ELECTRIC MACHINE

• US 20120217829A1
• Filed: 09/17/2010
• Published: 08/30/2012
• Est. Priority Date: 09/17/2009
• Status: Active Grant

• Current Assignee: Seg Automotive Germany GMBH
• Original Assignee: Robert Bosch GmbH
• Inventors: Sekertzis, Vassilios, Nario-Rivera, Gianna
• Granted Patent: US 9,184,643 B2
• Time in Patent Office: Days
• US Class Current: 310/71
• CPC Class Codes: H02K 11/05 Rectifiers associated with casings, enclosures or brackets
• CPC Class Codes: H02K 19/365 with a voltage regulator

Abstract

Electric machine (10), in particular an alternating current generator, comprising a rotor (20) having a rotational axis (26), a stator (16) made of a stator iron (17) and a stator winding (18) inserted therein, said winding having conductor ends (228), which are interconnected with a rectifier device (139), a controller (231) for controlling an excitation current, and a cooling device in the rectifier device (139), comprising a first cooling body (53), which has at least one receptacle (66) on which a current rectifier (147) is received, and a second cooling body (117), wherein the cooling body (117) has at least one receptacle (120) on which a current rectifier (150) is received, an interconnection unit (144), which interconnects the current rectifiers (147, 150) into a bridge circuit, wherein the interconnection unit (144) comprises a plurality of integral guide sockets (225) in which conductor ends (228) of the stator winding (18) are received, wherein a guide socket (225) is disposed between the end shield (13.2) and the controller (231) in the direction of the rotational axis (26).

Claims

1. An electric machine (10) having a rotor (20), which has an axis of rotation (26), a stator (16) including a stator iron (17) and a stator winding (18) inserted therein, which winding has conductor ends (228), which are interconnected with a rectifier device (139), a regulator (231) for regulating an excitation current, and a cooling device in the rectifier device (139), said cooling device having a first heat sink (53), which has at least one receptacle (66), on which a current rectifier (147) is received, having a second heat sink (117), wherein the second heat sink (117) has at least one receptacle (120), on which a current rectifier (150) is received, and having an interconnection unit (144), which interconnects the current rectifiers (147, 150) to form a bridge circuit, wherein the interconnection unit (144) has a plurality of integrally formed guide stubs (225), in which conductor ends (228) of the stator winding (18) are received, characterized in that an arm (234) of the interconnection unit (144) connects one guide stub (225) integrally to another, shorter guide stub (225), wherein the shorter guide stub (225) and the arm (234) are disposed between an end shield (13.2) and the regulator (231) in the direction of the axis of rotation (26).

3. The electric machine as claimed in claim 1, characterized in that the arm (234) reaches around a fixing stub (328) radially from the inside.

4. The electric machine as claimed in claim 3, characterized in that the regulator (231) is held by the fixing stub (328).

5. The electric machine as claimed in claim 1, characterized in that a conductor in the form of a circumferential arc (198), which is disposed partially under an outer edge of at least one receptacle (66) in a direction of the axis of rotation (26), starts from a terminal contact (195) directly associated with the shorter guide stub (225).

6. The electric machine as claimed in claim 5, characterized in that the circumferential arc (198) is disposed between the end shield (13.2) and the first heat sink (53).

7. The electric machine as claimed in claim 5, characterized in that the circumferential arc (198) has a plurality of bending points (222), wherein some of the bending points (222) are disposed at a same circumferential position as terminal contacts (201, 207, 213).

8. The electric machine as claimed in claim 5, characterized in that the circumferential arc (198) extends over an angle with respect to the axis of rotation (26) which is greater than a total angle over which the current rectifiers (147) and (150) extend in the heat sinks (53) and (117).

9. The electric machine as claimed in claim 5, characterized in that the circumferential arc (198) is supported on the guide stubs (225) by means of integrally formed lugs (223).

10. The electric machine as claimed in claim 1, characterized in that the stator winding (18) disposed in the stator (16) or stator iron (17) has conductor ends (228) which are of different lengths.

11. The electric machine as claimed in claim 10, characterized in that the conductor ends (228) are matched to the guide stubs (225) of different sizes.

12. The electric machine as claimed in claim 1, characterized in that the machine is an alternating current generator.

2. (canceled)