Abstract: A fluid machine includes: a shaft portion; a shroud surrounding the shaft portion and including an inside surface that forms a flow path-forming surface defining a flow path with the shaft portion; a first propeller rotatably provided in the flow path; a second propeller rotatably provided on a downstream side of the first propeller in the flow path; and a motor including a rotor that is fixed to an outer circumferential portion of the second propeller and that is accommodated in the shroud, and a stator that surrounds the rotor via a clearance and that is fixed in the shroud. A portion of the flow path-forming surface on a downstream side of the second propeller decreases in diameter toward the downstream side, and the shroud includes an inlet flow path that is open at a portion between the first propeller and the second propeller of the flow path-forming surface.

Abstract: An axial-gap coreless rotary electric machine includes rotors, stators, and a case. Armature coils of the stators include a first coil segment and a second coil segment disposed to face the first coil segment. The case includes a first case segment and a second case segment disposed to face the first case segment.

Abstract: A magnetic pole piece device according to an embodiment is a magnetic pole piece device disposed between an inner diameter side magnet field and an outer diameter side magnet field of a magnetic gear that includes an annular member which includes a plurality of magnetic pole pieces disposed at intervals in a circumferential direction, and a plurality of holding members respectively disposed between the plurality of magnetic pole pieces, and a cover member which is made of a composite material obtained by impregnating continuous fiber extending along the circumferential direction with a matrix resin. The cover member is disposed on at least one of an outer circumferential surface and an inner circumferential surface of the annular member. A relation of ?·tc?t?½·tc is satisfied, where tc is a gap between the annular member and the magnet field and t is a thickness of the cover member.

Abstract: A fluid machine includes: a shaft portion; a shroud surrounding the shaft portion and including an inside surface that forms a flow path-forming surface defining a flow path with the shaft portion; a first propeller rotatably provided in the flow path; a second propeller rotatably provided on a downstream side of the first propeller in the flow path; and a motor including a rotor that is fixed to an outer circumferential portion of the second propeller and that is accommodated in the shroud, and a stator that surrounds the rotor via a clearance and that is fixed in the shroud. A portion of the flow path-forming surface on a downstream side of the second propeller decreases in diameter toward the downstream side, and the shroud includes an inlet flow path that is open at a portion between the first propeller and the second propeller of the flow path-forming surface.

Abstract: A fluid machine includes: a shaft portion extending in an axis direction; a shroud provided to surround the shaft portion, and forming a flow path between the shroud and the shaft portion, the flow path having one side in the axis direction serving as an upstream side and another side in the axis direction serving as a downstream side; a propeller provided rotatably around the axis between the shaft portion and the shroud; a motor provided in the shroud and configured to rotationally drive the propeller; and a bearing apparatus provided only to the shaft portion, out of the shroud and the shaft portion, and rotationally supporting the propeller.

Abstract: A rotor for an electric motor includes: a rotating element extending along an axis; and a retaining body formed of metal and configured to hold the rotating element from an outer peripheral side, where the retaining body includes: a plurality of annular members annularly surrounding an outer peripheral surface of the rotating element and arranged at intervals in the axis direction; and a plurality of connecting members arranged in a circumferential direction between the annular members adjacent to each other so as to connect the annular members. As a result, a path of eddy current is limited and the eddy current can be reduced.

Abstract: A fluid machine includes: a shaft portion; a shroud having an inside surface with a diameter decreasing from an upstream side toward a downstream side, a flow path being formed between the shroud and the shaft portion and having a flow path cross-sectional area decreasing toward the downstream side; a propeller rotatably provided about an axis between the shaft portion and the shroud and configured to pump a fluid from the upstream side toward the downstream side; and a motor provided to correspond to the propeller and including a rotor having a ring-like shape fixed to an outer circumference portion of the propeller and accommodated in the shroud and a stator having a ring-like shape surrounding the rotor and fixed in the shroud, in which a plurality of the propellers are provided to be spaced apart in the axis direction, the motors are provided in an identical number to the propellers to correspond to each of the propellers, and of a plurality of motors, the rotor of the motor positioned more on the downstr

