Abstract: A magnetic geared rotating machine includes: a stator; a rotor including a plurality of rotor magnets; and a magnetic pole piece rotor including a plurality of magnetic pole pieces each disposed at a radial position between the stator and the rotor. Each of the magnetic pole pieces has a magnetic pole piece end face facing one side in an axial direction. Each of the rotor magnets has a rotor magnet end face facing the one side. At least part of the magnetic pole piece end face is located on the other side in the axial direction relative to the rotor magnet end face, or a finger end face, of each of a plurality of fingers, facing the one side is located on the other side relative to a tooth end face, of a tooth of the stator, facing the one side, the plurality of fingers being configured to hold therebetween a stator magnet disposed on the tooth from both sides in a circumferential direction.

Abstract: 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 at a radial position between the stator and the rotor.

Abstract: 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.

Abstract: 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.

Abstract: A power generation system includes: a prime mover; a magnetic gear generator configured to be driven by an input from the prime mover to generate power; a power converter connected to the magnetic gear generator; an operation mode switch unit configured to switch an operation mode of the magnetic gear generator to a step-out avoidance mode in response to that a step-out parameter indicating a risk of step-out of the magnetic gear generator exceeds a prescribed allowable range; and a reduction command unit configured to give the prime mover an input reduction command to reduce the input from the prime mover and configured to give the power converter a torque reduction command to reduce a generator torque of the magnetic gear generator, in the step-out avoidance mode.

Abstract: A magnetic geared rotary electric machine includes: a stator which includes a stator core formed in an annular shape centered on an axis, a coil installed inside a slot of the stator core, and a plurality of stator magnets installed inside the stator core at intervals in a circumferential direction about the axis; a first rotor which includes a plurality of pole pieces provided inside the stator at intervals in the circumferential direction of the axis; and a second rotor which includes a rotor core provided inside the first rotor and a plurality of rotor magnets provided in the rotor core at intervals in the circumferential direction. The stator further includes an anti-vibration member that is made of fiber-reinforced plastic and is installed on an inner surface of the stator core.

Abstract: A magnetic pole piece device, which is disposed between an inner diameter side magnet field and an outer diameter side magnet field of a magnetic gear, includes a plurality of magnetic pole pieces disposed at intervals in a circumferential direction of the magnetic gear. Each of the plurality of magnetic pole pieces includes a plurality of plate-shaped electrical steel sheets having a longitudinal direction. The plurality of electrical steel sheets are laminated along the circumferential direction, with the longitudinal direction being along an axial direction of the magnetic gear.

Abstract: An electric-powered vehicle includes: an axle body that includes an axle and drive wheels connected to both ends of the axle; a magnetic geared motor for rotating the axle, the magnetic geared motor including a stator, a low-speed rotor, and a high-speed rotor; a vehicle structure supported by the axle body; a motor support for connecting the vehicle structure and the stator, and supporting the magnetic geared motor by the vehicle structure; and an elastic coupling for coupling the low-speed rotor and the axle such that a rotational force of the low-speed rotor is transmittable to the axle.

Abstract: A magnetic geared rotary electric machine is provided with: a casing; a stator including a stator core, a coil, and a plurality of stator magnets; a first rotor including a plurality of pole pieces provided inside the stator; and a second rotor including a rotor core provided inside the first rotor and a plurality of rotor magnets provided in the rotor core, wherein the stator core includes a back yoke and a plurality of teeth protruding radially inward from the back yoke and provided at intervals in the circumferential direction, a plurality of the stator magnets are attached to radially inner end portions of the teeth in the circumferential direction, and the stator magnets are attached to the stator core so that a first portion of the tooth to which the stator magnets are attached is allowed to separate from a second portion of the stator core.

Abstract: A magnetic geared rotary electric machine includes: a casing; a stator including a stator core fixed to the casing and formed in an annular shape centered on an axis, a coil installed inside a slot of the stator core, and a plurality of stator magnets installed inside the stator core at intervals in a circumferential direction about the axis; a first rotor including a plurality of pole pieces provided inside the stator at intervals in the circumferential direction about the axis; and a second rotor including a rotor core provided inside the first rotor and a plurality of rotor magnets provided in the rotor core at intervals in the circumferential direction. The stator core includes a back yoke surrounding the axis and a plurality of teeth formed on the back yoke at intervals in the circumferential direction.

Abstract: 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.

Abstract: A magnetic pole piece device disposed between an inner diameter side magnet field and an outer diameter side magnet field of a magnetic gear, includes: an outer circumferential cover member disposed opposite to the outer diameter side magnet field and having a cylindrical shape; an inner circumferential cover member disposed opposite to the inner diameter side magnet field and having a cylindrical shape; and a plurality of magnetic pole pieces disposed at intervals in a circumferential direction between the outer circumferential cover member and the inner circumferential cover member. The outer circumferential cover member includes a plurality of outer circumferential side facing portions facing outer circumferential surfaces of the plurality of magnetic pole pieces, and a plurality of outer circumferential side connecting portions for connecting two adjacent outer circumferential side facing portions of the plurality of outer circumferential side facing portions.

Abstract: A magnetic field generator includes a plurality of magnets on support members disposed opposite to each other across a gap. The plurality of magnets include: first magnets having a magnetization direction orthogonal to a support surface of each of the support members; and second magnets having a magnetization direction parallel to the support surface, and form a Halbach magnet array. Either of the first magnets or the second magnets has a first dimension orthogonal to the support surface which is smaller than a first dimension of the other of the first magnets or the second magnets, either of the first magnets or the second magnets being formed into a recessed shape as viewed from a side of the gap.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.