This is highly required in the purpose of various ultrasonic-based evaluations, particularly when high resolution measurement is necessary. This paper presents the generation of a high-voltage short pulse for the excitation of high frequency ultrasonic transducers. Hidayat, Darmawan Setianto, Syafei, Nendi Suhendi Wibawa, Bambang Mukti
#Transformator tesla na ne555 generator#
MOSFET-based high voltage short pulse generator for ultrasonic transducer excitation
#Transformator tesla na ne555 series#
The high-voltage pulse-generating circuit including the N capacitors and corresponding SCR's which connect the capacitors in series when triggered "on" further includes diodes and series-connected inductors between the parallel-connected charging capacitors which allow sufficiently fast charging of the capacitors for a high pulse repetition rate and yet allow considerable control of the decay time of the high-voltage pulses from the pulse-generating circuit. Alternate circuits are provided for controlling the application of the charging voltage from a charging circuit to be applied to the parallel capacitors which provides a selection of at least two different intervals in which the charging voltage is turned "off" to allow the SCR's connecting the capacitors in series to turn "off" before recharging begins. A timing and triggering circuit is provided to properly synchronize triggering pulses to the first SCR at a time when the charging voltage is not being applied to the parallel-connected charging capacitors. Rapid switching of the capacitors from the paralleled charging configuration to the series discharging configuration is accomplished by using silicon-controlled rectifiers which are chain self-triggered following the initial triggering of a first one of the rectifiers connected between the first and second of the plurality of charging capacitors.
An N number of capacitors are charged in parallel to V volts and at the proper instance are coupled in series to produce a high-voltage pulse of N times V volts. An improved high-voltage pulse generator has been provided which is especially useful in ultrasonic testing of rock core samples.
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