公开(公告)号：US12261098B2

公开(公告)日：2025-03-25

申请号：US17889511

申请日：2022-08-17

Applicant: Hamilton Sundstrand Corporation

Inventor： Yongduk Lee ,  Ankit Gupta ,  Parag M. Kshirsagar

IPC: H01L23/44 ,  H01L23/473 ,  H05K1/02 ,  H05K7/20

Abstract: Embodiments have two approaches as follows: (1) Embedded PCB-based fabrication and (2) PCB assembly-based fabrication. An embedded printed circuit board (PCB) type approach involves the creation of a space of coolant direct interconnection, using immersion cooling to link on any type of power semiconductor device hot spots to convectively and evaporatively cool directly. This means fabricating PCB embedded channels, to utilize the microgap between die and PCB as the cooling channel. A printed circuit board (PCB) assembly embodiment includes a PCB having at least one heat generating component. A lid is mounted to the PCB, wherein the lid defines a cooling path therein extending in a coolant flow direction from an inlet end of the cooling path to an outlet end of the cooling path.

公开(公告)号：US12213240B2

公开(公告)日：2025-01-28

申请号：US17946160

申请日：2022-09-16

Applicant: Hamilton Sundstrand Corporation

Inventor： Yongduk Lee ,  Ankit Gupta ,  Abbas A. Alahyari ,  Parag M. Kshirsagar

IPC: H05K1/02 ,  H05K3/30

Abstract: Direct pin-fin cooling assemblies are disclosed for a high-power printed circuit boards (PCBs). The disclosure can solve the classical coldplate problem associated with liquid cooling of high-power PCBs namely: (1) Inhomogeneous cooling due to the calorimetric heating up of the coolant, (2) thermal interface material (TIM) related quality issues such as dry-out effects, (3) high cost due to complicated metal coldplate structure, and (4) low thermal conductivity due to multi-layer structure. This includes incorporating pin-fin direct cooling into high-power PCB structures without additional coldplate structure or TIM. In this approach, a TIM and a top plate of coldplate can be removed. Thus, the cooling performance can be improved because the thermal conductivity between a liquid coolant and a power device is increased.

公开(公告)号：US20240118004A1

公开(公告)日：2024-04-11

申请号：US17962048

申请日：2022-10-07

Applicant: Hamilton Sundstrand Corporation

Inventor： Abbas A. Alahyari ,  Parag M. Kshirsagar

IPC: F25B9/10 ,  B64D27/24 ,  B64D33/08

CPC classification number: F25B9/10 ,  B64D27/24 ,  B64D33/08 ,  F25B2400/24

Abstract: A cryocooler device including a cryocooler including an input and an output, the input forming a cooling path, and a first stage that cools a working fluid in the cooling path. At least one thermal energy storage device selectively connectable to the cooling path and the cooling loop, wherein in a first operational mode of the cryocooler device where the at least one thermal energy storage device is connected to the cooling loop where the heat to be removed at the input exceeds a cooling capacity of the cryocooler device, and a second operational mode where the at least one thermal energy storage device is connected to the cooling path where the heat to be removed is less than the cooling capacity of the cryocooler and the heat is removed from the at least one thermal energy storage device.

公开(公告)号：US11817752B2

公开(公告)日：2023-11-14

申请号：US17366275

申请日：2021-07-02

Applicant: Hamilton Sundstrand Corporation

Inventor： Tod Policandriotes ,  Parag M. Kshirsagar ,  Suman Dwari ,  Beata I. Wawrzyniak ,  Jagadeesh Kumar Tangudu ,  Sreenivasa R. Voleti

IPC: H02K16/04 ,  H02K1/32

CPC classification number: H02K16/04 ,  H02K1/32

Abstract: Provided are embodiments for a method and a hybrid axial/radial motor. Embodiments can include a central rotor that includes an axial segment, a first radial segment, and a second radial segment, wherein the first radial segment extends axially from a first side of the axial segment and the second radial segment extends axially from a second side of the axial segment, wherein the first side is opposite the second side. Embodiments can also include a stator adapted to receive the first radial segment or the second radial segment of the central rotor.

公开(公告)号：US11288409B2

公开(公告)日：2022-03-29

申请号：US15920949

申请日：2018-04-30

Applicant: Hamilton Sundstrand Corporation

Inventor： Beata I. Wawrzyniak ,  Vivek Venugopalan ,  Parag M. Kshirsagar

IPC: G06F30/00 ,  G06N3/04 ,  G06F30/27 ,  G06N3/08 ,  G06F111/04 ,  G06F111/20

Abstract: An example method of designing an electrical machine includes providing at least one goal and at least one design constraint for a desired electrical machine to a deep neural network that comprises a plurality of nodes representing a plurality of prior electrical machine designs, the plurality of nodes connected by weights, each weight representing a correlation strength between two nodes. A proposed design is generated from the deep neural network for an electrical machine based on the goal(s) and design constraint(s). A plurality of the weights are adjusted based on a reward that rates at least one aspect of the proposed design. The proposed design is modified using the deep neural network after the weight adjustment. The adjusting and modifying are iteratively repeated to generate subsequent iterations of the proposed design, each subsequent iteration based on the reward from a preceding iteration. A system for designing electrical machines is also disclosed.

