Motor control device

Details Motor control device Motor control device

2007-04-03

2010-10-05

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S779000, C318S721000

Reexamination Certificate

active

07808203

ABSTRACT:
A motor control device that includes a first speed estimator estimating the rotation speed of the rotor of a permanent-magnet synchronous motor and that controls the motor so that a first estimated rotation speed estimated by the first speed estimator follows the specified speed value further includes a second speed estimator that estimates the rotation speed of the rotor by an estimation method different from that used by the first speed estimator. The motor control device detects synchronization failure based on a comparison between a second estimated rotation speed estimated by the second speed estimator and the first estimated rotation speed or the specified speed value.

REFERENCES:
patent: 5701066 (1997-12-01), Matsuura et al.
patent: 5952808 (1999-09-01), Umeji
patent: 11-018499 (1999-01-01), None
patent: 2001-025282 (2001-01-01), None
patent: 2002-058281 (2002-02-01), None
patent: 2004-064902 (2004-02-01), None
patent: 2005-176458 (2005-06-01), None

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