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Publication Title | TURBINE/ALTERNATORONACOMMON SHAFT WITH AN ASSOCIATED ELECTRICALSYSTEM

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Text | TURBINE/ALTERNATORONACOMMON SHAFT WITH AN ASSOCIATED ELECTRICALSYSTEM | 001



(12)United States Patent Bhargava

(10)Patent N0.: US 6,323,625 B1 (45) Date of Patent: *Nov. 27, 2001

4,219,739 8/1980Greenwell..322/29

(54)

(76) (*)

TURBINE/ALTERNATORONACOMMON SHAFT WITH AN ASSOCIATED ELECTRICALSYSTEM

5,036,267 * 7/1991 Markunasetal.. 5,055,764*10/1991 RoZmanetal.. 5,497,615 3/1996

. 322/10 ..322/10 60/39511

Inventor: BDr.i,jSBa.ntBahaBrargbaavra,4C5A96(USSie)rr9a31M1a0dre

. . . . 5903116*51999G'tl............................318140

Notice:

ThlS patent issued on a contmued pros-

ecution application ?led under 37 CFR

1.53(d), and is subject to the twenty year patenttermprovisionsof35USC

’ ’ / 615 e a

FOREIGN PATENT DOCUMENTS

“109825014 12/1997(W0)' * cited by examiner

Assistant Examl'1er—Peter_Med1ey

(74) Attorney, Agent, or Fzrm—Koppel & Jacobs; Michael J. Ram

(57) ABSTRACT

An electrical system for a turbine/alternator comprising a gas driven turbine and permanent magnet alternator rotor rotating on a common shaft and comprising an inverter circuitconnectedeithertoanACoutputcircuitorthestator Windingsofthealternator.A controlcircuitduringstart-up

154(a)(2).

Subjecttoanydisclaimer,thetermofthis PrimaryExaminer—E1VinEnad

patent is extended or adjusted under 35 USO 154(k))by0days'

_

(21) Appl.N0.:09/115,308 (22) Filed: Jul. 14, 1998

Related U-S-APPIICZIUOII Data ___ __

(62) 313195;ofapphcatlonNO-PCT/US97/22405>?ledonDec-

(60) p’rovisionalapplicationNO‘60/032,149’?ledonDec‘3’ modeconnectstheinvertercircuittothestator'Wmdmgsof

1996

7

(51) Int.Cl. ..H02H 9/00

the alternator and during the poWer generation mode it sWitchesandconnectstheinvertercircuittotheAC output Circuit Thus, during the starmlp mode, the alternator func_ [ions as a motor to raise the Speed of the turbine [O a Safe ignition speed and in the poWer generation mode the system provides poWer through the AC output circuit, electrical poWer having a frequency and voltage unrelated to the

rotationalspeedoftheturbine/alternator. 26 Claims, 8 Drawing Sheets

U-S- Cl- ..................

(58) Field of Search

...........................

.322/10, 32; 318/140

_ (56) References Clted

U S PATENT DOCUMENTS

4,119,861 * 10/1978 Gocho .. 290/13

COMPRESSOR -TURBlNE

ALTERNATOR

L2 1 L3

INSTRUMENTS START ALTERNATOR 8 CONTROLS POWER OUTPUT

POWER

-—-—IPTHREE-PHASE USER POWER

OUTPUT

SZSOIZMO * 9/1998

'310/156 /

/'l l

-'—-——--CONTROL PANEL

ELECTRICAL SYSTEM

LINE TIE DATA INPUT

US006323625B1

Image | TURBINE/ALTERNATORONACOMMON SHAFT WITH AN ASSOCIATED ELECTRICALSYSTEM



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