Elevator motor control
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United States of America Patent
Stats
-
Jun 9, 1987
Grant Date -
N/A
app pub date -
Dec 10, 1984
filing date -
Dec 10, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for controlling a direct current motor of an elevator during emergency braking by conducting a current generated by the motor through a braking resistor are disclosed, in which a semiconductor switch connects the braking resistor across the motor during the emergency braking and a mains voltage to the motor is simultaneously interrupted.
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