摘要:
A high power density generator contains an armature structure having a plurality of conductors and at least one heat transfer tube thermally coupled to the conductors. The tube is hollow so as to allow a heat transfer fluid to pass through it. The tube is made of a material having a thermal conductivity λ of at least 20 W/mK, an electrical breakdown strength of at least 60 V/mil, and a mechanical strength adequate for handling, manufacturing and operation. In an embodiment of the invention, the tube is made of a ceramic material.
摘要:
A high power density generator contains an armature structure having a plurality of conductors and at least one heat transfer tube thermally coupled to the conductors. The tube is hollow so as to allow a heat transfer fluid to pass through it. The tube is made of a material having a thermal conductivity λ of at least 20 W/mK, an electrical breakdown strength of at least 60 V/mil, and a mechanical strength adequate for handling, manufacturing and operation. In an embodiment of the invention, the tube is made of a ceramic material.
摘要:
A cooling device comprises an upper surface configured to contact the baseplate, an inlet manifold configured to receive a coolant, an outlet manifold configured to exhaust the coolant, and at least one set of millichannels in the upper surface. The at least one set of the millichannels defines at least one heat sink region with at least one groove about one or more millichannels in the respective heat sink region with the groove configured to receive a seal. The at least one heat sink region establishes direct contact of the coolant with the baseplate, and the millichannels are configured to receive the coolant from the inlet manifold and to deliver the coolant to the outlet manifold. An apparatus and a stack are also presented.
摘要:
A PM machine is provided. The PM machine includes a stator including a stator core, wherein the stator core defines multiple step-shaped stator slots. The stator includes multiple fractional-slot concentrated windings wound within the step-shaped stator slots. The stator also includes at least one cooling tube disposed around the windings. The stator further includes a first insulation layer disposed around the cooling tube. The stator also includes a second insulation layer disposed around the first insulation layer. The stator further includes at least one slot wedge configured to close an opening of a respective one of the step-shaped stator slots, wherein the slot wedge is further configured to adjust a leakage inductance in the PM machine. The PM machine also includes a rotor having a rotor core and disposed outside and concentric with the stator, wherein the rotor core includes a laminated back iron structure disposed around multiple magnets.
摘要:
Rotor and stator assemblies that utilize magnetic bearings for supporting the rotor shaft during operation can be suitably used in corrosive environments, such as sour gas. The rotor and stator assemblies include NACE compliant magnetic bearing arrangements for sour gas applications. In one embodiment, a rotor shaft assembly for a magnetic bearing arrangement comprises a rotor shaft formed of a ferromagnetic material comprising a plurality of rotor laminations disposed on the rotor shaft; and a barrier layer formed on selected exposed surfaces of the rotor shaft, wherein the barrier layer is effective to resist corrosion relative to the surface without the barrier layer.
摘要:
An apparatus, such as an electrical machine, is provided. The apparatus can include a rotor defining a rotor bore and a conduit disposed in and extending axially along the rotor bore. The conduit can have an annular conduit body defining a plurality of orifices disposed axially along the conduit and extending through the conduit body. The rotor can have an inner wall that at least partially defines the rotor bore. The orifices can extend through the conduit body along respective orifice directions, and the rotor and conduit can be configured to provide a line of sight along the orifice direction from the respective orifices to the inner wall.
摘要:
A segmented cooling system for an electric machine is provided. The segmented cooling system includes multiple cooling subsystems coupled to respective multiple stator segments in the electric machine, wherein the multiple cooling subsystems directs fluid flow towards one or more regions of interest within the respective multiple stator segments.
摘要:
A stator assembly includes a segmented stator having stator portions. Each stator portion includes stator laminations having stator windings, spacer plates having a portion embedded within the stator laminations, and structural plates having a portion embedded within the stator laminations. The portion of each of the spacer plates and each of the structural plates has notch-like structures that create openings to allow a cooling medium to flow between the notch-like structures to provide radial cooling of the stator windings. Connectors are provided to connect the stator portions of the segmented stator together.
摘要:
A device, such as an absorption chiller sub-system, is provided. The absorption chiller sub-system can include an evaporator and an absorber. The evaporator can be configured to receive a liquid first working fluid and to produce first working fluid vapor. The absorber can be configured to receive and combine first working fluid vapor and a second working fluid, for example, so as to release thermal energy. A divider having opposing first and second sides in respective fluid communication with the evaporator and the absorber can also be included. The divider can be configured to allow first working fluid vapor to pass therethrough between the first and second sides and to inhibit movement of liquid first working fluid therethrough between the first and second sides. Associated systems and methods are also provided.
摘要:
An electrical machine comprising a rotor is presented. The electrical machine includes the rotor disposed on a rotatable shaft and defining a plurality of radial protrusions extending from the shaft up to a periphery of the rotor. The radial protrusions having cavities define a fluid path. A stationary shaft is disposed concentrically within the rotatable shaft wherein an annular space is formed between the stationary and rotatable shaft. A plurality of magnetic segments is disposed on the radial protrusions and the fluid path from within the stationary shaft into the annular space and extending through the cavities within the radial protrusions.