B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
364/33
B66B 1/24 (2006.01) B66B 1/30 (2006.01) B66B 11/04 (2006.01) B66D 1/12 (2006.01) H02P 5/747 (2006.01)
Patent
CA 1221479
ABSTRACT OF THE DISCLOSURE An elevator driving device comprises a sheave on which a main cable for suspending an elevator cage is wound. A plurality of electric motors are provided for driving the sheave through speed reduction mechanisms and control circuitry is provided for allowing motors to operate simultaneously in a parallel mode or individually. When the control circuitry energizes the motors simul- taneously to permit the motors to operate in parallel mode, increasing or decreasing the number of electric motors can provide an output which is in agreement with the specifi- cations for the particular elevator.
420204
Anzai Nobuo
Yokota Satoru
Mitsubishi Denki Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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