A stator includes a core and a coolant jacket. The core has an outer surface extending about a rotation axis and defining one or more surface discontinuity within the outer surface. The coolant jacket is deposited on the outer surface of the core and has two or more layers conformally disposed on the outer surface of the core, the coolant jacket inhabiting the one or more surface discontinuity. Electrical machines, motor-type electrical machines, and methods of making stators are also described.

An axial field rotary energy device can include a rotor comprising an axis of rotation and a magnet. In addition, a stator can be coaxial with the rotor. The stator can include a plurality of stator segments that are coupled together about the axis. Each stator segment can include a printed circuit board (PCB) having a PCB layer comprising a coil. Each stator segment also can include only one electrical phase. The stator itself can include one or more electrical phases.

An axial field rotary energy device can include a rotor comprising an axis of rotation and a magnet. In addition, a stator can be coaxial with the rotor. The stator can include a plurality of stator segments that are coupled together about the axis. Each stator segment can include a printed circuit board (PCB) having a PCB layer comprising a coil. Each stator segment also can include only one electrical phase. The stator itself can include one or more electrical phases.

A rotary machine includes a rotary shaft with an axial disc; an axial magnetic bearing which supports the rotary shaft; a motor which rotates the rotary shaft; a turbine impeller mounted on one end portion of the rotary shaft; a compressor impeller mounted on the other end portion; a cooling gas flow passage where a cooling gas for cooling the motor flows; and a housing for at least the motor, the axial magnetic bearing, and the axial disc. The motor includes a rotor unit on the rotary shaft, and a stator unit facing the rotor unit, the axial disc is equipped with a pair of load receiving surfaces sandwiched between the axial magnetic bearings, and the cooling gas flow passage is equipped with a first flow passage between the rotor unit and the stator unit, and a second flow passage extending along at least one of the load receiving surface.

A rotary machine includes a rotary shaft with an axial disc; an axial magnetic bearing which supports the rotary shaft; a motor which rotates the rotary shaft; a turbine impeller mounted on one end portion of the rotary shaft; a compressor impeller mounted on the other end portion; a cooling gas flow passage where a cooling gas for cooling the motor flows; and a housing for at least the motor, the axial magnetic bearing, and the axial disc. The motor includes a rotor unit on the rotary shaft, and a stator unit facing the rotor unit, the axial disc is equipped with a pair of load receiving surfaces sandwiched between the axial magnetic bearings, and the cooling gas flow passage is equipped with a first flow passage between the rotor unit and the stator unit, and a second flow passage extending along at least one of the load receiving surface.

A cooling arrangement for an electrical machine includes a stator including a stack defining a rotation axis and windings in the stack extending parallel to the rotation axis and forming end windings where the windings wrap around opposing axial ends of the stack. A rotor is included radially inward from the stator, configured to rotate about the rotation axis relative to the stator. An annular cooling jacket is included radially outward from the end windings at one axial end of the stack. The cooling jacket is configured to circulate cooling fluid in an internal flow passage therein in a circumferential direction to carry heat away from the end windings.

A cooling arrangement for an electrical machine includes a stator including a stack defining a rotation axis and windings in the stack extending parallel to the rotation axis and forming end windings where the windings wrap around opposing axial ends of the stack. A rotor is included radially inward from the stator, configured to rotate about the rotation axis relative to the stator. An annular cooling jacket is included radially outward from the end windings at one axial end of the stack. The cooling jacket is configured to circulate cooling fluid in an internal flow passage therein in a circumferential direction to carry heat away from the end windings.

A fluid apparatus includes a hydraulic machine, a rotary electric machine connected to the hydraulic machine, and a power conversion controller that converts power from the rotary electric machine. A non-normal operation is performed in a warning state that differs from a normal state in which a normal operation is continued and an anomalous state in which operation is stopped to continue a stopped condition.

A turbine and a turbine-generator device for use in electricity generation. The turbine has a universal design and so may be relatively easily modified for use in connection with generators having a rated power output in the range of 50 KW to 5 MW. Such modifications are achieved, in part, through use of a modular turbine cartridge built up of discrete rotor and stator plates sized for the desired application with turbine brush seals chosen to accommodate radial rotor movements from the supported generator. The cartridge may be installed and removed from the turbine relatively easily for maintenance or rebuilding. The rotor housing is designed to be relatively easily machined to dimensions that meet desired operating parameters.

A turbine and a turbine-generator device for use in electricity generation. The turbine has a universal design and so may be relatively easily modified for use in connection with generators having a rated power output in the range of 50 KW to 5 MW. Such modifications are achieved, in part, through use of a modular turbine cartridge built up of discrete rotor and stator plates sized for the desired application with turbine brush seals chosen to accommodate radial rotor movements from the supported generator. The cartridge may be installed and removed from the turbine relatively easily for maintenance or rebuilding. The rotor housing is designed to be relatively easily machined to dimensions that meet desired operating parameters.