公开(公告)号：US20170133916A1

公开(公告)日：2017-05-11

申请号：US15412677

申请日：2017-01-23

Applicant: NTN CORPORATION

Inventor： Masatoshi MIZUTANI ,  Hiroyuki Noda ,  Natsuhiko Mori ,  Ryousuke Karasawa ,  Tomomi Goto ,  Yuuki Shimura

IPC: H02K11/04 ,  H02K1/22 ,  F03D9/25 ,  H02K1/12 ,  H02K11/00 ,  H02K7/18

CPC classification number: H02K11/046 ,  F03D9/25 ,  H02K1/12 ,  H02K1/22 ,  H02K7/183 ,  H02K11/0094 ,  H02P9/08 ,  Y02E10/725

Abstract: A power generator includes: an output iron core having an output winding wound therearound; and a field iron core having a main field winding and an auxiliary field winding wound therearound, and is a self-excitation type in which one of the output iron core and the field iron core serves as a stator and the other serves as a rotor, the main field windin is connected to a first rectifying element, the auxiliary field winding is connected to a second rectifying element, and power is generated by relative rotation of the stator and the rotor. The power generator is provided with an initial excitation unit configured to apply, to one or both of the output iron core and the field iron core, a magnetic force to a degree required for initial excitation in power generation.

公开(公告)号：US09641050B2

公开(公告)日：2017-05-02

申请号：US14232244

申请日：2012-07-17

Applicant: Guillermo Fabregat Balboa ,  Daniel García I Erill ,  Santiago Claramunt Estecha

Inventor： Guillermo Fabregat Balboa ,  Daniel García I Erill ,  Santiago Claramunt Estecha

IPC: H02K7/18 ,  F03D7/02 ,  F03D9/00 ,  H02K1/06 ,  H02K15/16 ,  G06F17/50 ,  F03D17/00

CPC classification number: H02K7/183 ,  F03D7/0272 ,  F03D9/25 ,  F03D17/00 ,  F05B2220/7066 ,  F05B2270/305 ,  G06F17/5009 ,  H02K1/06 ,  H02K7/1838 ,  H02K15/16 ,  H02K2201/03 ,  Y02E10/723 ,  Y02E10/725

Abstract: A wind turbine generator comprising a rotor, a stator and an air gap between a gap-delimiting region of the stator and a gap-delimiting region of the rotor; wherein the rotor and/or the stator are deformable under operational loads and configured in such a way that the air gap resulting from the presence of operational loads is more uniform than the air gap in the absence of operational loads. A method for optimizing an air gap between a gap-delimiting region of a stator and a gap-delimiting region of a rotor of a wind turbine generator, said rotor and/or said stator being deformable under operational loads and said optimization consisting in that the air gap resulting from the presence of the set of operational loads is more uniform than the air gap in the absence of the set of operational loads.

公开(公告)号：US09641034B2

公开(公告)日：2017-05-02

申请号：US14049719

申请日：2013-10-09

Applicant: HITACHI, LTD.

Inventor： Tomomichi Ito ,  Naohiro Kusumi ,  Noriaki Hino ,  Nobuhiro Kusuno ,  Aung Kothet

IPC: H02M7/48 ,  H02K3/12 ,  H02K3/28 ,  H02K11/33 ,  H02M1/12

CPC classification number: H02K3/12 ,  H02K3/28 ,  H02K11/33 ,  H02M2001/123 ,  Y02E10/725

Abstract: A rotary machine includes two sets of three-phase stator winding wires and two sets of inverters connected to the same direct-current power supply. Alternating-current terminals of the inverters are respectively connected to the three-phase stator winding wires. Stator winding wires are housed in a plurality of slots to form a stator. The two sets of three-phase stator winding wires and the stator winding wires in the same phase of the sets are started to be wound from the slot positions, with phases thereof being different from each other by 180 degrees, among the plurality of slots and are finished being wound in the slot positions, with phases thereof different from each other by 180 degrees. Winding end points of the three-phase stator winding wires are respectively connected in common, and alternating-current voltages having the same magnitude and opposite phases are applied to the two sets of three-phase stator winding wire.

