Rotor

• US 5,177,390 A
• Filed: 09/17/1991
• Issued: 01/05/1993
• Est. Priority Date: 09/17/1991
• Status: Expired due to Term

• Current Assignee: Kohler Company
• Original Assignee: Kohler Company
• Inventors: Van Maaren, Richard D.
• Primary Examiner(s): SKUDY, ROBERT
• Application Number:
  US07/761,107
• Time in Patent Office: 476 Days
• Field of Search: 310/269, 310/183, 310/197, 310/261, 310/42, 310/62, 310/91, 310/63, 310/182, 310/211, 29/598
• US Class Current: 310/183
• CPC Class Codes: H02K 3/20 for auxiliary purposes, e.g. damping or commutating
• CPC Class Codes: H02K 3/527 applicable to rotors only

Abstract

A rotor for use in a generator or a motor wherein damper bars extend through rotor laminations and at least one of the damper bars extends from the laminations to provide support for a coil portion. In a preferred manner the damper bar extends from opposing ends of the laminations.

Claims

1. A rotor for use in dynamoelectric machine comprising:

rotor laminations including a would coil portion;

a rotor shaft connected to said rotor laminations; and

damper bars extending through said rotor laminations, at least one of said damper bars composed of a high electrically conductive material and having free ends extending from said laminations to provide support for said coil portion.

2. The rotor of claim 1 wherein said one of said damper bars extending from said laminations is of a geometric configuration different from said damper bars extending through said rotor laminations.

3. The rotor of claim 1 wherein said one of said damper bars extending from said laminations extends from opposing ends of said lamination.

4. The rotor of claim 1 wherein said one of said damper bars extending from said laminations is noncircular.

5. The rotor of claim 1 wherein said one of said damper bars extending from said laminations has a longitudinal axis and a shorter transverse axis and when viewed in cross section along said transverse axis has parallel sides and rounded end portions.

6. The rotor of claim 4 wherein said one of said damper bars extending from said laminations is composed of an aluminum material.

7. The rotor of claim 4 wherein said one of said damper bars extending from said laminations is composed of a copper material.