An insulation system for an electric machine coil includes the following layers situated in sequence over an insulated conductor: a first corona shield tape, a stress grading tape, a second corona shield tape having a first overlap length with the stress grading tape and a second greater overlap length with the first corona shield tape, an insulation tape, and a sealing tape.

An insulation system for an electric machine coil includes the following layers situated in sequence over an insulated conductor: a first corona shield tape, a stress grading tape, a second corona shield tape having a first overlap length with the stress grading tape and a second greater overlap length with the first corona shield tape, an insulation tape, and a sealing tape.

Electrical windings for a low-pressure environment are provided. The electrical windings include a body having an aperture and electrical conductors wound about the aperture in the body; a conductive layer at the body, the conductive layer arranged to electrically shield the electrical conductors; electrical connectors at one or more external sides of the body, the electrical connectors electrically connected to the electrical conductors; an insulating housing containing electrical connections between the electrical connectors and the electrical conductors; a conducting faceplate at the insulating housing, grounding portions of the electrical connectors attached to the conducting faceplate; and a conductive coating on the insulating housing, the conductive coating electrically connected to the conducting faceplate and the conductive layer.

A system (100), electromagnetic actuator (102) and track (101) for braking are provided. The actuator (102) includes pole portions (109) extending from back-iron portions. Respective longitudinal axes (104) of the pole portions (109) are arranged about parallel to one another and about perpendicular to a common movement axis (104). A pole pitch of the pole portions (109) is selected to induce eddy currents in a segmented track (101), such that the eddy currents are present in a skin depth at more than one surface of segments (105) of the segmented track (101) when the pole portions (109) are moving at given speeds. Eddy current generated losses occupy about an entirety of a volume of a segment (105) of the track (101) below a given intermediate speed, and the eddy current generated losses occupy at least one third of the volume of the segment (105) at a given maximum speed greater than the given intermediate speed. Individually controllable electrical windings are around respective pole portions (109).

An electromagnetic actuator for generating force is provided. The electromagnetic actuator includes a ferromagnetic body extending along a longitudinal axis, the ferromagnetic body comprising: a back-iron portion; and a pair of pole portions, extending from the back-iron portion, the back-iron portion connecting the pair of pole portions. The electromagnetic actuator further includes one or more magnetic-flux changing components at the pole portions, a respective magnetic-flux changing component located at a respective pole face, the respective magnetic-flux changing component configured to change magnetic flux density at a respective track-facing surface relative to the respective pole face. The electromagnetic actuator further includes electrical windings around the pole portions.

Replaceable windings (101) for an electromagnetic machine (100) are provided. A replaceable winding (101) comprises a body (107) having a longitudinal axis (105), the body (107) comprising opposing surfaces along the longitudinal axis (105). The replaceable winding (101) further comprises an aperture (119) through the body (107), between the opposing surfaces, the aperture (119) having generally parallel internal sides about perpendicular to the opposing surfaces of the body (107), the aperture (119) configured to removably received a pole portion (109) of the electromagnetic machine (100). The replaceable winding (101) further comprises electrical conductors wound about the aperture (119) in the body (107). The replaceable winding (101) further comprises electrical connectors (123) at one or more external sides of the body (107), the electrical connectors (123) connected to the electrical conductors.

Various embodiments include a sprayable formulation for production of a multilayer insulation for an electrical machine, especially a rotating electrical machine in the high-voltage or mid-voltage sector, for example a generator, transformer, which is subjected to higher rated voltages at operating voltages, i.e., for example, over and above 1 kV or more. The invention also relates to an electrical machine comprising such an insulation; the invention finally relates to a method of producing the multilayer insulation. This comprises spraying of various formulations with or without intermediate, especially metallic, interfaces and is automatable.

Various embodiments include a sprayable formulation for production of a multilayer insulation for an electrical machine, especially a rotating electrical machine in the high-voltage or mid-voltage sector, for example a generator, transformer, which is subjected to higher rated voltages at operating voltages, i.e., for example, over and above 1 kV or more. The invention also relates to an electrical machine comprising such an insulation; the invention finally relates to a method of producing the multilayer insulation. This comprises spraying of various formulations with or without intermediate, especially metallic, interfaces and is automatable.

A stator includes a stator core, and a coil mounted on the stator core and having an insulating film, at least a part of the insulating film being coated with a protective paint, wherein the insulating film has a vacancy, and the vacancy is formed by a hollow capsule. In addition, the protective paint has a powder, and an internal form of the vacancy is smaller than an external form of the powder.

A stator includes a stator core, and a coil mounted on the stator core and having an insulating film, at least a part of the insulating film being coated with a protective paint, wherein the insulating film has a vacancy, and the vacancy is formed by a hollow capsule. In addition, the protective paint has a powder, and an internal form of the vacancy is smaller than an external form of the powder.