公开(公告)号：US20170117722A1

公开(公告)日：2017-04-27

申请号：US15293392

申请日：2016-10-14

Applicant: General Electric Company

Inventor： Longhui Shen ,  Xianfeng Zhang

IPC: H02J7/00 ,  H02M1/08 ,  F03D9/11 ,  F03D9/25 ,  H02K7/18 ,  F03D7/02 ,  H02P27/08 ,  F03D9/00

CPC classification number: H02J7/0021 ,  F03D7/0224 ,  F03D9/11 ,  F03D9/25 ,  F05B2260/76 ,  F05B2270/602 ,  H02J3/386 ,  H02J7/0081 ,  H02J7/345 ,  H02K7/1838 ,  H02M1/08 ,  H02M1/32 ,  H02M1/36 ,  H02M3/155 ,  H02M7/48 ,  H02P27/08 ,  Y02E10/725 ,  Y02E10/763 ,  Y02T10/7055

Abstract: Systems and methods of pre-charging a capacitor bank are provided. In particular, a power switch and a current limiting device can be coupled in series between a power source and a capacitor bank. Operation of the power switch can be controlled to limit a peak charging current applied to the capacitor bank during a pre-charging process. In this manner, a duty cycle of a pulse signal can be modified based at least in part on a measured current flowing into the current limiting device. In addition, a voltage at the capacitor bank can be monitored, and the pre-charging process can be ceased when the monitored voltage reaches a threshold.

公开(公告)号：US09631607B2

公开(公告)日：2017-04-25

申请号：US14681851

申请日：2015-04-08

Applicant: Aloys Wobben

Inventor： Wilko Gudewer

IPC: H02K9/04 ,  H02K5/20 ,  F03D9/00 ,  F04D29/58 ,  H02K7/18

CPC classification number: F03D80/60 ,  F03D9/25 ,  F03D17/00 ,  F04D29/582 ,  H02K5/20 ,  H02K7/1838 ,  H02K9/04 ,  Y02E10/721 ,  Y02E10/722 ,  Y02E10/725

Abstract: A ring generator of a wind power installation is provided comprising a stator having a peripherally extending stator ring for receiving stator windings and a rotor mounted rotatably about an axis of rotation relative to the stator, wherein the stator ring has cooling passages for cooling the stator by an air flow. A ring generator of a wind power installation is also provided having a stator, a peripherally extending stator ring for receiving stator windings, a rotor mounted rotatably relative to the stator and a stator bell connected to the stator ring for providing a pressure chamber with an increased or reduced pressure for providing an air flow through and/or along the stator and/or rotor for cooling the ring generator, wherein the stator bell has at least one fan opening provided with a fan.

公开(公告)号：US20170107974A1

公开(公告)日：2017-04-20

申请号：US15391389

申请日：2016-12-27

Applicant: X Development LLC

Inventor： Andrew Goessling ,  Leo Casey

IPC: F03D9/00 ,  B64C39/02 ,  B64F3/02 ,  H02K7/18 ,  F03D9/25 ,  H02M7/44 ,  H02M1/08 ,  B64D35/02 ,  F03D9/32

CPC classification number: F03D13/20 ,  B64C39/022 ,  B64D35/02 ,  B64F3/02 ,  F03D1/02 ,  F03D7/026 ,  F03D9/25 ,  F03D9/255 ,  F03D9/32 ,  F05B2240/921 ,  H02J3/382 ,  H02J3/386 ,  H02K7/183 ,  H02M1/083 ,  H02M3/24 ,  H02M7/44 ,  Y02E10/723 ,  Y02E10/725 ,  Y02E10/728 ,  Y02E10/763

Abstract: A method may involve transmitting power between a tethered aerial vehicle equipped with wind turbines for generating power and a ground station configured to interconnect the generated power to an electrical distribution network. The power may be transmitted using high voltage, high frequency AC electrical signals, and transformers at the ground station and the aerial vehicle can scale the AC voltage for use at the respective locations. Converters at the ground station and the aerial vehicle can then convert the transformed voltage to DC. The AC voltage may be transmitted through the tether at a resonant frequency of the tether based in part on an internal capacitance between multiple conductive paths on the tether.

