Abstract: A rotor according to an aspect of the present invention includes a shaft including: a first shaft hole extending in an axial direction; and a second shaft hole extending radially outward from the first shaft hole and opening to an outer peripheral surface of the shaft. A rotor core includes a plurality of core holes extending in the axial direction and disposed at intervals in a circumferential direction. A plate includes a through-hole overlapping the core hole when viewed in the axial direction, and a flow path connecting the second shaft hole and the through-hole. The plate has an outer edge away from a central axis by a second distance that is shorter than a first distance from the central axis to an outer edge of the rotor core.

Abstract: A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions disposed across the teeth, a first pin and a second pin each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. Each of the working portions of the second pin and the third pin is disposed in one of an outermost stage and an innermost stage of the slot. A number of teeth straddled by the second pin is smaller than a number of teeth straddled by the first pin.

Abstract: One aspect of a method of manufacturing a rotor of the present invention is the method of manufacturing the rotor, which includes a rotor core rotatable about a central axis and a rotor magnet fixed to an outer peripheral surface of the rotor core, the method including a magnetization step of magnetizing a first magnetic member fixed to the outer peripheral surface of the rotor core to form the rotor magnet. The rotor core has a hole recessed from a surface on one side in an axial direction of the rotor core to the other side in the axial direction. In the magnetization step, the first magnetic member is magnetized in a state where a second magnetic member made of a magnetic material is inserted into the hole.

Abstract: A rotor according to one aspect of the present invention is a rotor that is provided to a rotating electrical machine, opposes a stator, and rotates about a central axis line. The rotor includes: a plurality of magnetic pole parts lined along a circumferential direction centered on the central axis line; and a rotor core that supports the magnetic pole parts from one side of a radial direction. The magnetic pole part includes a main magnet whose magnetization direction is the radial direction; and secondary magnets whose magnetization directions are directions tilted in a circumferential direction with respect to the radial direction, the secondary magnets being disposed symmetrically with each other on an outer side of the main magnet in the circumferential direction. At least some of side faces of the secondary magnet extending in the axial direction are flat faces that are parallel or orthogonal to the magnetization direction.

Abstract: An interior permanent magnet motor includes a rotor with permanent magnets spaced apart in a circumferential direction, and a rotor core with core pieces positioned between adjacent permanent magnets. The permanent magnets include a pair of corner portions at each of an end on an outside in a radial direction and an end on an inside in the radial direction. Each of the core pieces includes at least one of an outer support portion that supports one corner portion of the pair of corner portions at the end of the permanent magnets on the outside in the radial direction or an inner support portion that supports one corner portion of the pair of corner portions at the end of the permanent magnets on the inside in the radial direction, and restricts movement of the permanent magnets in the radial direction.

Abstract: A motor includes a cylindrical rotor core, and a magnet group including first magnets and second magnets alternately arranged along a circumferential direction of the rotor core. A first magnetic flux line generated in the first magnets extends along a radial direction of the rotor core, and a second magnetic flux line generated in the second magnets is inclined with respect to the first magnetic flux line. The rotor core includes an inner portion located on a radially inner side of the magnet group and an outer portion located on a radially outer side of the magnet group. The outer portion includes a first iron core that covers the first magnet from the radially outer side, and a second iron core that covers at least a portion of the second magnet in the central axis direction of the rotor core from the radially outer side.

Abstract: A motor control system includes an inverter and a control calculation unit. The control calculation unit includes a voltage control calculation unit that calculates a voltage command value indicating a voltage to be applied to a motor from the inverter on the basis of a current deviation between the current command value and the actual current detection value, and a compensation calculation unit that compensates at least one of a k-th component and a 1/k-th component in the motor with respect to a signal value on at least one of an upstream side and a downstream side in a signal flow that passes through the voltage control calculation unit. The compensation calculation unit calculates a compensation value on the basis of an actual angular velocity value indicating an angular velocity at which the motor rotates and the target current command value, while also taking into account advance angle control.

