25 kA, 5000 V solid state opening switch for inductive energy stores
ABSTRACT A self-commutated solid-state switch has been developed for use as
an opening device for an inductive energy store. 25 kA, 5000 V operation
has been obtained in a compact switch module. The switch topology is a
compact switch module. The switch topology is a two-stage hybrid
consisting of an SCR-FET/SCR-IGBT (insulated gate bipolar transistor)
combination. The switch is designed to charge an inductive energy store
and repetitively commutate the current to a dynamic load. A 25 kA switch
module has been built and tested on a battery test stand at General
Atomics. The theory of operation, circuit topology, and test results are
25 kA, 5000 V Solid State Opening Switch for
Inductive Energy Stores
Mark W. Heyse, James B. Comette, Nolan E. Taconi
Wright Laboratory, Armament Directorate
Analysis and Strateglc Defense Division
Electromagnetic Launcher Technology Branch (WL/MNSH)
Eglin AFB FL 32542-5000
Ed E. Bowles, W. G. Homeyer, John M. Rawls
General Atomics, Inc.
San Diego CA 92186
FINAL REPORT FOR PERIOD APRIL 1990 - APRIL 1992
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13. ABSTRACT (Maximum 200 woird)
mere aao. 25 kA, 500 V operation has been obtained in a compact switch module, Tihe switch topoogy
is a twoos hybri conuisting of an SCR-FET / SCR-IOBT combinstimn Mw switch is designed to
ChWp so indeCtive energ sbwi sd epetitively commutate the cwren to a dynamzic lod. A 25 kA switch
mode ban been, built aod tused on a battea weud at Genera Atomics. Mwe theory of opeation, ciruit
toplog sod wet results are given in this paper
Saw switch has been develoed for un se ain opning device for so indcive
NUMBER OF PAGES
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20. LIMITATION OF ABSTAC
Form 296 (Rev. 2-09)
This report documents research conducted on a solid state opening/closing switch for
inductive energy store. This technical report was presented at the 6th Electromagnetic
Launcher Confirnce in Austin, TX on 28 April to May 1992.
This work was funded by the Electromagnetic Launcher Technology Branch
of the Analysis and Strategic Defense Division of the Air Force Wright
at Eglin AFB, Fl under the Kinetic Energy Weapons program of the Strategic
Defense Initiative. Mr Mark W. Heyse, Mr James B. Cornette and Nolan E. Taconi from
WL/MNSH, and p-ronnel from General Atomics, Inc (GA) in San Diego, Ca prormed
the work during the period of April 1990 to April 1992 at General Atomics in San Diego,
DTIC QUALITY INSPECTED 8
25 kA, 5000 V SOLID STATE OPENING SWITCH
FOR INDUCTIVE ENERGY STORES
E. E. Bowles, W. 0. Homcyer and J. M. Rawls
General Atomics San Diego, Calif. 92186
M. W. Heyse, J. B. Cornette, and N. E. Taconi Jr.
Wright Laboratory Eglin Air Force Base, Fl. 32542
- A self- commnutated solid state switch
ban been developed for an as an opening device for
&1 an fte
han bean obtaned in a compact switch module. The
Is a two -stageo hybrid consisting
of am SCR-IE
I SCR.I03T combination. The
Mwtth Is desiged to charge as Iaductive energy
store and repetitively commutate the current to a
dyna m&lod A 25 ILA switch module has been
bult and tested om a batt"
Atomla. The thory af operatlom, circuit topology
and tam result ane given In this paper.
E HOYO PR7O
hw ici ceai
i~i ceai o h eosrto
switch. It can be seen that the switch is of a hybrid design
with two conduction paths and four active switching
o h eosmo
store. 25 kA, SOW V operation
test Stand at General
dinides dM eqicid e n
In tdo e at inuctive aay iS.
Of adogumY rafd openisg xwitchos A eapscitive energy
ai0m moods only a cluing switch to deliver energ to a load.
High power closin switches an availb in the form of
1 9 5 a, iIluau and SMR
m M)l comloct coN1m-m in eccss of 100 kA. but once
n the caum
On tmod ha" loeigsiau
clos &nd ceonuct c myP -t to charge the energy
UO UutUslly opn romaipt to Centm flo)
End coellnt (mft) die com
N Oen wit
in "i opening phs of thek day. in conwat m
ifrl i hav exetoa tlt
bat a~emhm lames ad have reatvey low single
k~o~da.1k ffim 1f*6
ciudun 1MN ad suffacenty highfa
seme. A iNwion
has been theavailability
Each of thes devices can
Fig. 1. Opening switch circuit schematic.
As will be explained, ame differen switching elements of
111e MMui schemat petain to the differen switching phase
idcvenergy stor opening swti mut mapor
to di lad. Mechial
OTOM L d -.he rd traslssts we availa"l for
ty but all have much lower power
Close and conduct inductor current from
zero to nwxmum with minimum losses.
Requires low conduction voltage drop,
Upos commnand, commutate ciumn out of
switch and into the load by forcing a
voltage drop across the switch.
Rsqvus high commutationa voltage and
s t bd adlap
a lb ~ rd m s do dulp sad muting of a
1 ''~ ~
Blok y voltage poducd bydihe dyinnic
lad aud maintain zero current in the