Method and apparatus for coordinating the speeds of motions

Details Method and apparatus for coordinating the speeds of motions Method and apparatus for coordinating the speeds of motions

1980-01-30

1981-12-29

Dobeck, B.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

318105, 318 80, H02P 550

Patent

active

043084893

ABSTRACT:
A method and apparatus for maintaining predetermined speed ratios between at least two motions are described. The speeds of the motive power sources for the motions are controlled by signals having values proportional to the ratio of those speeds, and in the alternative, if lower in value, reference signal which may be generated by an operator. The invention is described in connection with its application in a power shovel where it controls the ratio of crowd speed to hoist speed.

REFERENCES:
patent: 2744213 (1956-05-01), Jaeschke
patent: 3118097 (1978-12-01), Hettler
patent: 3199008 (1965-08-01), Stone
patent: 3598489 (1971-08-01), Thomas
patent: 3728596 (1973-04-01), Hermansson et al.
patent: 3833843 (1974-09-01), Bossons
patent: 4051415 (1977-09-01), Martin

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