公开(公告)号：US20180123470A1

公开(公告)日：2018-05-03

申请号：US15564847

申请日：2016-04-11

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： John Godsk NIELSEN ,  Søren ANDERSEN ,  Lars HELLE ,  Duy Duc DOAN

IPC: H02M5/458 ,  H02M7/493 ,  H02P29/032 ,  H02P27/04 ,  H02J3/38 ,  F03D9/25

CPC classification number: H02M5/4585 ,  F03D9/255 ,  H02J3/386 ,  H02M7/493 ,  H02P27/00 ,  H02P27/04 ,  H02P29/02 ,  H02P29/032 ,  H02P2101/15 ,  H02P2201/03 ,  Y02E10/725 ,  Y02E10/76

Abstract: A method of controlling a full-scale converter system in which both the grid-side inverter unit and the generator-side inverter unit have a series-connection of parallel inverters and form a generator-side and grid-side voltage-center-point at a voltage level between the inverters connected in series. The voltage-center-points are electrically connected by a center-line conductor. Conversion operation with a de-rated maximum active power-output is performed in response to at least one of (i) the grid-side inverter and (ii) the generator-side inverter of the first converter-string being disabled, by disabling active power production of at least one of (i) the grid-side inverter and (ii) the generator-side inverter of the second converter-string, or correspondingly reducing active power production of the second converter-string, thereby preventing a compensation current along the center-line conductor.

公开(公告)号：US20180006593A1

公开(公告)日：2018-01-04

申请号：US15540288

申请日：2015-05-11

Applicant: Mitsubishi Electric Corporation

Inventor： Masutaka WATANABE ,  Keiichi ENOKI ,  Yasukazu MURATA ,  Yoshimasa NISHIJIMA ,  Shingo HARADA

IPC: H02P25/22 ,  H02P27/08 ,  H02P23/30

CPC classification number: H02P25/22 ,  H02P5/74 ,  H02P23/30 ,  H02P27/08 ,  H02P2201/03

Abstract: An AC-rotating-electric-machine control apparatus includes two or more electric-power conversion circuits that control respective voltages to be applied to the two or more groups of multi-phase armature windings, for each of the two or more groups of multi-phase armature windings; each of the two or more electric-power conversion circuits has two or more switching devices for opening or closing the corresponding group of multi-phase armature windings, for each of the phases; the two or more switching devices are switching-controlled in such a way that opening operation or duty control can be applied to the corresponding group of multi-phase armature windings.

公开(公告)号：US20170373626A1

公开(公告)日：2017-12-28

申请号：US15193302

申请日：2016-06-27

Applicant: General Electric Company

Inventor： Harold Robert Schnetzka ,  Allen Michael Ritter ,  Robert Gregory Wagoner ,  Daniel E. Jordy

IPC: H02P9/10 ,  H02K7/18 ,  H02P9/00 ,  H02P101/15

CPC classification number: H02P9/102 ,  F03D9/255 ,  H02J3/386 ,  H02J2003/001 ,  H02K7/183 ,  H02P9/006 ,  H02P9/007 ,  H02P2101/15 ,  H02P2201/03 ,  H03K17/166 ,  H03K17/168 ,  Y02E10/763

Abstract: Systems and methods for controlling operation of a power converter based on grid conditions are provided. In particular, a first gating voltage can be applied to a switching element of a power converter associated with a wind-driven power generation system. The first gating voltage can be greater than a threshold voltage for the switching element. A grid event associated with an electrical grid coupled to the power generation system can be detected. A second gating voltage can be applied to the gate of the switching element during the detected grid event. The second gating voltage can be greater than the first gating voltage.

公开(公告)号：US20170366127A1

公开(公告)日：2017-12-21

申请号：US15542834

申请日：2015-11-27

Applicant: SIMEMENS AKTIENGESELLSCHAFT

Inventor： IOANNIS TSOUMAS

IPC: H02P23/02

CPC classification number: H02P23/02 ,  H02P27/06 ,  H02P2201/03

Abstract: A method and a control device for regulating a drive device includes an electric motor with a motor shaft and a converter for supplying power to the electric motor. To this end, measured values of measured variables, which characterize a power loss of the drive device, are detected and a converter output voltage is adjusted depending on the detected measured values in such a way that the power loss decreases.

