Controller capable of inhibiting mechanical impact of revolving furnace body

Abstract

The invention relates to a controller which can inhibit the mechanical impact of a converter body, which is characterized in that the controller uses four electric motors for the tilting of a converter, four driving control devices are adopted, the direct current main loop output ends of the four devices are connected in parallel to control the four electric motors, wherein one of four devices isused as a main control device, and the other three devices are used as driven devices, the main control device is provided with a voltage ring and an electric current ring, and the control impulse phase angles of the driven devices are received from main control impulses. The invention guarantees the same length of cables arranged from a rectifier transformer to each device, reduces the relay interlocking inside a driving control system, and increases the reliability of the system, can conveniently read each parameter of the driving system in order to display pictures and monitor, can meet the index requirements of production devices, and ensures the stable operation of mechanical equipment.

Description

technical field [0001] The invention is an electrical drive control system for the tilting of a converter body, and relates to a controller capable of suppressing the mechanical impact of the converter body. Background technique [0002] At present, there are two main types of electrical transmission controllers for converter body tilting: one is a one-to-four controller, and the other is a four-to-four controller. The so-called one-to-four controller means that four motor armatures used for the tilting of the converter body are connected in parallel and controlled by a thyristor controller. The performance and existence of the controller: 1. In order to ensure the balance of the torque of the four motors, 10% softening resistance or DC reactor must be connected in series in the armature circuit of each motor. A 50% resistor is connected in series in each motor excitation circuit to adjust the motor excitation current. 2. Changes in temperature with seasons will cause chan...

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Problems solved by technology

2. Changes in temperature with seasons will cause changes in circuit impedance, and resistance heating and aging corrosion will also cause changes in resistance values ​​over time. The characteristics of the four motors will also change as the working time increases. These Factors will cause the torque imbalance of the four motors, so the entire control system must be regularly inspected and debugged

However, the realization of these networks is not possible due to common backup devices, so the advantages brought by network technology are all lost here

5. The modern converter mechanical system is generally a full-suspension four-point meshing flexible transmission, and the machining accuracy of the four gearboxes cannot be completely consistent

The modern converter mechanical system is generally a full-suspension four-point meshing flexible transmission, and the machining accuracy of the four gearboxes cannot be completely consistent

Four drives and four controllers have strict requirements on mechanical precision. When the machining precision of the four gearboxes is not high, or the mechanical wear increases with the prolongation of production time, the system will not be able to run stably and the performance will be poor. The noise of the mechanical system increases and the mechanical shock is severe

Due to the current following effect of the master / slave device, the actual value of the current of the slave device also increases with the same amplitude. When the gear box gears of the slave motor are meshed, the sum of the output torques of the four motors is much greater than the actual value. Load torque causes speed overshoot, which causes repeated adjustment of the entire control system, which is manifested in production machinery, causing mechanical vibration, increased impact, and furnace body shake

In severe cases, it cannot even be produced, causing major accidents such as mechanical damage

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