Ropeless Elevator Out-of-Group Mode Control
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Solution Overview
Problem
Existing elevator systems face challenges in efficiently managing multiple elevator cars in a ropeless configuration, particularly in high-rise buildings where traditional rope systems are prohibitive, and there is a need for flexible operation modes to handle various service demands and specialized functions.
Innovation Solution
A ropeless elevator system with a linear propulsion system and a controller that operates in in-group, out-of-group, and transition modes, allowing for authorized user-initiated transitions between these modes to manage service demands and specialized operations, including passenger calls, maintenance, and emergency responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple elevator cars operate in a single lane without group service mode, then operational flexibility and specialized functions (maintenance, emergency) are improved, but traffic flow efficiency and service reliability deteriorate due to interference with regular passenger calls
Solution Approach 1:
The system dynamically switches between in-group mode and out-of-group mode based on operational requirements. The controller programmed to transition cars between modes allows the system to adapt its behavior - when specialized functions are needed, a car can be taken out of group service, and when normal operation is required, all cars operate in coordinated group service. This dynamic switching resolves the contradiction by allowing both specialized operations and efficient traffic flow at different times.
2Adaptability or versatility
If a car is taken out of group service for specialized operations, then ability to perform maintenance and emergency functions is improved, but service reliability and passenger call response deteriorate
Solution Approach 1:
The system provides preliminary notification to passengers before a car is taken out of group service. The controller programmed to notify passengers of upcoming mode transitions allows them to exit the car before it leaves group service mode. This preliminary action ensures that passengers are not stranded, maintaining service reliability while enabling specialized operations.
3Adaptability or versatility
If transition between in-group and out-of-group modes is implemented, then operational versatility is improved, but system complexity and control difficulty increase
Solution Approach 1:
The controller automatically manages the transition between in-group and out-of-group modes based on received requests and system state. Rather than requiring complex manual coordination, the controller programmed to autonomously handle mode transitions, passenger notifications, and car reassignment. This self-service approach to mode management reduces control complexity while maintaining operational versatility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and flexible operation of multiple elevator cars in a ropeless system, enhancing service reliability and safety by allowing for designated out-of-group operations without interfering with regular traffic demands, while ensuring seamless transitions and optimized traffic flow.
Implementation Method 1
a propulsion system to impart force to each elevator car of the plurality of elevator cars; wherein the propulsion system is a linear propulsion system comprising a primary portion mounted in the hoistway
Data Source
AI summary
A ropeless elevator system includes a plurality of elevator cars configured to travel in a hoistway having at least one lane, a propulsion system to impart force to each elevator car of the plurality of elevator cars, and a controller. The controller is programmed to operate in an in-group mode where the plurality of elevator cars perform service demands, an out-of-group mode where at least one selected elevator car of the plurality of elevator cars is prevented from performing the group service mode service demands, and a transition mode where the at least one selected elevator car is prepared and transitioned from operation in the in-group mode to operation in the out-of-group mode.