公开(公告)号：US20200028448A1

公开(公告)日：2020-01-23

申请号：US16038451

申请日：2018-07-18

Applicant: Hamilton Sundstrand Corporation

Inventor： Parag M. Kshirsagar

IPC: H02M7/5387 ,  H02M7/49 ,  H02M7/487

Abstract: The embodiments include a method for operating and a circuit for H-type multilevel power converter. The embodiments include power supply voltage rails and a neutral point, and a DC link capacitor coupled to the power supply voltage rails. Also the embodiments include an H-bridge switching network, wherein the H-bridge switching network is coupled to the power supply voltage rails, the neutral point and an output inverter stage, and the output inverter stage, wherein the output inverter stage comprises one or more pairs of switches that are coupled to an output phase and are configured to operate in a complementary mode.

公开(公告)号：US10266251B2

公开(公告)日：2019-04-23

申请号：US14993730

申请日：2016-01-12

Applicant: HAMILTON SUNDSTRAND CORPORATION

Inventor： Derick S. Balsiger ,  Parag M. Kshirsagar ,  Xin Wu

IPC: B64C13/28 ,  G01D5/14 ,  G01D5/20

Abstract: An electromechanical actuator includes a ground arm, an output arm rotatable about an axis of rotation relative to the ground arm and a position sensing arrangement to determine an angular position of the output arm relative to the ground arm. The position sensing arrangement includes a position sensor fixed at the ground arm. The position sensor is configured to sense magnetic reluctance. A sensed portion is located at the output arm proximate to the position sensor. The sensed portion includes a geometric variation in an output arm surface configured to vary a magnetic reluctance sensed at the position sensor as a function of angular position of the output arm relative to the ground arm.

公开(公告)号：US11901750B2

公开(公告)日：2024-02-13

申请号：US17342221

申请日：2021-06-08

Applicant: Hamilton Sundstrand Corporation

Inventor： Yongduk Lee ,  Xin Wu ,  Bo Liu ,  Parag M. Kshirsagar

IPC: H02J7/00 ,  B64D41/00

CPC classification number: H02J7/0029 ,  B64D41/00 ,  H02J7/0013 ,  B64D2221/00

Abstract: Systems for a current limiting circuit are provided. Aspects include a first set of batteries coupled to a battery terminal, a power converter coupled to a power converter terminal, wherein the battery terminal is coupled to the power converter terminal, a first current limiting circuit in series with the first set of batteries, wherein the current limiting circuit comprises a first circuit comprising a first transistor in series with a first diode, a second circuit comprising a second transistor in series with a second diode, a first RL circuit, wherein the first RL circuit, the first circuit, and the second circuit are arranged in parallel, a controller configured to operate the first current limiter in a plurality of modes including a battery discharge mode including the controller operating the first transistor in an off state, and operating the second transistor in a switching state.

公开(公告)号：US20230422452A1

公开(公告)日：2023-12-28

申请号：US17847769

申请日：2022-06-23

Applicant: Hamilton Sundstrand Corporation

Inventor： Jin Lee ,  Yongduk Lee ,  Parag M. Kshirsagar

IPC: H05K7/20

CPC classification number: H05K7/20927 ,  H05K7/20409

Abstract: The present disclosure provides for cooling systems, assemblies and methods (e.g., for semiconductor devices; for refrigerant cooling; for cryogenic cooling). More particularly, the present disclosure provides for mini-channel cold plate cooling assemblies, systems and methods for semiconductor devices (e.g., wide-bandgap (WBG) power semiconductor devices), with the cooling assemblies, systems and methods utilizing three-dimensional adaptive flow-paths using bi-metal fins. The present disclosure provides for mini-channel cold plate cooling assemblies, systems and methods that may improve cooling performance and/or enable local cooling control. The present disclosure provides for bi-metal strips that operate as both the surface-temperature sensors and actuators without input energy. The bi-metal strips guide the coolant flow to a low-drag channel when the surface temperature is low, and guide the coolant flow to the near-surface channel when the surface temperature is high.

公开(公告)号：US20220393489A1

公开(公告)日：2022-12-08

申请号：US17342221

申请日：2021-06-08

Applicant: Hamilton Sundstrand Corporation

Inventor： Yongduk Lee ,  Xin Wu ,  Bo Liu ,  Parag M. Kshirsagar

IPC: H02J7/00 ,  B64D41/00

Abstract: Systems for a current limiting circuit are provided. Aspects include a first set of batteries coupled to a battery terminal, a power converter coupled to a power converter terminal, wherein the battery terminal is coupled to the power converter terminal, a first current limiting circuit in series with the first set of batteries, wherein the current limiting circuit comprises a first circuit comprising a first transistor in series with a first diode, a second circuit comprising a second transistor in series with a second diode, a first RL circuit, wherein the first RL circuit, the first circuit, and the second circuit are arranged in parallel, a controller configured to operate the first current limiter in a plurality of modes including a battery discharge mode including the controller operating the first transistor in an off state, and operating the second transistor in a switching state.