Metal mixer tilting system and control method thereof

Abstract

The invention relates to a metal mixer tilting system comprising a tilting reduction box connected with a metal mixer. The tilting reduction box is connected with a driving motor and a driven motor; the driving motor and the driven motor are respectively connected to a driving frequency converter and a driven frequency converter, wherein the tilting reduction box also comprises a PLC controller used for transmitting starting and rotating speed instruction to the driving frequency converter; the driven frequency converter comprises a rotating speed receiving device connected with an optical fiber master / slave ring net, wherein the rotating speed receiving device is used for receiving the rotating speed information of the driving frequency converter sent by a rotating speed transmitting device of the driving frequency converter and enabling the driven frequency converter to run at the rotating speed being the same as that of the driving frequency converter, thereby ensuring the output torque height of the two motors respectively connected with the driving frequency converter to be consistent, and therefore, the overcurrent failure of the frequency converter and the overvoltage failure of a DC loop of the frequency converter can be avoided.

Description

Technical field [0001] The invention relates to a mixing furnace, in particular to a mixing furnace tilting system and a control method thereof. Background technique [0002] The mixing furnace tilting system is a device used to dump the molten iron contained in the mixing furnace. The existing mixing furnace tilting system includes a tilting reducer connected to the mixing furnace. The tilting reducer is powered by two motors. They are powered by inverters. Two motors (55KW) are used and one is in standby. When one motor is running, the other is in passive operation. [0003] When the mixing furnace tilting system starts, the passive motor absorbs a lot of energy from zero speed to normal operating speed, and the current will be large when the motor is started, so that the inverter of the motor in use will have an overcurrent fault. [0004] When the mixing furnace tilting system is closed, the backup motor releases energy from the normal working speed to zero speed. When the motor...

AI Technical Summary

Problems solved by technology

[0004] When the tilting system of the mixed iron furnace is turned off, the standby motor releases energy from normal working speed to zero speed, and the active motor stops energy consumption until it absorbs this part of energy, resulting in too much energy fed back to the inverter DC circuit, causing the inverter DC circuit overvoltage fault

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