公开(公告)号：US20240178646A1

公开(公告)日：2024-05-30

申请号：US18285405

申请日：2021-04-16

Applicant: Fanuc Corporation

Inventor： Sou Saito ,  Tsutomu Shikagawa

IPC: H02H1/00 ,  H02H7/08 ,  H02H7/122 ,  H02M7/00 ,  H02P1/02

CPC classification number: H02H1/0007 ,  H02H7/0822 ,  H02H7/1222 ,  H02M7/003 ,  H02P1/022 ,  H02P2201/03

Abstract: A motor drive device includes: a converter that converts AC power supplied from an AC power source into DC power and outputs the DC power to a DC link; a capacitor installed in the DC link; an inverter that converts the DC power at the DC link into AC power for driving a motor and outputs the AC power; a charging circuit that has a charging resistor for preventing inrush current during the period of pre-charging of the capacitor; a charging control unit that controls the pre-charging of the capacitor executed by the charging circuit; and an abnormality determination unit that determines, during the period of pre-charging of the capacitor, whether an abnormality has occurred, on the basis of a measurement value of the voltage of the capacitor and/or a measurement value of the current flowing through the DC link.

公开(公告)号：US11984829B2

公开(公告)日：2024-05-14

申请号：US17558866

申请日：2021-12-22

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Zeljko Jankovic ,  Ji Jun Cao

IPC: H02P27/06 ,  H02M7/483

CPC classification number: H02P27/06 ,  H02M7/4833 ,  H02P2201/01 ,  H02P2201/03

Abstract: A system has a DC bus circuit with first and second terminals, an intermediate node, first and second capacitors, first and second depletion mode FETs, and first and second switching control circuits, where the first depletion mode FET has a drain coupled to the first bus terminal, a source, and a gate coupled to the intermediate node, the second depletion mode FET has a drain coupled to the intermediate node, a source, and a gate coupled to the second bus terminal, the first switching control circuit turns the first depletion mode FET off responsive to a first capacitor voltage of the first bus capacitor being less than or equal to a second capacitor voltage of the second bus capacitor, and the second switching control circuit turns the second depletion mode FET off responsive to the first capacitor voltage being greater than or equal to the second capacitor voltage.

公开(公告)号：US20230302925A1

公开(公告)日：2023-09-28

申请号：US18110383

申请日：2023-02-16

Applicant: HONDA MOTOR CO., LTD.

Inventor： Jin Katsuya

IPC: B60L53/122 ,  H02P11/04

CPC classification number: B60L53/122 ,  H02P11/04 ,  B60L2210/30 ,  H02P2201/03 ,  H02P2101/45

Abstract: A power control device includes a power receiving unit, a power converting unit, and a control device. The power receiving unit includes a secondary coil that receives AC electric power transmitted from a power transmitting device in a non-contact manner. The power converting unit includes transistors with two phases as a pair connected to the secondary coil. The power converting unit converts the AC electric power received by the power receiving unit to DC electric power. The control device performs a synchronous rectification operation of rectifying the AC electric power by synchronously driving the transistors in two phases when a target output is equal to or greater than a target output. The control device controls the synchronous rectification operation and a short-circuiting operation of short-circuiting the secondary coil using the transistors in two phases through pulse frequency modulation when the target output is less than the predetermined value.

公开(公告)号：US20180278197A1

公开(公告)日：2018-09-27

申请号：US15712391

申请日：2017-09-22

Applicant: Kabushiki Kaisha Yaskawa Denki

Inventor： Tsutomu KUBO

IPC: H02P29/60

CPC classification number: H02P29/60 ,  G05B2219/37375 ,  G06N3/0445 ,  G06N3/0454 ,  G06N3/0472 ,  G06N3/082 ,  G06N3/084 ,  G06N7/005 ,  G06N20/10 ,  H02P29/032 ,  H02P2201/03 ,  H02P2205/00

Abstract: A motor control system includes a motor control apparatus, a motor, an environment state detector, and an operation state monitor. The motor control apparatus is configured to control feeding of driving power based on a control command. The motor is drivable by the driving power. The environment state detector is configured to detect environment state data of at least one of the motor control apparatus and the motor. The operation state monitor is configured to output, based on the environment state data, an operation margin of an operation state value of the at least one of the motor control apparatus and the motor relative to an operation rated value of the at least one of the motor control apparatus and the motor.

