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Power supply and control system for metal solidifying process

A metal solidification and power supply technology, which is applied in the field of melt solidification device and its control system, can solve the problems of irregular waveform, unstable current amplitude, pulse width and frequency cannot be continuously adjusted and controlled, etc.

Inactive Publication Date: 2005-02-23
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

At present, the voltage-type quasi-pulse power supply composed of R-L-C circuit is mostly used. Its waveform is irregular, the current amplitude is unstable, and the pulse width and frequency cannot be continuously adjusted and controlled. It is difficult to use this kind of power supply to accurately control the solidification process of metal alloys. control and analysis

Method used

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  • Power supply and control system for metal solidifying process
  • Power supply and control system for metal solidifying process
  • Power supply and control system for metal solidifying process

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Embodiment Construction

[0010] Such as Figure 1 As shown, the present invention is a power supply and its control system for the metal solidification process. Composed of transformer (4), pulse current detector (5), and computer control unit (6), the three-phase alternating current is converted into a voltage-controllable DC pulsating voltage through a three-phase fully-controlled rectifier bridge circuit (1), and then filtered by DC The device (2) becomes a DC voltage, which becomes a pulse voltage through a single-phase inverter bridge circuit (3), and then becomes a pulse current after passing through a pulse transformer (4) and a load (4′), and is controlled by a pulse current detector (5) The detection is carried out, and the detection amount is fed back to the computer control unit (6) for control. The pulse current detector (5) is a Hall current sensor. The computer control unit (6) takes the embedded single-chip microcomputer PIC16F877 as the core.

[0011] As shown in Figure 2, the three-...

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Abstract

An electric power supply used in metal solidifying procedure for applying pulse current in molten metal to automatically hold the current value constant, and with the continuously regulatable pulse width and frequency and the switching between monopolarity and bipolarity for pulse current is composed of three-phase full-bridge rectifier, DC filter, single-phase inverter bridge, pulse transformer, pulse current detecter, and computer control unit.

Description

technical field [0001] The present invention relates to the device and control system of melt solidification method controlled by electric field or magnetic field. Background technique [0002] The action mechanism of electric field and magnetic field on the solidification process of metal has its particularity. The pulsed electric field has a good inoculation effect on the solidification process of metal and its solidification structure. significantly improved. At present, most of the voltage-type quasi-pulse power supplies composed of R-L-C circuits are used. Its waveform is irregular, the current amplitude is unstable, and the pulse width and frequency cannot be continuously adjusted and controlled. It is difficult to accurately control the solidification process of metal alloys by using this type of power supply. control and analysis. Contents of the invention [0003] The purpose of the invention is to keep the current amplitude constant automatically, the pulse wid...

Claims

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Application Information

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IPC IPC(8): B22D27/02
Inventor 王兴贵尹建军强明辉许广济李海波袁俊房伟
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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