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Publication Title | Ulllted States Patent [19] Geisetal. TURBOGENERATOR/MOTOR CONTROLLER

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Text | Ulllted States Patent [19] Geisetal. TURBOGENERATOR/MOTOR CONTROLLER | 001



Ulllted States Patent [19] Geisetal.

[54] TURBOGENERATOR/MOTOR CONTROLLER

[75] Inventors: EverettR.Geis,TrabucoCanyon; - -

ggtlglgfwc'allzincolas’RedondoBeach’

[73] Assigneez CapstoneTurbineCorporation, TarZana, Calif.

[21] Appl.N0.:08/924,966

[22] Flled' Sep'8’1997

[51] Int.Cl.6 ..H02P 5/20

[52] US. Cl. ..318/140; 318/145; 318/147;

318/375

[58] Field of Search ...318/140,145, 318/147, 375

US005903116A [1] PatentNumber:

[45] DateofPatent:

5,309,081 5/1994 Shahetal.. 5,363,032 11/1994 Hansonetal.. 5,364,309 11/1994 Heidrichetal..

grsliley~tt1 ,, eawaea..

5,903,116 May11,1999

[56]

References Cited

USPATENTDOCUMENTS

278647244 12/1958 Prachar_ 3,124,942 3/1964 Rothfusseta1__ 3,703,076 11/1972 Hagemeister_ 4,265,099 5/1981 Johnsonetal.. 4,560,364 12/1985 Cohen- 478027882 2/1989 Heidrich- 4’841’216 6/1989 Okadaeta1‘'

(')'

5,250,890 10/1993 Tanamachietal..

5,291,106 3/1994 Murtyetal...318/375X

5,581,168 12/1996 RoZmanet81.

5,594,322 1/1997 RoZman et al. .

5,637,987 6/1997 Fatticetal...318/375X

Primary Examiner—Karen Masih Attorney, Agent, or Firm—Albert J. Miller

[57] ABSTRACT

A turbogenerator/motorcontrollerWithamicroprocessor based inverter having multiple modes of operation. To start the turbine, the inverter eehheetS t9 and supplies ?Xed current,variablevoltage,variablefrequency,AC poWerto the Permanent magnet turbegeherater/meter, driving the permanent magnet turbogenerator/motor as a motor to accel eratethegasturbine.Duringthisacceleration,sparkandfuel are introduced in the correct sequence, and self-sustaining gas turbine operating conditions are reached. The inverter is thendisconnectedfromthepermanentmagnetgenerator/ motor, recon?gured to a controlled 60 hertZ mode, and then either supplies regulated 60 hertZ three phase voltage to a stand alone load or phase locks to the utility, or to other like controllers, to operate as a supplement to the utility. In this mode ofoperation,thepoWerfortheinverterisderivedfrom the permanent magnet generator/motor via high frequency recti?er bridges. The microprocessor monitors turbine con ditions and controls fuel How to the gas turbine combustor.

25Claims,3DrawingSheets

49 48/

AC FILTER 52

4G CONTACT

58

POWER GATE SUPPLY DRIVES

56

CONTROL

LOGIC 65

41

IGNITOR

SOLENOID

E RECTIFIER

VALVE

54

CONTACTOR

Gb

CONECTOR 42

12

G0 13

Image | Ulllted States Patent [19] Geisetal. TURBOGENERATOR/MOTOR CONTROLLER



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