The disclosure relates to an actuator module at least consisting of an electrical machine and an application module. The electrical machine consists of a stator and a rotor, the rotor is slidably mounted directly on the stator, and the stator and the rotor are surrounded with plastic at least in the region of the inner bearing face. The plastic coating of the cylindrical rotor outer face has structures which extend as a spiral continuously over the height of the rotor.

A submersible pump electrical motor has a stator with a stator bore, a shaft with rotor sections in the stator bore, and a shaft bearing between rotor sections. The bearing has a bearing body having a hub and centralizing arms circumferentially spaced around the hub. Each of the arms curves and is biased against the stator bore wall. A tab on at least one of the arms engages a slot in the stator bore wall. The bearing body, the hub, and the arms are formed of a single-piece monolithic metal that undergoes elastic deflection of the arms when the bearing body is installed in the stator bore.

Systems and methods for increasing hydrocarbon production using an electrical submersible pump are described. The methods typically include, for example, configuring an electrical submersible pump comprising a gas separator to induce a gas lift effect in a well comprising a tubing within a casing. Hydrocarbon production from the well is therefore increased using the electrical submersible pump.

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.

Provided is a motor including a shaft welded to or fused with a metallic member. The motor includes a shaft (5) made of metal and a base including a metal board (81) covered with a coating layer (83). The coating layer (83) has an opening (83b), and the metal board (81) includes a recessed part (84) exposed through the opening (83b). An outer peripheral part of the shaft (5) and the recessed part (84) are fused or welded together.

The disclosure relates to an actuator module at least consisting of an electrical machine and an application module. The electrical machine consists of a stator and a rotor, the rotor is slidably mounted directly on the stator, and the stator and the rotor are surrounded with plastic at least in the region of the inner bearing face. The plastic coating of the cylindrical rotor outer face has structures which extend as a spiral continuously over the height of the rotor.

An electric motor, e.g., for a motor vehicle, includes an internal rotor arranged rotatably supported about a rotation axis relative to an external stator. The internal rotor includes a pot-shaped receiving sleeve arranged around a rotor shaft and an armature unit received in the rotor receiving sleeve. The armature unit includes a multiple-layered metal sheet assembly and a plurality of permanent magnets. The plurality of permanent magnets are arranged with spacing from each other in a peripheral direction at a radial outer side of the metal sheet assembly. The sheet metal assembly includes at least one retention device disposed integrally thereon in an intermediate space between adjacent permanent magnets, structured and arranged to reduce slippage of the permanent magnets in the peripheral direction.

A lubricant supported electric motor includes a stator presenting an outer raceway and a rotor extending along an axis and rotatably disposed within the stator. The rotor presents an inner raceway disposed in spaced relationship with said outer raceway to define at least one hydrostatic support chamber disposed therebetween. A lubricant is disposed in the hydrostatic support chamber for supporting the rotor within the stator. A monitoring port is disposed in fluid communication with the at least one hydrostatic support chamber, and a sensor is coupled with the monitoring port for monitoring an operating characteristic of the lubricant disposed in said at least one hydrostatic support chamber. This monitored operating characteristic is then used to determine a real-time operating condition of the lubricant supported electric motor.

A lubricant supported electric motor includes a stator presenting a stator raceway, and a rotor movable relative to the stator about an axis. The rotor presents a rotor raceway disposed in radially spaced and opposing relationship with the stator raceway to define a gap therebetween. A lubricant is disposed in the gap for supporting the rotor relative to the stator. The stator raceway includes a bearing structure comprised of a plurality of hydrodynamic surfaces aligned in parallel relationship along the stator raceway and a plurality of hydrostatic pockets disposed in radially recessed relationship relative to the hydrodynamic surfaces.

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.