H - Electricity – 01 – B
Patent
H - Electricity
01
B
H01B 1/02 (2006.01) H01B 13/00 (2006.01) H01C 7/00 (2006.01) H02K 3/00 (2006.01) H02K 17/18 (2006.01) H02K 17/20 (2006.01)
Patent
CA 2091126
An electroconductive material has at least one portion in which the electrical resistance varies continuously along a gradient. Accordingly, since the material is not formed by directly bonding different elements, it does not have a weak joint portion. Further, since other material characteristics basides electrical resistance also vary along a gradient, for instance, when the material is used at a high or low temperature, a large thermal stress does not generate at an interface between different elements of the material due to a difference of thermal expansion coefficients of such elements. A method of producing an electroconductive material comprises the steps of adding and additive to a base material, producing plural alloy materials having different compositions, respectively, overlapping the produced plural alloy materials, and joining the overlapped materials by plastic processing. A motor uses the above electroconductive material as a conductor provided in a plural slots. Consequently, starting characteristics of the motor are improved due to the skin effect, and internal stress of the motor due to the thermal expansion of the conductor is decreased. Moreover, the reliability of the motor is improved.
La présente invention vise un matériau électro-conducteur dont la résistance électrique d'au moins une partie est à variation continue. Le matériau n'est pas formé par liaison directe de différents éléments et ne comporte donc pas de parties plus faibles ou encore d'interfaces présentant d'importantes contraintes thermiques, lorsque le matériau est soumis à de hautes ou à de basses températures, attribuables à l'écart de coefficient de dilatation thermique d'éléments disparates. La méthode de production connexe consiste à ajouter un produit d'addition à un matériau de base, à produire ainsi un certain nombre de produits alliés de compositions diverses, à amalgamer ces produits puis à les relier en leur faisant subir un traitement plastique. Ce matériau électro-conducteur est utilisé dans les moteurs et il permet d'améliorer les caractéristiques de démarrage de ces derniers grâce à l'effet pelliculaire, d'en améliorer la fiabilité et de réduire les contraintes internes dû au phénomène de dilatation du conducteur.
Itoh Yoshiyasu
Kanai Hitoshi
Takahashi Masashi
Kabushiki Kaisha Toshiba
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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