本文介绍了一个控制桥式起重机的变频调速系统，它根据桥吊的特殊性能要求，采用矢量控制方式，具备平滑调速、能量回馈、顺序制动等功能。
According to the special requires of bridge crane, it adopts the vector control theory, has functions of regulating speed smoothly, energy feed back, sequence brake etc.
本文研究的电磁阻尼器是一种特殊结构的空心杯发电机，它主要用于对能量的吸收和耗散，达到减振消能的目的，是具有很高单位耗能的能量吸收元件。
The electromagnetic damper studied in this paper belongs to a special kind of coreless generator, which is used for the energy absorption and dissipation in order to weaken vibration.
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