(19)
(11) EP 1 290 780 A2

(12)

(88) Date of publication A3:
14.03.2002

(43) Date of publication:
12.03.2003 Bulletin 2003/11

(21) Application number: 01935337.4

(22) Date of filing: 11.05.2001
(51) International Patent Classification (IPC)7H02M 7/5387, F04D 13/08
(86) International application number:
PCT/US0115/249
(87) International publication number:
WO 0108/9068 (22.11.2001 Gazette 2001/47)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 12.05.2000 US 203792 P
17.05.2000 US 204818 P

(71) Applicant: BAKER HUGHES INCORPORATED
HoustonTexas 77027 (US)

(72) Inventors:
  • RIDER, Jerald
    Catoosa, OK 74015 (US)
  • LAYTON, James, E.
    Chelsea, OK 74016 (US)
  • LEUTHEN, John, M.
    Claremore, OK 74016 (US)
  • KNOX, Dick, L.
    Claremore, OK 74016 (US)

(74) Representative: Finck, Dieter, Dr.Ing. et al
v. Füner Ebbinghaus Finck HanoMariahilfplatz 2 - 3
81541 München
81541 München (DE)

   


(54) METHOD FOR BOOSTING THE OUTPUT VOLTAGE OF A VARIABLE FREQUENCY DRIVE