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A pulse power supply for wire electric discharge cutting and its control method

A technology of pulse power supply and electric spark wire, applied in the direction of program control, computer control, general control system, etc., to achieve the effect of increasing system switching frequency, flexible control algorithm, improving power density and reliability

Active Publication Date: 2019-06-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for the existing electric spark pulse power supply to meet the above requirements at the same time

Method used

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  • A pulse power supply for wire electric discharge cutting and its control method
  • A pulse power supply for wire electric discharge cutting and its control method
  • A pulse power supply for wire electric discharge cutting and its control method

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Embodiment Construction

[0018] The solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the wire electric discharge cutting pulse power supply includes an AC power supply, a PFC converter, a DC / DC converter, a main circuit, a detection circuit, a drive circuit, a control circuit and a host computer, wherein the AC power supply outputs an AC voltage, which passes through the PFC converter, After the DC / DC converter, output adjustable DC voltage to supply power to the main circuit; the main circuit provides unipolar voltage to the gap; the detection circuit collects the voltage and current of the PFC converter, DC / DC converter, the main circuit and the gap, and transmits To the control circuit; the control circuit outputs a control signal, and after being amplified by the drive circuit, drives the on-off of the PFC converter, DC / DC converter and main circuit switch tube to control the PFC converter...

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PUM

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Abstract

The invention discloses an electrospark wire-electrode cutting pulsed power supply and a control method thereof. The electrospark wire-electrode cutting pulsed power supply comprises an alternating-current power supply, a PFC convertor, a DC / DC convertor, a main circuit, a detecting circuit, a driving circuit, a control circuit and an upper computer, wherein a three-way staggered in-parallel Buckcircuit is adopted as the main circuit, supplies unipolar voltage to a gap and replaces current-limiting resistance with energy-storage inductance. According to the control method of the electrosparkwire-electrode cutting pulsed power supply, feedback closed-loop control is conducted by taking the sum of gap voltage and gap currents as the unique control quantity of feedback closed-loop control.Therefore, the machining efficiency and the switching frequency of a system are improved, the dynamic response capability of the system is improved, the current-resistant requirement on a switching tube is lowered, and on the condition that the discharge frequency is kept constant, the single-time discharge energy can be maintained consistent, and high-speed uniform micromachining can be achieved.

Description

technical field [0001] The invention relates to a high-frequency pulse power supply, in particular to a pulse power supply for wire electric discharge cutting and a control method based on the power supply. Background technique [0002] The wire electric discharge machine tool uses a continuously moving thin metal wire as an electrode to perform pulse spark discharge on the workpiece to etch the metal and cut it into shape, without using mechanical force and mechanical energy to cut it. Since wire electric discharge cutting technology is not limited by material properties, it can process any material with hardness, strength and brittleness, so it occupies a very important position in the current mechanical processing. [0003] The electric spark pulse power supply is the core component of the wire cutting machine tool. Existing EDM pulse power supplies generally include non-independent pulse power supplies and independent pulse power supplies. The non-independent pulse pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H7/02B23H7/04B23H7/14G05B19/042
CPCB23H7/02B23H7/04B23H7/14G05B19/0421G05B19/0423G05B2219/21137G05B2219/2214
Inventor 杨飞曹勇杨蛟华晗李春晖彭富明
Owner NANJING UNIV OF SCI & TECH
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