CN218824605U

CN218824605U - Motor fault detection device for multiple shared frequency converters of gantry crane

Info

Publication number: CN218824605U
Application number: CN202223292386.7U
Authority: CN
Inventors: 费爱国; 张振华; 张健彪; 顾建川; 姜南乔; 孔雪龙; 林鹏; 韩譞鸣
Original assignee: Longwu Branch Shanghai International Port Group Co ltd; Shanghai International Port Group Co Ltd
Current assignee: Longwu Branch Shanghai International Port Group Co ltd; Shanghai International Port Group Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-07
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses a many sharing converter motor fault detection device of door machine, add three current transformer at every motor major loop, the electric current of each looks of mutual-inductor real-time detection single unit motor, the current data who detects out passes to current transmitter, current transmitter converts the data conversion that current transformer detected out to the analog signal, and with signal output to PLC analog input module, PLC is used for receiving the analog signal of current transmitter output and controls the output of converter, and export to touch-sensitive screen, show corresponding malfunction alerting data at the touch-sensitive screen, whether suggestion staff in time checks the motor normally, avoid the fault amplification of motor damage.

Description

Motor fault detection device for multiple shared frequency converters of gantry crane

Technical Field

The utility model relates to an electrical equipment, in particular to many sharing converter motor fault detection devices of door machine.

Background

The portal crane is a major large-scale loading and unloading machine for ports, and is indispensable for loading and unloading various miscellaneous goods. In order to ensure the synchronism and consistency of the motor speed regulation, a single frequency converter is usually adopted for speed regulation of the rotating mechanism and the traveling mechanism. Taking a gantry crane rotating mechanism controlled by frequency conversion speed regulation as an example: in order to ensure the working synchronism of the two rotating motors, the scheme that one frequency converter controls the two motors simultaneously is adopted, and the effect is good. But also find out there is kind of trouble phenomenon in daily use, it is more hidden, difficult discovery in time: if one of the rotating motors is damaged but the short circuit condition does not occur, the frequency converter does not necessarily give an alarm in time, so that the other rotating motor is always in an overload running state, a driver of the gantry crane does not know that the fault occurs, the gantry crane continues to operate the gantry crane to assemble and disassemble, and the remaining rotating motor is easily damaged.

In order to avoid the occurrence of such faults, the control is required from the aspect of hardware, fault points are found in time, and the problems of the same kind are avoided, so that unnecessary loss is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a when a motor appears not short-circuit failure in many motors to sharing converter, not in time discover and cause great economic loss's problem, provided a many sharing converter motor fault detection device of door machine, can not appear again after this suit of installation because of a motor damages the condition that other motors lead to the trouble to enlarge.

The utility model discloses mainly realize through following technical scheme:

the utility model provides a many sharing converter motor fault detection device of door machine for many motors of protection sharing converter, including current transformer, PLC and touch-sensitive screen, add three current transformer respectively at every motor major loop, current transformer is connected with current transformer, and current transformer is connected with PLC, PLC with the converter is connected, and the touch-sensitive screen is connected with PLC.

The three current transformers input the collected motor current to the current transmitter; the current transducer converts the motor current detected by the current transformer into an analog quantity signal and inputs the analog quantity signal to the PLC; and the PLC is used for receiving the analog quantity signal output by the current transducer, controlling the output of the frequency converter and outputting the signal to the touch screen.

The beneficial effects of the utility model reside in that: the utility model discloses many sharing converter motor fault detection device of door machine, after installing to the rotatory or running gear of door machine, its running state that can each motor of this mechanism of automatic monitoring, automatic shutdown converter output and give the fault alarm when the emergence current is unusual, suggestion staff in time handles the trouble, has prevented the expansion of trouble, has alleviateed economic loss. The device has reliable performance, and can effectively protect the motor of the gantry crane rotating or traveling mechanism.

Drawings

FIG. 1 is a connection block diagram of the present invention

Detailed Description

As shown in fig. 1, the utility model discloses a many sharing converter motor fault detection device of door machine for many motors of protection sharing converter, this set of detection device include that current transformer is connected with current transformer, and current transformer is connected with PLC, and PLC is connected with the converter, and the touch-sensitive screen is connected with PLC. Three current transformers are additionally arranged on a main loop of each motor, the current transformers detect the current of each phase of each motor in real time, detected current data are transmitted to a current transmitter, the current transmitter converts the data detected by the current transformers into analog quantity signals and outputs the analog quantity signals to a PLC analog quantity input module, and the acquired current data signals are analyzed, processed and output through a PLC so as to control the motors and give out fault alarms. The three current transformers are used for collecting the current of the motor and inputting the collected current to the current transducer; the current transducer is used for converting the current detected by the current transformer into an analog quantity signal and inputting the analog quantity signal to the PLC; the PLC is used for receiving the analog quantity signal output by the current transducer, controlling the output of the frequency converter and outputting the analog quantity signal to the touch screen; and the touch screen is used for displaying real-time current, voltage and frequency data of each motor and real-time and historical fault records to workers.

When the two rotating motors work normally, the motor current detected by the current transformer and the data collected by the PLC analog quantity module are normal.

When one rotating motor fails, the current detected by the corresponding current transformer and the data acquired by the PLC analog quantity module are abnormal (compared with the other rotating motor which normally works).

After the device is installed on a gantry crane rotating or traveling mechanism, the device can automatically monitor the running state of each motor of the mechanism, automatically stop the output of a frequency converter and give a fault alarm when current is abnormal, prompt workers to timely process faults, prevent the expansion of the faults and reduce economic loss. The device has reliable performance, and can effectively protect the motor of the gantry crane rotating or traveling mechanism.

Claims

1. The utility model provides a many sharing converter motor fault detection devices of door machine for many motors of protection sharing converter, its characterized in that: including current transformer, current transmitter, PLC and touch-sensitive screen, add three current transformer respectively in every motor major loop, current transformer is connected with current transmitter, and current transmitter is connected with PLC, PLC with the converter is connected, and the touch-sensitive screen is connected with PLC.

2. The multiple-inverter motor fault detection device for the door machine is characterized in that the three current transformers input collected motor currents to the current transformers; the current transducer converts the motor current detected by the current transformer into an analog quantity signal and inputs the analog quantity signal to the PLC; and the PLC is used for receiving the analog quantity signal output by the current transducer, controlling the output of the frequency converter and outputting the analog quantity signal to the touch screen.