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公开(公告)号：US20210044231A1
公开(公告)日：2021-02-11
申请号：US16537099
申请日：2019-08-09
Applicant: Hamilton Sundstrand Corporation
Inventor： Michael C. Harke , John F. Defenbaugh
Abstract: A method and controller for controlling a Wound Field Synchronous Machine (WFSM) of an electric power generation system (EPGS) having a field winding and a stator armature winding is provided. The controller includes an adjustable component coupled to the generator and a power factor controller for adjusting the adjustable component to lower the power factor of the WFSM as a function of power output to a load of the EPGS to stabilize a current in the field winding.
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公开(公告)号：US20200007057A1
公开(公告)日：2020-01-02
申请号：US16566062
申请日：2019-09-10
Applicant: Hamilton Sundstrand Corporation
Inventor： Brian R. Golden , Adrian E. Vandergrift , John F. Defenbaugh
Abstract: An assembly according to an embodiment of the present disclosure includes, among other things, a synchronous machine including a rotating portion and a stationary portion, the rotating portion including at least one rotating diode coupled to a field winding, and the stationary portion including a stator winding and an exciter winding. A control unit includes a first gate and a second gate. The exciter winding is connected in series to the first gate and the second gate during a first operating mode to energize the exciter winding. The exciter winding is electrically connected in series to a first gate but is electrically disconnected from the second gate in a second, different operating mode to electrically disconnect the exciter winding from an exciter energy source. A method of operating a synchronous machine is also disclosed.
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公开(公告)号：US10469011B2
公开(公告)日：2019-11-05
申请号：US15675090
申请日：2017-08-11
Applicant: HAMILTON SUNDSTRAND CORPORATION
Inventor： Brian R. Golden , Adrian E. Vandergrift , John F. Defenbaugh
Abstract: An assembly according to an embodiment of the present disclosure includes, among other things, a synchronous machine including a rotating portion and a stationary portion, the rotating portion including at least one rotating diode coupled to a field winding, and the stationary portion including a stator winding and an exciter winding. A control unit includes a first gate and a second gate. The exciter winding is connected in series to the first gate and the second gate during a first operating mode to energize the exciter winding. The exciter winding is electrically connected in series to a first gate but is electrically disconnected from the second gate in a second, different operating mode to electrically disconnect the exciter winding from an exciter energy source. A method of operating a synchronous machine is also disclosed.
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公开(公告)号：US10326394B2
公开(公告)日：2019-06-18
申请号：US15792475
申请日：2017-10-24
Applicant: Hamilton Sundstrand Corporation
Inventor： Diego A. Rocha , Dhaval Patel , Jonathan C. Dell , John F. Defenbaugh , Eric A. Brust , Andreas C. Koenig
Abstract: An aircraft main power generation system includes a rotor shaft, a main power generator a permanent magnet, an exciter, an aircraft power bus, and a generator control unit. The generator control unit is configured to provide a control current to the exciter in response to a speed of the main power generator reaching a threshold speed and electrically couple the main power generator to the aircraft power bus in response to the speed of the main power generator reaching a minimum operating speed, the threshold speed being lower than the minimum operating speed; or provide a control current to the exciter in response to the speed of the main power generator reaching a predetermined speed and electrically coupling the main power generator to the aircraft power bus in response to a time period elapsing after the speed of the main power generator has reached the predetermined speed.
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公开(公告)号：US20190123669A1
公开(公告)日：2019-04-25
申请号：US15792475
申请日：2017-10-24
Applicant: Hamilton Sundstrand Corporation
Inventor： Diego A. Rocha , Dhaval Patel , Jonathan C. Dell , John F. Defenbaugh , Eric A. Brust , Andreas C. Koenig
Abstract: An aircraft main power generation system includes a rotor shaft, a main power generator a permanent magnet, an exciter, an aircraft power bus, and a generator control unit. The generator control unit is configured to provide a control current to the exciter in response to a speed of the main power generator reaching a threshold speed and electrically couple the main power generator to the aircraft power bus in response to the speed of the main power generator reaching a minimum operating speed, the threshold speed being lower than the minimum operating speed; or provide a control current to the exciter in response to the speed of the main power generator reaching a predetermined speed and electrically coupling the main power generator to the aircraft power bus in response to a time period elapsing after the speed of the main power generator has reached the predetermined speed.
