公开(公告)号：US20230142063A1

公开(公告)日：2023-05-11

申请号：US17916342

申请日：2020-03-31

Applicant: General Electric Company

Inventor： Zhi ZHOU ,  Steve MANKEVICH ,  Michael DOUCETTE ,  Anthony MARTIN, II

IPC: H01F27/12 ,  H01F27/24 ,  H01F27/30 ,  H02M5/458 ,  H02M1/00 ,  H05K7/20 ,  H02M7/00

CPC classification number: H01F27/12 ,  H01F27/24 ,  H01F27/306 ,  H02M5/458 ,  H02M1/0067 ,  H05K7/20927 ,  H02M7/003

Abstract: A high power-density power converter (500) employs a liquid cooling system (200) to cool its transformers (120). In an embodiment, the coils (135) of a transformer (100) are embedded in a heat-conducting solid (epoxy or resin). The resin-embedded coils (135) are in physical/thermal contact with cold plates (160), which are sandwiched between the coils (135) and/or in contact with exterior surfaces of the coils (135). The cold plates (160) may additionally or alternatively be in physical/thermal contact with the transformer core (145). Coolant fluid is pumped through the cold plates (160). In another embodiment, the transformer is (120) is immersed in a coolant fluid (740), such as oil, within a heat management enclosure (710). Cold plates (160) are in physical/thermal contact with the enclosure (710). Coolant liquid (240) pumped through the cold plates (160) conducts heat away from the oil-enclosed transformer (700).

公开(公告)号：US20180269775A1

公开(公告)日：2018-09-20

申请号：US15762130

申请日：2015-10-02

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Tomas SADILEK ,  Di ZHANG ,  Zhi ZHOU ,  Dong DONG

IPC: H02M1/12 ,  H02M7/483

Abstract: Systems and methods to improve operation of a modular multilevel converter. Some embodiments include a first upper arm with a first active power link module, which facilitates producing a first portion of a first alternating current electrical power at a base frequency and injecting a first even-order current harmonic of the base frequency in the first upper arm, and a first lower arm with a second active power link module, which facilitates producing a second portion of the first alternating current, in which the first portion of the first alternating current and the second portion of the alternating current are combined to facilitate outputting the first alternating current electrical power at a first alternating current terminal, and injecting the first even-order current harmonic in the first lower arm, in which magnitude of the first even-order current harmonic is zero at the first alternating current terminal.

公开(公告)号：US20170155253A1

公开(公告)日：2017-06-01

申请号：US15319501

申请日：2015-06-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Santosh Sambamoorthy VEDA ,  Robert Dean KING ,  Irene Michelle BERRY ,  Zhi ZHOU ,  Matthew Christian NIELSEN ,  Lembit SALASOO

IPC: H02J7/00 ,  H02J3/14 ,  H02J13/00 ,  H02J3/16

Abstract: A system includes a control unit having a processor and a communication interface. The communication interface is configured to communicate with one or more charging stations that are electrically coupled to receive electrical power from a power distribution grid and that are configured to selectively charge one or more energy storage devices connected to the charging stations. The processor is configured to generate first control signals for communication by the communication interface to the one or more charging stations to control transfer of reactive and/or active power from the charging stations to the power distribution grid. The control signals are generated based at least in part on a load cycle profile of one or more electric machines electrically coupled to the power distribution grid.