Mitsubishi Denki Kabushiki Kaisha

Masahide Okumura

Shigemi Iwata

Hiroyuki Ikejima

An elevator adjusting apparatus for adjusting a brake torque produced by a brake for braking travel of an elevator cage includes a brake torque adjustment mode setting unit for setting an adjustment mode for the brake torque, a cage position recognizing unit for recognizing a cage position, a cage speed detecting unit for detecting a cage speed, a brake actuation command generating unit for reissuing a brake actuation command generating unit for issuing a brake actuation command when the brake torque adjustment mode is set by the brake torque adjustment mode setting unit and the cage position recognizing unit recognizes that the cage position has reached a predetermined position of a lift passage, a brake control unit for actuating the brake in response to the brake actuation command issued from the brake actuation command generating unit, and a brake torque calculating unit for calculating the brake torque based on the cage speed detected by the cage speed detecting unit during the brake actuation. With the apparatus, the brake torque can be adjusted simply accurately and efficiently without using any weights.

Apparatus to automatically adjust spring tension of an elevator brake to

An elevator control apparatus which compensates for an insufficient gain of the entire control system caused by a drop in power source voltage or the like includes an electric power control circuit for controlling electric power for feeding to an electric motor which drives the car of an elevator, a speed command generating circuit for generating a speed command signal of the car, a speed detecting circuit for detecting the speed of the car, a computing circuit for calculating the deviation between a speed detecting signal obtained by the speed detecting device and a speed command signal generated by the speed command generating circuit, a compensating circuit for outputting an electric power command signal in which gain properties and phase properties have been compensated in accordance with the deviation calculated by the computing circuit, a comparing circuit for determining whether or not the deviation calculated by the computing circuit exceeds a first specified value, and a damping gain setting circuit for, when the comparing circuit determines that the deviation exceeds the first specified value, adding a correction value which is based on the deviation to the electric power command signal from the compensating circuit in order to output the added correction value as an electric power control signal to the electric power control circuit.

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Inazawa, Japan

Masahide Okumura