公开(公告)号：US20240039415A1

公开(公告)日：2024-02-01

申请号：US17874545

申请日：2022-07-27

申请人： Caterpillar Inc.

发明人： Jyothiraditya Ramaswamy ,  Yingying Kuai ,  Gholamreza Esmaili

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33584 ,  H02M1/0058

摘要： A fundamental harmonic matching control technique (FHMT) can optimize the use of the switching devices needed to operate a dual active bridge DC/DC converter, which reduces the peak and RMS currents thereby reducing the switching power losses. The FHMT control techniques can also reduce the current rating of the switching devices, transformer, and the inductor of the dual active bridge DC/DC converter.

公开(公告)号：US20240164071A1

公开(公告)日：2024-05-16

申请号：US17984505

申请日：2022-11-10

申请人： Caterpillar, Inc.

发明人： Michael R. Garrabrant ,  Luke A. Ketcham ,  Yingying Kuai ,  Matthew Ernest Williams ,  Suudharshana Madhavann

IPC分类号： H05K7/20 ,  H02M3/10 ,  H05K1/02 ,  H05K7/14

CPC分类号： H05K7/20927 ,  H02M3/10 ,  H05K1/0203 ,  H05K7/1432 ,  H05K7/209

摘要： An assembly for two (or more) DC/DC converters located in a common enclosure, where the DC/DC converters share a heat sink assembly, such as a shared dual-sided heat sink assembly. The techniques efficiently package the components of the DC/DC converters within a common enclosure and simplify the cooling lines routed to those components.

公开(公告)号：US09991820B2

公开(公告)日：2018-06-05

申请号：US15061591

申请日：2016-03-04

申请人： Caterpillar Inc.

发明人： Yingying Kuai

IPC分类号： H02M7/5387 ,  H02M7/483

CPC分类号： H02M7/5387 ,  H02M7/483 ,  H02M2007/4835

摘要： A multi-level converter is provided. The multi-level converter may include a plurality of direct current (DC) sources coupled in series to form a DC link, and at least one phase circuit coupled in parallel to the DC link. The phase circuit may include at least one flying capacitor, at least one output node, a first set of switching devices selectively coupling the flying capacitor to one or more of the DC sources at a first frequency, and a second set of switching devices selectively coupling the flying capacitor to the output node at a second frequency.

公开(公告)号：US09951497B2

公开(公告)日：2018-04-24

申请号：US15137916

申请日：2016-04-25

申请人： Caterpillar Inc.

发明人： Xinyu Ge ,  Baojun Si ,  Yingying Kuai

IPC分类号： B60K5/00 ,  E02F9/20 ,  E02F3/64 ,  E02F3/65

CPC分类号： E02F9/2062 ,  E02F3/6409 ,  E02F3/652 ,  E02F9/2091 ,  E02F9/2095

摘要： A hybrid power train system for a tractor scraper is provided. The hybrid power train system may include a primary power source coupled to a first set of traction devices, a generator coupled to the primary power source, a first electric motor coupled to a second set of traction devices, an inverter circuit coupled to the generator and the first electric motor, an energy storage device coupled to the inverter circuit, and a controller operatively coupled to the inverter circuit. The controller may be configured to engage a first operation mode enabling electrical energy, supplied by the generator and the first electric motor, to be stored in the energy storage device, and engage a second operation mode enabling electrical energy, stored in the energy storage device, to be supplied to the first electric motor to drive the second set of traction devices.

公开(公告)号：US12081133B2

公开(公告)日：2024-09-03

申请号：US17874545

申请日：2022-07-27

申请人： Caterpillar Inc.

发明人： Jyothiraditya Ramaswamy ,  Yingying Kuai ,  Gholamreza Esmaili

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33584 ,  H02M1/0058

摘要： A fundamental harmonic matching control technique (FHMT) can optimize the use of the switching devices needed to operate a dual active bridge DC/DC converter, which reduces the peak and RMS currents thereby reducing the switching power losses. The FHMT control techniques can also reduce the current rating of the switching devices, transformer, and the inductor of the dual active bridge DC/DC converter.

公开(公告)号：US20170306589A1

公开(公告)日：2017-10-26

申请号：US15137916

申请日：2016-04-25

申请人： Caterpillar Inc.

发明人： Xinyu Ge ,  Baojun Si ,  Yingying Kuai

IPC分类号： E02F9/20 ,  E02F3/65 ,  E02F3/64

CPC分类号： E02F9/2062 ,  E02F3/6409 ,  E02F3/652 ,  E02F9/2091 ,  E02F9/2095

摘要： A hybrid power train system for a tractor scraper is provided. The hybrid power train system may include a primary power source coupled to a first set of traction devices, a generator coupled to the primary power source, a first electric motor coupled to a second set of traction devices, an inverter circuit coupled to the generator and the first electric motor, an energy storage device coupled to the inverter circuit, and a controller operatively coupled to the inverter circuit. The controller may be configured to engage a first operation mode enabling electrical energy, supplied by the generator and the first electric motor, to be stored in the energy storage device, and engage a second operation mode enabling electrical energy, stored in the energy storage device, to be supplied to the first electric motor to drive the second set of traction devices.

公开(公告)号：US20170256950A1

公开(公告)日：2017-09-07

申请号：US15061591

申请日：2016-03-04

申请人： Caterpillar Inc.

发明人： Yingying Kuai

IPC分类号： H02J3/38

CPC分类号： H02M7/5387 ,  H02M7/483 ,  H02M2007/4835

摘要： A multi-level converter is provided. The multi-level converter may include a plurality of direct current (DC) sources coupled in series to form a DC link, and at least one phase circuit coupled in parallel to the DC link. The phase circuit may include at least one flying capacitor, at least one output node, a first set of switching devices selectively coupling the flying capacitor to one or more of the DC sources at a first frequency, and a second set of switching devices selectively coupling the flying capacitor to the output node at a second frequency.