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Elevator contactor failure protection system and method

A failure protection, contactor technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as inability to monitor and protect, and achieve the effect of getting rid of interference, wide application range, and low environmental requirements.

Active Publication Date: 2016-11-02
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of this problem, in the prior art, the occurrence of such failures is usually reduced by shutting down the contactor for inspection and maintenance, but the corresponding monitoring and protection cannot be carried out online

Method used

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  • Elevator contactor failure protection system and method
  • Elevator contactor failure protection system and method
  • Elevator contactor failure protection system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the present invention provides an elevator contactor failure protection system, including:

[0043] Lift main circuit 1 with contactor K01L, used to drive and control the lift;

[0044] The phase loss protector A01 connected to the output end of the contactor K01L is used to monitor the voltage of the contactor K01L, and when the voltage fails, the phase loss protector A01 sends a corresponding electrical signal to PLC2;

[0045] And control the elevator PLC2, used to judge whether the contactor K01L is faulty according to the electrical signal received from the elevator main circuit 1 and the phase loss protector A01, and control the elevator main circuit when the fault of the contactor K01L is detected. Circuit 1 de-energizes and activates the motor brake. Specifically, PLC (Programmable Logic Controller) is an electronic device specially designed for digital operations in industrial environments. It uses a memory that can be programmed t...

Embodiment 2

[0062] Such as Figure 5 As shown, the present invention also provides another elevator contactor failure protection method, using the elevator contactor failure protection system of Embodiment 1, the method includes:

[0063] Step S1, the main circuit of the elevator with a contactor drives and controls the elevator;

[0064] Step S2, the phase loss protector connected to the output end of the contactor monitors the voltage of the contactor, and sends a corresponding electrical signal to the PLC when the voltage fails;

[0065] Step S3, the PLC connected to the main circuit of the elevator and the open-phase protector judges whether the contactor is faulty according to the electrical signal received from the main circuit of the elevator and the open-phase protector, and detects that the contactor is faulty When controlling the main circuit of the elevator to lose power and open the motor brake.

[0066] Preferably, after the step S3 of controlling the main circuit of the el...

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Abstract

The invention provides a system and a method for protecting failures of a lifter contactor. The method comprises the following steps: driving and controlling a lifter by a lifter main circuit with a contactor; monitoring the voltage of the contactor by an open-phase safeguard connected with the output end of the contactor, and sending an electric signal to a PLC (Programmable Logic Controller) during voltage faults; judging whether the contactor is in fault according to the electric signal received from the lifter main circuit and the open-phase safeguard by the PLC connected with the lifter main circuit and the open-phase safeguard, and controlling the loss of power of the lifter main circuit and starting a motor brake when the contactor is monitored to be in fault. The system and the method can play a role in protecting hardware when the contactor of the lifter main circuit is in fault, the lifter main circuit is controlled by the PLC, and the disturbance of other components and parts is prevented, so that the monitoring reliability is greatly improved, any circuit with a contactor can be well protected, and the system and the method are wide in application range, low in cost and low in using environmental requirement.

Description

technical field [0001] The invention relates to an elevator contactor failure protection system and method. Background technique [0002] At present, the chain (high temperature) elevator in the automatic conveying system of the workshop is usually controlled by a contactor, and the empty weight and counterweight of the elevator itself are equivalent, so when the elevator is loaded, when the control of the main circuit of the elevator contacts In the unlikely event of a device failure, the hoist with the load falls from a height under gravity. To solve this problem, in the prior art, the occurrence of such failures is usually reduced by shutting down the contactor for inspection and maintenance, but corresponding monitoring and protection cannot be performed online. Contents of the invention [0003] The purpose of the present invention is to provide an elevator contactor failure protection system and method, which can protect the hardware when the contactor of the main c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/22H02H7/09
Inventor 马惠庆郏炜星杨联华康剑敏
Owner SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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