Method and device for setting the short circuit moment in electr

Details Method and device for setting the short circuit moment in electr Method and device for setting the short circuit moment in electr

1992-09-08

1994-09-13

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

36457101, G01R 3102

Patent

active

053472144

ABSTRACT:
A method and a device are proposed for setting the short circuit moment in electric motors, particularly in servomotors. for this purpose, the actual short circuit moment of the electric motor is measured and compared with a predetermined short circuit moment. Then the set short circuit current required to attain the desired moment is calculated. A predetermined value for the set short circuit current, which is a function of the calculated value, is then stored in an electronic control device for the electric motor. For this purpose, the device includes a memory in the control device for storing the predetermined set value. In this way it is possible in a simple and economical manner to equip even motors that are produced in manufacturing series and in which greater component tolerances exist, with a short circuit moment that lies within a narrow tolerance range.

REFERENCES:
patent: 4879671 (1989-11-01), Rieder et al.
patent: 4939678 (1990-07-01), Beckwith, Jr.
patent: 5018087 (1991-05-01), Dannenberg
"Die Prufung elektrischer Maschinen und die Untersuchung ihrer magnetischen Felder" (Testing Electrical Machines and Examination of their Magnetic Fields); W. Nurnberg, Springer-Verlag, Berlin, Heidelberg, New York; 1965; pp. 82, 83 (no month).

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