Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Load control
Patent
1974-06-03
1977-11-01
Schaefer, Robert K.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Load control
318 99, H02P 700
Patent
active
040567591
ABSTRACT:
A driving system for moving paths or escalators which use an endles chain adapted to be circulated between a path for transporting passengers, comprising a first and a second sprocket disposed at one end portion and substantially middle portion of the path, respectively, a first and a second induction motor coupled respectively to the first and second sprockets and each having the same rating output the sum of which is selected to be substantially equal to a maximum capacity of the system, an induction coupling interposed between the second sprocket and the second induction motor, means for detecting a current flow through the first induction motor, means for setting a reference value, and a thyristor amplifier for exciting the induction coupling in response to an excess developed when an output of the detecting means exceeds the reference value.
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Kawauchi Kazuhiko
Mitsui Nobuo
Nakao Shoichi
Oohira Takeshi
Teranishi Katsuya
Ginsburg M.
Hitachi , Ltd.
Schaefer Robert K.
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