Apparatus and method for determining whether motor lock...

Details Apparatus and method for determining whether motor lock... Apparatus and method for determining whether motor lock...

2007-05-29

2007-05-29

Nguyen, Vinh P. (Department: 2829)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

Reexamination Certificate

active

11034825

ABSTRACT:
An apparatus and method for determining the presence or absence in a motor lock error in a sensorless motor. The method includes the steps of: driving the sensorless motor; determining whether or not a predetermined time elapses after the sensorless motor has been driven; measuring a current applied to the sensorless motor after the lapse of the predetermined time; calculating a difference between the measured current with a predetermined reference current; and determining the presence or absence of a motor lock error in the sensorless motor by determining whether the determined difference is equal to or higher than a predetermined reference difference, so that it quickly determines the presence or absence of a motor lock error in the sensorless motor without using a sensor and prevents an overcurrent from flowing in the sensorless motor, resulting in the prevention of a faulty operation or damage to the sensorless motor.

REFERENCES:
patent: 5463298 (1995-10-01), Kamio et al.
patent: 6333617 (2001-12-01), Itabashi et al.
patent: 6639374 (2003-10-01), Shimoyama
patent: 6870344 (2005-03-01), Jinbo
patent: 10-2003-0012415 (2003-02-01), None

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