MOTOR STATOR

• US 20150311764A1
• Filed: 04/10/2013
• Published: 10/29/2015
• Est. Priority Date: 04/10/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: NAKAMURA, Masashi, OKAMOTO, Shogo, BESSHO, Tomohiro, SAKAMOTO, Katsuhiko
• Granted Patent: US 9,954,408 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02K 2203/09 Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles

Abstract

A connection member for supplying a stator winding with a current is constituted by covering a bus bar with a insulating resin. The bus bar is formed in an arc-like shape in the thickness direction of a belt-shaped conductor. Additionally, a weld zone formed on the bus bar has a projection portion projecting in the width direction, a first bent portion bent outside the arc from the projection portion in the thickness direction, and a second bent portion with the tip end thereof folded back in the width direction to allow the tip end of the second bent portion to be welded to a terminal on the stator winding.

Claims

1. A motor stator, comprising:

a stator core formed by laminating thin plates and having a plurality of salient poles projecting in a radial direction;

a stator winding wound around each salient pole of the stator core; and

a connection member connected to the stator winding to supply the stator winding with a current,

the motor stator being characterized in that;

the connection member is formed by covering a one or more than one bus bar with an insulating resin, each bus bar being a belt-shaped conductor formed in an arc-like shape in a thickness direction of the belt-shaped conductor and covered with the insulating resin at least in a portion opposing a coil end of the stator winding;

a weld zone is formed on the bus bar; and

the weld zone has a projection portion projecting in a width direction, a first bent portion bent outside the arc from the projection portion in a thickness direction, and a second bent portion with a tip end thereof folded back in the width direction to allow the tip end of the second bent portion to be welded to a terminal on the stator winding.

2. The motor stator according to claim 1, characterized in that:

the bus bar is covered with the insulating resin except for at least the second bent portion.

3. The motor stator according to claim 1, characterized in that:

the tip end of the second bent portion and the terminal on the stator winding are joined by TIG welding.

5. The motor stator according to claim 2, characterized in that:

the tip end of the second bent portion and the terminal on the stator winding are joined by TIG welding.

4. (canceled)