Control method, control system and crane controller of digital intelligent crane

Abstract

A control method and control system for a digital intelligent crane, and a crane controller, the control method and control system employing a control mode combining switching value control with communication control; the switching value control is used to control the forward-reverse rotation of a motor via an external switching value input interface, and the control mode does not require any communication address, and gear shift operation is temporarily disabled; the communication control is used to control the forward-reverse rotation via an RS485 bus, and requires an unrepeated communication address on the bus. The two control modes must be connected to a resistance box, protecting a solid-state relay from a heavy current surge caused by direct starting of the motor, thus reducing the failure rate, and ensuring the normal operation of the crane. In addition, the crane controllers can share the same power supply (601) and a micro-processor (603), thus simplifying the circuitry of a multi-quadrant crane, and reducing cost.

Description

technical field [0001] The invention relates to the technical field of crane control, and more specifically relates to a control method, a control system and a crane controller of a digital intelligent crane. Background technique [0002] With the continuous development of existing industries, cranes have become a very widely used mechanical equipment in industrial and mining enterprises, such as mining, metallurgy, carbon refining, cement and electric power industries. Specifically, cranes are mechanical equipment used for lifting, transporting, loading, unloading, and installing materials. [0003] The traditional crane control method is composed of contactors, mechanical buttons and other devices. The current crane control is mainly used to realize the on-off and forward and reverse rotation of the motor. It mainly uses a wound AC asynchronous motor. Speed, using cam controller, relay-contactor control, with the continuous development of intelligence, this traditional el...

AI Technical Summary

Problems solved by technology

[0003] The traditional crane control method is composed of contactors, mechanical buttons and other devices. The current crane control is mainly used to realize the on-off and forward and reverse rotation of the motor. It mainly uses a wound AC asynchronous motor. Speed, using cam controller, relay-contactor control, with the continuous development of intelligence, this traditional electrical control method has been unable to meet the development direction of intelligent cranes, its main disadvantages are: relay-contactor control in frequent In the case of switching, the impact current is large, resulting in burning of contacts, fire of brushes, burning and breaking of resistors connected to the motor and rotor, and the failure rate is very high, which affects the normal operation of the crane.

Images