Abstract: A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions across the teeth, first and second pins each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. The working portion of the second pin is disposed on one of the outermost and innermost stages of the slot, and the working portion of the third pin is disposed on one or the other of the outermost and innermost stages of the slot. A number of teeth straddled by the second pin is larger by two than a number of teeth straddled by the first pin.

Abstract: A rotary electric machine includes: a rotor in which a plurality of permanent magnets are embedded in an outer peripheral portion, the rotor being rotatable; a stator fixed around the rotor and provided with a plurality of coils in a stator core; and a motor housing that accommodates the rotor and the stator therein. The stator is fixed to the motor housing by a bolt (fastener) inserted into a plurality of fixing portions protruding radially outward from an outer periphery of the stator core, and a flux barrier penetrating in an axial direction is formed near the fixing portion of the stator core and at a position not overlapping the fixing portion in a radial direction. Here, the fixing portions are disposed at equiangular pitches in the circumferential direction of the stator core, and the flux barriers are formed on both sides of the fixing portion in a circumferential direction.

Abstract: A rotor includes a shaft, a cylindrical rotor core, a connector, magnets and a cover. The shaft extends along a central axis. The rotor core surrounds the shaft. The connector is provided radially inside the rotor core and connects the rotor core and the shaft. The magnets are provided radially outside the rotor core along a circumferential direction. The cover is provided radially outside the magnets. The connector includes a cylindrical body surrounding the shaft and a flange. The flange extends radially outward from one axial end of the body and faces the magnets in the axial direction. The cover includes a peripheral surface and an eave. The peripheral surface faces the magnets in a radial direction. The eave extends radially inward from an other axial end of the peripheral surface and faces the magnets in the axial direction.

Abstract: A motor control system includes an inverter, and a control calculation unit that feedback-controls the inverter. The control calculation unit includes a voltage control calculation unit that calculates a voltage command value indicating a voltage to be applied to the motor from the inverter on the basis of a current deviation between a current command value and an actual current detection value, a torque ripple compensation calculation unit that adds a compensation value for compensating a torque ripple in the motor to a signal value on at least one of an upstream side and a downstream side in a signal flow that passes through the voltage control calculation unit, and a current limit calculation unit that limits the current command value by adaptive control based on an actual angular velocity value indicating an angular velocity at which the motor rotates.

Abstract: A motor control system includes an inverter, a voltage control calculating a voltage command value indicating a voltage to be applied to a motor from the inverter based on a deviation between the current command value and the actual current detection value, and a torque ripple compensation unit adding a compensation value for compensating a torque ripple in the motor to a signal value on an upstream side in a signal flow that passes through the voltage control unit. The torque ripple compensation unit includes a phase compensator calculating a compensation value component in the voltage control unit based on an actual angular velocity value indicating an angular velocity at which the motor rotates, and an inverse characteristic processor calculating a compensation value component for compensating the torque ripple based on an inverse characteristic of an open loop transfer function in a feedback control.

Abstract: A rotor used in an outer rotor motor includes a rotor holder in a tubular shape extending along a center axis, a rotor core in a tubular shape extending in an axial direction and being fixed to a surface of the rotor holder, directed radially inward, and permanent magnets bonded to an inner circumferential surface of the rotor core and side by side in a circumferential direction. The rotor core includes projection portions projecting radially inward from the inner circumferential surface of the rotor core. One or more of the projection portions are in a gap between the permanent magnets adjacent to each other in the circumferential direction. Each of the projection portions has an axial length shorter than an axial length of each of the permanent magnets.

