A linear generator includes one or more helices, and one or more magnet members movable relative to a first helix to generate electric energy within the first helix. The first helix includes a first coil. The first helix and/or the magnet members have a density less than that of water such that the first helix and/or the magnet members have buoyant properties when the linear generator is at least partially submerged in the water.

A housing for a rotary electric machine having stacked laminations forming a stator core includes a first portion forming a slip fit with a first series of the stacked laminations. A second portion forms an interference fit with a second series of the stacked laminations.

A connecting piece for connecting a hollow electric conductor and a coolant line includes a fluid-tight housing (1) having a hollow inner space; a hollow conductor opening (2) in the housing (1); a coolant line opening (3) in the housing (1); and an electrically insulating separating element (4). The inner space hydraulically connects the hollow conductor opening (2) and the coolant line opening (3). The housing (1) includes a coolant line-side housing part (5) and a hollow conductor-side housing part (6). The separating element (4) is arranged between the coolant line-side housing part (5) and the hollow conductor-side housing part (6), and has a coolant channel (7). The separating element (4) is formed as a ball.

A connecting piece for connecting a hollow electric conductor and a coolant line includes a fluid-tight housing (1) having a hollow inner space; a hollow conductor opening (2) in the housing (1); a coolant line opening (3) in the housing (1); and an electrically insulating separating element (4). The inner space hydraulically connects the hollow conductor opening (2) and the coolant line opening (3). The housing (1) includes a coolant line-side housing part (5) and a hollow conductor-side housing part (6). The separating element (4) is arranged between the coolant line-side housing part (5) and the hollow conductor-side housing part (6), and has a coolant channel (7). The separating element (4) is formed as a ball.

The invention relates to a winding piece (1), in particular in the shape of a hairpin, which is provided to be inserted into the grooves (7) of an electrical machine, comprising two limbs (2) and a curved transition region (3), which connects the two limbs (2) to each other. According to the invention, the limbs (2) each have a first portion (4) having a profile, which is adjusted to the cross-section of the groove (7), and an end portion (5), which has a round profile, wherein the winding piece (1) is formed as a hollow conductor, which has a penetrating channel (9), through which a coolant can be led.

The invention relates to a winding piece (1), in particular in the shape of a hairpin, which is provided to be inserted into the grooves (7) of an electrical machine, comprising two limbs (2) and a curved transition region (3), which connects the two limbs (2) to each other. According to the invention, the limbs (2) each have a first portion (4) having a profile, which is adjusted to the cross-section of the groove (7), and an end portion (5), which has a round profile, wherein the winding piece (1) is formed as a hollow conductor, which has a penetrating channel (9), through which a coolant can be led.

The present invention provides an insulator which comprises: an inner guide; an outer guide; and a body connecting the inner guide and the outer guide, and having a coil wound thereon, wherein a rotatable wing is connected to an outer surface of the outer guide.

An electrical motoris provided, comprising a rotor (2), a stator (3), and a housing (4) enclosing the rotor (2) and the stator (3). The stator (3) comprises at least one end turn connection device (6) arranged on one axial end thereof, and a plurality of hollow winding pins (5) extending through the at least one end turn connection device (6).

An electrical motoris provided, comprising a rotor (2), a stator (3), and a housing (4) enclosing the rotor (2) and the stator (3). The stator (3) comprises at least one end turn connection device (6) arranged on one axial end thereof, and a plurality of hollow winding pins (5) extending through the at least one end turn connection device (6).

An electric machine comprising a rotor, a stator, a plurality of bare conductors forming a plurality of windings in at least one of the stator and the rotor, and a fluid in direct physical contact with a plurality of outer surfaces of the plurality of bare conductors, wherein the fluid is electrically insulating and provides direct fluid cooling, to provide cooling for the plurality of bare conductors and electrical insulation between consecutive bare conductors of the plurality of bare conductors.