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Title: E-beam high voltage switching power supply

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 ofmore » 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.« less
Authors:
 [1] ;  [2]
  1. (Danville, CA)
  2. (Livermore, CA)
Publication Date:
OSTI Identifier:
870860
Report Number(s):
US 5610452
5610452
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
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/