公开(公告)号：US09847733B2

公开(公告)日：2017-12-19

申请号：US15152961

申请日：2016-05-12

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Ahmed Mohamed Sayed Ahmed ,  Prathamesh R. Vadhavkar ,  Brian J. Seibel

IPC: H02M5/45 ,  H02M5/458 ,  H02M1/08 ,  H02P23/00 ,  H02P27/06 ,  H02M5/42 ,  H02M5/453

CPC classification number: H02M5/4585 ,  H02M1/08 ,  H02M1/32 ,  H02M5/42 ,  H02M5/453 ,  H02M5/458 ,  H02M2001/325 ,  H02P23/0004 ,  H02P27/06 ,  H02P29/00 ,  H02P2201/03

Abstract: Power conversion systems and methods are provided for ride through of abnormal grid conditions or disturbances, in which a system rectifier is operated in a first mode to regulate a DC voltage of an intermediate DC circuit, an inverter is operated in the first mode to convert DC power from the intermediate DC circuit to provide AC output power to drive a load. In response to detecting an abnormal grid condition, the system changes to a second mode in which the rectifier is turned off and the inverter regulates the DC voltage of the intermediate DC circuit using power from the load.

公开(公告)号：US09621081B2

公开(公告)日：2017-04-11

申请号：US14978697

申请日：2015-12-22

Applicant: MAKITA CORPORATION

Inventor： Yuki Kawai ,  Yoshitaka Ichikawa ,  Hirokatsu Yamamoto ,  Ying Yang

IPC: H02P27/04 ,  H02P6/00 ,  H02P6/14 ,  H02P27/08 ,  H02P6/15

CPC classification number: H02P6/157 ,  H02P6/085 ,  H02P6/14 ,  H02P27/08 ,  H02P2201/03

Abstract: A motor-driven apparatus in one aspect of the present disclosure includes: a brushless motor; a full-wave rectifier circuit; a drive circuit; a controller; and a forcible stop unit. The forcible stop unit performs a forcible stop control to temporarily forcibly stop a switching operation of a plurality of switching elements during a stop period when a full-wave rectified voltage is smaller than an induced voltage generated by a plurality of coils, and the switching operation of the plurality of switching elements is to be stopped.

公开(公告)号：US20160380571A1

公开(公告)日：2016-12-29

申请号：US15183881

申请日：2016-06-16

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02P27/06 ,  H02M5/42

CPC classification number: H02H7/1216 ,  H02M7/062 ,  H02P2201/03

Abstract: A motor driving device includes: a converter that converts AC power into DC power; a DC link capacitor provided for the DC link; an inverter that converts DC power into AC power for a motor; an initial charging circuit that charges the DC link capacitor; a potential difference determination unit that determines a potential difference between both ends of the initial charging circuit; a direct current detecting unit that detects direct current supplied to the initial charging circuit; an alternating current detecting unit that detects alternating current supplied to a motor; and an abnormality determination unit that determines that abnormal heat generation occurs in the initial charging circuit when the alternating current detecting unit detects alternating current and the direct current detecting unit detects direct current, in a case in which a potential difference occurs between both of the ends of the initial charging circuit.

Abstract translation: 电动机驱动装置包括：将交流电转换为直流电力的转换器; 为DC链路提供的DC链路电容器; 将直流电力转换为电动机的交流电源的逆变器; 初始充电电路，对直流链路电容器充电; 电位差确定单元，确定初始充电电路的两端之间的电位差; 直流电流检测单元，其检测提供给初始充电电路的直流电流; 交流电流检测单元，其检测供应给电动机的交流电; 以及异常判定单元，在所述交流电流检测单元检测到交流电流并且所述直流电流检测单元检测到直流电流的情况下，判断在所述初始充电电路中发生异常发热的情况， 的初始充电电路。

公开(公告)号：US20160226427A1

公开(公告)日：2016-08-04

申请号：US15008578

申请日：2016-01-28

Applicant: FANUC CORPORATION

Inventor： Koujirou Sakai ,  Shinichi Horikoshi

IPC: H02P27/08

CPC classification number: H02P27/08 ,  H02M1/32 ,  H02M5/12 ,  H02M5/4585 ,  H02P2201/03

Abstract: A motor drive of an embodiment of the present invention includes a PWM converter for converting AC power inputted from a low voltage AC power source into DC power by PWM control, an inverter for converting the received DC power to AC power to drive a motor, and a capacitor connected between the PWM converter and the inverter. The PWM converter is operated so as to limit input and output currents or input and output power to predetermined values, and supplied from the low voltage AC power source with a lower voltage than a voltage required to drive the motor. The PWM converter boosts a DC link voltage being an output voltage to the voltage able to drive the motor, and thereby serves to increase the potential difference of the capacitor between charged and discharged states to reduce the capacitance of the capacitor.

