公开(公告)号：US20190190263A1

公开(公告)日：2019-06-20

申请号：US16252636

申请日：2019-01-20

申请人： GUANGDONG UNIVERSITY OF TECHNOLOGY

发明人： Sizhe CHEN ,  Jiahao LU ,  Guidong ZHANG ,  Yuanmao YE ,  Yun ZHANG ,  Miao ZHANG

IPC分类号： H02J3/02 ,  H02M1/32

CPC分类号： H02J3/02 ,  H02M1/32 ,  H02M2001/325

摘要： A fault ride-through circuit with a variable frequency transformer (VFT) and a control method thereof are provided, and the control method comprises: pretreating acquired voltages of grids, a voltage of a stator interface and a voltage of a rotor interface to obtain a rotor voltage DC component and a rotor voltage DC component; testing and treating a voltage frequency of a first grid and a voltage frequency of a second grid; carrying out a reference voltage calculation for a stator voltage DC component, a rotor voltage DC component, the voltage frequencies of the first grid and the second grid to obtain a positive voltage reference value of the first PWM convertor and the second PWM convertor, and processing the voltage reference values to obtain the switch signals for controlling the first PWM convertor and the second PWM convertor.

公开(公告)号：US20190181773A1

公开(公告)日：2019-06-13

申请号：US16277030

申请日：2019-02-15

申请人： Murata Manufacturing Co., Ltd.

发明人： Koji Kawai

IPC分类号： H02M7/219 ,  H02M7/08 ,  H02J9/06 ,  H02M3/155 ,  H02J3/38 ,  H02J1/10

CPC分类号： H02M7/219 ,  H02J1/102 ,  H02J3/38 ,  H02J9/061 ,  H02M3/155 ,  H02M7/08 ,  H02M7/12 ,  H02M7/17 ,  H02M2001/0048 ,  H02M2001/007 ,  H02M2001/0074 ,  H02M2001/0077 ,  H02M2001/325

摘要： A power supply system that includes a converter that converts an input alternating-current voltage into a direct-current voltage and outputs the direct-current voltage to a load. The system includes a switcher that electrically connects one of multiple alternating-current power supplies to the converter, a voltage detector that detects an input voltage input to the converter, and a current detector that detects an output current output from the converter. The switcher repeats, for a predetermined amount of time, a determination of whether there is an abnormality in alternating-current power supply based on the input voltage detected by the voltage detector. Moreover, if there is an abnormality, the switcher switches which alternating-current power supply is connected to the converter. Further, the switcher adjusts, based on the result of detection by the current detector, the amount of time for which the determination is performed.

公开(公告)号：US20190081573A1

公开(公告)日：2019-03-14

申请号：US16084438

申请日：2017-02-20

申请人： Siemens Aktiengesellschaft

发明人： Manuel Blum ,  Marek Galek ,  Alexander Hofmann ,  Dirk Malipaard ,  Benjamin Ruccius

IPC分类号： H02M7/483 ,  H02M7/00 ,  H02M1/32

CPC分类号： H02M7/7575 ,  H02M7/10 ,  H02M7/219 ,  H02M7/483 ,  H02M2001/0003 ,  H02M2001/325 ,  H02M2007/4835

摘要： Some embodiments may include a multi-stage converter comprising: a branch connected between a positive busbar and a negative busbar; and a control device. The branch has two arms connected in series. The arms each comprise a series circuit including a plurality of two-pole submodules, an energy store, and a communication connection to the control device. The communication connection transmits state of charge of the energy store and a switching instruction for the respective submodule. For at least a subset of the submodules, the communication connection comprises a common communication connection with a plurality of insulation paths having an insulation capability in each case of at most 5 kV.

