A motor drive unit, in which an output end of a motor drive system using an electric motor as a power source and a rotator rotatably supported by a bearing unit are arranged side by side in an axial direction, and the output end of the motor drive system and the rotator are drivingly coupled in a relatively displaceable manner by a coupling member in which a plurality of couplers spaced apart in an axial direction are set. The bearing unit of the rotator is arranged such that a center of displacement of the rotator defined by the bearing unit is located between an arbitrary pair of couplers among the couplers.

An electric power supply system configured to supply electric power to an electrical load device in accordance with a current requirement. The electric power supply system includes an engine configured to output rotational power, a generator configured to receive the rotational power and to supply a current to the electrical load device. The generator includes a rotor, and a stator including a winding and a stator core with the winding wound thereon, a magnetic circuit for the winding passing through the stator core, and a supply current adjustment device configured to adjust magnetic resistance of the magnetic circuit for the winding, to thereby change an inductance of the winding to adjust the supplied current. The electric power supply system further includes a control device configured to control the engine to adjust the output rotational power and to control the supply current adjustment device to adjust the inductance of the winding.

A monorail vehicle includes two bogie assemblies supporting different ends of a chassis. Each bogie assembly includes guide wheels rotatably connected to a bogie frame, a wheel assembly for rolling along a top of a guide beam, and a drive unit. The drive unit includes an electric motor attached to the bogie frame via a mounting flange that is located within a first lateral half of the body, a brake unit, and a planetary gear assembly coupled to a rotor of the electric motor. The planetary gear assembly is located on a first side of the electric motor and the wheel assembly is mounted to an output of the planetary gear assembly. The drive unit is attached whereupon the wheel assembly may be dismounted from the drive unit in a direction of a second lateral half of the body without dismounting the drive unit from the bogie frame.

A self-balancing powered unicycle device (100) having a single hubless wheel is disclosed. The self-balancing powered unicycle device comprises: a single wheel (120); a motor adapted to drive the wheel; a balance control system adapted to maintain fore-aft balance of the unicycle device; at least one foot platform (165) for supporting a user of the unicycle device; and a casing (110) adapted to cover at least a portion of the outer rim of the wheel. The self-balancing powered unicycle device further comprises at least one energy storage device compartment (150A, 150B) protruding outward from a side of the casing (110) and adapted to house an energy storage device for powering the unicycle device.

An AC generator for a vehicle includes a housing having an inlet and an outlet, a stator fixed to the housing, a rotor disposed inside of the stator, a cooling fan fixed to a rotor, one or more cooling fins disposed in an air flow passage of a cooling air, and a rectifying element for rectifying an AC voltage generated by a stator winding. A positive-side cooling fin has a plurality of tapered first and second cooling holes penetrating in a thickness direction and serves as the air flow passages of the cooling air. Tapering directions of tapered surfaces extending in the thickness direction of each cooling hole in at least one pair of adjacent first and second cooling holes are reversed in the thickness direction with respect to each other.

A rotating electric machine includes a rotor rotatably supported and also including a magnet portion; a stator including a stator winding; and a plunger configured to displace the rotor and the stator relative to one another along an axial direction of the rotating electric machine. The stator includes a slotless structure in which at least one of no magnetic teeth and slot is provided. Thus, an attracting force acting between the magnet portion and the stator is weakened, thereby the rotor and the stator are easily displaceable relative to each other by the plunger.

A multi-phase multi-pole electric machine attached to a vehicle. The multi-phase multi-pole electric machine includes rotor, stator with five phase windings, machine controller, and torque sensors. The machine controller controls the flow of current. The torque sensors sense the torque exerted by the vehicle and transmits the information to the machine controller. The machine controller provides four degree of control through injection of five phase currents and thus providing higher torque.

A rotor for an electric motor which includes permanent magnets is formed so that the possibility of demagnetization of the permanent magnets is reduced. The rotor has at least one permanent magnet embedded in a magnetically conductive rotor core, and at least one flux path in the rotor core, for a magnetic flux caused by a magnetic stator field generated by a stator of the electric motor. The rotor core is realized, with respect to at least one of the flux paths, with a magnetically conductive shunt that bridges at least one of the permanent magnets for the magnetic flux that is caused by the stator field.

An encasement of an electric machine of an electrified vehicle is provided. The encasement may include a base sidewall, an inner sidewall, and an outer sidewall. The inner sidewall may extend in a circular pattern about the base sidewall. The outer sidewall may extend from the base sidewall and may be spaced apart from the inner sidewall to define a coolant channel at least partially surrounding end windings of a stator of the electric machine. The base sidewall may define features between the sidewalls to promote turbulence of coolant flowing through the coolant channel. The base sidewall may define a meandering trough between the sidewalls to form a predetermined coolant path relative to a location of the end windings.

In a motor for a vehicle, a protrusion portion is formed to protrude from a stator body of a stator. Therefore, an amount of a magnetic field emitted to a side of an occupant of a vehicle is suppressed. In addition, a reduction value of the magnetic field emitted to the side of the occupant of the vehicle is decided based on an amount of protrusion of the protrusion portion and a length of the protrusion portion in a circumferential direction of a rotation of a rotor.