公开(公告)号：US20180212545A1

公开(公告)日：2018-07-26

申请号：US15834304

申请日：2017-12-07

Applicant: General Electric Company

Inventor： Fei XU ,  Kum-Kang HUH ,  Ahmed ELASSER ,  Mohammed AGAMY

IPC: H02P27/06 ,  H02M3/158

CPC classification number: H02P27/06 ,  H02M3/158 ,  H02M3/1582 ,  H02M2001/0058 ,  H02P2201/09 ,  H02P2201/11 ,  Y02B70/1491

Abstract: Systems and methods are provided for a soft switching topology for a direct current (DC)-DC converter. The systems and methods determine an operational status of an electric motor, and activate at least one of an upper or lower first or second semiconductor switches based on an operation of the electric motor. The first and second switching circuits are conductively coupled to a power inverter circuit. The systems and methods include deliver an adjusted voltage to one of the power inverter circuit or a power circuit based on the operational status of the electric motor.

公开(公告)号：US20180367051A1

公开(公告)日：2018-12-20

申请号：US16061717

申请日：2016-01-15

Applicant: General Electric Company

Inventor： Mohammed AGAMY ,  Dong DONG ,  Yan PAN ,  Luis Jose GARCES

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/088

CPC classification number: H02M3/33584 ,  H02M1/088 ,  H02M3/3376 ,  H02M2001/0058 ,  H02M2001/348 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A direct current (DC) to DC power converter includes a first bus converter for converting a first DC bus voltage into a first high frequency AC voltage and a second bus converter for converting a second high frequency alternating current (AC) voltage into a second DC bus voltage. The DC to DC converter also includes a resonant circuit for coupling the first bus converter and the second bus converter and a controller for providing switching signals to the first bus converter and the second bus converter to operate the power converter in a soft switching mode. The controller includes a switching frequency controller for determining a switching frequency signal for the power converter based on a reference output current and a phase shift controller for determining a phase shift signal for the power converter. When the reference output current is lower than the a first load current value the switching frequency signal is maintained at a first switching frequency and the phase shift is determined according to the reference output current. Further, when the reference output current is above a second load current value the switching frequency signal is maintained at a second switching frequency and the phase shift is determined according to the reference output current. When the reference output current is between the first load current value and the second load current value, the switching frequency signal is adjusted according to a value of the reference output current and the phase shift is determined based on the switching frequency, the reference output current and perturbations in the output current.

公开(公告)号：US20210159715A1

公开(公告)日：2021-05-27

申请号：US16614074

申请日：2018-05-30

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Mohammed AGAMY ,  Ramanujam RAMABHADRAN ,  Kenneth McClellan RUSH ,  Luca TONINI ,  Ahmed ELASSER ,  Herman Lucas Norbert WIEGMAN

IPC: H02J7/00 ,  H02J1/10

Abstract: Controlling an energy storage system includes providing one or more constraints to an optimization problem algorithm, determining by the optimization problem algorithm a DC bus voltage value that results in an minimum total power dissipation for the plurality of power converters, calculating a respective control variable for each of the respective plurality of power converters based on the determined DC bus voltage value, and generating control processor executable instructions to implement control of each of the plurality of power converters to achieve the calculated respective control variable. A system for implementing the method and a non-transitory computer-readable medium are also disclosed.