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Electromagnetic brake real-time state monitoring and early warning method and device

An electromagnetic brake, monitoring and early warning technology, applied to electromagnetic measuring devices, measuring devices, and electric devices, etc., can solve the problems of low reliability of monitoring devices, inability to quantitatively monitor the action distance of electromagnetic brakes, and inability to work reliably with micro switches. , to achieve the effect of improving reliability

Pending Publication Date: 2021-12-31
LIAONING YOULIAN ELECTROMECHANICAL EQUIP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current common monitoring method is to set a micro switch at the position of the armature, which can only realize the monitoring of the action state of the armature, but cannot provide quantitative monitoring of the air gap position and action distance of the electromagnetic brake. At the same time, due to the small stroke of the armature, it generally does not exceed 0.5mm , or even smaller, does not make the micro switch work reliably, so the reliability of the monitoring device using the micro switch is not high

Method used

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  • Electromagnetic brake real-time state monitoring and early warning method and device
  • Electromagnetic brake real-time state monitoring and early warning method and device
  • Electromagnetic brake real-time state monitoring and early warning method and device

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Embodiment Construction

[0022] The real-time state monitoring and early warning method of the electromagnetic brake of the present invention is:

[0023] Step 1: Measure the coil current i and voltage U.

[0024] When the brake resistance R is 3.3 ohms, the brake structure coefficient K=0.4462e-003, and the initial air gap is X 0+ =0.68e-003, when the applied power supply voltage is 12V (the measured voltage U collected in real time is the measured value of the applied voltage), the waveform of the electromagnetic brake coil current i recorded by the monitoring device is shown in figure 1 .

[0025] Step 2: Calculate the coil inductance L, specifically, the equivalent circuit of the electromagnetic brake is an RL series circuit, and the differential equation satisfied by this circuit is:

[0026] U=L·di / dt+iR (1)

[0027] Formula (1) The resistance R is a fixed value for a type of brake, which can be obtained after measurement,

[0028] By formula (1) get

[0029] L=(U-iR) / (di / dt) (2),

[0030]...

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Abstract

The invention provides a real-time state monitoring and early warning method and device for an electromagnetic brake. The method is characterized in that firstly, a current sampling module and a voltage sampling module measure the current i and the voltage U of a coil respectively; secondly, an MCU component calculates coil inductance L according to a differential equation of the RL series circuit; deltaX is calculated according to the relation between an air gap of the brake and the inductance L; and finally, the MCU component transmits the data to an upper computer control system through a monitoring and early warning output module. The method and the device have the positive effects that the air gap position and the action distance of the electromagnetic brake are quantitatively monitored, and even if the stroke of the armature is small, quantitative monitoring and real-time giving can be realized, and the reliability is remarkably improved.

Description

technical field [0001] The invention relates to an electromagnetic brake, in particular to an electromagnetic brake real-time state monitoring and early warning device and method. Background technique [0002] Electromagnetic brake is an extremely important safety protection device for the operation of hoisting equipment (including elevators). An electromagnetic brake consists of an armature, a stator and a coil. Electromagnetic brakes without monitoring and early warning devices are connected with the control system of the host computer by coil lines. The action stroke of the armature, that is, the distance between the armature and the stator, is called the air gap ⊿X. When the coil is energized, the armature is attracted by the electromagnetic force and the stator is engaged, and ⊿X=0 after the brake is engaged; when the coil is powered off, the armature is reset by the action of the spring, and the brake is released to brake. At this time, ⊿X is the largest. The size o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/14G01B7/00
CPCG01B7/14G01B7/003
Inventor 张伟张安戈于长广吴辉吕文彩
Owner LIAONING YOULIAN ELECTROMECHANICAL EQUIP
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