Variable load motor drive control

Details Variable load motor drive control Variable load motor drive control

1989-10-27

1990-10-16

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318432, 318 7, 318 6, 360 73060, 388819, H02P 516, G05B 1128

Patent

active

049638106

ABSTRACT:
The invention relates to a method and apparatus for making low inertia motors useful under circumstances where the load exerting drag on the motor during start-up acceleration may be different from time to time. A ramped drive current as opposed to a conventional constant current limit signal is applied to the motor. The invention is particularly useful, for example, in magnetic tape drives which must adapt to variations in drag between one tape cassette or cartridge and another.

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