文中导出了计算直流电机换向器片间电压分布曲线的基本公式和试验验证；
Basic formulas for the calculation of bar to bar voltage distributing curve of DC motor commutator are derived and test-verified.
本文论述了宽调速比直流电动机无火花换向区曲线分散的基本原因，并给出工程控制措施。
The paper introduces the basic cause of the sparkless space dispersion for DC motor with the wide adjustable speed ratio, and gives the control methods of projects.
阀芯的特殊结构，保证任意两缸换向时的流量曲线的良好衔接，从而减少换向冲击。
Special structure of the spool can ensure that the flow curve of any change to the two-cylinder has the good convergence, and thereby the shock of exchange is reduced.
该控制器可同时控制多台步进电机按曲线方式运行，包括加减速、定位及换向功能等。
The controller can control many step-motor systems in the meantime, and made motor run in multi-curve including speed-up, speed-down, orientation and direction's change.
该控制器可同时控制多台步进电机按曲线方式运行，包括加减速、定位及换向功能等。
The controller can control many step-motor systems in the meantime, and made motor run in multi-curve including speed-up, speed-down, orientation and direction's change.
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