The present invention may provide a motor comprising: a shaft; a rotor coupled to the shaft; and a stator disposed outside the rotor, wherein the rotor comprises: a bearing holder including a cylindrical portion and a flange portion; a first bearing and a second bearing which are arranged on the cylindrical portion; a rotor core including a hole coupled to the cylindrical portion; and a magnet coupled to the rotor core, wherein the rotor core includes a pocket portion, the magnet is disposed in the pocket portion, the flange portion is disposed on the rotor core and the magnet, and the cylindrical portion includes a first region on which the first bearing is disposed and a second region on which the second bearing is disposed, wherein the first region and the second region of the cylindrical portion are inserted into the hole of the rotor core.

An electrical machine includes a stator with a stator body supporting an electrical stator and a rotor. The rotor is supported by a bearing having a radial bearing section forming a radial gas bearing and an axial bearing section forming an axial gas bearing, the stator side parts of these bearing sections being a stator side radial bearing part and a stator side axial bearing part that are rigidly connected to one another and together form a stator bearing structure. The stator bearing structure is mounted to the other parts of the stator by either the stator side radial or axial bearing part being rigidly mounted to these other parts, and the other bearing part are connected to these other parts by an elastic support or not at all.

A gear device includes a housing, a cover, and a gear. The cover covers an opening of the housing. The gear is accommodated in the housing. One of the housing and the cover includes a projection projected toward the gear and having a center axis that extends along a rotation axis of the gear. The gear includes a recess that receives the projection.

A lubricant supported electric motor includes an outer stator and an inner stator each extending around an axis in radially spaced relationship with one another. A rotor is rotatably disposed between the inner and outer stators to define an inner gap extending radially between the rotor and the inner stator and an outer gap extending radially between the rotor and the outer stator. A lubricant is disposed in both of the inner and outer gaps for supporting the rotor radially between the inner and outer stators. The lubricant supported motor with a two-sided radial flux configuration results in improved rotor-to-stator system stiffness to allow the lubricant supported electric motor to be used in high shock and high vibration environments, while also providing high torque in a small and lightweight design package.

A common lubrication and cooling system includes a lubricant-supported electric motor including a stator and a rotor defining a gap therebetween, with a liquid coolant disposed in the gap for supporting the rotor while allowing the rotor to rotate relative to the stator. The common lubrication and cooling system also includes a liquid-cooled inverter. The liquid-cooled inverter includes a plurality of switch devices configured to supply an alternating current (AC) power to the lubricant-supported electric motor for driving the rotor to rotate. The liquid-cooled inverter also includes a first heatsink mechanically connected to the plurality of switch devices. The liquid-cooled inverter also includes an inverter passageway configured transmit the liquid coolant between the lubricant-supported electric motor and into fluid communication with the first heatsink for transmitting heat away from the first heatsink.

A motor includes a stationary unit and a rotation unit. The rotation unit includes a rotor hub, an annular body, and a clamp. The rotor hub is mounted with a first magnet opposite to the stator. The annular body is supported on an outer circumferential portion of the rotor hub. The clamp is directly or indirectly fixed to the rotor hub farther radially inside than the annular body, and presses the annular body to an axially lower side. The rotor hub includes a flange that expands radially outside from at least a portion excluding an upper end portion. On a surface of the clamp, a pattern to be detected to detect rotation of the rotation unit positioned in a circumferential direction with the central axis as the center is provided. The annular body is sandwiched between the flange and the clamp in an axial direction.

An electrical machine includes a stator with a stator body supporting an electrical stator and a rotor. The rotor is supported by a bearing having a radial bearing section forming a radial gas bearing and an axial bearing section forming an axial gas bearing, the stator side parts of these bearing sections being a stator side radial bearing part and a stator side axial bearing part that are rigidly connected to one another and together form a stator bearing structure. The stator bearing structure is mounted to the other parts of the stator by either the stator side radial or axial bearing part being rigidly mounted to these other parts, and the other bearing part are connected to these other parts by an elastic support or not at all.

An electric motor is described comprising a rotor, a shaft integral with the rotor to transfer torque to a load, a stator coaxially crossed by the shaft. To improve the thermal resistance, a plain bearing placed between the stator and the shaft, and a lubricating fluid circuit configured to transport lubricating fluid and wet a contact surface between the stator and the shaft with the fluid.

The present inventions include a rotating electromagnetic machine such as a motor or generator wherein changes of flux direction adjacent the air gap are avoided. The disclosed improvements apply to permanent magnet alternators, induction motors and generators, doubly fed induction generators, and the like. Adaptation of coils to and fixation within the required slot geometries are disclosed. Excitation systems co-located within the primary rotor core and primary stator core are also disclosed. The use of rubber vulcanized to the rotor in conjunction with a stainless steel rotor sleeve is also disclosed.

A lubricant supported electric motor including a stator presenting a stator raceway, and a rotor extending along an axis and rotatable relative to the stator. The rotor presents a rotor raceway disposed in spaced relationship with the stator raceway to define a gap there between. A lubricant is disposed in the gap for supporting the rotor relative to the stator. The rotor includes a plurality of rotor poles arranged adjacent the rotor raceway in circumferentially spaced relationship with one another, and the stator includes a plurality of stator poles extending radially towards the rotor in circumferentially spaced relationship with one another along the stator raceway. A plurality of stator coil windings are wrapped around the plurality of stator poles and individually controllable for generating a magnetic force to center the rotor within the stator with carefully-timed adjustments to magnetic fields generated by the stator.