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发明授权
CN1816956B 电动机 失效 - 权利终止

电动机
摘要：
本发明提供一种电动机，将第1非磁性层(4)的接近转子表面的部分的靠近极中心的端部与极间构成的夹角设为θ1，并且，将第2非磁性层(5)的接近转子表面的部分的靠近极中心的端部与极间的夹角设为θ2，在将极对数取为Pn时，则使：0＜θ1＜180/(5·Pn)，并且：180/(5·Pn)≤θ2≤180×2/(5·Pn)，或使：0＜θ1＜180/(7·Pn)，并且：180/(7·Pn)≤θ2≤180×2/(7·Pn)。从而，既可确保充分的磁通，又能降低磁通密度分布波形(感应电压波形)的特定因次，例如5次和7次谐波，并且，不会产生不必要的径向力或轴向力。
摘要（英）：

An angle theta1 formed by the end, closer to the pole center, of the portion of a first non-magnetic layer (4) which is in the vicinity of a rotor surface and an interpole, and an angle theta2 formed by the end, closer to the pole center, of the portion of a second non-magnetic layer (5) which is in thevicinity of a rotor surface and an interpole satisfy the following expressions, when polar logarithm is Pn. 0 < theta1 < 180/(5.Pn) and 180/(5.Pn)<= theta2 <= 180 x 2/(5.Pn), or 0 < theta1 < 180 /(7.Pn) and 180/(7.Pn) <= theta2 <= 180 x 2/(7.Pn) Accordingly, the specific degree, fifth-degree orseventh-degree for example, of a magnetic flux density distribution waveform (induction voltage waveform) is reduced while ensuring a sufficient magnetic flux, and unnecessary radial force or thrust force is not produced.

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