Method and device for controlling multi-motor variable-frequency drive of belt conveyor

A belt conveyor, multi-motor technology, applied in the direction of speed adjustment of multiple motors, can solve the problem that the belt conveyor cannot automatically adapt to load changes, and achieve the effect of ensuring stable operation

Inactive Publication Date: 2012-11-07
ZOOMLION ENVIRONMENTAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to provide a multi-motor frequency conversion drive control method and device for a belt co...

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  • Method and device for controlling multi-motor variable-frequency drive of belt conveyor
  • Method and device for controlling multi-motor variable-frequency drive of belt conveyor
  • Method and device for controlling multi-motor variable-frequency drive of belt conveyor

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Embodiment 1

[0044] This embodiment provides a multi-motor variable frequency drive control method for a belt conveyor. It is mainly adjusted for the unbalanced state of load distribution during the start, stop and constant speed operation of the conveyor to ensure the stable operation of the equipment. Its main implementation method is as follows (this embodiment is described by taking dual motors and two-point drive as an example):

[0045] image 3 A schematic diagram of the multi-motor variable frequency drive principle of the belt conveyor according to the first embodiment of the present invention is shown. like image 3 As shown in the figure, the belt conveyor includes two motors. Among the two motors, the motor on the conveying direction side is the main control motor, the inverter controlling the motor is the main inverter, and the motor on the other side is the main control motor. From the motor, its inverter is a slave inverter.

[0046] Input the actual current data and act...

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Abstract

The invention provides a method and a device for controlling multi-motor variable-frequency drive of a belt conveyor. The method includes: judging whether load of a master motor and load of a slave motor of the belt conveyor to be balanced or not; and when a load difference value of the master motor and the slave motor exceeds a preset value, adjusting the load of the master motor and/or the slave motor, and when the load difference value of the master motor and the slave motor reaches a preset adjustment stop interval, stopping adjustment of the load of the master motor and/or the slave motor. By the method and the device, the belt conveyor can automatically adapt to load change conditions during operation by means of adjustment of unbalanced states of the master motor and the slave motor of the belt conveyor, so that stable operation of the belt conveyor is guaranteed.

Description

technical field [0001] The invention relates to the field of mechanical engineering, and more particularly, to a multi-motor variable frequency drive control method and device for a belt conveyor. Background technique [0002] With the gradual development of electronic technology, more and more large belt conveyors are driven and controlled by frequency converters to achieve the functional requirements of soft start, soft stop and multi-speed operation. However, in practical applications, the load characteristics of the conveyor system will vary with the ambient temperature and the loading section. How to match the drive characteristics of the inverter, which are hard and the overload capacity is far smaller than the overload capacity of the motor, is related to the load characteristics. Matching, avoiding the phenomenon of motor overheating, inverter overload tripping and system running instability, and achieving the load balance of each motor in the system has always been ...

Claims

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Application Information

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IPC IPC(8): H02P5/46
Inventor 马杰
Owner ZOOMLION ENVIRONMENTAL IND CO LTD
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