公开(公告)号：US11637429B2

公开(公告)日：2023-04-25

申请号：US16988401

申请日：2020-08-07

Applicant: Third Equation Ltd.

Inventor： Matthew Williams ,  Andrew Scobie

IPC: H02J3/28 ,  H01F29/14 ,  H02J3/01 ,  H02J3/18 ,  H02M5/10 ,  H02M5/27 ,  G05F1/335 ,  H02J1/14 ,  H02M5/16 ,  H02M5/04 ,  G05F1/325 ,  G05F1/33 ,  H01F38/04 ,  H02M5/451 ,  H02M5/297 ,  H02M5/42

Abstract: An electrical power distribution network includes: a plurality of electrical power control apparatuses, each of which include one or more signal conversion components receiving electrical power in the form of a first signal and generating a corresponding second signal, a controller that controls operation of the signal conversion components, electrical power generation components acting as sources of electrical power to at least some of the electrical power control apparatuses, and electrical power consumption components acting as sinks of electrical power from at least some of the electrical power control apparatuses. The electrical power control apparatuses operate autonomously but are interconnected so that the electrical power control apparatuses collectively maintain the voltages and frequencies of electrical power signals flowing through the electrical power distribution network at target values to compensate for variations in the sinks and/or sources of electrical power.

公开(公告)号：US11588396B2

公开(公告)日：2023-02-21

申请号：US16791593

申请日：2020-02-14

Applicant: Hamilton Sundstrand Corporation

Inventor： Adam Michael White ,  Dwight D. Schmitt

IPC: H02M1/32 ,  H02M5/04 ,  H02M1/00

Abstract: A method of operating a power conversion system including converting variable frequency AC voltage to constant frequency AC voltage by a power converter, setting a first peak current reset threshold above operating currents previously observed during steady state short circuit current regulation in by a controller of the power converter, setting a second peak current reset threshold at a current lower than the previously observed steady state short-circuit regulation point observed during previous operation during steady state short circuit current regulation by the controllers of the power converter, resetting inverter converter AC output regulating voltage to 0 volts, and ramping AC output regulating voltage back up into steady-state operation when the second a peak current reset threshold is exceeded.

公开(公告)号：US11539230B2

公开(公告)日：2022-12-27

申请号：US15807511

申请日：2017-11-08

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Chen Tian ,  Jialiang Zhang

IPC: H02J7/02 ,  G01R31/3842 ,  H02M3/335 ,  H02J7/00 ,  H02M7/217 ,  H02J7/06 ,  H02M1/08 ,  H02J7/04 ,  H02M7/06 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/44 ,  H02M1/44 ,  H02M5/04 ,  H02M7/04 ,  H02J7/24 ,  H02M1/00

Abstract: The present disclosure provides a charging system and method and a power adapter. The system includes: a battery; a first rectification unit, configured to output a voltage with a first pulsating waveform; a switch unit, configured to modulate the voltage with the first pulsating waveform; a transformer, configured to output a voltage with a second pulsating waveform according to the modulated voltage; a second rectification unit, configured to rectify the voltage with the second pulsating waveform to output a voltage with a third pulsating waveform; and a control unit, configured to output the control signal to the switch unit to decrease a length of a valley of the voltage with the third pulsating waveform such that a peak value of a voltage of the battery is sampled.

公开(公告)号：US11362595B1

公开(公告)日：2022-06-14

申请号：US17159039

申请日：2021-01-26

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Marius G. Chis ,  Zhong Y. Cheng ,  Navid R. Zargari

IPC: H02M5/04 ,  H02M1/32 ,  H02M1/36 ,  H02H9/02 ,  H02M5/10 ,  H02H1/04

Abstract: For power converter pre-charge with line synchronization, a method magnetizes a power transformer of a power converter with a supply voltage from a variable voltage variable frequency supply. The method pre-charges power cells of the power converter fed from the power transformer to a specified voltage with the supply voltage. The method further modifies a primary amplitude, a primary phase, and a primary frequency of a primary winding of the power converter with the supply voltage to match a main amplitude, a main phase, and a main frequency of a main voltage of a main power source. In response to matching the primary amplitude, the primary phase, and the primary frequency to the main amplitude, the main phase, and the main frequency, the method connects the main power source to the power transformer.

公开(公告)号：US10784689B2

公开(公告)日：2020-09-22

申请号：US15588902

申请日：2017-05-08

Applicant: General Electric Company

Inventor： Govardhan Ganireddy ,  Saurabh Shukla ,  Rajni Burra ,  Robert Gregory Wagoner ,  Anthony Michael Klodowski ,  Yashomani Kolhatkar

IPC: H02J3/01 ,  H02J3/38 ,  H02M5/04 ,  H02M1/12 ,  H02M5/42

Abstract: An electrical power system includes a cluster of electrical power subsystems, each of the electrical power subsystems including a power converter electrically coupled to a generator having a generator rotor and a generator stator. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid. The converter power path includes a partial power transformer. The electrical power system further includes a subsystem breaker configured with each of the electrical power subsystems, and a cluster transformer for connecting each cluster of electrical power subsystems to the power grid. The electrical power system further includes a cluster power path extending between each subsystem breaker and the cluster transformer, and a distortion filter electrically coupled to the cluster transformer. The distortion filter reduces harmonics in current flowing from the electrical power subsystems to the cluster transformer.

