Rotor core of electric rotary machine

• US 4,400,639 A
• Filed: 11/26/1980
• Issued: 08/23/1983
• Est. Priority Date: 11/28/1979
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Mifune, Takao, Kobayashi, Junichi, Tanabe, Shoji
• Primary Examiner(s): Miller, J. D.
• Assistant Examiner(s): REBSCH, DONALD
• Application Number:
  US06/210,811
• Time in Patent Office: 1,000 Days
• Field of Search: 310/214, 310/215, 310/270, 310/50, 310/156, 310/217, 310/42, 310/43, 310/45, 310/261, 310/4, 310/5
• US Class Current: 310/215
• CPC Class Codes: H02K 3/345 between conductor and core, e.g. slot insulation
• CPC Class Codes: H02K 3/38 around winding heads, equalising connectors, or connections thereto
• CPC Class Codes: H02K 3/51 applicable to rotors only

Abstract

A rotor core of an electric rotary machine is provided with a number of slots opening toward the outer peripheral surface of the core and teeth formed between the slots. At the sides of the rotor core are mounted spidery end plates having notches opposing the slots and projections opposing the teeth. That end surface of the projection which is remote from the rotor core is formed to extend farther from the end surface of the rotor core as it becomes distant from the axis of the rotor core. The rotor winding is wound about the rotor core and spidery end plates to be buried in the slots and notches, the bottom of the notch being higher than the laminate slot, so that the slot liner is not distorted during winding operations.

Claims

1. A rotor of an electric rotary machine comprising:

a rotor core having a plurality of slots opening toward the outer peripheral surface of the rotor core and teeth formed between the slots;

a spidery end plate located at a side of said rotor core and having notches opposing said slots and projections opposing said teeth;

a rotor winding buried in said slots and said notches and tightly wound about said rotor core and said spidery end plate; and

slot cell insulators, formed individually and separate from said spidery end plate, provided between said rotor winding and said rotor core, the distance from the axis of said rotor core to a bottom of said notch being made slightly longer than that to a bottom of said slot, and each of said slot cell insulators being formed of an insulating sheet, an end of which is placed into said notch;

each of said projections of said spidery end plate having an end surface thereof which faces away from said rotor core when looking in the axial direction of said rotor core, said end surface being inclined progressively further away from the end surface of said rotor core as it becomes more distant from the axis of said rotor core at least along a portion thereof extending outward from the bottom of the notch in the radial direction of the rotor core.

2. A rotor according to claim 1, wherein a spidery end plate is provided on both ends of said rotor core.

3. A rotor according to claim 1, wherein said spidery end plate is formed of an insulating material.