公开(公告)号：EP0540716A1

公开(公告)日：1993-05-12

申请号：EP92910850.0

申请日：1992-03-30

Applicant: SUNDSTRAND CORPORATION, INC.

Inventor： ROZMAN, Gregory, I.

IPC: H02P9 ,  H02H7 ,  H02H9

CPC classification number: H02P9/102 ,  H02H7/067 ,  H02H9/041 ,  H02P2101/30

Abstract: Les systèmes antérieurs de production de courant produisaient des tensions de sortie présentant des surtensions transitoires indésirables et relativement importantes en raison de réductions soudaines de charge. Afin de surmonter ce désavantage, un système de production de courant servant à produire une tension omnibus continue sur une barre omnibus cc (14) est équipé d'un commutateur (80) couplé à travers la barre omnibus cc (14) afin de supprimer les phénomènes transitoires de surtension. Le système de production de courant comprend un générateur synchrone (24) qui produit un courant alternatif et un redresseur (54) qui redresse le courant alternatif pour produire du courant continu et alimenter la barre omnibus cc (14) en courant continu. Un régulateur de tension (62) commande l'intensité de la tension de la barre omnibus cc en variant la quantité de courant fournie à une bobine inductrice (46) associée au générateur synchrone (24). Un commutateur (80) est couplé à travers la barre omnibus cc (14) et est commuté de manière répétitive lorsque la tension de l'omnibus cc atteint une intensité prédéterminée.

公开(公告)号：EP0756778A1

公开(公告)日：1997-02-05

申请号：EP95925230.0

申请日：1995-04-11

Applicant: SUNDSTRAND CORPORATION

Inventor： BANSAL, Madan ,  ROZMAN, Gregory, I. ,  HEGLUND, William, S. ,  TSAI, Shan-chin

IPC: G01P3 ,  H02P21

CPC classification number: G01P3/48 ,  H02P21/18

Abstract: The present invention provides for detecting rotor speed through the use of sense coils (240) on the stator teeth. Voltage ripples caused by the rotor slots (SC-1) is detected by combining the signals of several sense coils so that the fundamental voltage signal is cancelled or rejected and only the ripple voltages remain which is a signal proportional to speed. Further, the present invention provides for using a generator (220) to control voltage to the induction motor (222) with a PWM inverter (226) to control frequency signals to the induction motor (222).

公开(公告)号：EP0917758A1

公开(公告)日：1999-05-26

申请号：EP97935309.0

申请日：1997-08-04

Applicant: SUNDSTRAND CORPORATION, INC.

Inventor： ROZMAN, Gregory, I. ,  MARKUNAS, Albert, L. ,  HANSON, Michael, J. ,  WEBER, Leland, E.

IPC: H02P9

CPC classification number: H02P9/02 ,  H02P9/08 ,  H02P9/302 ,  H02P2101/30

Abstract: A motor generator system (120) in accordance with the invention includes a prime mover (21) for driving an output shaft (18), a main motor generator (105), having a rotor driven by the output shaft, for producing electrical power on at least one output winding (36a-36c) in response to the prime mover rotating the output shaft and for driving the output shaft in response to operation as a motor; an exciter (102) for applying excitation to a field winding (34) of the main motor generator during operation for producing electrical power on the at least one output winding and for applying current to the field winding of the main motor and generator to produce a magnetic field in the field winding during operation of the main motor generator as a motor; circuitry (122), responsive to current in a field winding (204) of the exciter, for producing an output signal representing a position of the rotor of the main motor generator driven by the output shaft; and a main inverter (114), responsive to the output signal, for commutating application of electrical current to the at least one output winding to control operation of the main motor generator during operation as a motor.

公开(公告)号：EP0706728A1

公开(公告)日：1996-04-17

申请号：EP94917289.0

申请日：1994-05-06

Applicant: SUNDSTRAND CORPORATION

Inventor： CARR, Kenneth, R. ,  SHIPPLING, James A. ,  MC ARTHUR, Malcolm, J. ,  ROZMAN, Gregory, I. ,  MARKUNAS, Albert, L. ,  HANSON, Michael, J. ,  WEBER, Leland, E. ,  MADDALI, Vijay, K. ,  NUECHTERLEIN, Paul, E. ,  COOK, Alexander ,  NGUYEN, Vietson ,  RINALDI, Mario, R.

IPC: F01D15 ,  F02C7 ,  F02N11 ,  H02P9

CPC classification number: F02N11/04 ,  F05B2220/50 ,  H02P9/302

Abstract: Systems and methods for starting a prime mover (21), such as a gas turbine engine of an aircraft auxiliary power unit (APU), are disclosed herein whereby an electromagnetic machine (10) is operated as a motor during operation in a self starting mode to bring the prime mover (21) up to selfsustaining speed. The same electromagnetic machine (10) is thereafter operated as a generator during operation in a generating mode.