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1. (WO1991007809) APPARATUS FOR A BALANCED THREE PHASE AC POWER SUPPLY IN A COMPUTER HAVING VARIABLE DC LOADS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007809 International Application No.: PCT/US1990/006856
Publication Date: 30.05.1991 International Filing Date: 21.11.1990
Chapter 2 Demand Filed: 19.06.1991
IPC:
H02J 3/26 (2006.01) ,H02M 1/00 (2007.01) ,H02M 7/23 (2006.01)
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
J
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
3
Circuit arrangements for ac mains or ac distribution networks
26
Arrangements for eliminating or reducing asymmetry in polyphase networks
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
M
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1
Details of apparatus for conversion
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
M
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7
Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
02
Conversion of ac power input into dc power output without possibility of reversal
04
by static converters
12
using discharge tubes with control electrode or semiconductor devices with control electrode
21
using devices of a triode or transistor type requiring continuous application of a control signal
217
using semiconductor devices only
23
arranged for operation in parallel
Applicants:
TANDEM COMPUTERS INCORPORATED [US/US]; 19333 Vallco Parkway Cupertino, CA 95014, US
Inventors:
TIGHE, Donald, J.; US
NEILSON, Joseph, S.; US
Agent:
KRUEGER, Charles, E.; Townsend and Townsend One Market Plaza, 2000 Steuart Tower San Francisco, CA 94105, US
Priority Data:
440,96722.11.1989US
Title (EN) APPARATUS FOR A BALANCED THREE PHASE AC POWER SUPPLY IN A COMPUTER HAVING VARIABLE DC LOADS
(FR) APPAREIL D'ALIMENTATION EN PUISSANCE DE COURANT ALTERNATIF TRIPHASE EQUILIBREE POUR ORDINATEUR A CHARGES DE COURANT CONTINU VARIABLES
Abstract:
(EN) A balanced three phase AC power supply (12) for a computer system having unbalanced, variable DC loads (34). AC to DC converters (18a-c) utilize high power factor correction circuitry to impose a sinusoidal current loading waveshape (23) substantially in phase with the AC voltage (24). Each AC to DC converter outputs equal DC voltages maintaining a balanced loading on the AC power source. The design and organization of the power supply components make the supply fault tolerant when one phase (øA, øB, øC) of AC power or one AC to DC converter is lost due to malfunction or servicing.
(FR) Alimentation (12) en puissance de courant alternatif triphasé équilibrée, pour système informatique à charges (34) de courant continu variable non équilibrée. Les convertisseurs (18a à c) de courant alternatif en courant continu, utilisent un circuit de correction de facteur de puissance élevé, afin d'imposer une forme d'onde (23) de charge de courant sinusoïdale, en phase avec la tension (24) de courant alternatif. Chaque convertisseur de courant alternatif en courant continu produit des tensions de courant continu égales maintenant une charge équilibrée sur les sources de puissance de courant alternatif. La conception et l'organisation des composants d'alimentation en puissance rendent l'alimentation insensible aux défaillances lorsqu'une phase (øA, øB, øC) de puissance de courant alternatif ou un convertisseur de courant alternatif en courant continu est perdu du fait d'un mauvais fonctionnement ou d'une intervention.
Designated States: AU, CA, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0502096CA2068864AU1991068962