Stator of a vehicular alternating current generator and its manufacturing method

• US 5,576,584 A
• Filed: 07/12/1994
• Issued: 11/19/1996
• Est. Priority Date: 03/16/1994
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Katayama, Hiroki, Adachi, Katsumi, Kusumoto, Katsuhiko
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): JONES, JUDSON
• Application Number:
  US08/273,707
• Time in Patent Office: 861 Days
• Field of Search: 310/43, 310/51, 310/45, 310/179, 310/194, 336/205, 336/206, 336/219
• US Class Current: 310/45
• CPC Class Codes: H02K 3/48 in slots
• CPC Class Codes: H02K 5/24 specially adapted for suppression or reduction of noise or vibrations

Abstract

A stator of a vehicular alternating current generator comprising: a stator core having slots; and a stator coil wound in the slots of the stator core; wherein a resin having a peak or peaks of a loss tangent which is a value of a loss elastic modulus divided by a storage elastic modulus in a temperature range of from 100° C. to 250° C. is provided among coil strands of the stator coil and/or between the stator core and the stator coil.

Claims

1. A stator of a vehicular alternating current generator comprising:

a stator core having slots;

a stator coil wound in the slots of the stator core; and

a resin having a peak or peaks of a loss tangent, which is a value of a loss elastic modulus divided by a storage elastic modulus in a temperature range of from 100°

C. to 250°

C. disposed among coil strands of the stator coil and/or between the stator core and the stator coil.

2. The stator of a vehicular alternating current generator according to claim 1, wherein the peak or peaks of the loss tangent of the resin are not smaller than 0.6.

3. The stator of a vehicular alternating current generator according to claim 1, wherein the loss tangent of the resin is not smaller than 0.1 in a temperature range of from 20°

C. to 250°

C.

4. A method of manufacturing a stator of a vehicular alternating current generator comprising the steps of:

previously coating a resin having a peak or peaks of a loss tangent in a temperature range of from 100°

C. to 250°

C. onto coil strands of a stator coil of a stator comprising a stator core having slots and the stator coil; and

winding the coil strands of the stator coil in the slots of the stator core.

5. A method of manufacturing a stator of a vehicular alternating current generator wherein the stator is comprising a stator core having slots and a stator coil, said method comprising the steps of:

winding coil strands of the stator coil in the slots of the stator core; and

impregnating a resin having a peak or peaks of a loss tangent in a temperature range of from 100°

C. to 250°

C. among the coil strands of the stator coil and/or between the stator core and the stator coil.