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Electroslag furnace control system

A control system and electroslag furnace technology, applied in the direction of furnace control devices, furnaces, furnace components, etc., can solve the problems of low control precision, slow response speed, dead zone, etc., and achieve high control precision, fast response speed, The effect of eliminating static friction

Inactive Publication Date: 2003-07-02
沈阳工业学院
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Problems solved by technology

[0002] At present, the DC servo system used for electroslag furnaces, no matter at home or abroad, adopts the ordinary double-loop logic non-circulation system. In the smelting control of electroslag furnaces, there are slow response speeds, overshoots, dead zones, and low-speed performance. Not good, the system is complicated, the control accuracy is not high, etc.

Method used

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  • Electroslag furnace control system

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Embodiment Construction

[0017] Such as figure 1 As shown, the present invention consists of a power supply protection main air switch 1, a main contactor 2, an auto-coupling Scott rectifier transformer 3, two thyristor modules 4, an overcurrent Hall transformer 5, a thermal relay 6, and a DC motor 7. Scott synchronous transformer 8, voltage type Hall transformer 9, main signal device 10, speed regulator 11, IE adder 12, asymmetric amplifier 13, offset circuit 14 and pulse and pulse transformer 15, and regulation Trigger device 37, adjust symmetry circuit 38, offset residual voltage circuit 39, the additional circuit 16 that manual test run circuit 40 forms. The power supply device of the present invention is as figure 2 As shown, the main contactor 2 and the Scott synchronous transformer 8 are connected to the lower end of the power protection main switch at the same time, and the output terminals +a and -b of the Scott synchronous transformer 8 are respectively connected to two A pulse chip is co...

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Abstract

A control system of electroslag furnace is composed of power supply unit, primary signal unit, regulating trigger unit and auxiliary circuits. The main contactor and Scott synchronous transformer are connected to lower terminals of protecting switch for power supply unit. An auto-coupled Scott rectifying transformer has the input connected to main contactor and two outputs connected two SCR modules. The terminal 2219 of regulating trigger unit is serially connected to speed regulator, IE adder, static circulating current eliminator, shift circuit, pulse chip and pulse transformer.

Description

Technical field [0001] A control system for an electroslag furnace belongs to the field of automatic control. Background technique [0002] At present, the DC servo system used for electroslag furnaces, no matter at home or abroad, adopts the ordinary double-loop logic non-circulation system. In the smelting control of electroslag furnaces, there are slow response speeds, overshoots, dead zones, and low-speed performance. Not good, the system is complicated, the control precision is not high and so on. Contents of the invention [0003] In view of the above problems, the present invention provides a simple and reliable control system for electroslag furnaces that can eliminate the non-linearity of rectification output when the given signal is small, eliminate static friction and no circulation, and have simple means. [0004] The present invention is composed of a power supply device, a main signal device, an adjustment trigger device and an additional circuit. The power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D19/00
Inventor 罗乾显潘建国姜凌
Owner 沈阳工业学院
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