Title:
METHOD FOR JUDGING VARNISH IMPREGNATION STATE
Document Type and Number:
WIPO Patent Application WO/2007/111041
Kind Code:
A1
Abstract:
A method for judging the varnish impregnation state of a core assembly (1) obtained by disposing an insulation paper (31) and a coil (4) in a slot (21) of a motor core (2) and impregnating the coil (4) and the slot (21) with a varnish (5) by nondestructive inspection. An AC voltage (E) is applied between the motor core (2) and the coil (4) for the core assembly (1) and the dielectric loss tangent tanδ of the core assembly (1) is determined. If the value of tanδ is not larger than a predetermined reference value of acceptable product, a decision is made that the varnish impregnation state of the core assembly (1) is normal.
Inventors:
KIMURA HIDEAKI (JP)
HASHIMOTO SHINGO (JP)
HASHIMOTO SHINGO (JP)
Application Number:
PCT/JP2007/051757
Publication Date:
October 04, 2007
Filing Date:
February 02, 2007
Export Citation:
Assignee:
AISIN AW CO (JP)
KIMURA HIDEAKI (JP)
HASHIMOTO SHINGO (JP)
KIMURA HIDEAKI (JP)
HASHIMOTO SHINGO (JP)
International Classes:
G01N27/22; H01F41/12; H02K15/12
Foreign References:
| JPS5712512A | 1982-01-22 | |||
| JPH04375B2 | 1992-01-07 | |||
| JP3167479B2 | 2001-05-21 |
Other References:
OHASHI N. ET AL.: "Sogoteki na Zetsuen Kaifuku Shuho no Kenkyu", ROLLING STOCK & MACHINERY, vol. 12, no. 11, 2004, pages 17 - 21, XP003018232
ZHENGYAN G. ET AL.: "A NEW APPROACH TO COMPATBILITY OF MAGNET WIRE AND VARNISH USING DIELECTROMETRY", CONFERENCE RECORD OF THE 1985 INTERNATIONAL CONFERENCE ON PROPERTIES AND APPLICATIONS OF DIELECTRIC MATERIALS, vol. 2, 1985, pages 447 - 450, XP003018233
ZHENGYAN G. ET AL.: "A NEW APPROACH TO COMPATBILITY OF MAGNET WIRE AND VARNISH USING DIELECTROMETRY", CONFERENCE RECORD OF THE 1985 INTERNATIONAL CONFERENCE ON PROPERTIES AND APPLICATIONS OF DIELECTRIC MATERIALS, vol. 2, 1985, pages 447 - 450, XP003018233
Attorney, Agent or Firm:
TAKAHASHI, Yoshiyasu et al. (26-19 Meieki 3-chome, Nakamura-ku, Nagoya-sh, Aichi 02, JP)
Download PDF: