Apparatus for correcting current value of three-phase...

Details Apparatus for correcting current value of three-phase... Apparatus for correcting current value of three-phase...

2006-10-24

2006-10-24

Masih, Karen (Department: 2837)

Electricity: motive power systems

Positional servo systems

With compensating features

C318S810000, C318S254100, C318S132000, C318S434000, C318S803000

Reexamination Certificate

active

07126305

ABSTRACT:
An apparatus corrects a current value of a three-phase electric motor including a current detector that detects current of each of three phases including a first phase, a second phase, and a third phase. The apparatus includes a current-value correcting unit. When current of one of the first to third phase is zero-crossing, the current-value correcting unit corrects a current value of at least one of the others of the first to third phases on a basis of a correlation between detection values of the current detectors provided for the others of the first to third phases during a period in which the three-phase electric motor is operating.

REFERENCES:
patent: 6215426 (2001-04-01), Taniguchi et al.
patent: 1 215 503 (2002-06-01), None
patent: 1 359 663 (2003-11-01), None
patent: A-05-091780 (1993-04-01), None
patent: A09-011918 (1997-01-01), None
patent: A 2003-333882 (2003-11-01), None

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