Method of testing stepping motors

Details Method of testing stepping motors Method of testing stepping motors

1981-11-05

1983-12-20

Levy, Stewart J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

318331, 318490, 318696, G05B 1940

Patent

active

044220405

ABSTRACT:
A method for quickly testing stepping motors (10). The motor phases (.PHI.A-.PHI.C) are connected in series, and a constant current is applied to the phases. The rotor (12) of the motor (10) under test is rotated unidirectionally at a constant speed, and the voltage drop across each phase is measured and converted into back EMF. The back EMF is then analyzed to determine a characteristic of the motor (10), for example stepping accuracy of each of the phases, or related torque information, and the result of the analysis is then compared with a predetermined motor parameter to provide comparison data or a signal of a pass or fail condition based upon the comparison.

REFERENCES:
patent: 2568406 (1951-09-01), Packer et al.
patent: 3818297 (1974-06-01), Ha et al.
patent: 3942111 (1976-03-01), Pfouts
patent: 4292574 (1981-09-01), Sipin et al.
patent: 4330739 (1982-05-01), Chiang

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