公开(公告)号：US20180331569A1

公开(公告)日：2018-11-15

申请号：US15595183

申请日：2017-05-15

申请人： VERTIV SRL

发明人： Stefano PECORARI ,  Andrea PETTENO ,  Livio TILOTTA ,  Luigi BALMA

IPC分类号： H02J9/06 ,  H02M1/32 ,  H02H3/28

CPC分类号： H02J9/062 ,  H02H3/283 ,  H02H9/002 ,  H02J9/061 ,  H02M1/32 ,  H02M1/36 ,  H02M2001/325

摘要： A system and method is presented for lowering inrush current to an uninterruptible power supply. During a startup phase, an AC voltage is applied to the secondary winding of a transformer interposed between an input power supply and a rectifier. An active rectifier coupled to the secondary winding of the transformer is operated as an inverter and supplies the voltage to the secondary winding of the transformer during the startup phase. The magnitude of the AC voltage applied to the secondary winding of the transformer is initially less than the magnitude of the input voltage and is increased gradually over time until it reaches the magnitude of the AC input voltage. In this way, the magnetizing flux of the transformer is increased from zero to a steady-state without having the transformer saturate.

公开(公告)号：US20180316259A1

公开(公告)日：2018-11-01

申请号：US15960595

申请日：2018-04-24

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Shintaro TSUJII

IPC分类号： H02M1/32 ,  H02P27/08 ,  H02M3/158 ,  H02M1/36 ,  B60L11/18 ,  H02P29/024 ,  B60L3/00

CPC分类号： H02M1/32 ,  B60L3/0023 ,  B60L50/51 ,  H02M1/36 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0009 ,  H02M2001/325 ,  H02P27/08 ,  H02P29/024 ,  H02P29/0241 ,  H02P2201/07

摘要： When an abnormality occurs in a first voltage sensor that detects a voltage of a power line on a high voltage side or a second voltage sensor that detects a voltage of a power line on a low voltage side, an estimated voltage of the power line on the high voltage side is calculated based on a detected current of a reactor that is detected by a current sensor that detects a current of the reactor as the detected current, and a step-up converter is controlled using the estimated voltage of the power line on the high voltage side.

公开(公告)号：US20180294721A1

公开(公告)日：2018-10-11

申请号：US15767409

申请日：2016-09-08

申请人： AutoNetworks Technologies, Ltd. ,  Sumitomo Wiring Systems, Ltd. ,  SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Takenori Abe

IPC分类号： H02M3/158 ,  H02M1/08 ,  H02M1/14

CPC分类号： H02M3/158 ,  H02M1/08 ,  H02M1/14 ,  H02M1/32 ,  H02M1/36 ,  H02M3/155 ,  H02M3/1588 ,  H02M2001/325 ,  H02M2003/1586 ,  Y02B70/1466

摘要： A multiphase converter is provided with a multiphase conversion unit including a plurality of voltage conversion units; and a control unit configured to individually control the voltage conversion units using control signals. The control unit performs soft start control on the voltage conversion units by offsetting the time periods for individual voltage conversion units against each other. A detection unit detects a value reflecting an output current or an output voltage on a common output path from the plurality of voltage conversion units. The abnormality identifying unit identifies the abnormal voltage conversion unit or the abnormal group of voltage conversion units that generates an abnormal current or an abnormal voltage based on a result of detection by the detection unit during the time periods in which the soft start control is performed.

公开(公告)号：US20180278146A1

公开(公告)日：2018-09-27

申请号：US15762430

申请日：2016-09-21

申请人： SCHLUMBERGER TECHNOLOGY CORPORATION

发明人： Mustafa Kamil Guven ,  Yaoxin Qian ,  In Chul Jang ,  John Parry

IPC分类号： H02M1/32 ,  H02P29/028 ,  E21B4/02 ,  E21B4/04 ,  E21B41/00

CPC分类号： H02M1/32 ,  E21B4/02 ,  E21B4/04 ,  E21B7/04 ,  E21B41/0085 ,  H02M7/5387 ,  H02M7/797 ,  H02M2001/325 ,  H02P27/04 ,  H02P27/06 ,  H02P29/028 ,  H02P29/032

摘要： A fault tolerant inverter or controlled rectifier system includes a first leg having at least one switch device, a spare leg having at least one spare switch device, a spare leg connect switch associated with the spare leg and the first leg, a fault detection sub-system for detecting a fault in the first leg and outputting a signal on detection of a fault in the first leg, and a leg selection control sub-system that receives the signal output by the fault detection sub-system and controls the operation of the spare leg connect switch in accordance with the output signal, such that on detection of a fault the spare leg may be activated to take over the operation of the first leg.

