E-beam high voltage switching power supply

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:870860

Shimer, Daniel W ^[1]; Lange, Arnold C ^[2]

---

1. Danville, CA
2. Livermore, CA

A high power, solid state power supply is described for producing a controllable, constant high voltage output under varying and arcing loads suitable for powering an electron beam gun or other ion source. The present power supply is most useful for outputs in a range of about 100-400 kW or more. The power supply is comprised of a plurality of discrete switching type dc-dc converter modules, each comprising a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, and an output rectifier for producing a dc voltage at the output of each module. The inputs to the converter modules are fed from a common dc rectifier/filter and are linked together in parallel through decoupling networks to suppress high frequency input interactions. The outputs of the converter modules are linked together in series and connected to the input of the transmission line to the load through a decoupling and line matching network. The dc-dc converter modules are phase activated such that for n modules, each module is activated equally 360.degree./n out of phase with respect to a successive module. The phased activation of the converter modules, combined with the square current waveforms out of the step up transformers, allows the power supply to operate with greatly reduced output capacitance values which minimizes the stored energy available for discharge into an electron beam gun or the like during arcing. The present power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle using simulated voltage feedback signals and voltage feedback loops. Circuitry is also provided for sensing incipient arc currents reflected at the output of the power supply and for simultaneously decoupling the power supply circuitry from the arcing load.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5610452
• Application Number: 5610452
• OSTI ID: 870860
• Country of Publication: United States
• Language: English

Related Subjects

e-beam
voltage
switching
power
supply
solid
described
producing
controllable
constant
output
varying
arcing
loads
suitable
powering
electron
beam
gun
source
useful
outputs
range
100-400
kw
comprised
plurality
discrete
type
dc-dc
converter
modules
comprising
regulator
inductor
inverter
frequency
square
wave
current
alternating
polarity
improved
clamping
circuit
step
transformer
rectifier
dc
module
inputs
fed
common
filter
linked
parallel
decoupling
networks
suppress
input
interactions
series
connected
transmission
line
load
matching
network
phase
activated
equally
360
degree
respect
successive
phased
activation
combined
waveforms
transformers
allows
operate
greatly
reduced
capacitance
values
minimizes
stored
energy
available
discharge
provides
dynamic
response
controlling
duty
cycle
simulated
feedback
signals
loops
circuitry
provided
sensing
incipient
currents
reflected
simultaneously
voltage regulator
voltage switching
feedback signal
converter modules
matching network
clamping circuit
dc-dc converter
feedback loop
voltage output
transmission line
electron beam
power supply
dc voltage
duty cycle
stored energy
greatly reduced
square wave
provides dynamic
regulator duty
sensing incipient
switching type
supply circuitry
wave current
varying loads
arcing load
arcing loads
inverter voltage
output rectifier
alternating polarity
switching power
voltage clamping
discrete switching
dynamic response
beam gun
greatly reduce
feedback loops
frequency square
improved inverter
voltage clamp
voltage switch
decoupling network
/307/363/