BRAKE CONTROL DEVICE OF ELEVATOR

PROBLEM TO BE SOLVED: To suitably perform the braking operation of a body to be braked of the elevator.SOLUTION: A brake control microcomputer 20 puts switching elements 11a, 11b in the on state alternately for a fixed period so that part of the current carrying period of the switching element 11a o...

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Bibliographic Details
Main Author OTSUBO AKIRA
Format Patent
LanguageEnglish
Published 06.10.2011
Subjects
BLASTING
BRAKES
CLUTCHES
COUPLINGS FOR TRANSMITTING ROTATION
ELEVATORS
ENGINEERING ELEMENTS AND UNITS
ESCALATORS OR MOVING WALKWAYS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HAULING
HEATING
HOISTING
LIFTING
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
THERMAL INSULATION IN GENERAL
TRANSPORTING
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To suitably perform the braking operation of a body to be braked of the elevator.SOLUTION: A brake control microcomputer 20 puts switching elements 11a, 11b in the on state alternately for a fixed period so that part of the current carrying period of the switching element 11a overlaps the current carrying period of the switching element 11b and also the remaining part of the current carrying period of the switching element 11a does not overlap the current carrying period of the switching element 11b. In the timing when both the switching elements 11a, 11b are in the on state, brake coils 5a, 5b are energized, releasing the braking operation of a hoisting machine 13. When the braking operation of the hoisting machine 13 needs to be validated, the brake control microcomputer 20 puts the switching elements 11a, 11b in the off state, so that the brake coils 5a, 5b are not energized, validating the braking operation of the hoisting machine 13.
Bibliography:Application Number: JP20100064360