Measuring and testing – Instrument proving or calibrating – Speed – velocity – or acceleration
Patent
1997-01-07
1998-11-17
Raevis, Robert
Measuring and testing
Instrument proving or calibrating
Speed, velocity, or acceleration
G01L 500
Patent
active
058378790
ABSTRACT:
Methods and apparatus for automated testing of centrifugal start mechanisms for electric motors are described. In one embodiment, the system includes a stepper motor and an adapter secured to the stepper motor shaft. The adapter includes a shaft sized to have a diameter about equal to the diameter of a rotor shaft which carries the start mechanisms to be tested. The system also includes a fiber optic sensor having an optical signal transmitter and an optical signal receiver. The transmitter and receiver, in operation, are substantially aligned on opposing sides of a start mechanism secured to the adapter. When the push collar of a centrifugal start mechanism moves (e.g., at the cutout and cutback speeds), such movement is detected by the sensor. The system further includes a control computer coupled to a programmable motion controller. The motion controller is coupled to a stepper motor drive which is coupled to, and controls, the stepper motor so that the motor shaft accelerates and decelerates at a rapid but fixed rate.
REFERENCES:
patent: 1805192 (1931-05-01), Smith
patent: 5377082 (1994-12-01), Fisher et al.
patent: 5388467 (1995-02-01), Jereb et al.
General Electric Company
Mora Enrique J.
Raevis Robert
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