High voltage pulse generator
- Morgantown, WV
An improved high-voltage pulse generator has been provided which is especially useful in ultrasonic testing of rock core samples. 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. 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. 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. 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. 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.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Assignee:
- United States of America as represented by United States Energy (Washington, DC)
- Patent Number(s):
- US 4011463
- OSTI ID:
- 862784
- Country of Publication:
- United States
- Language:
- English
Similar Records
High voltage pulse generator. [Patent application]
Regulator for charging a battery with a permanent magnet alternator
Related Subjects
pulse
generator
improved
high-voltage
provided
especially
useful
ultrasonic
testing
rock
core
samples
capacitors
charged
parallel
volts
proper
instance
coupled
series
produce
times
rapid
switching
paralleled
charging
configuration
discharging
accomplished
silicon-controlled
rectifiers
chain
self-triggered
following
initial
triggering
connected
plurality
timing
circuit
properly
synchronize
pulses
time
applied
parallel-connected
alternate
circuits
controlling
application
provides
selection
intervals
allow
connecting
recharging
begins
pulse-generating
including
corresponding
connect
triggered
diodes
series-connected
inductors
sufficiently
fast
repetition
rate
considerable
control
decay
circuit including
charging circuit
charging voltage
pulse repetition
voltage pulse
voltage pulses
repetition rate
especially useful
pulse generator
core sample
ultrasonic testing
triggering pulse
rock core
generating circuit
decay time
triggering circuit
high-voltage pulse
charging capacitor
allow sufficient
core samples
/307/