Patents Assigned to Prippell Technologies, LLC
  • Patent number: 11387030
    Abstract: A fluid-cooled magnetic element. A plurality of coils is arranged in a non-toroidal configuration. Each coil may be a hollow cylinder, formed by winding a rectangular wire into a roll. The coils alternate with planer spacers. The coils may alternate in winding orientation, and the inner end of each coil may be connected, through a connection pin, to the inner end of an adjacent coil. Small gaps are formed between the coils and the spacers, e.g. as a result of each spacer having, on its two faces, a plurality of raised ribs, against which the coils abut. Cooling fluid flows through the gaps to cool the coils.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: July 12, 2022
    Assignee: Prippell Technologies, LLC
    Inventors: Eric E. Rippel, Wally E. Rippel
  • Patent number: 10600548
    Abstract: A toroidal magnetic element. A plurality of coils is arranged in a toroidal configuration. Each coil may be a hollow cylinder, formed by winding a rectangular wire into a roll. The coils alternate with spacers, each of which may be a wedge. The coils may alternate in winding orientation, and the inner end of each coil may be connected, through a connection pin, to the inner end of an adjacent coil. Small gaps are formed between the coils and the wedges, e.g. as a result of each wedge having, on its two faces, a plurality of raised ribs, against which the coils abut. Cooling fluid flows through the gaps to cool the coils.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: March 24, 2020
    Assignee: Prippell Technologies, LLC
    Inventors: Wally E. Rippel, Eric E. Rippel
  • Patent number: 10473222
    Abstract: A low drag fluid seal. The fluid seal includes a lip separated from the rotor shaft, during operation, by a gap, the gap being sufficient narrow, radially, to prevent liquid from seeping through the gap at an unacceptable rate, but sufficiently wide, radially, to avoid unacceptably high viscous drag. Fluid that seeps through the gap accumulates in a recovery cavity and is recovered.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: November 12, 2019
    Assignee: Prippell Technologies, LLC
    Inventors: Eric E. Rippel, Wally E. Rippel
  • Patent number: 10411563
    Abstract: A system for cooling the teeth of an electric machine stator. The stator includes a stator core that may be formed of a plurality of laminations. Each lamination has a plurality of back iron apertures, a plurality of tooth tip apertures, and a plurality of elongated apertures. When the laminations are assembled to form the stator core, the back iron apertures align to form back iron inlet channels and back iron outlet channels, and the tooth tip apertures align to form tooth tip cooling channels. The elongated apertures are L-shaped and connect the back iron inlet channels and back iron outlet channels to the tooth tip channels. Cooling fluid may flow, for example, axially through a back iron inlet channel, azimuthally and radially inward through an elongated aperture to a tooth tip, axially along a tooth tip channel, and to a back iron outlet channel through another elongated aperture.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: September 10, 2019
    Assignee: Prippell Technologies, LLC
    Inventors: Wally E. Rippel, Eric Rippel
  • Patent number: 10374489
    Abstract: A system for cooling the teeth of an electric machine stator. The stator includes a stator core that may be formed of a plurality of laminations. Each lamination has a plurality of back iron apertures, a plurality of tooth tip apertures, and a plurality of elongated apertures. When the laminations are assembled to form the stator core, the back iron apertures align to form back iron inlet channels and back iron outlet channels, and the tooth tip apertures align to form tooth tip cooling channels. The elongated apertures are L-shaped and connect the back iron inlet channels and back iron outlet channels to the tooth tip channels. Cooling fluid may flow, for example, axially through a back iron inlet channel, azimuthally and radially inward through an elongated aperture to a tooth tip, axially along a tooth tip channel, and to a back iron outlet channel through another elongated aperture.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: August 6, 2019
    Assignee: Prippell Technologies, LLC
    Inventors: Wally E. Rippel, Eric Rippel
  • Patent number: 10060682
    Abstract: A wound strip structure for efficient heat transfer. The structure includes one or more edge-wound or face-wound strips. At least one of the strips has a plurality of turns and a plurality of apertures, and an aperture of a turn of the strip overlapping an aperture of an adjacent turn, of the strip or of another strip, to form a portion of a fluid channel. The fluid channel may be used to conduct a cooling fluid to cool the structure.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: August 28, 2018
    Assignee: Prippell Technologies, LLC
    Inventors: Wally E. Rippel, Eric Rippel
  • Patent number: 10030777
    Abstract: A low drag fluid seal. The fluid seal includes a rigid lip separated from the rotor shaft by a gap, the gap being sufficient narrow, radially, to prevent liquid from seeping through the gap at an unacceptable rate, but sufficiently wide, radially, to avoid unacceptably high viscous drag. Fluid that seeps through the gap accumulates in a recovery cavity and is recovered by a scavenge pump.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: July 24, 2018
    Assignee: Prippell Technologies, LLC
    Inventors: Wally E. Rippel, Eric E. Rippel
  • Patent number: 9985500
    Abstract: An electric machine with fluid cooling. The electric machine includes a stator, the stator having a stator winding and a stator core having a plurality of stacked magnetic laminations, each of the laminations of the stator core having a plurality of apertures overlapping to form a plurality of stator fluid channels, a stator fluid channel of the plurality of stator fluid channels being not entirely axial. The electric machine further includes a rotor, the rotor having a shaft and a rotor core having a plurality of stacked magnetic laminations, each of the laminations of the rotor core having a plurality of apertures overlapping to form a plurality of rotor fluid channels, and a rotary fluid coupling in fluid communication with the rotor fluid channels. The rotor and the stator are configured to form a magnetic circuit comprising an air gap between the rotor and the stator.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: May 29, 2018
    Assignee: Prippell Technologies, LLC
    Inventors: Wally E. Rippel, Eric E. Rippel