公开(公告)号：US09998060B2

公开(公告)日：2018-06-12

申请号：US15248544

申请日：2016-08-26

Applicant: Eaton Corporation

Inventor： Tony Tao ,  Xiaoling Li ,  Huaqiang Li

IPC: H02P27/06 ,  H02P29/024 ,  H02P27/08 ,  H02K17/30

CPC classification number: H02P29/024 ,  H02H1/00 ,  H02K17/30 ,  H02M1/00 ,  H02M1/32 ,  H02M5/458 ,  H02M2001/007 ,  H02M2001/322 ,  H02P3/22 ,  H02P27/08 ,  H02P2201/03

Abstract: An adjustable speed drive (ASD) circuit includes a rectifier bridge to convert an AC power input to a DC power, a DC link coupled to the rectifier bridge to receive the DC power, a DC link capacitor bank comprising at least first and second capacitors connected to the DC link, each capacitor having a capacitor voltage thereacross, and a protection circuit including a detection circuit configured to detect a short circuit on one or more of the first and second capacitors of the DC link capacitor bank and generate an action signal upon detection of a short circuit on one or more of the first and second capacitors of the DC link capacitor bank. The ASD circuit also includes an action circuit in operable communication with the detection circuit and configured to cause a short circuit across the DC link upon receiving the action signal from the detection circuit.

公开(公告)号：US09787084B2

公开(公告)日：2017-10-10

申请号：US15183881

申请日：2016-06-16

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02P27/04 ,  H02H7/12 ,  H02M7/06

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.

公开(公告)号：US20170074081A1

公开(公告)日：2017-03-16

申请号：US14939335

申请日：2015-11-12

Applicant: General Electric Company

Inventor： David Allan Torrey ,  Nathaniel Benedict Hawes

IPC: E21B43/12 ,  F04D13/08

CPC classification number: F04D13/08 ,  B01D17/0217 ,  B01D19/0057 ,  B01D21/267 ,  B01D45/12 ,  E21B43/128 ,  F04D13/10 ,  H02P5/74 ,  H02P6/15 ,  H02P6/16 ,  H02P2201/03

Abstract: A fluid extraction system is presented. The fluid extraction system includes a direct current (DC) bus and a plurality of fluid extraction sub-systems configured to be electrically coupled to the DC-bus. At least one fluid extraction sub-system includes an electric machine configured to aid in the extraction of a fluid from a well. The electric machine includes a plurality of phase windings and a rotor. The at least one fluid extraction sub-system further includes a control sub-system to control a rotational speed of the rotor by selectively controlling a supply of a phase current to the plurality of phase windings such that the rotational speed of the rotor of the electric machine is different from rotational speed of a rotor of another electric machine in at least one of other fluid extraction sub-systems. Related method for controlling rotational speeds of electric machines is also presented.

Abstract translation: 提出了一种流体萃取系统。 流体提取系统包括直流（DC）总线和被配置为电耦合到DC总线的多个流体抽出子系统。 至少一个流体提取子系统包括构造成有助于从井中提取流体的电机。 电机包括多个相绕组和转子。 所述至少一个流体提取子系统还包括控制子系统，以通过选择性地控制向所述多个相绕组的相电流的供应来控制所述转子的转速，使得所述电转子的转子的转速 机器不同于至少一个其它流体提取子系统中另一电机的转子的转速。 还提出了用于控制电机转速的相关方法。

公开(公告)号：US20170054301A1

公开(公告)日：2017-02-23

申请号：US15307566

申请日：2015-04-28

Applicant: GENERAL ELECTRIC TECHNOLOGY GMBH

Inventor： Georgios FINTZOS ,  Robert Stephen WHITEHOUSE ,  Carl David BARKER

IPC: H02J5/00 ,  H02M7/02 ,  H02M5/40 ,  H02J3/38

CPC classification number: H02J5/00 ,  H02J3/382 ,  H02J3/386 ,  H02J2003/365 ,  H02M5/40 ,  H02M7/02 ,  H02P9/102 ,  H02P2101/15 ,  H02P2201/01 ,  H02P2201/03 ,  Y02E10/763

Abstract: A wind farm side voltage source converter comprises a DC terminal for connection to a DC transmission link, an AC terminal for connection to a wind farm that includes at least one wind turbine, and a main controller. The main controller is configured to modify an active power demand (Pdemand) of the voltage source converter which is received from a higher level controller by introducing an artificial inertia factor and/or in response to a measured DC voltage (Vdc_msr) at the DC terminal.

