Multi-car elevator door control via motor feedback
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Solution Overview
Problem
In multi-elevator systems, the existing technology cannot shorten the open and close time of doors shared by multiple cars, as control parameters are not dynamically adjusted based on motor speed or current.
Innovation Solution
A multi-car elevator control device that adjusts the control parameters of one car's door based on the motor speed or current of another car, allowing for optimized door operation and reduced opening/closing time by using an open and close instruction judging part to update clearance distances and torque limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If control parameters of car doors are not dynamically adjusted, then system simplicity is maintained, but door open and close time cannot be shortened
Solution Approach 1:
The control device monitors motor speed or current of a specified car door and uses this feedback information to dynamically adjust control parameters of another car door. This feedback mechanism enables the system to optimize door operation timing without requiring complex manual intervention, thereby reducing door open and close time while maintaining manageable system complexity.
Solution Approach 2:
The invention changes control parameters (such as torque limits or speed profiles) of car door motors based on real-time motor speed or current measurements from other cars. By dynamically adjusting these parameters, the system optimizes door operation speed and timing, effectively shortening door open and close time without permanent structural modifications.
2Productivity
If control parameters are dynamically adjusted based on motor speed or current, then door open and close time is shortened, but control system complexity increases
Solution Approach 1:
The control device serves multiple functions: it monitors motor speed/current, determines optimal control parameters, and adjusts parameters for multiple car doors. This multi-functionality allows the system to improve productivity across all cars using a single integrated control mechanism, rather than requiring separate adjustment systems for each car, thereby limiting the increase in overall system complexity.
Solution Approach 2:
The control system automatically adjusts its own control parameters based on real-time motor measurements without requiring external intervention. This self-service capability enables dynamic optimization of door operation for improved productivity while avoiding the complexity of manual parameter adjustment mechanisms.
3Loss of time
If only open and close instructions are shared between cars, then system simplicity is maintained, but door operation optimization is limited
Solution Approach 1:
The control system transitions from static control (fixed open/close instructions) to dynamic control by continuously adjusting parameters based on real-time motor speed or current measurements. This dynamic adaptability allows the system to optimize door operation time for each specific operating condition, thereby reducing door operation time while enhancing control flexibility across different scenarios.
Data Source
AI summary
A multi-car elevator control device that can shorten an open and close time of a door is provided. The multi-car elevator control device includes, in an elevator system including a plurality of cars that overlap each other on a horizontal projection plane, an open and close instruction judging part that changes, based on a motor speed or current in a moving time of a car door of a specified car, a control parameter of a car door of another car. According to the configuration, the multi-car elevator control device changes, based on the motor speed or current in the moving time of the car door of the specified car, the control parameter of the car door of the other car, in the elevator system including a plurality of cars that overlap each other on the horizontal projection plane. Therefore, the open and close time of the door can be shortened.