Motor rotor and spindle, crankshaft, turbine rotor, gyro rotor and escapement rotating parts in the manufacturing process, need to go through in order to smooth the normal operation of balance.

电机转子、机床主轴、内燃机曲轴、汽轮机转子、陀螺转子和钟表摆轮等旋转零部件在制造过程中，都需要经过平衡才能平稳正常地运转。

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This method regulates speed by changing the number of steps of the additional resistor in the rotor circuit, so it's hard to realize smooth speed-regulation, also its performance is poor.

该方法是通过调节转子回路附加电阻的有级调速，难以实现平滑地调速，而且调节性能差，调速过程中大量的转差功率通过转子回路电阻转化为热能消耗掉了。

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The paper shows the research of the multi-layer theory of smooth solid rotor induction machines.

本文在延拓法基础上对光滑实心转子异步电机电磁场进行了三维直角坐标系多层理论研究。

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