US 12,316,171 B2
Inverter integrated motor
Takeshi Tokuyama, Tokyo (JP); Takaki Itaya, Hitachinaka (JP); Masahiro Hori, Tokyo (JP); and Takashi Hirao, Tokyo (JP)
Assigned to HITACHI ASTEMO, LTD., Hitachinaka (JP)
Appl. No. 17/922,850
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Jan. 29, 2021, PCT No. PCT/JP2021/003173
§ 371(c)(1), (2) Date Nov. 2, 2022,
PCT Pub. No. WO2021/235009, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 2020-087753 (JP), filed on May 19, 2020.
Prior Publication US 2023/0155456 A1, May 18, 2023
Int. Cl. H02K 11/33 (2016.01); H02K 3/50 (2006.01); H02K 5/20 (2006.01); H02K 9/19 (2006.01); H02K 11/27 (2016.01)
CPC H02K 11/33 (2016.01) [H02K 3/50 (2013.01); H02K 5/203 (2021.01); H02K 9/19 (2013.01); H02K 11/27 (2016.01); H02K 2203/09 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An inverter integrated motor comprising:
a power module that converts a direct current into an alternating current;
a flow path forming body surrounding the power module and configured to allow a refrigerant to flow through the power module and surround a plurality of sides of the power module;
an inverter comprising an enclosure that houses the power module and the flow path forming body, wherein the power module and the flow path forming body are installed as parts of the inverter;
a current sensor that detects the alternating current and is installed on the enclosure via the flow path forming body;
a motor including a stator and a rotor configured to rotate inside the stator, wherein the motor receives power supplied from a coil formed around the stator;
a motor housing that houses the stator and the rotor and comprising (i) a housing part to house and surround at least a part of the current sensor when the inverter is coupled to the motor, and (ii) a motor flow path positioned adjacent to a side of the housing part, extending in an axial direction, and configured to allow the refrigerant to flow to the flow path forming body; and
a plurality of AC bus bars extending in a direction towards the motor,
wherein
the enclosure comprises a protruded portion housing the current sensor, the protruded portion configured to fit into the housing part,
the plurality of AC bus bars extend from the protruded portion of the enclosure to couple with a plurality of cables of the motor exposed via the housing part,
the power module is disposed at a position facing a rotation shaft of the motor via the stator and the rotor,
the current sensor is interposed between the flow path forming body and a coil end of the coil formed around the stator when viewed from a direction perpendicular to the rotation shaft,
the motor flow path and the flow path forming body form a continuous flow path, and
the motor causes the refrigerant to flow between the motor and the inverter via the continuous flow path.