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

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 ...

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