Elevator motor control

Details Elevator motor control Elevator motor control

1984-12-10

1987-06-09

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Dynamic braking

318381, 318370, 363 37, 187120, H02P 314, B66B 132

Patent

active

046722777

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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