Motor inspection method

Details Motor inspection method Motor inspection method

2007-12-18

2007-12-18

Nguyen, Ha Tran (Department: 2829)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

Reexamination Certificate

active

11306864

ABSTRACT:
A method of measuring the counter-electromotive force of the motor accurately is disclosed. The counter-electromotive force of the motor changes with the rotational position and the rotational speed. The value of the counter-electromotive force measured during the inertial rotation is a value associated the simultaneous change of the rotational position and the rotational speed and required to be corrected. The change rate of the rotational speed is set as a deceleration function, and the data are statistically processed using the measurement value of the counter-electromotive force at minuscule time intervals. In this way, the error elements are eliminated for each motor measured thereby to determine the corrected counter-electromotive force at a predetermined rotational speed. Even a miniature motor rapidly decreased in speed can be accurately measured within a short time.

REFERENCES:
patent: 4204425 (1980-05-01), Mallick, Jr.
patent: 4562390 (1985-12-01), Tobise
patent: 4991429 (1991-02-01), Stacey et al.
patent: 2003-228959 (2003-08-01), None
patent: 2004-264291 (2004-09-01), None
T. Kenjo, et al., “Brushless Motors,” Sogo Electronics Press, 2003, pp. 9-10.

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