Two-stage limited pulse width precision electrical discharge pulse power source

Abstract

The invention discloses a two-stage limited pulse width precision electrical discharge pulse power source. In the invention, an adjustable stabilized voltage source E1 is electrically connected with acurrent-limiting resistance array R1-Rn, a forestage FET Q1 and a discharge electrode anode P+ in sequence; a backward stage FET Q2 is electrically connected with the forestage FET Q1 in series, andis electrically connected with plus-minus discharge electrodes P+ and P- in parallel; the two FETs are inverting driven by high frequency and output rising edge and failing edge of the discharge pulserespectively to realize two-stage limited pulse width and limit the min output pulse width at 60ns, thus outputting microenergy discharge pulse.

Description

technical field [0001] The invention belongs to a precision discharge machining pulse power supply, in particular to a two-stage pulse width-limited precision discharge machining pulse power supply. By adopting the invention, a power source with narrow pulse width and small discharge energy can be obtained. Background technique [0002] In precision manufacturing fields such as precision electric discharge machining and precision electrolytic machining, a micro-energy pulse power supply is usually required, which is a key unit to realize precision electric machining. It can release electric energy at high frequency between the positive and negative electrodes, thereby generating instantaneous high temperature and high pressure, which can melt or even vaporize the tiny local materials of the parts, so as to achieve the purpose of precise micro-removal processing of the parts. The minimum amount of material removal is related to the energy of a single pulse. The smaller the e...

AI Technical Summary

Problems solved by technology

However, due to the switching speed of the switching elements and the delay of the control circuit elements, it is still difficult for the traditional transistor independent pulse power supply to realize the pulse width of tens of nanoseconds required for micro-electromachining, and the voltage pulse width is usually 0.1μs Above, in order to achieve more precise, higher-quality electrical machining, and even electrical machining with nanoscale dimensional accuracy, a pulse power supply with narrower pulse width and lower energy is required

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