Abstract: A cogging torque in a rotary electric machine is sufficiently reduced. The rotor core includes a magnetic pole having the base formed on the outer peripheral side of the storage space. A plurality of magnetic poles are provided in the circumferential direction, and include the first protrusion protruding from the base in one circumferential direction along the outer periphery of the rotor core, and the second protrusion which is provided on the opposite side to with the base interposed and protrudes from the base along the outer periphery of the rotor core in the other circumferential direction. At least one of the first protrusion and the second protrusion is located on the outer peripheral side from the first line segment which is a virtual line connecting the end of the first protrusion and the end of the second protrusion, and is provided such that the space is provided with respect to the first line segment.

Abstract: A torque ripple in a rotary electric machine is sufficiently reduced. At least two of the plurality of laminated plates in the rotor core include a magnetic pole having the base formed on the outer peripheral side of the storage space, and a bridge part connected to the magnetic pole. A plurality of magnetic poles are provided in the circumferential direction, and the first space is formed between the bases of a pair of magnetic poles adjacent in the circumferential direction. The q-axis outer peripheral portion, which is located between the pair of circumferentially adjacent magnetic poles and is in contact with the first space, is provided on the inner peripheral side of the base. The base includes the side surface portion which is in contact with the first space, and the protrusion which is provided on the outer peripheral side of the side surface portion and protrudes in the circumferential direction with respect to the side surface portion.

Abstract: A cogging torque in a rotary electric machine is sufficiently reduced. The rotor core includes a magnetic pole having the base formed on the outer peripheral side of the storage space. A plurality of magnetic poles are provided in the circumferential direction, and include the first protrusion protruding from the base in one circumferential direction along the outer periphery of the rotor core, and the second protrusion which is provided on the opposite side to with the base interposed and protrudes from the base along the outer periphery of the rotor core in the other circumferential direction. At least one of the first protrusion and the second protrusion is located on the outer peripheral side from the first line segment which is a virtual line connecting the end of the first protrusion and the end of the second protrusion, and is provided such that the space is provided with respect to the first line segment.

Abstract: A torque ripple in a rotary electric machine is sufficiently reduced. At least two of the plurality of laminated plates in the rotor core include a magnetic pole having the base formed on the outer peripheral side of the storage space, and a bridge part connected to the magnetic pole. A plurality of magnetic poles are provided in the circumferential direction, and the first space is formed between the bases of a pair of magnetic poles adjacent in the circumferential direction. The q-axis outer peripheral portion, which is located between the pair of circumferentially adjacent magnetic poles and is in contact with the first space, is provided on the inner peripheral side of the base. The base includes the side surface portion which is in contact with the first space, and the protrusion which is provided on the outer peripheral side of the side surface portion and protrudes in the circumferential direction with respect to the side surface portion.

Abstract: An electrically driven motor includes a motor rotor having a rotor core and a plurality of permanent magnets attached onto an outer circumferential portion of the rotor core. The electrically driven motor also includes a stator having a plurality of slots. In the electrically driven motor, a plurality of projections rotor teeth are disposed at positions of the outer circumferential portion of the rotor core which are spaced apart from each other by a predetermined interval of distance and which include a magnetic pole center of at least one permanent magnet. The plurality of rotor teeth extend all the way to a location of the teeth of the stator.

Abstract: A drive rotation shaft is rotatably supported by a first slide bearing between a rotor part and a pump rotor, and is rotatably supported by a second slide bearing on its distal end side of a pump rotor fixing part of the drive rotation shaft. Working oil is supplied to the first slide bearing and the second slide bearing. According to this configuration, since the distal end side of the drive rotation part is rotatably supported by the second slide bearing, inclination of the drive rotation shaft is restricted by an inner peripheral surface of the second slide bearing, thereby suppressing occurrence of noise.

Abstract: An electric oil pump is provided to including: (i) a pump part housed in a pump part-accommodating portion formed in a metal pump housing; (ii) an electric motor part housed in an electric motor part-accommodating portion formed in the pump housing; and (iii) a drive control part having (a) a control part case fastened to the pump housing and formed of synthetic resin, (b) a control board for supplying a driving current to the electric motor part, and (c) a metal control part cover fastened to the control part case and accommodating the control board. In this pump, the control part cover and the pump housing are covered with an oxide film having corrosion resistance and heat resistance at least at their outer surface, and the pump housing provided with the oxide film is fixed to an automatic transmission casing in a manner to be immersed in a hydraulic oil.

Abstract: A drive rotation shaft is rotatably supported by a first slide bearing between a rotor part and a pump rotor, and is rotatably supported by a second slide bearing on its distal end side of a pump rotor fixing part of the drive rotation shaft. Working oil is supplied to the first slide bearing and the second slide bearing. According to this configuration, since the distal end side of the drive rotation part is rotatably supported by the second slide bearing, inclination of the drive rotation shaft is restricted by an inner peripheral surface of the second slide bearing, thereby suppressing occurrence of noise.

Abstract: In an electrically driven motor and an electrically driven pump using the electrically driven motor which can reduce a cogging torque in a simple structure not using a magnetized skew, the electrically driven motor includes a motor rotor in which a plurality of permanent magnets are attached onto an outer circumferential portion of rotor core and a stator having a plurality of slots and a plurality of projections are disposed on positions including a magnetic pole center of at least one of the permanent magnets at predetermined intervals of distance in a peripheral direction of an outer circumferential portion of the rotor core.