Method for frequency conversion transmission control of crown block unmanned system

Abstract

The invention relates to a method for frequency conversion transmission control of a crown block unmanned system, and belongs to the technical field of unmanned crown block equipment. According to thetechnical scheme, the method includes the four steps of crown block control mode switching, flux weakening speed regulating under crown block main hook frequency conversion control, large and small vehicle frequency conversion transmission performance optimization and main hook rotating and clamping arm motor frequency conversion control. The method has the beneficial effects that various controlmodes of crown block running are achieved, the highest rotating speed of a motor is increased, the work efficiency of a crown block is improved, the swinging angle of a main hook during running of the crown block is effectively inhibited, and accurate positioning of the crown block is achieved; during main hook rotating, due to set adjustment on a speed increasing and decreasing slope of a frequency converter, hook head swinging caused by rotation can be effectively inhibited; and a clamping arm motor achieves accurate positioning of the clamping arm width through frequency conversion controlduring opening and closing of a clamping arm. According to the method, due to reasonable design and configuration of a transmission system and optimization of frequency conversion speed regulation, the control performance of the crown block unmanned system is improved.

Description

technical field [0001] The invention relates to a frequency conversion transmission control method for an unmanned crane system, belonging to the technical field of unmanned crane equipment. Background technique [0002] The unattended crane technology is an advanced crane control method. The unattended crane technology has high requirements on the related technical equipment and control methods of the crane. Important factor——to highlight its important position in improving the working efficiency of the crane. The control method of the unmanned crane transmission system is often to control the inverter through the DP network communication of the PLC controller, and this single control method will affect the entire warehouse when a certain crane control system in the warehouse area fails. The overall operation of the crane in the area will increase the accident time of the crane and have a certain impact on the efficiency of the unmanned crane. Unmanned overhead cranes gen...

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Problems solved by technology

[0003] In addition, the rotating motor of the main hook of the unmanned crane is generally controlled by a contactor, and the angle is controlled by a limit detection switch. When rotating, the swing amplitude of the spreader is large and the angle control accuracy is not high; the jib motor is often controlled by a contactor. , which makes the control precision of the jig arm not high, and it is easy to cause the steel coil to be bruised and pinched during the automatic operation of the crane.

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