Brake control apparatus for crane analog quantity stator voltage-adjusting and speed-adjusting control system

Abstract

The present invention discloses a brake control apparatus for a crane analog quantity stator voltage-adjusting and speed-adjusting control system. The brake control apparatus comprises a logic state detection module, an analog signal detection conversion module, an output module and a sequential logic control module respectively connected with various modules, and the sequential logic control module judges the working state of the crane according to the logic level signal transmitted by the logic state detection module and the analog signal detection conversion module, generates a brake control signal according to the working state of the crane, and transmits the brake control signal to the output module to output. According to the present invention, the brake control apparatus can be directly used for the crane analog quantity stator voltage-adjusting and speed-adjusting control system, the brake control apparatus and the existing control system can automatically co-control the crane mechanical brake according to the predetermined rule under the condition of no influence on the completeness of the existing control system so as to eliminate the defects of hook slipping and crane slipping of the existing control system, such that the purport of safe production is achieved.

Description

technical field [0001] The invention relates to a brake control device, in particular to a brake control device used in a crane control system. Background technique [0002] At present, the mainstream control system of cranes is generally divided into analog stator voltage regulation, digital stator voltage regulation and digital frequency converter speed regulation. Although the stator voltage regulation and speed regulation is developing towards an advanced digital quantity control method, the analog stator voltage regulation and speed regulation controller with high cost performance is still favored by many manufacturers and is still widely used. [0003] The analog stator voltage regulation and speed regulation controller is a mature thyristor phase control crane motor control system, which includes all common functions of crane control, but due to design defects, there are hidden dangers of slipping hooks or cars in production. Sliding hook or sliding car means that wh...

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Problems solved by technology

[0008] The above-mentioned method 1 adopts manual control, and the operator is inexperienced or negligent, and the phenomenon of sliding hook or car cannot be avoided; method 2 needs to modify the original controller circuit, which destroys the integrity of the original control system, and may cause malfunction

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