Abstract: A fluid machine includes: a shaft portion extending in an axis direction; a shroud provided to surround the shaft portion and having a diameter decreasing from an upstream side on one side in the axis direction toward a downstream side on another side in the axis direction, a flow path being formed between the shroud and the shaft portion and having a flow path cross-sectional area decreasing toward the downstream side; a propeller rotatably provided about an axis between the shaft portion and the shroud and configured to pump a fluid from the upstream side toward the downstream side; and a motor provided to correspond to the propeller, the motor including a rotor having a ring-like shape and being fixed to an outer circumference portion of the propeller and accommodated in the shroud and a stator having a ring-like shape surrounding the rotor and being fixed in the shroud, in which the motor is a conical motor in which diameters of the rotor and the stator decrease from the upstream side toward the downstrea

Abstract: A fluid machine includes: a shaft portion extending in an axis direction; a shroud provided to surround the shaft portion, and forming a flow path between the shroud and the shaft portion, the flow path having one side in the axis direction serving as an upstream side and another side in the axis direction serving as a downstream side; a first propeller provided rotatably around the axis between the shaft portion and the shroud; a second propeller provided rotatably around the axis between the shaft portion and the shroud on the downstream side of the first propeller; an outer periphery driving motor provided in the shroud and configured to rotationally drive the first propeller; and an inner periphery driving motor provided in the shaft portion and configured to rotationally drive the second propeller in a direction opposite to the rotational direction of the first propeller.

Abstract: A rotary electric machine includes an armature unit including an annular rotor configured to be rotatable around an axis and a stator disposed on a radially outer side of the annular rotor; an input or output shaft coupled at a first end thereof to an external device and extending along an axial direction of the annular rotor in a central space defined in a central portion of the annular rotor; and a coupling device disposed closer to a second end of the input or output shaft than an end of the annular rotor adjacent to the external device in the axial direction of the annular rotor and connecting the input or output shaft and the annular rotor so as to be able to transmit a torque.

Abstract: An object of the present invention is to provide a connector that restricts a movement amount in a direction of detachment between connectors even when an engagement mechanism between the connectors is disengaged. A connector is configured to be used to electrically connect a first electronic device and a second electronic device to each other. This connector includes a fixation-side connector provided on a first electronic device side and including a tubularly formed insertion portion, an electric wire-side connector connected to the second electronic device via an electric wire and configured to be inserted in the insertion portion of the fixation-side connector, and a restriction portion provided on an opposite side of the electric wire-side connector from an insertion direction that is a direction in which the electric wire-side connector is inserted into the insertion portion outside the fixation-side connector and the electric wire-side connector.

Abstract: A rotary electric machine includes an armature unit including an annular rotor configured to be rotatable around an axis and a stator disposed on a radially outer side of the rotor; an input/output shaft coupled at a first end to an external device and extending along an axial direction of the rotor in a central space formed in a central portion of the rotor; and a coupling device disposed closer to a second end of the input/output shaft than an end of the rotor adjacent to the external device is in the axial direction and connecting the input/output shaft and the rotor so as to be able to transmit a torque.

Abstract: This position calculation device for calculating the position of a user terminal that is performing DC is provided with: a transmission unit that transmits, to first wireless base station, accuracy level information indicating the accuracy of positioning of the user terminal based on the type of service; a reception unit that receives, from the first wireless base station, positioning information indicating the result of positioning of the user terminal carried out at the first wireless base station when the accuracy level information indicates a first accuracy level, and receives, from the first wireless base station, positioning information indicating the result of positioning of the user terminal carried out at second wireless base station when the accuracy level information indicates a second accuracy level higher than the first accuracy level; and a position calculation unit that calculates the position of the user terminal by using the positioning information.

