The paper mainly put forward a new control method of stepping motor which character-, ized by equal-stepped fine division, and then design a constant frequency PWM driver circuit.

提出一种等步距角的细分控制方法，并据此设计了恒频脉宽调制细分电路。

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The stator of motor adopts centralized winding and its rotor applies permanent magnet material. The constant speed can be achieved at a certain frequency of power supply.

该系列电机的定子采用集中式绕组，转子采用永磁材料加工，电机可根据电源的频率要求，输出恒定的转速。

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Turbulent characteristics of different frequency band in constant volume combustion bomb can be realized by changing the structure of the perforated plate and the velocity of driving motor.

利用孔板平动法生成湍流，通过调节平板孔径的大小和驱动电机的转速来达到在定容燃烧弹内生成不同频段湍流特性的目的。

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