Converter tilting electric transmission and control system

Abstract

The invention relates to a converter tilting electric drive control system, which comprises a plurality of frequency converters and a plurality of tilting electric motors which are respectively controlled by the inverters, wherein, a frequency converter is defined as a logic master frequency converter by a Master PLC, and others are defined as logic slave frequency converters by the Master PLC. All frequency converters are provided with CBP2 communication boards and communication that comprises given speed, control word and status words with the PLC through the Profibus-DP network is achieved;through analog channels that CUVC board comes with, a ring connection is formed among all frequency converters, to transmit torque components. The invention has the advantages of being simple and reliable, convenient on-line switching, high-precision control, fast dynamic response, and effectively solving the defects of poor balance, dynamic response slow and mechanical damage greater caused by that a speed controls three torque controls traditionally, or a control method that finds the balance torque by using the flexible machinery traditionally.

Description

technical field [0001] The invention relates to a converter tilting device for a steelmaking process in the metallurgical industry, in particular to an electric transmission control system for the converter tilting device. Background technique [0002] During the smelting operation of the converter tilting device, due to frequent starting, braking and acceleration and deceleration, it often produces severe torsional vibration and strong torsional vibration torque impact, which not only affects the mechanical life of the converter transmission equipment, but even causes equipment accidents. According to the process requirements, the tilting angle of the converter is ±360°, and the furnace mouth and bottom axis of the converter are in the zero state when they are perpendicular to the ground plane, so the furnace tilting load moment belongs to the negative negative potential energy load. When the furnace body is in the positive torque state, the motor is in the electric running...

AI Technical Summary

Problems solved by technology

At present, there are many schemes for controlling the tilting of the converter, and the commonly used one is the torque / speed control mode, but there are some shortcomings such as poor torque balance, slow dynamic response, and inability to switch online.

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