公开(公告)号：US10714963B2

公开(公告)日：2020-07-14

申请号：US16562690

申请日：2019-09-06

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Chen Tian ,  Jialiang Zhang

IPC: H02J7/00 ,  H02J7/02 ,  G01R31/3842 ,  H02M3/335 ,  H02J7/04 ,  H02M7/217 ,  H02J7/06 ,  H02M1/08 ,  H02M7/06 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/44 ,  H02M1/44 ,  H02M5/04 ,  H02M7/04 ,  H02M1/00 ,  H02J7/10

Abstract: Provided are a charging system, charging method, and device, said charging system comprising a battery; a first rectifier, configured to output a first voltage with a first pulsating waveform; a switch unit, configured to modulate the first voltage; a transformer, configured to output a second voltage with a second pulsating waveform; a second rectifier, configured to output a third voltage with a third pulsating waveform, and the third voltage is configured to be applied to the battery charge the battery; a first current sampling circuit, configured to sample current to obtain a current sampling value; and a control unit configured to output the control signal to the switch unit, adjust the amplification factor of the operational amplifier, and adjust a duty ratio of the control signal according to the current sampling value, such that the third voltage meets a charging requirement of the battery.

公开(公告)号：US10680441B2

公开(公告)日：2020-06-09

申请号：US16302314

申请日：2017-05-09

Applicant: GENERAL ELECTRIC TECHNOLOGY GMBH

Inventor： Antonios Tzimas ,  Guillaume Lucas ,  Kevin Dyke

IPC: H02J3/00 ,  H02J3/36 ,  H02M5/04

Abstract: The present invention provides methods and apparatus for controlling HVDC power transmission systems so as to increase the effective lifetime of cables carrying the DC power (and particularly the extruded polymer insulation of those cables). The method includes entering a maintenance mode in which the electrical properties applied to the cable are varied so as to facilitate diffusion of space charge accumulation in the extruded polymer insulation.

公开(公告)号：US10389164B2

公开(公告)日：2019-08-20

申请号：US15573445

申请日：2017-01-07

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Chen Tian ,  Jialiang Zhang

IPC: H02J7/04 ,  H02J7/02 ,  G01R31/3842 ,  H02M3/335 ,  H02J7/00 ,  H02M7/217 ,  H02J7/06 ,  H02M1/08 ,  H02M7/06 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/44 ,  H02M1/44 ,  H02M5/04 ,  H02M7/04 ,  H02M1/00 ,  H02J7/10

Abstract: Provided are a charging system, a protection method and a power adapter. The charging system comprises: a battery, a first rectification unit, a switch unit, a transformer, a second rectification unit), a voltage sampling circuit, a control unit, and a comparator unit. The first rectification unit outputs the voltage with the first pulsating waveform. The switch unit outputs the modulated voltage with the first pulsating waveform. The transformer outputs the voltage with the second pulsating waveform. The second rectification unit outputs the voltage with the third pulsating waveform. The control unit adjusts a duty cycle of a control signal, such that the voltage of a third pulsation waveform meets the charging requirement of the battery. The comparator unit applies a comparison signal to the switch unit when the voltage sampling value is greater than the reference voltage value, so as to control the switch unit to forcibly open.

公开(公告)号：US10381860B2

公开(公告)日：2019-08-13

申请号：US15573913

申请日：2017-01-07

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Chen Tian ,  Jialiang Zhang

IPC: H01M10/44 ,  H01M10/46 ,  H02J7/02 ,  G01R31/3842 ,  H02M3/335 ,  H02J7/00 ,  H02J7/04 ,  H02M7/217 ,  H02J7/06 ,  H02M1/08 ,  H02M7/06 ,  H01M10/0525 ,  H01M10/42 ,  H02M1/44 ,  H02M5/04 ,  H02M7/04 ,  H02M1/00 ,  H02J7/10

Abstract: An adapter and a charging control method are provided, the adapter includes: a power conversion unit, a voltage feedback unit, a current feedback unit, and a power adjusting unit. An input end of the power adjusting unit is coupled to an output end of the voltage feedback unit and an output end of the current feedback unit respectively, and an output end of the power adjusting unit is coupled to the power conversion unit. The power adjusting unit is configured to receive a voltage feedback signal and a current feedback signal, and to stabilize the output voltage and the output current of the adapter when the voltage feedback signal indicates that the output voltage of the adapter reaches a predetermined target voltage or when the current feedback signal indicates that the output current of the adapter reaches a predetermined target current.

公开(公告)号：US10236793B2

公开(公告)日：2019-03-19

申请号：US15612047

申请日：2017-06-02

Applicant: Tabuchi Electric Co., Ltd.

Inventor： Chienru Lung ,  Hideki Hidaka

IPC: H02M7/539 ,  H02M7/5395 ,  H02M5/04 ,  G05F1/67 ,  G05F1/70 ,  H02J3/38

Abstract: A grid connection power conversion device for connecting a distributed power supply to a three-phase commercial power system is provided. The power conversion device comprises an inverter, an instantaneous voltage detection circuitry to detect a maximum three-phase instantaneous voltage value of the commercial power system, a line voltage detection circuitry to detect a maximum value of each of three line voltages, an instantaneous voltage drop detection circuitry to detect an instantaneous voltage drop, and an output current control circuitry to control an output current value from the inverter. When the instantaneous voltage drop detection circuitry detects an instantaneous voltage drop, the output current control circuitry reduces the output current value from the inverter to an output current value corresponding to a minimum value among the four maximum voltage values which are the maximum three-phase instantaneous voltage value and the maximum values of the three line voltages.