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Patent Agency Ranking
公开(公告)号：US20150137786A1
公开(公告)日：2015-05-21
申请号：US14606293
申请日：2015-01-27
Applicant: Hamilton Sundstrand Corporation
Inventor： Vijay K. Maddali , John F. Defenbaugh
CPC classification number: H02M1/32 , H02H7/065 , H02M1/08 , H02M5/293 , H02M2005/2932 , H02P9/006 , H02P9/302
Abstract: A method of limiting a generator voltage in an overvoltage condition includes the steps of determining an amount of overvoltage of a generator output voltage exceeding a specified voltage and calculating a reference threshold voltage based upon the duration of overvoltage. A switch is modulated according to a voltage error between the output voltage and the reference threshold voltage. The current flow within the generator is interrupted based upon the voltage error to limit the output voltage to a desired voltage.
Abstract translation: 限制发电机电压处于过电压状态的方法包括以下步骤：确定发电机输出电压超过规定电压的过电压量，并根据过电压的持续时间计算参考阈值电压。 根据输出电压和参考阈值电压之间的电压误差来调制开关。 基于电压误差，发电机内的电流中断，以将输出电压限制到所需的电压。
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公开(公告)号：US20240195314A1
公开(公告)日：2024-06-13
申请号：US18080214
申请日：2022-12-13
Applicant: Hamilton Sundstrand Corporation
Inventor： Thomas P. Joyce , John F. Defenbaugh , Barry Drager
Abstract: A system includes a two-switch H-bridge topology, which has a first switch with a first gate drive connected to control on and off states of the first switch. A second switch has a second gate drive connected to control on and off states of the second switch. An exciter winding is connected from a first node between the first switch and a second flyback diode to a second node between a first flyback diode and the second switch. A controller is connected to control the first gate drive and the second gate drive in a mode wherein the first switch is always on while the second cycles as a duty-cycle-controlled switch element for the exciter winding.
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公开(公告)号：US11641101B2
公开(公告)日：2023-05-02
申请号：US17221481
申请日：2021-04-02
Applicant: Hamilton Sundstrand Corporation
Inventor： Joshua Berg , Jef William Good , John F. Defenbaugh
Abstract: A method includes detecting an initial fault in a system and opening a contactor to isolate a load bus from the system for a window of time. During the window of time, the method includes detecting whether current flows from a generator of the system. If current flows from the generator of the system during the window of time, the method includes isolating the load bus from the generator. If current does not flow from the generator to the system during the window of time, the method includes isolating the load bus from all sources including the generator.
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公开(公告)号：US11300600B2
公开(公告)日：2022-04-12
申请号：US16822230
申请日：2020-03-18
Applicant: Hamilton Sundstrand Corporation
Inventor： John F. Defenbaugh , Jef William Good , Joshua Berg
Abstract: In accordance with one or more embodiments, a system is provided. The system includes feeders, sensors, and a controller. The feeders connect a panel to a generator and a load. The sensors are on the feeders. The controller receives sensor signals from the sensors. The controller evaluates the sensor signals to determine a fault location.
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公开(公告)号：US20210293871A1
公开(公告)日：2021-09-23
申请号：US16822230
申请日：2020-03-18
Applicant: Hamilton Sundstrand Corporation
Inventor： John F. Defenbaugh , Jef William Good , Joshua Berg
Abstract: In accordance with one or more embodiments, a system is provided. The system includes feeders, sensors, and a controller. The feeders connect a panel to a generator and a load. The sensors are on the feeders. The controller receives sensor signals from the sensors. The controller evaluates the sensor signals to determine a fault location.
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