A multi-channel parallel cross-cycle driven high-frequency micro-energy pulse power supply for electrical machining

Abstract

The invention provides a high-frequency micro energy electromachining pulsed power supply using multichannel parallel-connection cross circulation drive. A power control unit in a power source comprises multiple channels of discharging paths. Each channel of discharging path is formed by connecting a metal-oxide semiconductor field effect transistor and a current-limiting resistance module in series. Each current-limiting resistance module is formed in the way that multiple current-limiting resistors and switches are connected in series and then connected in parallel. The drain electrodes of the metal-oxide semiconductor field effect transistors of the power control unit are in parallel end connection with the positive electrode of a power supply unit. All channels of the other end of the power control unit are correspondingly connected with one end of a current-limiting channel unit and one end of a current-discharging channel unit. A field-programmable gate array in a drive unit is controlled to output multiple channels and to be connected with the grid electrodes of the multiple metal-oxide semiconductor field effect transistors of the power control unit and all control terminals of the current-discharging channel unit separately. By means of the high-frequency micro energy electromachining pulsed power supply, high-frequency pulse discharge can be realized.

Description

technical field [0001] The invention relates to a pulse power supply, in particular to a high-frequency micro-energy pulse power supply for micro-electric machining, in particular to a high-frequency micro-energy pulse power supply with multi-channel parallel cross cycle drive control output. Background technique [0002] With the development of the manufacturing industry, especially in the fields of aviation manufacturing and electronics, the demand for micro-machines is increasing, which has prompted the emergence and development of micro-EDM technology. As an important part of the micro-EDM machine tool, the pulse power supply is used to generate pulse discharge between the tool electrode and the workpiece, supply the energy required for the discharge gap, and generate high temperature and high pressure to melt and vaporize metal. [0003] Relevant studies have shown that the metal removal amount of each discharge is related to the energy of a single pulse discharge, and ...

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Problems solved by technology

[0005] In order to overcome the problem of low discharge frequency of the existing electrical machining micro-energy pulse power supply, the present invention provides a high-frequency micro-energy pulse power supply with multi-channel parallel cross cycle drive control output

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