To provide a brake failure sign diagnostic device capable of previously notifying of an abnormality in operation of an armature before resulting in a failure.SOLUTION: The brake failure sign diagnostic device includes: a brake disk; an armature; a spring for sliding the armature to the side of the brake disk to press it against the brake disk; an electromagnetic coil for separating the armature from the brake disk against bias force of the spring; a control part for de-energizing the electromagnetic coil when braking and energizing the electromagnetic coil when canceling the braking; a detection part for dividing the change in current flowing through the electromagnetic coil into a current increase component based on a time constant of the electromagnetic coil and a current variation component based on a counterelectromotive voltage caused by slide resistance between a friction factor on a rotation shaft and the armature; and a current sensor for detecting the current variation component based on the counterelectromotive voltage. The brake failure sign diagnostic device observes the sliding abnormality of the armature from the detection of the current sensor.SELECTED DRAWING: Figure 5
【課題】アマーチュアの動きの異常について、故障に至る前に知らせることができるブレーキ故障予兆診断装置を提供する。【解決手段】ブレーキ故障予兆診断装置は、ブレーキディスクと、アマーチュアと、アマーチュアをブレーキディスク側に摺動させてブレーキディスクに押し当てるスプリングと、アマーチュアをスプリングの偏倚力に抗してブレーキディスクから引き離す電磁コイルと、制動をかける場合には電磁コイルを消勢し、制動を解除する場合には電磁コイルを付勢する制御部と、電磁コイルに流れる電流の変化を、電磁コイルの時定数に基づく電流増加成分と、回転軸上の摩擦因子とアマーチュアとの摺動抵抗に起因する逆起電圧に基づく電流変動成分とに分ける検出部と、逆起電圧に基づく電流変動成分を検知する電流センサと、を具備し、電流センサの検知からアマーチュアの摺動異常を観測するブレーキ故障予兆診断装置。【選択図】図5
BRAKE FAILURE SIGN DIAGNOSTIC DEVICE
ブレーキ故障予兆診断装置
2018-12-20
Patent
Electronic Resource
Japanese
IPC: | B66B Aufzüge , ELEVATORS |
FAILURE SIGN DIAGNOSTIC DEVICE AND FAILURE SIGN DIAGNOSTIC METHOD
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