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：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.