Mitsubishi Heavy Industries Limited

Mhi Vestas Offshore Wind A/s

Takatoshi Matsushita

Shinji Arinaga

Tsuyoshi Wakasa

Akira Yasugi

Masaaki Shibata

Masayuki Sakai

Yasutaka Aoki

Mikito Sasaki

Takehiro Naka

Takeshi Matsuo

Ryoji Okabe

Masayuki Hashimoto

Shinsuke Sato

Nobuyasu Nakamura

Takumi Nakashima

Masahiro Kawai

Osamu Hasegawa

Tomohiro Numajiri

Yoshihiko Hayashi

Kazunari Ide

Yukio Yamashita

Keisuke Ota

Takayuki Shimizu

Takao Kuroiwa

Koji Fukami

Kentaro Hayashi

Kazuhisa Tsutsumi

Atsushi Yuge

Kai Karikomi

Masaya Mitake

Hisanobu Shinoda

Hiroyuki Yagita

Toshiyuki Hirano

Katsuhiko Shoda

Akihiko Umeda

Kengo Imaoka

Takashi Toyohara

Hidekazu Ichinose

Takeshi Ikemi

Sadamu Takahashi

Takashi Uchino

Masao Komatsu

Hitoshi Onuma

A magnetic geared rotating machine, includes: a stator which includes a plurality of stator magnets arranged so as to be aligned in a circumferential direction; a rotor which includes a plurality of rotor magnets arranged so as to be aligned in the circumferential direction, and in which the number of magnetic poles of the plurality of rotor magnets is less than the number of magnetic poles of the plurality of stator magnets; and a magnetic pole piece rotor which includes a plurality of magnetic pole pieces arranged so as to be aligned in the circumferential direction. Each of the magnetic pole pieces has: a first face opposed to the rotor in a radial direction; and a second face opposed to the stator in the radial direction and having a circumferential length longer than a circumferential length of the first face.

Magnetic geared rotating machine and power generation system

A magnetic geared electrical machine includes: a stator including a stator coil; a first rotor which includes a plurality of pole pieces arranged with a first radial gap between the stator and the plurality of pole pieces, a first cooling passage including the first radial gap being formed between the first rotor and the stator; a second rotor which includes a plurality of rotor magnets, is arranged opposite to the stator across the first rotor in a radial direction with a second radial gap between the pole pieces and the plurality of rotor magnets, a second cooling passage including the second radial gap being formed between the first rotor and the second rotor; an inlet cavity for cooling gas formed on one end side in an axial direction with respect to the stator, the first rotor and the second rotor; and an outlet cavity formed on another end side in the axial direction with respect to the stator, the first rotor and the second rotor, the outlet cavity being configured to receive the cooling gas that has passed through each of the first cooling passage and the second cooling passage. A dimension of the first radial gap is greater than a dimension of the second radial gap.

Magnetic geared electrical machine and power generation system

A magnetic geared electrical machine includes: a stator including a stator coil; a first rotor including a plurality of pole pieces; a second rotor including a plurality of rotor magnets, and arranged opposite to the stator across the first rotor in a radial direction; a housing having a first inlet opening and a second inlet opening, and supporting the stator; a first inlet cavity defined by at least the housing so as to communicate with the first inlet opening provided in the housing and with a first radial gap between the stator and the first rotor; and a second inlet cavity defined by at least the housing so as to communicate with the second inlet opening provided in the housing and with a second radial gap between the first rotor and the second rotor.

Magnetic geared electrical machine and power generation system using the same

An outer diameter side magnet field pole piece assembly for a magnetic gear which is disposed on an outer circumferential side of a plurality of magnetic pole pieces disposed on an outer circumferential side of the outer diameter side magnet field pole piece assembly along a circumferential direction, includes: a plurality of magnetic pole pairs disposed on the outer circumferential side of the plurality of magnetic pole pieces along the circumferential direction; and a support member for supporting the plurality of magnetic pole pairs from the outer circumferential side. A space along an axial direction is formed in at least a part between an outer circumferential surface of each of the plurality of magnetic pole pairs and an opposite surface of an inner circumferential surface of the support member opposite to the outer circumferential surface of each of the plurality of magnetic pole pairs.

Outer diameter side magnet field and magnetic gear

A method of testing a receptor of a wind turbine includes a step of moving an unmanned aerial vehicle (UAV) close to the receptor of a wind turbine blade mounted to a hub of the wind turbine, and performing an electric continuity test on the receptor.

Method of testing wind-turbine receptor

When a low voltage event occurs in a utility grid, a load on a spindle system is repressed so that a damage is prevented. A rotor having a plurality of wind turbine blades, a generator to be driven by rotation of the rotor, and a pitch angle controller for controlling a pitch angle of the wind turbine blade according to a generator speed are provided, and when a voltage of a utility grid is a predetermined value or less, the pitch angle controller controls the pitch angle so that torsional vibration generated on a spindle system for transmitting the rotation of the rotor to a generator system is repressed.

