公开(公告)号：WO1993006651A1

公开(公告)日：1993-04-01

申请号：PCT/US1992007824

申请日：1992-09-16

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  FLICK, John, R. ,  SIMS, Cecil, W.

IPC: H02M07/12

CPC classification number: H02H7/1255

Abstract: A system is disclosed including an AC sensor (40) for providing an AC sensor signal (V, W) based upon AC (E1) on AC lines (12-14), a DC sensor (33) for providing a DC sensor signal (X, Y) based upon DC, and a fault detector (71-77) for providing a fault indicating signal (V1-V2) based upon a difference between the AC sensor signal (V, W) and the DC sensor signal (X, Y).

公开(公告)号：WO1993004523A1

公开(公告)日：1993-03-04

申请号：PCT/US1992006865

申请日：1992-08-14

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  SCHUMACHER, Mark, E.

IPC: H02M01/12

CPC classification number: H02M7/48 ,  G01R31/30

Abstract: A method for testing an inverter drive logic switching pattern signal combines six pulse width modulated switching signal pairs (UPAON, UPAOFF, LOAON, LOAOFF, UPBON, UPBOFF, LOBON, LOBOFF, UPCON, UPCOFF, LOCOFF, LOCON) into six intermediate signals and further combines these six intermediate signals (64, 70, 76, 82, 88, 94) to produce three composite signals (98, 102, 106). The three composite signals are used to produce a test signal which is monitored to detect a failure in at least one of the pulse width modulated switching signals. Individual pairs of the intermediate signals can be further combined to produce three additional test signals (BPHA, BPHB, BPHC) which are used to detect a failure in a particular one of the pulse width modulated signals. These three additional test signals (BPHA, BPHB, BPHC) can be further combined to produce a fifth test signal (126) which can be analyzed to detect an abnormal polarity in the pulse width modulated switching signals. The invention encompasses both the above test method and circuits which perform that method.

公开(公告)号：WO1992022957A1

公开(公告)日：1992-12-23

申请号：PCT/US1992005007

申请日：1992-06-11

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  CROWE, Lawrence, E. ,  METZLER, Mark, W.

IPC: H02M05/458

CPC classification number: H02M7/5387 ,  H02M5/458 ,  H02M7/003

Abstract: The inverter module according to the present invention includes a component support for supporting components attached thereto, an AC/DC converter (40) attached to the support for converting input AC into DC, inverter switches (41) attached to the support for inverting the DC into single-phase output AC, a switch controller (55) attached to the support for controlling the inverter switches (41), and connectors for interconnecting the AC/DC converter (40), the inverter switches (41), and the switch controller (55) so that input AC is converted to a single phase (45) of output AC.

公开(公告)号：WO1992022821A1

公开(公告)日：1992-12-23

申请号：PCT/US1992004745

申请日：1992-06-04

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  TERRY, Thomas, Edward ,  STODDARD, Damon, Rance

IPC: G01P15/13

CPC classification number: G01P15/132

Abstract: An accelerometer that includes a proof mass assembly (12) comprising a paddle (20) flexurally mounted to a support (22), a sensing circuit for detecting movement of the paddle, and a force rebalance system (14, 30). The sensing circuit includes a capacitor plate (32) positioned on a surface of the paddle. The proof mass assembly is clamped between upper and lower mounting pieces (14, 16) positioned on opposite sides of the proof mass assembly from one another. One or more fasteners (18) extend between the upper and lower mounting pieces through the proof mass assembly. The support is shaped so as to form openings (52) through which the fasteners pass, such that the support isolates each fastener from the paddle. This arrangement isolates the paddle from a source of contamination, provides for a more evenly distributed clamping force, and minimizes distortion of the mounting pieces. The fastener openings in the support may be shaped so as to limit movement of the paddle towards the flexures.

公开(公告)号：WO1992020131A2

公开(公告)日：1992-11-12

申请号：PCT/US1992003530

申请日：1992-04-29

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  LYNCH, Leo, A. ,  KRINICKAS, Alexander, Jr. ,  PARKER, Barry, J. ,  SHAH, Mahesh ,  VAIDYA, Jayant ,  HUSS, John, B.

IPC: H02K01/22

CPC classification number: H02K21/029 ,  H02K16/00 ,  H02K21/24

Abstract: A permanent magnet generator having a plurality of permanent magnet generator units which produce a controlled output potential by mutual magnetic flux linkage between the permanent magnet generator units to produce the controlled output potential in accordance with the invention includes a plurality of permanent magnet rotors (20 and 22) mounted on a drive shaft (26) with at least one of the rotors being rotatable with respect to the drive shaft to vary an angular position of the at least one of the rotors relative to the shaft to produce a mutual variable magnitude magnetic axial field extending parallel to the drive shaft; at least one stator (26, 28, 72) disposed at a position axially offset from the plurality of rotors which is magnetically coupled to the variable magnitude permanent magnet axially field; and a mechanism (46, 48) responsive to a stator fault for angularly positioning the rotors relative to each other so that the permanent magnetic field coupled to the at least one stator is zero.

