Stator winding method and apparatus

H - Electricity – 02 – K

Patent

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H02K 15/085 (2006.01)

Patent

CA 2193461

A multiple phase, multiple pole stator is wound using two coil winding passes per phase. The stator core is indexed in alternate directions between the winding of individual coils of one phase to the next. As a result, the coils of a particular phase are wound using a first stator index direction for the first winding pass and a second stator index direction for the second winding pass. A winding apparatus for such winding has a mandrel assembly which includes a tubular shaft having an expandable mandrel at the forward end thereof which is received in the bore of a stator. The mandrel includes a fixed, radially- extending key and at least one pivotal, radially-extending key. The keys are received in slots or keyways provided in the stator bore to lock the stator to the shaft and to rotatably drive the stator during the winding process. An improved combined winding form and lead guide mechanism assembly is also provided wherein a lead guide sliding assembly is located in a cavity in the winding form.

e stator polyphasé et multipolaire s'enroule selon deux tours de bobinage par phase. Le noyau du stator est indexé en direction alternée entre l'enroulement des bobines d'une phase à l'autre. Il en résulte que les bobines d'une phase donnée sont enroulées selon une première direction d'index du stator pour le premier tour d'enroulement et selon une deuxième direction d'index du stator pour le deuxième tour d'enroulement. L'appareillage de bobinage nécessaire pour effectuer cet enroulement comporte un mandrin muni d'un arbre tubulaire à l'extrémité antérieure duquel se trouve un mandrin qui entre dans l'alésage du stator. Ce mandrin comprend une clavette fixe, qui s'étend radialement, et au moins une autre, pivotante, qui se déploie, elle aussi, radialement. Ces clavettes entrent dans des fentes ou des rainures de clavette qui se trouvent dans l'alésage du stator pour asservir le stator à l'arbre et pour entraîner le stator dans un mouvement giratoire pendant le processus de bobinage. Un gabarit de bobinage combiné et un mécanisme de guidage améliorés sont également fournis, une glissière de guidage étant placée dans la cavité du gabarit de bobinage.

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