We believe compressed electret micromotor is better microactuators in the future . it can be applied in various fields such as aviation , spaceflight , military and medicine and so on 扁平驻极体微电机是未来微型执行器的较好选择，可应用于航空航天、军事、医学和其他领域。
Jiangnan acoustic factory was established in 1988 . it is a joint stock company which develops produce and manages buzzer ( magnet buzzer & piezo buzzer ) , mylar speaker and transducer etc 武进市江南讯响器厂成立于1988年,是一家专业开发.生产.销售蜂鸣器(电磁式&压电式) ,薄型喇叭和驻极体传声器等股份制企业
We put forward the compressed electret micromotor model by improving the structure of classical electret motor . compared with classical electret motor , compressed electret micromotor has some particular superiorities 通过对经典驻极体电动机进行结构改造，提出了扁平驻极体微电机的模型，它具有经典驻极体微电机无法比拟的优点。
The operating principle of the compressed electret micromotor is the variable capacitance . the attenuation time constant of the charges on rotor surface is much longer than the shaping time of electret itself while the rotor is made of electret 扁平驻极体微电机的工作原理是电容可变原理，电机转子采用驻极体材料制成，转子表面电荷的衰减时间常数要比驻极体本身形成的周期长得多。
In the end , we discussed the probabilities and superiorities of double - stator compressed electret micromotor as electret micro - pump by comparing it with magnetic pump . we also studied the application of compressed electret micromotor as microchip cooling fan 最后，通过将双定子扁平驻极体微电机与磁力泵进行比较，探讨了其作为驻极体微泵的可能性和优势，并研究了其作为微型芯片冷却风扇的应用。
It was demonstrated that this sort of load - control apparatus has superior performance . we used a electric transmitter as the transducer to collect the sound signal , using the daq toolbox of the matlab to achieve the collection of the sound signal , and using the dsp toolbox of the matlab and the sound - launch technology to analyze the time - domain characteristic and the frequency - domain characteristic of the signal , chiefly analyze its short - time average amplitude , its short - time over - zero ratio and its estimate of the power chart and the average - period chart 实验中使用了驻极体话筒作为球磨机声音拾取传感器，利用matlab中的数据采集( daq )工具箱实现对磨音的采集，利用matlab信号分析( dsp )工具箱和声发射技术对磨音进行时域和频域分析，主要分析磨音的短时平均幅度和能量、短时平均过零率、功率谱估计和平均周期图。
What ' s more , we realized the fea ( finite element analysis ) of electrostatic - field between stator and rotor of double - stator compressed electret micromotor with the aid of ansys and its apdl language . we got the rotary drive force of rotor in electrostatic - field and compared it with the one in theoretically . they are consistent with each other by the large 此外，运用ansys软件及其apdl编程语言实现了双定子扁平驻极体微电机定转子间静电场的有限元分析，得到了电机转子在静电场中受到的旋转驱动力，并将其与电机输出转矩的理论值进行了比较分析，其结果同理论值基本一致。
In this paper , we established a model of compressed electret micromotor and analysed the electrostatic force between stator and rotor based on the electro statics principle . and meanwhile , we worked out the theoretical calculation formula of output torque of single - stator micro - electrostatic motor series . we designed the double - stator compressed electret micromotor successfully and conducted the calculation formula of output torque of 2pole - 2pole compressed electret micromotor 本文基于静电学原理，进行了扁平驻极体微电机的建模，对其定转子间的静电力进行分析，导出了单定子微型静电电机系列的输出转矩计算公式，完成了双定子扁平驻极体微电机的设计，给出了2极- 2极扁平驻极体微电机的输出力矩计算公式。