Wind turbine generator, method of wind turbine generation, and program of the wind turbine generator

A rotor having a plurality of wind turbine blades, a generator to be driven by rotation of the rotor, a pitch angle controller for controlling a pitch angle of the wind turbine blades according to a speed of a generator, and a comparing and selecting section are provided. When the voltage of the utility grid is a predetermined value or less, the pitch angle controller controls the pitch angle so that the wind turbine blades do not move to a fine side. Further, the comparing and selecting section compares a temporary pitch angle command value determined based on the speed of the generator with a previous value of a pitch angle command value, and when the temporary pitch angle command value is a command for controlling the wind turbine blades closer to the fine side than the previous value, outputs the previous value as a current pitch angle command value.

Wind turbine generator, method, and program thereof

The control system of this floating wind turbine generator is a control system of a floating wind turbine generator in which the control system controls a pitch angle control section by a pitch angle instruction value calculated on the basis of signals detected by a second sensor detecting a relative angle between a nacelle and a tower and a third sensor detecting a yaw angle from a reference position of the tower so that a signal detected by a first sensor detecting wind direction deviation relative to a vertical direction of a rotation plane of wind turbine blades indicates an angle within a predetermined range from the vertical direction of the rotation plane of the wind turbine blades, and controls a yaw driving device by a yaw driving instruction value calculated on the basis of the signals detected by the second sensor and the third sensor.

Control system, method and program, and floating wind turbine generator provided therewith

An object is to provide a wind turbine generator that is capable of continuously operating an auxiliary unit even when a grid fault occurs. Provided is a wind turbine generator including an auxiliary-unit breaker provided in a power line that connects an auxiliary unit to a power grid, wherein the auxiliary-unit breaker has a current-resisting capacity within a range that tolerates a current that flows in a low-voltage event and does not exceed a tolerable current of a motor provided in the auxiliary unit.

Wind turbine generator

A wind power generation system is disclosed for suppressing an increase of torque when a voltage in a utility grid is restored, and to reduce a load to devices due to the torque. The wind power generation system includes a blade control unit for controlling the pitch angle of the wind turbine blades such that the pitch angle matches a target pitch angle determined on the basis of at least one of a wind speed, a rotation speed of the power generator, and a requested output power when the power control unit re-actuates the operations of the converter and the inverter.

Coordinated control of power converter and pitch angle for wind turbine generation system

An object is to improve the accuracy of power factor adjustment. Power-factor command values corresponding to individual wind turbines are determined by correcting a predetermined power-factor command value for an interconnection node using power factor correction levels set for the individual wind turbines.

Wind-power generation system and operation control method therefor

In a wind turbine generator, the rotation of the rotor is speeded up by a hydraulic pump and a hydraulic motor and is transferred to a synchronous generator. In a state in which the wind turbine generator is interconnected to a utility grid, and the synchronous generator reaches a synchronous speed, if no mechanical power is transferred to the synchronous generator, a wind-turbine control system operates the synchronous generator as a synchronous condenser, thus controlling the magnitude of the field current of the synchronous generator. Thus, the wind turbine generator can supply reactive power to the utility grid without adding new equipment, such as a reactive power compensator using a semiconductor switch.

Wind-turbine-generator control system, wind turbine generator, wind farm, and wind-turbine-generator control method

An object is to improve the accuracy of reactive power adjustment. Reactive-power command values corresponding to individual wind turbines are determined by correcting a predetermined reactive-power command value for an interconnection node A using reactive power correction levels set for the individual wind turbines.

Wind turbine generator system and operation control method therefor

A wind turbine blade has a blade body, a plurality of receptorsembedded in and exposed to the surface of the blade body, a conductor layerprovided on the surface of the blade bodyand connecting the receptorswith one another and a downconductorconnected to the receptorsand provided in the blade body. The downconductormay be embedded in an insulator.

Wind turbine blade and wind turbine generator having the same

A wind turbine generator is provided in which the efficiency of heating the interior of a nacelle can be improved at a low outside air temperature in a cold region. The wind turbine generator includes a nacelle that accommodates a driving and generating mechanism connected to a rotor head fitted with turbine blades, wherein the nacelle is equipped with a lubricant-oil cooling fan and a generator cooling fan that ventilate the interior of the nacelle to prevent an increase in the temperature of the interior and a heating device that raises the temperature of the interior of the nacelle at a low outside air temperature, wherein the cooling fans can be operated with the rotating directions and the rotational speeds thereof being controlled, and during the operation of the heating device, the rotating directions and the rotational speeds of the cooling fans are controlled so as to make the wind velocity at the ventilation ports thereof about zero.

Temperate control for wind turbine generator

Growing community of inventors

Nagasaki, Japan

Takatoshi Matsushita