Rotary electric machine and method of manufacturing rotary electric machine
In a rotary electric machine, wound wires are connected to a first terminal and a second terminal. Circuit terminals that are configured from a conductive metal other than aluminum, and the first terminal and the second terminal that are configured from a metal with a principal component of aluminum are joined together inside a circuit chamber that has high water resistant properties. Corrosion is accordingly suppressed at join sites of the circuit terminals with the first terminal and the second terminal. There is therefore no need to coat the join sites with for example a sealing material in order to suppress corrosion at the join sites. Good electrical continuity is accordingly enabled between the circuit terminals and the wound wires while suppressing an increase in costs, even when the wound wire is configured from a metal with a principal component of aluminum.
1. A rotary electric machine, comprising:
a cover that configures an outline of a sealed circuit chamber;
a drive circuit section that is housed inside the circuit chamber and that drives a motor section;
a circuit terminal that is provided at the drive circuit section such that the circuit terminal is housed inside the circuit chamber, and that is configured from a conductive metal other than aluminum; and
wound wires that are wound around tooth portions of an armature core in the motor section, the wound wires being configured from a metal whose principal component is aluminum, and having terminal portions that are joined to the circuit terminal via a coupling member such that a joined portion at which the coupling member and the circuit terminal are joined is arranged inside the circuit chamber, the coupling member being configured from a metal whose principal component is aluminum, wherein:
the circuit chamber is disposed adjacent to the motor section as viewed along an axial direction of the motor section,
the coupling member includes a plurality of join portions which are respectively joined to the terminal portions of the wound wires,
a bottomed recessed portion having a wall portion is formed at an outer side of a frame portion of the cover, such that the recessed portion is open toward one side in the axial direction of the motor section, and
hole portions are respectively formed at a wall portion of the frame portion and the wall portion of the recessed portion, such that the terminal portions of the wound wires are joined to the circuit terminal via the coupling member in a state in which the coupling member is inserted in the respective hole portions.
2. The rotary electric machine of claim 1 , wherein the terminal portions of the wound wires, which are in a bundled state, are joined to each of the join portions.
3. The rotary electric machine of claim 1 , wherein the coupling member is formed integrally with the cover.
4. The rotary electric machine of claim 1 , wherein the circuit terminal is configured from a metal whose principal component is copper, and the joined portion of the circuit terminal with the coupling member is plated with tin.
5. The rotary electric machine of claim 1 , wherein the circuit terminal is provided at a circuit board which is housed inside the circuit chamber and which configures the drive circuit section.
6. The rotary electric machine of claim 1 , wherein the coupling member extends from outside of the circuit chamber and the recessed portion to inside of the circuit chamber, and the terminal portions are joined to the coupling member at the outside of the circuit chamber and the recessed portion.