A hybrid gun device composed of two barrels (1,10) that accept energy from combustion of standard propellant (6), one barrel (10) being operative to produce a high intensity electric current to add accelerating energy to a projectile (7) in the second barrel (1) and at least one coil (8) stage to convert energy between electrical and kinetic to cause the projectile (7) to be launched at hypervelocity.

A motor control apparatus includes a motor, a motor controller, and a connection line. The motor is mounted to a vehicle and has a metal housing. The motor controller is separately provided with the motor, includes a housing and a circuit portion, is connected to the motor through a load line, and drives the motor by a drive current transmitted through the load line. A ground line of the circuit portion is connected to a body of the vehicle as a body earth. The connection line directly connects the metal housing of the motor and the circuit portion of the motor controller without through the housing of the motor controller.

A motor control apparatus includes a motor, a motor controller, and a connection line. The motor is mounted to a vehicle and has a metal housing. The motor controller is separately provided with the motor, includes a housing and a circuit portion, is connected to the motor through a load line, and drives the motor by a drive current transmitted through the load line. A ground line of the circuit portion is connected to a body of the vehicle as a body earth. The connection line directly connects the metal housing of the motor and the circuit portion of the motor controller without through the housing of the motor controller.

An electric machine comprising a stator (50), a rotor (29) radially inward of the stator and comprising a plurality of surface permanent magnets (44) and a rotor sleeve (46) surrounding the rotor. The rotor sleeve comprises a plurality of layers of fibre reinforced matrix material (56, 60). The rotor sleeve defines a rotor sleeve radius to radial thickness ratio (r:t) between 20 and 40, and the electric machine has a maximum rotor rotational speed greater than 15000 RPM.

An electric machine comprising a stator (50), a rotor (29) radially inward of the stator and comprising a plurality of surface permanent magnets (44) and a rotor sleeve (46) surrounding the rotor. The rotor sleeve comprises a plurality of layers of fibre reinforced matrix material (56, 60). The rotor sleeve defines a rotor sleeve radius to radial thickness ratio (r:t) between 20 and 40, and the electric machine has a maximum rotor rotational speed greater than 15000 RPM.

A method of molding a resin casing covering a stator of a motor may include preparing first and second molds; disposing the stator in the first mold; combining the molds; pouring a resin into the cavity; curing the resin; separating the molds; and taking the stator and resin casing from the mold. The stator may include a core, an insulator, and a coil. The core may include a core back surrounding and teeth that extend inward from the core back. The insulator may include wall portions inside the coil. The wall portions may be provided around the teeth and extend toward one side in an axial direction. One of the molds may include cylindrical surfaces contacting inner end faces of the teeth. The first mold may include wall supporting surfaces contacting or facing the inner surfaces of the wall portions. The wall supporting surfaces may be outside the cylindrical surfaces.

An electric machine includes a stator. The stator has a plurality of slots defined between a plurality of laminated protrusions. A plurality of wire windings is disposed in the slots. The wire windings form end windings at respective ends of the stator. A cover is disposed about the end windings. A coolant chamber is defined between an inner surface of the cover and the stator. The cover includes a plurality of flow disruption members extending from the inner surface into the coolant chamber.

An electric machine includes a stator. The stator has a plurality of slots defined between a plurality of laminated protrusions. A plurality of wire windings is disposed in the slots. The wire windings form end windings at respective ends of the stator. A cover is disposed about the end windings. A coolant chamber is defined between an inner surface of the cover and the stator. The cover includes a plurality of flow disruption members extending from the inner surface into the coolant chamber.

A motor assembly including a housing with a motor portion having an opening for receiving a motor housing/stator assembly, rotor assembly, front and rear end caps and bearings, an encoder coupled to the motor, and an rear cover for enclosing the opening of the motor portion of the housing, the rear cover at least partially surrounding the encoder. At least one of an interior surface of the rear cover or an exterior surface of the encoder comprise a material having an emissivity greater than 0.9.

A motor assembly including a housing with a motor portion having an opening for receiving a motor housing/stator assembly, rotor assembly, front and rear end caps and bearings, an encoder coupled to the motor, and an rear cover for enclosing the opening of the motor portion of the housing, the rear cover at least partially surrounding the encoder. At least one of an interior surface of the rear cover or an exterior surface of the encoder comprise a material having an emissivity greater than 0.9.