Abstract translation: 本发明的实施例的电动机驱动器包括：PWM转换器，用于通过PWM控制将从低压交流电源输入的交流电力转换成直流电;逆变器，用于将接收到的直流电力转换为交流电力以驱动电动机;以及 连接在PWM转换器和逆变器之间的电容器。 PWM转换器的工作原理是将输入和输出电流或输入和输出功率限制在预定值，并从低压交流电源提供的电压低于驱动电机所需的电压。 PWM转换器将作为输出电压的DC链路电压提升到能够驱动电动机的电压，从而用于增加电容器在充电和放电状态之间的电位差，以减小电容器的电容。

公开(公告)号：US20160190960A1

公开(公告)日：2016-06-30

申请号：US14978697

申请日：2015-12-22

Applicant: MAKITA CORPORATION

Inventor： Yuki KAWAI ,  Yoshitaka ICHIKAWA ,  Hirokatsu YAMAMOTO ,  Ying YANG

IPC: H02P6/00 ,  H02P6/14

CPC classification number: H02P6/157 ,  H02P6/085 ,  H02P6/14 ,  H02P27/08 ,  H02P2201/03

Abstract: A motor-driven apparatus in one aspect of the present disclosure includes: a brushless motor; a full-wave rectifier circuit; a drive circuit; a controller; and a forcible stop unit. The forcible stop unit performs a forcible stop control to temporarily forcibly stop a switching operation of a plurality of switching elements during a stop period when a full-wave rectified voltage is smaller than an induced voltage generated by a plurality of coils, and the switching operation of the plurality of switching elements is to be stopped.

Abstract translation: 本公开的一个方面的电动驱动装置包括：无刷电动机; 全波整流电路; 驱动电路; 控制器 和强制停机单元。 强制停止单元执行强制停止控制，以在全波整流电压小于由多个线圈产生的感应电压的停止期间临时强制停止多个开关元件的开关动作，并且开关动作 要停止多个开关元件。

公开(公告)号：US20160072422A1

公开(公告)日：2016-03-10

申请号：US14841864

申请日：2015-09-01

Applicant: FANUC CORPORATION

Inventor： Wataru Kuroki

IPC: H02P27/04

CPC classification number: H02M1/36 ,  H02J1/00 ,  H02M1/32 ,  H02M5/4585 ,  H02M7/219 ,  H02P2201/03

Abstract: An electric motor drive apparatus includes: an AC/DC converter converting AC into DC by the switching of multiple power devices; a control circuit performing PWM switching control of the multiple power devices; a current detecting circuit that detects input current from the AC power supply to the AC/DC converter; an electromagnetic contactor connecting or cutting off power from the AC power supply to the AC converter; and a DC link unit including a smoothing capacitor for smoothing DC voltage, and is constructed such that the control circuit determines that the electromagnetic contactor has been welded when input current is detected in a condition where with the DC link unit having been charged, the electromagnetic contactor is turned off to cut off the power from the AC power supply to the AC/DC converter and the multiple power devices are controlled by PWM switching in accordance with the switching commands.

Abstract translation: 电动机驱动装置包括：通过多个功率器件的切换将AC转换成DC的AC / DC转换器; 执行所述多个功率器件的PWM开关控制的控制电路; 检测从AC电源向AC / DC转换器的输入电流的电流检测电路; 连接或切断来自AC电源到AC转换器的电力的电磁接触器; 以及包括用于平滑直流电压的平滑电容器的直流链路单元，并且被构造成使得当控制电路在具有被充电的直流链路单元的状态下检测到输入电流时，确定电磁接触器已被焊接，电磁 关闭接触器，以切断AC / DC转换器的交流电源的电源，并根据切换命令通过PWM切换控制多个功率器件。