Apparatus for controlling elevator door based on power source voltage
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTerumi Hirabayashi, Masamoto Mizuno, Masanori Tawada, Toshiyuki Kodera
Life of this patent
Estimating the term…
Abstract
An apparatus for controlling an elevator door based on controlling an electric motor for driving the door with a microcomputer and resetting the microcomputer when the power supply fails has a voltage monitor which detects the power source voltage and a braking circuit forcibly brakes the motor if the power source voltage detected by the voltage monitor is lower than a prescribed voltage. The motor is forcibly braked when the detected power source voltage is between the prescribed voltage and the lower limit of the range of voltages at which the microcomputer can operate.
Claims9
An apparatus for controlling an elevator door comprising:
- voltage monitor means for detecting a power source voltage for a resettable controller for an elevator door motor;
- and
- brake means for forcibly braking the motor controlled by the resettable controller if the power source voltage detected by said voltage monitor means is lower than an ordinary operating range of the power source voltage.
An apparatus for controlling an elevator door comprising:
- an electric motor for driving the door;
- power source means;
- control means for controlling electric power supplied from said power source means to said electric motor;
- control power source means for converting the voltage of said power source means into a voltage for operating said control means;
- reset means for resetting said control means when the output from said control power source means falls lower than a reset voltage;
- voltage monitor means for detecting the voltage of said power source means;
- and
- brake means for forcibly braking said motor if the voltage of said power source means detected by said voltage monitor means is lower than a an ordinary operating range of the power source voltage.
An apparatus for controlling a door of an elevator car comprising:
- an electric motor drivingly connected to a door of an elevator car to move the door between an open and a closed position;
- resettable control means for generating control commands for the motor;
- a power supply connected to the control means for supplying electric power to the control means;
- resetting means for resetting the control means when the voltage of the power supply falls below a reset voltage;
- voltage sensing means for sensing the voltage of the power supply;
- and
- braking means for braking the motor when the voltage sensed by the voltage sensing means falls below a braking voltage higher than the reset voltage.
Dependencies are inferred from the claim text.