公开(公告)号：US20180269777A1

公开(公告)日：2018-09-20

申请号：US15544077

申请日：2016-12-26

申请人： Shenzhen Yinamic Technology Co., Ltd.

发明人： Jun XIE

IPC分类号： H02M1/32 ,  H02M1/36 ,  H02M7/5387

CPC分类号： H02M1/32 ,  H02M1/34 ,  H02M1/36 ,  H02M7/53871 ,  H02M2001/007 ,  H02M2001/325 ,  H02M2001/344

摘要： The present invention provides a power limiting circuit for inverter device and an inverter device, which pertains to the technical field of power source inverting. The inverter device comprises a first logic judging circuit for comparing an input current of an inverter circuit with a first preset current threshold and outputting a first signal when said input current is larger than the first preset current threshold; and a shunt circuit for shunting a portion of the input current of the inverter circuit when receiving said first signal; wherein, the shunt circuit comprises a shunt resistance and a first controllable switch, the shunt resistance and the first controllable switch are connected in series and then parallel-connected to input ends of the inverter circuit, a control end of the first controllable switch is connected to an output end of the first logic judging circuit for controlling the first controllable switch to be connected when receiving said first signal. This circuit enables the inverter device to be directly loaded with an inductive load, while an industrial frequency transformer can be dispensed with, so that the weight of the inverter device is greatly reduced, which allows the inverter device to be easy to move and carry around.

公开(公告)号：US20180217902A1

公开(公告)日：2018-08-02

申请号：US15741629

申请日：2016-10-28

申请人： Shanghai Maritime University

发明人： Tianzhen Wang ,  Zhuo Liu ,  Chao Geng ,  Jingang Han

IPC分类号： G06F11/16 ,  H02M7/5387 ,  G06F11/20

CPC分类号： G06F11/1604 ,  G06F11/20 ,  H02M7/49 ,  H02M7/53875 ,  H02M2001/325

摘要： The present invention discloses a voltage reference reconfiguration fault-tolerant control method for a cascaded multi-level inverter. The fault-tolerant method for the inverter automatically reconfigures the three-phase voltage amplitudes and phases of the three-phase total voltage in accordance with the fault diagnosis, thus realizing three-phase voltage balance. On the basis of the reconfiguration of the total voltage signal, re-reconfiguration of reference voltage inputted into the various H-bridges is conducted in accordance with the fault signal vectors, thereby realizing removal of the fault bridges and fault-tolerance of the normal bridges, while guaranteeing the integral sinusoidal characteristics of the actual reference voltage. The inverter realized maximum three-phase balanced line voltage in a fault occurrence, has the advantages of requiring no redundant modules and algorithms and the advantages of ease of removing fault bridges, and is applicable for reduced load operable electrical equipment.

公开(公告)号：US20180175744A1

公开(公告)日：2018-06-21

申请号：US15576492

申请日：2016-05-20

申请人： General Electric Technology GmbH

发明人： Omar Fadhel JASIM ,  David Reginald TRAINER

IPC分类号： H02M7/797 ,  H02M1/12 ,  H02M1/14

CPC分类号： H02M7/797 ,  H02M1/12 ,  H02M1/14 ,  H02M1/15 ,  H02M7/483 ,  H02M2001/0074 ,  H02M2001/325 ,  H02M2007/4835

摘要： A method of controlling a converter including DC terminals for connection to a DC network, the converter including a limb between the DC terminals, each limb including a phase element having switching elements and a AC terminal for connection to an AC network, the switching elements being configured to switch interconnecting a DC and AC side voltage; a sub-converter connected in series with the DC side of an electrical block and controllably become a first voltage source; and a sub-converter connected in parallel with the block, configured to controllably become a second voltage source. The method includes obtaining a DC side voltage and converter demand which the corresponding limb and converter track; determining a sub-converter voltage that each sub-converter must contribute to track the corresponding required DC side and converter voltage; controlling each sub-converter to achieve the corresponding determined voltage; and determining one or more optimal sub-converter voltages.