Abstract
In micro electro discharge machining (EDM), single pulse energy of pulsed power supply needs to be limited to a micro order of magnitude. One developing direction is to reduce the discharge pulse width for increasing discharging frequency. In order to research on micro EDM with nanometer gaps and nanometer removing units, a novel pulsed power supply with nanosecond pulse width was developed based on triode avalanche principle. The basic electric circuit with a steepening electric circuit was designed for the nanosecond pulse width. The test results show that the discharge pulses with an adjustable peak voltage and a pulse width down to 18 ns can be obtained. The developed pulsed power supply can output a single pulse and continuous pulses under high frequency.
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