Abstract: One aspect of a rotor of the present invention includes: a rotor core rotatable about a central axis; and a rotor magnet fixed to an outer peripheral surface of the rotor core. The rotor magnet has a plurality of magnetized portions arranged along a circumferential direction in a Halbach array. The plurality of magnetized portions include a plurality of radially magnetized portions whose magnetization direction is a radial direction and a plurality of non-radially magnetized portions whose magnetization direction is different from the radial direction. The rotor core is a non-magnetic member that has a hole, recessed from a surface on one side in an axial direction of the rotor core to the other side in the axial direction and is made of a non-magnetic material. The hole is located on the radially inner side of the radially magnetized portion.

Abstract: A rotor includes a rotor core having a hole, and a magnet inside the hole. A stator includes a stator core having an annular core back surrounding the rotor core and teeth extending inward from the core back and arranged at intervals in a circumferential direction, and coils attached to the stator core. The hole has an arc shape protruding inward. The magnet is in the hole and has an arc shape extending along the hole. The rotor core has cavity portions sandwiching the magnet. A curved outer surface of the hole is in close contact with a curved outer surface of the magnet at a portion closer to a center in the circumferential direction than an end portion in the circumferential direction. At least a part of the cavity portion extends to the outer side in the circumferential direction with respect to the center of a pole.

Abstract: An academic ability estimation model generation device to generate an academic ability estimation model with which current academic ability is accurately estimated without requiring comprehensive learning data. The academic ability estimation model generation device includes a decision tree generator that generates a decision tree by using correct/incorrect-answer information as teacher data, the correct/incorrect-answer information indicating that a plurality of answerers who have answered a question group consisting of a plurality of predetermined questions have answered each question correctly or incorrectly; a pruner that deletes a leaf node when an entropy of a classification result indicated by the leaf node being a terminal end of the decision tree which is generated is equal to or lower than a predetermined value. Further, there is a category generator that sets each new terminal end of the decision tree after deleting the leaf node as a category to which any of the answerers belongs.

Abstract: A rotor includes: a shaft; a tubular rotor core; and a plurality of magnets. The shaft extends along a center axis. The rotor core surrounds the shaft. The plurality of magnets is disposed outside the rotor core in a radial direction and is aligned in a circumferential direction. A plurality of first recessed portions recessed outward in the radial direction is aligned in the circumferential direction in an inner surface of the rotor core in the radial direction. Each of the first recessed portions overlaps each of the magnets in the radial direction.

Abstract: A rotor including a pair of first magnets extending in directions away from each other in the circumferential direction as extending from the radially inner side toward the radially outer side when viewed in the axial direction and a second magnet at a circumferential position between the pair of first magnets and extending in a direction orthogonal to the radial direction when viewed in the axial direction. The rotor core includes a pair of holes extending in the axial direction or a pair of groove portions each arranged in the first pattern at the position of the first angle from the d-axis with the d-axis interposed therebetween on an outer peripheral side in the radial direction as viewed in the axial direction and a pair of holes extending in the axial direction or a pair of groove portions each arranged in the second pattern at the second angle.

Abstract: [Problem to be Solved] To provide a polymer material having cancer cell adhesion properties while having biocompatibility. [Means to Solve the Problem] A composition for cancer cell adhesion according to the present invention comprises a biocompatible copolymer comprising: at least one repeating unit (A) represented by the following formula (1): wherein R1 represents a methyl group or an ethyl group; and at least one repeating unit (B) represented by the following formula (2): wherein R2 represents an aliphatic hydrocarbon group.

Abstract: A motor includes a cylindrical rotor core, and a magnet group including first magnets and second magnets alternately arranged along a circumferential direction of the rotor core. A first magnetic flux line generated in the first magnets extends along a radial direction of the rotor core, and a second magnetic flux line generated in the second magnets is inclined with respect to the first magnetic flux line. The rotor core includes an inner portion located on a radially inner side of the magnet group and an outer portion located on a radially outer side of the magnet group. The outer portion includes a first iron core that covers the first magnet from the radially outer side, and a second iron core that covers at least a portion of the second magnet in the central axis direction of the rotor core from the radially outer side.