MANUFACTURE OF STATOR COIL

PURPOSE:To improve the insulation and manufacturability by apply the non- solvent type varnish only to the part to be the coil side when the original coil is shaped into the hexagonal coil having a pair of linear coil sides. CONSTITUTION:An original coil 15 is formed by winding the insulated wire 14...

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Bibliographic Details
Main Author INNAN TOSHIO
Format Patent
LanguageEnglish
Published 09.06.1987
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:PURPOSE:To improve the insulation and manufacturability by apply the non- solvent type varnish only to the part to be the coil side when the original coil is shaped into the hexagonal coil having a pair of linear coil sides. CONSTITUTION:An original coil 15 is formed by winding the insulated wire 14 to shape portions 15a and 15a in the form of straight lines which are to be coil sides 16a and 16a of the hexagonal coil. Then, non-solvent type varnish 17 is applied to the linear portions 15a and 15a. After that, heating press dies 18 and 18 are put on the portions the varnish is applied and the varnish 17 is heated and hardened. Subsequently, except the portion hardened by applying the varnish, the portions 16b and 16b are formed by bending to shape up into a hexagonal coil 16. Thus the varnish-hardened layer is prevented from generating voids and at the same time in shaping up into the coil the insulating coat of the insulated wire from damage, so that the insulation can be improved. Further, as it shortens the time to harden the varnish, the manufacturability can also be improved.
Bibliography:Application Number: JP19850264926