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Rotor of a dynamoelectric machine

  • US 10,056,727 B2
  • Filed: 10/02/2015
  • Issued: 08/21/2018
  • Est. Priority Date: 04/04/2013
  • Status: Active Grant
First Claim
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1. A rotor (4) of a dynamoelectric machine comprising a shaft (5), a cylindrical armature (6), an armature winding (7) and a drum commutator (8), which comprises an insulating support member (9) and conductor segments (10), which are attached thereto and anchored in the support member (9) by means of armature portions (17), and to which the winding wires (11) are attached in electrically conducting relationship, wherein:

  • the winding wires (11) consist of aluminum;

    the conductor segments (10) respectively have a running-surface region (18) consisting of copper and a terminal region (21) consisting of aluminum or a metal that can be welded to aluminum (aluminum-compatible metal);

    the armature portions (17) consist completely of copper and are respectively part of a uniform copper structure (19) that also comprises the respective associated running-surface region (18);

    the terminal region (21) comprises respectively a massive terminal lug (20), which projects radially relative to the brush running surface;

    the conductor segments (10) are stamped out of a strand-like two-component profile (60), which was formed by durably joining a copper sub-profile (61) and an aluminum sub-profile (62);

    the winding wires (11) are welded at the end to the terminal lug (20) of the respectively associated conductor segment (10), without being in direct contact with the running-surface regions (18); and

    the terminal lugs (20) each respectively have a recess for receiving the end of at least one winding wire (11).

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