Abstract: An object of the present invention is to provide a connector that restricts a movement amount in a direction of detachment between connectors even when an engagement mechanism between the connectors is disengaged. A connector is configured to be used to electrically connect a first electronic device and a second electronic device to each other. This connector includes a fixation-side connector provided on a first electronic device side and including a tubularly formed insertion portion, an electric wire-side connector connected to the second electronic device via an electric wire and configured to be inserted in the insertion portion of the fixation-side connector, and a restriction portion provided on an opposite side of the electric wire-side connector from an insertion direction that is a direction in which the electric wire-side connector is inserted into the insertion portion outside the fixation-side connector and the electric wire-side connector.

Abstract: An inner coil end portion of a coil includes inner notch portions and that are positioned to respectively overlap inner coil end portions of other coils which are adjacent to the coil in an axial direction as seen in the axial direction, and that are capable of accommodating the inner coil end portions of the other coils in the axial direction. An outer coil end portion of the coil includes outer notch portions and that are positioned to respectively overlap outer coil end portions of the other coils which are adjacent to the coil in the axial direction as seen in the axial direction, and that are capable of accommodating the outer coil end portions of the other coils in the axial direction.

Abstract: A motor includes a stator that generates a rotating magnetic field; a rotor supported rotatably by a shaft within the stator; an outermost peripheral permanent magnet that is a permanent magnet embedded inside the rotor in an arced shape forming a convexity at the inner surface of the rotor; and an inner permanent magnet that is a permanent magnet embedded at the inside of the rotor in parallel to the outermost peripheral permanent magnet. The arc angle of the permanent magnets is greater than 90°, the thickness at the center of both inner permanent magnets is thinner than the thickness at the center of the outermost peripheral permanent magnet, and the thickness at the ends of both inner permanent magnets is thicker than the thickness at the ends of the outermost peripheral permanent magnet.

Abstract: In the regions around a magnetic shielding space, curved portions and having a rounded shape, which protrude toward the interior space of a magnetic shielding space, are formed at ends of a first side and a second side close to a first end and a second end of an outer-periphery side. In the vicinity of angular portions and of the magnetic shielding space that are positioned at both ends of the outer-periphery side, the magnetic flux density for a given cross-sectional area of a channel through which a short-circuit magnetic flux flows is reduced, and thus, the level of the short-circuit magnetic flux is reduced.

Abstract: After a Hall IC sensor is set in a connector in such a manner that the Hall IC sensor and a harness are electrically connected to each other, the connector and the Hall IC sensor are inserted from an opposite side of a connector insertion hole in a radial direction toward one side of the connection insertion hole in the radial direction, and a first magnetism collection ring and a second magnetism collection ring are inserted into a torque sensor container portion from a first opening portion in such a manner that the Hall IC sensor is situated between the first magnetism collection ring and the second magnetism collection ring in the radial direction.

Abstract: A motor includes a stator that generates a rotating magnetic field; a rotor supported rotatably by a shaft within the stator; an outermost peripheral permanent magnet that is a permanent magnet embedded inside the rotor in an arced shape forming a convexity at the inner surface of the rotor; and an inner permanent magnet that is a permanent magnet embedded at the inside of the rotor in parallel to the outermost peripheral permanent magnet. The arc angle of the permanent magnets is greater than 90°, the thickness at the center of both inner permanent magnets is thinner than the thickness at the center of the outermost peripheral permanent magnet, and the thickness at the ends of both inner permanent magnets is thicker than the thickness at the ends of the outermost peripheral permanent magnet.

Abstract: Provided is an electric motor in which magnets are reduced in size, thus achieving a reduction in cost, and in which a magnetic torque and a reluctance torque are effectively used by adjusting the magnetic flux density to improve the efficiency, thus achieving a reduction in size and cost. The electric motor is equipped with a rotor that includes a cylindrical rotor iron core in which main magnetic poles and auxiliary magnetic poles are alternately disposed in the circumferential direction, a substantially V-shaped magnet insertion hole that is provided for each of the main magnetic poles and whose convex portion faces a rotor center and is centered on a d-axis passing through the rotor center and the circumference-wise center of the main magnetic pole, and two magnets per pole that are embedded in the magnet insertion hole in a substantially V-shaped manner.