Elevator Brake Phase Control Device
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Solution Overview
Problem
Elevator brake control devices using contactors generate noise during switching and require additional components for redundant designs, which can be unsafe and inefficient.
Innovation Solution
Incorporating phase control devices with electronic switch-off elements in the rectifier branches of elevator brake control devices, allowing for redundant switching without contactors, reducing noise and enabling safer disconnection of brake connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contactors are used to control brake magnets, then switching functions can be monitored safely, but switching noise is generated and device complexity increases
Solution Approach 1:
The patent replaces mechanical contactors with electronic phase control devices (thyristors) to eliminate mechanical switching noise. The electronic switching elements provide silent operation while maintaining the ability to control brake magnets, directly resolving the noise issue while preserving safety monitoring capabilities through electronic control circuits.
Solution Approach 2:
The patent introduces electronic phase control devices as intermediary elements between the power supply and brake magnets. These phase control devices serve as mediators that provide safe monitoring functions and electronic switching without generating mechanical noise, thus resolving the contradiction between safety monitoring and noise reduction.
2Reliability
If contactors are used for brake control, then switching functions are simple to monitor, but additional components are required increasing device complexity
Solution Approach 1:
The patent merges the functions of contactors and phase control into a single electronic phase control device. This integration eliminates the need for separate mechanical contactors while maintaining safety monitoring capabilities through the electronic control circuit, thereby reducing device complexity while preserving reliability.
Solution Approach 2:
The electronic phase control device performs multiple functions: it provides safe monitoring of switching functions, controls the brake magnets, and eliminates the need for additional mechanical components. This multi-functionality reduces overall device complexity while maintaining reliability.
3Object-generated harmful factors
If phase control devices are used instead of contactors, then switching noise is reduced, but redundant electronic switch-off elements are needed for safety
Solution Approach 1:
The patent replaces mechanical contactors with electronic phase control devices, eliminating mechanical switching noise. The electronic switch-off elements (thyristors) provide silent operation while maintaining safety functions, directly resolving the noise issue without significantly increasing complexity.
Solution Approach 2:
The patent uses electronic switch-off elements that can be easily replaced if needed, providing a cost-effective solution for redundant safety switching. These electronic components offer reliable fail-safe functionality without the complexity and noise associated with mechanical contactors.
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
This solution reduces or eliminates switching noise, enhances safety through redundant electronic disconnection, and optimizes energy consumption by controlling voltage levels for efficient brake operation.
Implementation Method 1
the rectifier device is used to convert the supply voltage at the supply connection, which is typically present as an AC voltage, into a (pulsed) DC voltage
Implementation Method 2
a phase control device is arranged in each of the first branches and that at least one electronic switch-off element is formed, with which at least one of the two brake connections can be switched off
Implementation Method 3
two brake magnets of the elevator brake are each supplied with current from a supply connection via a rectifier device each with a first branch
Data Source
Figure 1~2
Figure 3~4
AI summary
In an elevator brake control device (1) it is proposed to supply a supply voltage from a supply connection (2) via at least one rectifier device (3, 4) with rectifier elements (9, 10, 11, 12) to at least one brake connection (13, 14), wherein in at least two branches (5, 6, 7, 8) of the at least one rectifier device (3, 4) a phase control device (22) is arranged, with which an effective voltage level at the at least one brake connection (13, 14) can be reduced.