CN-122029728-A - Motor and electric compressor provided with same

Abstract

The invention provides a motor which can eliminate insulating paper inserted into each slot by manual operation and can realize improvement of insulativity. The motor is provided with a stator (21) around which coils (23) are wound, and a bus bar unit (26) which is attached to the stator (21) and is formed by molding a bus bar formed by molding a resin, wherein the bus bar electrically connects the coils (23) led out from each slot (29) of the stator (21) to three-phase terminals, an inter-phase insulation part (30) which enters the slot (29) to insulate adjacent coils (23) from each other is integrally formed in the bus bar unit (26), and a groove (61) into which the inter-phase insulation part (30) is fitted is formed in the stator (21).

Inventors

• MUTOH YUSUKE

Assignees

• 三电株式会社

Dates

Publication Date

20260512

Application Date

20240913

Priority Date

20231023

Claims (8)

1. 1. A motor is characterized in that, Comprises a stator around which a coil is wound, and a bus bar unit mounted on the stator and formed by molding a bus bar with resin, wherein the bus bar electrically connects the coil led out from each slot of the stator with a three-phase terminal, An inter-phase insulation part which enters the slot to insulate the adjacent coils is integrally formed on the bus bar unit, The stator is formed with a groove into which the interphase insulating portion fits.
2. 2. The motor according to claim 1, wherein, The stator includes a core, insulators provided at both axial ends of the core, and a fixing cover attached to one of the insulators, the coil is wound around the core via each of the insulators, and The bus bar unit is mounted to the stator on the other insulator side, The groove is formed in the fixed cover.
3. 3. The motor according to claim 2, wherein, The fixing cover has an engaging portion engaged with an engaged portion formed on one of the insulators, and is detachably attached to the insulator.
4. 4. The motor according to claim 2, wherein, The bus bar unit has an engagement portion to be engaged with an engaged portion formed on the other insulating material, and is detachably attached to the insulating material.
5. 5. The motor according to claim 1, wherein, The stator includes a core, insulators provided at both axial ends of the core, the coils being wound around the core via the insulators, and The grooves are formed in each of the insulating members, respectively.
6. 6. The motor according to claim 5, wherein, The bus bar unit has an engagement portion engaged with an engaged portion formed in the insulating material, and is detachably attached to the insulating material.
7. 7. An electric compressor, which is characterized in that, The motor and the compression element according to any one of claims 1 to 6 are housed in a container, and an inverter connected to the three-phase terminal is provided.
8. 8. The motor-driven compressor according to claim 7, wherein, The stator includes a core, insulators provided at both axial ends of the core, the coils being wound around the core via the insulators, and The inverter is arranged in an inverter accommodating part, the inverter accommodating part is formed in the container in the axial direction of the iron core, The bus bar unit is mounted to the stator on the inverter side, and the three-phase terminals are electrically connected to the inverter.

Description

Motor and electric compressor provided with same Technical Field The present invention relates to a motor having a bus bar unit formed by resin molding a bus bar that electrically connects coils led out from respective slots of a stator and three-phase terminals, and an electric compressor provided with the motor. Background Conventionally, a motor for driving a compression element of an electric compressor is configured by a stator and a rotor rotating inside the stator. The stator is composed of an iron core formed by laminating electromagnetic steel plates, a plurality of teeth protruding from the iron core in the inner radial direction, and coils wound around the teeth, but since the iron core and the coils need to be insulated, an insulating material composed of insulating resin is provided at the end of the iron core, an iron core unit is composed of the insulating material and the iron core, and the coils are wound around the insulating material, thereby realizing insulation between the end of the iron core and the coils. A bus bar unit formed by resin molding a metal bus bar and three-phase terminals (terminals connected to an inverter) is provided at an end portion of the stator, and a coil led out from each slot of the stator is electrically connected to the three-phase terminals by a bus bar of the bus bar unit (for example, refer to patent document 1). Further, since adjacent coils in the slots also need to be insulated from each other, conventionally, insulating paper has been interposed between the coils in the slots by manual operation (for example, refer to patent document 2). WO2020/013078 Patent document 2 Japanese patent application laid-open No. 2008-43020 In patent document 2, a plurality of insulating papers are integrated (annular plate body) to achieve efficiency of operation, but there is a risk that the insulating papers move or deform to contact the coil due to external load such as vibration, and therefore, there is a problem that molding with resin is necessary, and further improvement is required. Disclosure of Invention The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a motor capable of eliminating insulation paper inserted into each slot by manual operation and improving insulation properties, and an electric compressor including the motor. In order to solve the above problems, the motor of the present invention is characterized by comprising a stator around which coils are wound, and a bus bar unit mounted to the stator and formed by molding a bus bar with a resin, wherein the bus bar electrically connects the coils led out from each slot of the stator to three-phase terminals, the bus bar unit is integrally formed with an inter-phase insulation portion which enters the slots to insulate adjacent coils from each other, and the stator is formed with a groove into which the inter-phase insulation portion is fitted. The motor according to the invention of claim 2 is characterized in that the stator includes a core, insulators provided at both axial ends of the core, and a stator cover attached to one of the insulators, the coil is wound around the core via the insulators, the bus bar unit is attached to the stator on the other insulator side, and the slot is formed in the stator cover. In the motor according to the aspect 3 of the present invention, the fixed cover has an engaging portion that engages with an engaged portion formed in one of the insulators, and is detachably attached to the insulator. The motor according to claim 4 is the motor according to claim 2, wherein the bus bar unit has an engaging portion that engages with an engaged portion formed in the other insulator, and is detachably attached to the insulator. The motor according to claim 5 is the motor according to claim 1, wherein the stator includes an iron core and insulators provided at both axial ends of the iron core, the coil is wound around the iron core via the insulators, and the slots are formed in the insulators. In the motor according to the invention of claim 6, the bus bar unit has an engagement portion that engages with an engaged portion formed in the insulator, and is detachably attached to the insulator. The electric compressor according to claim 7 is characterized in that the motor and the compression element of each of the above inventions are housed in a container, and an inverter connected to three-phase terminals is provided. In the electric compressor according to the aspect 8 of the present invention, the stator includes an iron core, and insulators provided at both axial ends of the iron core, the coil is wound around the iron core via the insulators, the inverter is provided in an inverter housing portion formed in the container in the axial direction of the iron core, the busbar unit is mounted to the stator on the inverter side, and the three-phase terminal is electrically connected to the in