Abstract translation: 风电场侧电压源转换器包括用于连接到DC传输链路的DC终端，用于连接到包括至少一个风力涡轮机的风电场的AC端子和主控制器。 主控制器被配置为通过引入人造惯性因子和/或响应于直流端的测量直流电压（Vdc_msr）来修改从较高级控制器接收的电压源转换器的有功功率需求（Pdemand） 。

公开(公告)号：US20130307462A1

公开(公告)日：2013-11-21

申请号：US13981473

申请日：2011-03-28

Applicant: Manabu Ohashi ,  Kazuya Nakamura

Inventor： Manabu Ohashi ,  Kazuya Nakamura

IPC: H02P27/06

CPC classification number: H02P27/06 ,  H02M1/32 ,  H02P3/22 ,  H02P2201/03 ,  H02P2201/07 ,  Y02P80/116

Abstract: A circuit disconnection element that can open or short-circuit between a power storage element and a step-up/step-down bidirectional chopper circuit is provided in a power storage system, thereby preventing a self-discharge state in a process of charging. Furthermore, at the time of occurrence of an abnormality, the power storage element is detached from other devices including the step-up/step-down bidirectional chopper circuit. Accordingly, an energy loss of the power storage element at the time of power regeneration can be reduced to improve the energy use efficiency. Further, breakage influences such that the power storage element causes breakage in other devices at the time of occurrence of the abnormality can be prevented, thereby enabling to obtain an AC motor drive device having mounted therein a highly safe power storage system.

Abstract translation: 在蓄电系统中设置有能够在蓄电元件与升压/降压双向斩波电路之间断开或短路的电路断路元件，从而防止充电过程中的自放电状态。 此外，在异常发生时，蓄电元件与包括升压/降压双向斩波电路的其他装置分离。 因此，可以降低功率再生时的蓄电元件的能量损失，提高能量利用效率。 此外，可以防止在发生异常时蓄电元件导致其他装置中的断线的破损，从而能够获得安装有高度安全的蓄电系统的交流电动机驱动装置。

公开(公告)号：US08014110B2

公开(公告)日：2011-09-06

申请号：US11932054

申请日：2007-10-31

Applicant: Harold R. Schnetzka ,  Ivan Jadric

Inventor： Harold R. Schnetzka ,  Ivan Jadric

IPC: F21V7/04 ,  H02H5/04 ,  H02H7/08

CPC classification number: H02M1/12 ,  F25B49/025 ,  F25B2600/021 ,  H02M2001/123 ,  H02P27/08 ,  H02P29/50 ,  H02P2201/03 ,  H03L7/093 ,  H03L7/095 ,  H05K7/20936 ,  Y02B30/741

Abstract: Systems and methods for operating a variable speed drive to receive an input AC power at a fixed AC input voltage and frequency and provide an output AC power at a variable voltage and variable frequency. The variable speed drive includes a converter stage to convert the input AC voltage to a boosted DC voltage, a DC link connected to the converter stage to filter and store the boosted DC voltage from the converter stage; and an inverter stage to convert the boosted DC voltage into AC power with variable voltage and the variable frequency. An integral bypass contactor is connected in parallel with the VSD between the AC power source and the AC output power. The integral bypass contactor is arranged to bypass the VSD when the VSD output frequency and voltage are approximately equal with the AC input voltage and frequency.

Abstract translation: 用于操作变速驱动器以固定的AC输入电压和频率接收输入AC电力的系统和方法，并以可变电压和可变频率提供输出AC电力。 变速驱动器包括转换器级，用于将输入交流电压转换为升压直流电压;连接到转换器级的直流链路，用于对来自转换器级的升压直流电压进行滤波和存储; 以及将升压的直流电压转换为具有可变电压和可变频率的交流电的逆变器级。 一体式旁路接触器与交流电源和交流输出电源之间的VSD并联连接。 当VSD输出频率和电压与交流输入电压和频率近似相等时，集成旁路接触器被布置为绕过VSD。