公开(公告)号：WO1986001950A1

公开(公告)日：1986-03-27

申请号：PCT/US1985001767

申请日：1985-09-13

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  HENDERSON, Eric, A.

IPC: H02M07/538

CPC classification number: H03K17/08146 ,  H02M3/3378 ,  H02M2001/342 ,  H02M2001/344 ,  Y02B70/1491

Abstract: A snubber circuit (26, 28) for protecting power switches (Q1, Q2) which modulate the flow of power through an inductive element (12) in a power converter, such as a main primary winding (12a, 12b) of a transformer (12), includes a snubbing capacitor (C1 or C2) and a first switch (S1 or S3) which is operable to connect the snubbing capacitor (C1 or C3) to a power switch (Q1 or Q3). A second switch (S2 or S4) is operable to connect the snubbing capacitor (C1 or C3) to an auxiliary primary winding (12d or 12e) of the transformer (12). The first (S1 or S3) and second (S2 or S4) switches are operated so that immediately prior to turn-off of the power switch (Q1 or Q2), the capacitor (C1 or C2) is connected thereto to store the turn-off reactive power caused by turn-off of the power switch (Q1 or Q2). The first switch (S1 or S3) is then opened and the second switch (S2 or S4) closed to couple the reactive power to the auxiliary primary winding (12d or 12e) to improve the efficieny of the converter.

Abstract translation: 用于保护功率开关的缓冲电路，其通过诸如变压器的主初级绕组的功率转换器中的电感元件调节功率流动，包括缓冲电容器和第一开关，其可操作以将缓冲电容器连接到 开关;电源开关。 第二开关可操作以将缓冲电容器连接到变压器的辅助初级绕组。 操作第一和第二开关使得在电源开关断开之前，将电容器连接到其上以存储由电源开关断开引起的关断无功功率。 然后打开第一开关，第二开关闭合以将无功功率耦合到辅助初级绕组，以提高转换器的效率。

公开(公告)号：WO1990005402A1

公开(公告)日：1990-05-17

申请号：PCT/US1989004285

申请日：1989-09-29

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  HENDERSON, Eric, A.

IPC: H02J01/10

CPC classification number: H02J3/44 ,  Y10T307/724 ,  Y10T307/735

Abstract: A power generation system (40), (120) is disclosed in which the phase and frequency of alternating current generated by one or more generators (14) is locked to the phase of alternating current generated by a master generator (12) or to an external power source (124). A master control unit (42), (122) contains a master count generator (52) which generates a synchronization count which is transmitted to each generator control unit (44). The synchronization count at any point in time of the master count generator is directly proportional to the phase of electrical current being generated by the master generator or the external power source. Each generator control unit (44) receives the synchronization count and compares the synchronization count with a locally generated synchronization count which is proportional to the phase of electrical current being generated by a generator controlled by the generator control unit receiving the synchronization count. The phase of the alternating current generated by the generators controlled by the each generator control unit receiving the synchronization count is adjusted as a function of the difference of the received and locally generated synchronization count to lock the phase and frequency of the alternating current with the phase and frequency of alternating current generated by the master generator or the phase and frequency of the external power source.

公开(公告)号：EP0195801A1

公开(公告)日：1986-10-01

申请号：EP85904745.0

申请日：1985-09-13

Applicant: SUNDSTRAND CORPORATION

Inventor： HENDERSON, Eric, A.

IPC: H02M3 ,  H03K17

CPC classification number: H03K17/08146 ,  H02M3/3378 ,  H02M2001/342 ,  H02M2001/344 ,  Y02B70/1491

Abstract: Un circuit amortisseur (26, 28) servant à protéger des commutateurs électriques (Q1, Q2) qui modulent le flux de courant à travers un élément inductif (12) dans un convertisseur de puissance tel qu'un enroulement primaire (12a, 12b) d'un transformateur (12), comprend un condensateur amortisseur (C1 ou C2) et un premier commutateur (S1 ou S3) reliant le condensateur amortisseur (C1 ou C3) à un commutateur de puissance (Q1 ou Q3). Un deuxième commutateur (S2 ou S4) relie le condensateur amortisseur (C1 ou C3) à un enroulement primaire auxiliaire (12d ou 12e) du transformateur (12). Le premier (S1 ou S3) et le deuxième (S2 ou S4) commutateurs sont actionnés de sorte qu'immédiatement avant la mise hors tension du commutateur de puissance (Q1 ou Q2) le condensateur (C1 ou C2) y est relié pour stocker la puissance réactive de mise hors tension provoquée par la mise hors tension du commutateur de puissance (Q1 ou Q2). Le premier commutateur (S1 ou S3) est alors ouvert et le deuxième commutateur (S2 ou S4) fermé pour coupler la puissance réactive à l'enroulement primaire auxiliaire (12d ou 12e) afin d'améliorer l'efficacité du convertisseur.