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Condition monitoring of vertical transport equipment

A technology of vertical transmission and equipment, applied in the field of working conditions of mechanical brakes, it can solve problems such as complex and erroneous operation of the system, and achieve the effect of simplifying diagnosis

Active Publication Date: 2015-09-16
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such additional dedicated sensors complicate the system and are thus susceptible to erroneous operation

Method used

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  • Condition monitoring of vertical transport equipment
  • Condition monitoring of vertical transport equipment
  • Condition monitoring of vertical transport equipment

Examples

Experimental program
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Embodiment Construction

[0018] Many frequency converters enable mechanical brakes that can be used to brake the mechanical motion associated with the load of the frequency converter to be controlled. Frequency converters are used in elevators or other vertical transport equipment, and the frequency converter controls the movement of the load, ie the elevator car in the hoistway or the load of the crane. The drive is also able to control a mechanical brake to hold the load safely in place after the load has come to a standstill. Under normal operation, the frequency converter first controls the elevator car to the desired position based on the position information, and after reaching the desired position and after the elevator car stops moving, the frequency converter sends a command to the mechanical brake so that the brake is firmly fixed shaft of the rotor. With respect to a crane or lifting appliance, the stop position does not need to be predetermined so that when the crane user decides to stop ...

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PUM

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Abstract

A method and arrangement for detecting a working condition of a mechanical brake of vertical transport equipment, the vertical transport equipment comprising a frequency converter, an electrical motor and a mechanical brake. In the method, movement of the vertical transport equipment being controlled using the frequency converter that is adapted to feed electrical power to a motor and the mechanical brake is adapted to mechanically hold a car or load of the vertical transport equipment when said car or load is stationary. The method comprises storing data relating to deceleration of the car or load for use as reference data, controlling the mechanical brake into a closed position for decelerating movement of the car or load, determining test data relating to the deceleration of the car or load from measured information or from a control system of the frequency converter, comparing the reference data with the test data, and producing an alarm signal on the basis of the comparison between the reference data and the test data.

Description

technical field [0001] This invention relates to monitoring the condition of vertical conveyance equipment and in particular to determining the operating condition of the mechanical brakes of elevators. Background technique [0002] Vertical transfer equipment such as lifts or elevators are intended for moving goods or people eg between floors of a building, between decks of a ship. Similarly, a crane or similar lifting device is used to transfer goods from one location to another by raising and lowering the goods and possibly also moving them horizontally. [0003] Modern elevators and similar lifting devices are equipped with electric motors driven by frequency converters. As we all know, frequency converters are devices that can be used to control electric motors. The frequency converter outputs a voltage with variable frequency to the controlled motor. The frequency of the voltage can be set to a desired frequency so that the motor rotates at the desired frequency. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/02
CPCB66B1/32B66B5/0018B66B5/0031
Inventor 马蒂·穆斯托宁
Owner ABB (SCHWEIZ) AG
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