Salient pole rotor with shielding rods between adjacent poles

• US 4,274,027 A
• Filed: 09/20/1979
• Issued: 06/16/1981
• Est. Priority Date: 09/20/1978
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Watanabe, Masatoshi, Sato, Koji, Yasaka, Yasuhiro, Wachi, Yasuyuki, Hirama, Yukio, Iwasaki, Tsutomu, Higuchi, Shigeo
• Primary Examiner(s): Budd, Mark O.
• Application Number:
  US06/077,734
• Time in Patent Office: 635 Days
• Field of Search: 310/261, 310/262, 310/269, 310/214, 310/218, 310/43, 310/45
• US Class Current: 310/269
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: Y10S 174/21 Rotor

Abstract

A rotor for electric rotating machines has a plurality of salient poles arranged in spaced relation in axial direction on the outer periphery of the rotor rim. Adjacent salient poles have opposed slots in the axial direction, into which a shielding member is fitted to bridge between said adjacent poles. The shielding member includes a plurality of rod members fitted over the entire length of said slots to extend across said opposed slots. While the rotor is running, the centrifugal force acts on each of said rod members thereby pressing the rod members against the outer periphery side wall of the slot. As a result, the centrifugal force is dispersed substantially uniformly over the entire length of the slot wall.

Claims

1. A rotor for electric rotating machine comprising;

a rotor rim, a plurality of salient poles mounted around said rotor rim, each of said salient poles including a field core secured to said rotor rim and a field coil wound around the core, and a plurality of shielding rod assemblies mounted between every adjacent two of said field cores so as to provide said rotor with a substantially cylindrical configuration each of said rod assemblies comprising a plurality of rod members extending transversely and closely side by side between the associated adjacent two field cores and fixed at their respective opposing ends into slots formed in respective opposing sides of said adjacent two field cores.

2. A rotor with salient poles according to claim 1, in which said rod members have a circular section.

3. A rotor with salient poles according to claim 2, in which said rod members are hollow.

4. A rotor with salient poles according to claim 1, in which said rod members are hollow.

5. A rotor with salient poles according to claim 1, in which each of said rod members is in contact with the outer periphery side wall of each of said slots at one point.

6. A rotor for electric rotating machine comprising;

a rotor rim, a plurality of salient poles mounted around said rotor rim, each of said salient poles including a field core secured to said rotor rim and a field coil wound around the core, and a plurality of shielding rod assemblies mounted between every adjacent two of said field cores so as to provide said rotor with a substantially cylindrical configuration each of said rod assembles comprising a plurality of rod members extending transversely and closely side by side between the associated adjacent two field cores, and fixed at their respective opposing ends into slots formed in opposed sides of said adjacent two field cores by bonding agents filled in said slots.

7. A rotor with salient poles according to claim 6, in which each of said rod members is in contact with the outer periphery side wall of each of said slots.

8. A rotor with salient poles according to claim 6, in which at least that part of said bonding agent which is located between each of said rod members and said slot wall is reinforced by fiber.

9. A rotor for electric rotating machine comprising;

a rotor rim, a plurality of salient poles mounted around said rotor rim, each of said salient poles including a field core secured to said rotor rim and a field coil wound around the core, and a plurality of shielding rod assemblies mounted between every adjacent two of said field cores so as to provide said rotor with a substantially cylindrical configuration each of said rod assemblies comprising a plurality of rod members extending transversely and closely side by side between the associated adjacent two field cores and fixed at their respective opposing ends to respective common connecting members which are securely fitted into slots formed in opposed sides of said adjacent two field cores.

10. A rotor with salient poles for electric rotating machines according to claim 9, in which said connecting member is made of plastics reinforced by fiber.

11. A rotor with salient poles according to claim 9, in which said plurality of rod members are divided into a plurality of blocks, the respective ends of the rod members within each block being connected by a connecting member.

12. A rotor for electric rotating machine comprising;

a rotor rim, a plurality of salient poles mounted around said rotor rim, each of said salient poles including a field core secured to said rotor rim and a field coil wound around the core, and a plurality of shielding rod assemblies mounted between every adjacent two of said field cores so as to provide said rotor with a substantially cylindrical configuration each of said rod assemblies comprising a plurality of rod members extending transversely and closely side by side between the associated adjacent two field cores and each having adjusting members fixed to both opposing ends thereof and fitted into slots formed in opposing sides of said adjacent two field cores, respectively.

13. A rotor with salient poles according to claim 12, in which a longitudinal hole is formed in each end of said rod member, and part of one of said adjusting members is inserted into each of said holes respectively.

14. A rotor for electric rotating machine comprising;

a rotor rim, a plurality of salient poles mounted around said rotor rim, each of said salient poles including a field core secured to said rotor rim and a field coil wound around the core, an plurality of shielding rod assemblies fixedly mounted between every adjacent two of said field cores so as to provide said rotor with a substantially cylindrical configuration, each of said rod assemblies comprising a plurality of hollow rod members extending transversely and closely side by side between the associated adjacent two field cores, and means for fixing the respective opposing ends of said hollow rod members into slots formed in respective opposing sides of said adjacent two field cores.