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Digitalized comprehensive motor protector

A technology of integrated protectors and motors, which is applied in the direction of automatic disconnection emergency protection devices, emergency protection circuit devices, electrical components, etc., to prevent heavy objects from falling from high altitudes, ensure production efficiency, and protect life safety.

Active Publication Date: 2014-06-25
大连美恒时代科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Looking at domestic and foreign motor protection devices, there is no motor protector that can fully meet the requirements of such inspection methods and national standards.

Method used

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  • Digitalized comprehensive motor protector
  • Digitalized comprehensive motor protector

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Experimental program
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Embodiment Construction

[0021] The motor comprehensive protector such as figure 1 The shown includes: a power module that provides electric energy for the entire protector; a motor running signal detection circuit that detects the motor running state; a current transformer that detects the motor stator current (that is, the input state of the three-phase power supply of the motor); connecting current Transformer, the current conversion circuit that processes the signal returned by the current transformer; it is connected to the motor operation signal detection circuit and the current conversion circuit respectively, and processes the information returned by the motor operation signal detection circuit and the current conversion circuit. After phase failure, undercurrent, overcurrent or overheating of the motor, the central processing unit (which can be realized by MCU or other devices with logic processing functions) that sends out control alarms, motor power supply disconnection and closing signals; ...

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Abstract

The invention discloses a digitalized comprehensive motor protector, comprising a motor operating signal detecting circuit, a current transformer, a current converting circuit, a central processing unit, a control output relay and a fault output relay, wherein the central processing unit is respectively connected with the motor operating signal detecting circuit and the current converting circuit and is used for processing signals returned by the motor operating signal detecting circuit and the current converting circuit; and the control output relay and the fault output relay are connected with the central processing unit, and the control output relay is used for responding to control signals sent by the central processing unit. The digitalized comprehensive motor protector is characterized by further comprising an abnormal output relay which is connected with the central processing unit and is used for responding to a superior power circuit disconnection instruction sent by the central processing unit; and contacts controlled by the abnormal output relay are arranged in a superior power circuit. The digitalized comprehensive motor protector is used for preventing dangers on high-altitude weight dropping caused by abnormal conditions, so that not only is the production efficiency of national and industrial and mining enterprises guaranteed, but also the lives and the safety of working staff in workshops are better protected.

Description

technical field [0001] The invention relates to a digital motor comprehensive protector. Background technique [0002] The current motor protectors are generally characterized by strong singleness and low comprehensiveness, especially the protection means for crane motors are not perfect. Liaoning Qinghe Special Steel Co., Ltd. after the 4.18 accident, the direct cause of the accident was the failure of the forward and reverse contactors, which caused the motor to lose power while the brake was still powered on, causing heavy objects to fall out of control. 2007] Document No. 375, TS-GQ0002-2008 "Hoisting Machinery Safety Technology Supervision Regulations-Overhead Cranes" stipulates that the crane should have a forward and reverse contactor fault protection function to prevent the motor from losing power while the brake is still powered on. Cause the motor to stall and cause heavy objects to fall. According to the requirements of Article 7.4.6 of the new "Design Code for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/08H02H7/09H02H7/085H02H5/04
Inventor 滕波
Owner 大连美恒时代科技有限公司
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