Elevator Backup Circuit for Overspeed Governor Power Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electronic overspeed governors face challenges in ensuring reliable electricity supply during network malfunctions, leading to unpredictable emergency rescue situations due to the unpredictability of backup battery duration and potential failure to free trapped passengers.
Innovation Solution
A backup circuit with a controllable switch and energy storage that disconnects and reconnects electricity supply to the overspeed governor based on monitored elevator movement, allowing for a controlled emergency drive and indicating the energy storage's state of charge, enabling smaller and more reliable energy storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backup battery with sufficient charge capacity is used to ensure electricity supply during power outages, then the overspeed governor can operate during emergencies, but the battery may empty before rescue personnel arrive, leaving no indication of the operating condition
Solution Approach 1:
The patent uses color-coded LED indicators (green, yellow, red) to visually represent the charge state of the backup battery and operational status of the overspeed governor. This allows rescue personnel to immediately assess the operating condition without needing to interpret complex electrical signals or wait for system responses.
2Reliability
If the backup battery remains connected during prolonged power outages, then the overspeed governor can be monitored, but the battery charge depletes, making it impossible to free trapped passengers if the outage continues
Solution Approach 1:
The system dynamically adjusts the connection state of the backup battery to the overspeed governor based on power outage duration and charge level. The control unit monitors battery charge and automatically disconnects the backup battery when charge falls below a threshold, preventing complete depletion while maintaining monitoring capability when charge is sufficient.
Solution Approach 2:
The system performs preliminary disconnection of the backup battery before complete charge depletion occurs. By monitoring charge levels and disconnecting in advance when charge falls below a predetermined threshold, the system ensures that some charge remains available for emergency operations while preventing futile monitoring attempts during extended outages.
3Quantity of substance
If the electricity supply is immediately disconnected during a power outage, then the backup battery charge is preserved, but the overspeed governor may malfunction and activate the gripping function, preventing elevator movement
Solution Approach 1:
The system implements a delayed disconnection strategy where the backup battery remains connected for a predetermined time period after power outage detection. This preliminary maintenance of connection ensures the overspeed governor continues to receive power and operate reliably during the initial critical phase, while the control unit monitors charge levels to disconnect before complete depletion.
Solution Approach 2:
The system provides a time buffer by maintaining backup battery connection during the initial power outage period. This cushioning period allows the overspeed governor to complete its monitoring function and prevents premature disconnection that would cause malfunction, while the control unit ensures disconnection occurs before charge depletion.
4Duration of action of stationary object
If a large capacity backup battery is used to ensure operation throughout extended power outages, then continuous monitoring is possible, but the system complexity and cost increase
Solution Approach 1:
Instead of providing continuous power supply throughout extended outages, the system uses a smaller backup battery that provides power for a limited initial period. The control unit intelligently manages the connection state, disconnecting when charge falls below a threshold, which prevents complete depletion while avoiding the need for a large capacity battery designed for indefinite operation.
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
Ensures fail-safe operation and efficient rescue operations by maintaining energy storage charge independently of malfunction duration, allowing for timely and reliable emergency response without futile attempts to move the elevator.
Implementation Method 1
an energy storage for supplying electricity to the overspeed governor
Implementation Method 2
The backup circuit for electricity supply preferably comprises a controllable switch for disconnecting the electricity supply occurring from the energy storage to the overspeed governor and/or for restarting said electricity supply
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a backup circuit (1) for electricity supply for ensuring the electricity supply of an electronic overspeed governor (3) in connection with a malfunction of the electricity supply. The backup circuit (1) for electricity supply comprises an energy storage (2). The backup circuit (1) for electricity supply is configured to disconnect the electricity supply from the energy storage (2) ensuring the electricity supply of the electronic overspeed-governor (3) to the overspeed governor (3) when the malfunction of the electricity supply continues.