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US 12,352,202 B2Granted
Electric turbocharger with cooling flow path
OwnerKoji Sakota, Yuji Sasaki +1inventors
InventorsKoji Sakota, Yuji Sasaki, Shun Nakayama
Life of this patent
Estimating the term…
Abstract
An electric turbocharger includes a motor including a stator, and a diffuser plate thermally coupled to an end surface of the stator to transfer heat from the stator to the diffuser plate. The diffuser plate forming a cooling flow path to circulate a cooling medium.
Claims17
An electric turbocharger comprising:
- a motor including a stator having a substantially cylindrical shape;
- an impeller that is rotatable via the motor;
- a compressor casing that accommodates the impeller, and that forms a scroll flow path surrounding the impeller;
- and
- a diffuser plate having a disk shape that includes a first plate member forming a first surface that is thermally coupled to an end surface of the stator, to transfer heat from the stator to the diffuser plate, and a second plate member forming a second surface that is opposite the first surface,
- wherein a thermal conductivity of the first plate member is different from a thermal conductivity of the second plate member,
- wherein the diffuser plate has a cooling flow path;
- wherein a diffuser flow path is formed between the second surface and the compressor casing to guide a fluid discharged from the impeller to the scroll flow path,
- wherein the diffuser plate forms an inlet hole for the cooling flow path and an outlet hole for the cooling flow path, that are located radially outwardly relative to an outer circumferential wall of the stator, and
- wherein the cooling flow path includes an annular portion that is fluidly coupled between the inlet hole and the outlet hole of the diffuser plate to direct a cooling medium from the inlet hole to the outlet hole via the annular portion.
7 more elements
An electric turbocharger comprising:
- a motor including a stator having a substantially cylindrical shape that extends in an axial direction and that forms a through hole to accommodate a rotary shaft;
- a compressor including an impeller that is rotatable via the motor;
- and
- a diffuser plate disposed between the motor and the compressor, and located adjacent to the stator in the axial direction, to receive heat from the stator,
- wherein the diffuser plate has an annular disk shape forming a shaft hole to accommodate the rotary shaft,
- wherein the diffuser plate includes:
- an overlapping region that overlaps the stator in the axial direction;
- a compressor-side disk facing the compressor;
- and
- a motor-side disk facing the motor,
- wherein a thermal conductivity of a material forming the motor-side disk is greater than a thermal conductivity of a material forming the compressor-side disk,
- wherein the diffuser plate has a cooling flow path to circulate a cooling medium, and
- wherein the cooling flow path includes:
- an inlet formed by a first through hole in the diffuser plate, wherein the first through hole is located radially outwardly relative to an outer circumferential wall of the stator;
- an outlet formed by a second through hole in the diffuser plate, wherein the second through hole is located radially outwardly relative to the outer circumferential wall of the stator;
- and
- an annular portion that at least partially surrounds the shafthole and that extends at least within the overlapping region of the diffuser plate, wherein the annular portion includes a first end connected to the inlet and a second end connected to the outlet.
14 more elements
An electric turbocharger comprising:
- a motor including a stator;
- a compressor including an impeller that is rotatable via the motor;
- and
- a diffuser plate disposed between the motor and the compressor, including a compressor-side disk facing the compressor and a motor-side disk disposed adjacent to the stator of the motor, to receive heat from the stator,
- wherein a thermal conductivity of a material forming the motor-side disk is greater than a thermal conductivity of a material forming the compressor-side disk, and
- wherein the diffuser plate forms a cooling flow path including:
- an annular portion extending substantially along a circular arc from a first end to a second end of the annular portion;
- a first connecting portion extending substantially radially outwardly from the first end of the annular portion to an inlet hole formed in the diffuser plate;
- and
- a second connection portion extending substantially radially outwardly from the second end of the annular portion to an outlet hole formed in the diffuser plate.
7 more elements
Dependencies are inferred from the claim text.