公开(公告)号：WO1991010054A1

公开(公告)日：1991-07-11

申请号：PCT/US1990007463

申请日：1990-12-17

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  SHEKLETON, Jack, Ross

IPC: F02C07/26

CPC classification number: F02C7/262

Abstract: Difficulties in starting a gas turbine engine at high altitudes may be avoided by the method of starting such an engine which includes the steps of introducing fuel into the combustor (26) of the engine through at least one fuel injector (46) having an outlet (76, 78) within the combustor (26), atomizing the fuel with a burst of oxidant at elevated pressure from a source (92) of pressurized stored oxidant until ignition is obtained, and thereafter discontinuing the burst of oxidant from the source (92).

Abstract translation: 可以通过启动这种发动机的方法来避免在高海拔起动燃气涡轮发动机的困难，其包括通过至少一个燃料喷射器（46）将燃料引入发动机的燃烧器（26）的步骤，该喷射器具有出口 76）在燃烧器（26）内，在加压存储的氧化剂的源（92）的高压下，用一盎司的氧化剂雾化燃料，直到获得点燃，然后从源（92）中断脉冲氧化剂， 。

公开(公告)号：WO1991009454A1

公开(公告)日：1991-06-27

申请号：PCT/US1990006553

申请日：1990-11-08

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  NUECHTERLEIN, Paul, E.

IPC: H02M01/14

CPC classification number: H02M1/15

Abstract: Prior attempts to remove ripple from DC power carried on DC conductors have utilized large and bulky filters which undesirably add size and weight. In order to overcome this problem, a ripple reduction circuit (30) includes a controllable switch (Q1) whereby the impedance (R2) and the switch (Q1) are coupled between first and second DC conductors (26A, 26B) and gating circuitry (40) coupled between one of the conductors and a control electrode (36) of the controllable switch (Q1) for closing the switch (Q1) when AC ripple power is carried by the conductors (26A, 26B) whereby at least a portion of the AC ripple power is removed from the conductors (26A, 26B) and delivered to the impedance (R2).

Abstract translation: 在直流导体上携带的直流电源中去除纹波的先前尝试已经使用了大而笨重的滤波器，这不利地增加了尺寸和重量。 为了解决这个问题，纹波降低电路（30）包括可控开关（Q1），由此阻抗（R2）和开关（Q1）耦合在第一和第二DC导体（26A，26B）和门控电路 40），其耦合在所述导体之一和所述可控开关（Q1）的控制电极（36）之间，用于当由所述导体（26A，26B）承载AC纹波功率时闭合所述开关（Q1），由此至少一部分所述导体 AC纹波功率从导体（26A，26B）移除并传送到阻抗（R2）。

公开(公告)号：WO1991009450A1

公开(公告)日：1991-06-27

申请号：PCT/US1990006564

申请日：1990-11-08

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  HUSS, John ,  HOPPE, Richard, J. ,  CROWE, Lawrence, E. ,  SUTRINA, Thomas ,  LAKIN, Eric, D.

IPC: H02M01/00

CPC classification number: H05K1/0265 ,  H05K1/0203 ,  H05K1/16 ,  H05K1/167 ,  H05K3/0061 ,  H05K2201/10166 ,  H05K2201/10174

Abstract: Prior power converters have utilized discrete components mounted on circuit boards of different design. Failure of one or more of the components requires the components to be separately tested to determine which is faulty. The faulty component or the board containing same must then be replaced. This results in significant down time for the inverter and can require stocking of a large number of specialized boards. In order to overcome these problems, an inverter (22) is assembled using a series of circuit boards (80, 82, 84) of standardized type. Each circuit board includes separate layers (101, 102-136, RS1+, 280, 290, 292) which interconnect components mounted thereon together with a heat exchanger (102) which cools high power components. When a malfunction of a component occurs, the entire board may be replaced so that inverter down time is minimized. Also, the use of standardized boards reduces stocking requirements and inventory costs.

公开(公告)号：WO1991009439A1

公开(公告)日：1991-06-27

申请号：PCT/US1990006562

申请日：1990-11-08

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  NUECHTERLEIN, Paul, E.

IPC: H02H07/122

CPC classification number: H02M1/38

Abstract: A snubber circuit for a power switch (Q1) includes a capacitor (C1) coupled across main current path electrodes of the switch, an inductor (L) having a first end coupled to one of the main current path electrodes of the power switch and a second end and a controllable switch (QA) having a first main current path electrode coupled to the second end of the inductor, a second main current path electrode of the power switch and a control electrode. A control circuit (40) is coupled to the power switch and the controllable switch and turns on the controllable switch when a gating signal is commanding turn-on of the power switch and the voltage across the main current path electrodes of the power switch is above a certain level so that the capacitor is discharged through the inductor at such time. The control circuit subsequently turns off the controllable switch and turns on the power switch while the gating signal is commanding turn-on of the latter switch when the voltage across the main current path electrodes thereof falls below the certain level.

公开(公告)号：WO1991007800A1

公开(公告)日：1991-05-30

申请号：PCT/US1990005714

申请日：1990-10-04

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  FOSTER, Joseph ,  RASHID, Abdul

IPC: H02J03/00

CPC classification number: H02P9/30 ,  H02P2101/30 ,  Y10T307/718

Abstract: The problem of stabilizing operation of a load division control (74) is resolved using a phase angle counter circuit (90) which calculates phase angle insensitive to frequency changes of the output voltage waveform. The phase angle counter circuit (90) includes a series of counters (94, 96, 100 and 102) for calculating phase angle.