents differ by more than a predetermined value.

REFERENCES:
patent: 4354216 (1982-10-01), Volta
patent: 4544982 (1985-10-01), Boothman et al.
patent: 4710692 (1987-12-01), Libert et al.
patent: 4796142 (1989-01-01), Libert
patent: 4912390 (1990-03-01), Curran et al.

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