公开(公告)号：US09627949B2

公开(公告)日：2017-04-18

申请号：US13893654

申请日：2013-05-14

Applicant: James Kenneth Booth ,  Rune Nielsen

Inventor： James Kenneth Booth ,  Rune Nielsen

IPC: H02K15/02 ,  H02K15/10 ,  H02K15/16 ,  H02K7/18

CPC classification number: H02K15/02 ,  H02K7/1838 ,  H02K15/16 ,  Y02E10/725 ,  Y10T29/49012 ,  Y10T29/53143

Abstract: A method of vertically assembling a generator of a wind turbine is provided. The method includes A rotor part is arranged on a horizontal assembly which supports components of the generator such that a rotational axis of a component is essentially vertical during assembly, and the assembly support is configured to allow access to an interior of a generator component during the assembly procedure; a stator part is arranged in the rotor part; and the stator part is joined to the rotor part. An assembly arrangement for a vertical assembly of a generator of a wind turbine is provided. The assembly arrangement includes a horizontal assembly support for supporting components of the generator such that a rotational axis of a component is essentially vertical during assembly, and the assembly support is configured to allow access to an interior of a generator component during the assembly procedure.

公开(公告)号：US09624908B2

公开(公告)日：2017-04-18

申请号：US14253893

申请日：2014-04-16

Applicant: SIEMENS AKTIENGESELLSCHAFT

Inventor： Giovanni Airoldi ,  Uffe Eriksen ,  Soeren Gundtoft ,  Claus Michaelsen ,  Thorkil Munk-Hansen ,  Peter Hessellund Soerensen ,  Claus Thygesen ,  Xavier Tourde

IPC: H02K9/04 ,  H02K7/18 ,  F03D9/00 ,  F03D1/00 ,  F03D80/00 ,  F03D9/25

CPC classification number: F03D80/60 ,  F03D1/00 ,  F03D9/25 ,  F03D15/20 ,  F03D80/00 ,  F05B2260/20 ,  F05B2260/64 ,  H02K7/18 ,  H02K7/1838 ,  H02K9/04 ,  Y02E10/725 ,  Y02T50/675

Abstract: An airflow control arrangement for a direct-drive wind-turbine with a generator comprising a rotor and a stator, which airflow control arrangement comprises an outflow fan arranged to draw an exit airflow through an exit duct, which exit duct extends from an interior cavity of the stator to the exterior of the wind turbine. The invention further describes a direct-drive wind turbine comprising such an airflow control arrangement. The invention further describes a method of controlling an airflow in a direct-drive wind-turbine with a generator comprising a rotor and a stator is provided.

公开(公告)号：US20170101981A1

公开(公告)日：2017-04-13

申请号：US14881155

申请日：2015-10-13

Applicant: Huseyin Ozcan

Inventor： Huseyin Ozcan

IPC: F03D9/00 ,  F03D9/10 ,  F03D13/20 ,  F03D1/06 ,  F03D1/04

CPC classification number: F03D9/17 ,  F03D9/28 ,  F03D80/80 ,  Y02E10/721 ,  Y02E10/725 ,  Y02E60/15 ,  Y02E60/17

Abstract: The present invention is an improved arrangement for a wind turbine system wherein the power generator unit is independently installed at ground level to minimize the vertical compressive load imposed on the poles. The wind turbine system is powered by an integrated air power unit comprising an air pump driving an air motor operationally coupled to the power generator at ground level. A lighter weight air pump replacing the old system generator is operationally coupled to the wind turbine rotor blades disposed atop the pole. A pipe line supplies pressurized air from the air pump to the air motor thereby causing the power generator to rotate.

公开(公告)号：US09617976B2

公开(公告)日：2017-04-11

申请号：US15249539

申请日：2016-08-29

Applicant: General Electric Company

Inventor： Thomas Edenfeld

IPC: F03D9/00 ,  H02P9/04 ,  F03D7/02 ,  F03D7/04 ,  H02J3/38 ,  H02P9/00 ,  F03D9/25 ,  H02P11/00

CPC classification number: F03D7/0272 ,  F03D7/0276 ,  F03D7/028 ,  F03D7/048 ,  F03D9/25 ,  F03D9/257 ,  F05B2220/70646 ,  F05B2270/32 ,  H02J3/386 ,  H02P9/007 ,  H02P9/008 ,  Y02E10/723 ,  Y02E10/725

Abstract: Systems and methods for increasing the power output of wind turbines in a wind farm are disclosed. In particular, a wind farm can include first and second doubly fed induction generator wind turbine systems. The rotational rotor speed of the first wind turbine system can be regulated at reduced wind speeds based at least in part on data indicative of rotor voltage to increase power output of a doubly fed induction generator. The rotor speed can be regulated such that the rotor voltage does not exceed a voltage threshold. The power output of the first wind turbine system can be further increased by reducing its reactive power output. The reduced reactive power output of the first wind turbine system can be compensated for by an increased reactive power output of the second wind turbine system.