Split MRL Elevator Control Assembly for Reduced Wiring Access
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Solution Overview
Problem
Existing elevator control systems face challenges in reducing architectural space requirements and installation complexity while maintaining functional integration and reducing failure incidence and costs.
Innovation Solution
The control system is split into two assemblies, one outside and one inside the elevator shaft, with the first assembly containing power switches, safety units, communication units, and bypass devices, and the second assembly comprising power supply, monitoring, and drive control units, allowing for increased integration and reduced wiring, space, and installation costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control system components are placed inside the elevator shaft, then the degree of integration increases and wiring complexity is reduced, but maintenance accessibility becomes more difficult
Solution Approach 1:
The control system is divided into two separate assemblies: a first assembly placed outside the shaft containing maintenance-friendly components (power switch, light switch, safety unit, communication unit, bypass device), and a second assembly placed inside the shaft containing control components (power supply, monitoring system, drive control unit, processor). This segmentation allows each assembly to be optimized for its specific location while maintaining overall system integration.
2Ease of repair
If the controller is installed on the top floor next to the landing doors, then maintenance accessibility is improved, but the length of power cables increases
Solution Approach 1:
The control system is segmented into two assemblies placed close to each other within the shaft area. The first assembly outside the shaft and the second assembly inside the shaft are connected by minimal wiring, significantly reducing power cable length compared to traditional top-floor installation while maintaining maintenance accessibility through the external first assembly.
3Area of stationary object
If more components are integrated inside the shaft, then architectural space is saved, but installation complexity increases
Solution Approach 1:
The control system components are segmented into two functional assemblies that can be independently installed and configured. The first assembly with standard electrical components is installed outside the shaft, while the second assembly with control electronics is installed inside the shaft near the motor. This segmentation reduces overall architectural space requirements while keeping installation complexity manageable through modular assembly installation.
4Device complexity
If the control system is split into two assemblies, then the degree of integration increases and wiring is reduced, but system reliability may be affected by increased connection points
Solution Approach 1:
The control system is segmented into two assemblies connected through defined communication and power interfaces. The first assembly outside the shaft and second assembly inside the shaft are connected with minimal wiring harnesses, reducing the number of connection points and potential failure sources compared to traditional distributed installations, while maintaining system reliability through robust interface design.
Data Source
AI summary
A control system for an elevator is separated into a first assembly allocated outside and a second assembly allocated inside an elevator shaft. The first assembly includes a power switch for turning on/off the control system, a light switch for switching a light inside the shaft, a safety unit for protecting electrical safety of the control system, a communication unit for data communication with the elevator and/or an external communication device, and a bypass device for bypassing a safety chain of the elevator. The second assembly includes a power supply system for driving the elevator and/or for the safety chain, a monitoring system for monitoring the safety chain, a drive control unit for a drive motor, and a processor for data processing of the control system. The first assembly and the second assembly can communicate with each other and be connected respectively as segments into the safety chain.