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    • 4. 发明授权
    • Electroconductive article, having portions with variable resistance and
a rotor produced therefrom
    • 导电制品,具有可变电阻的部分和由其制成的转子
    • US5616978A
    • 1997-04-01
    • US26043
    • 1993-03-05
    • Hitoshi KanaiMasashi TakahashiYoshiyasu Itoh
    • Hitoshi KanaiMasashi TakahashiYoshiyasu Itoh
    • B22F3/24C22C1/04H01C7/00H02K3/02H02K17/16H02K17/18H02K17/20
    • H02K17/205H01C7/00H02K17/185
    • 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 besides 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 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.
    • 导电材料具有至少一部分,其中电阻沿梯度连续变化。 因此,由于不是通过直接接合不同的元件来形成材料,所以不具有弱接合部分。 此外,由于除了电阻之外的其它材料特性也沿梯度变化,例如,当材料在高温或低温下使用时,由于差异,材料的不同元件之间的界面处不会产生大的热应力 的这种元件的热膨胀系数。 电动机使用上述导电材料作为设置在多个槽中的导体。 因此,由于皮肤效应,马达的启动特性得到改善,并且由于导体的热膨胀导致的马达的内部应力降低。 此外,马达的可靠性得到提高。