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变桨系统中伺服电机的转速检测与控制 被引量:1
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作者 刘保民 谢扩军 《应用能源技术》 2010年第9期40-42,共3页
在变桨系统中,对伺服电机的转速控制和位置检测至关重要,利用旋转变压器检测转速和旋转变压器-数字转换器AD2S90对转速信号处理。介绍了AD2S90芯片的工作原理以及三种输出信号模式,重点阐述VEL信号的使用。并同时介绍了电机转速控制的方... 在变桨系统中,对伺服电机的转速控制和位置检测至关重要,利用旋转变压器检测转速和旋转变压器-数字转换器AD2S90对转速信号处理。介绍了AD2S90芯片的工作原理以及三种输出信号模式,重点阐述VEL信号的使用。并同时介绍了电机转速控制的方法,给出了一个由AD2S90构成的处理旋转变压器输出信号的电路,具有一定的实用意义。 展开更多
关键词 变浆系统 旋转压器-数字转换器 VEL信号 电机转速控制
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Vestas风力发电机组的特点 被引量:1
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《风力发电》 2000年第1期12-16,共5页
关键词 风力发电机组 三叶片 系统
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Influence of mortar gap on natural vibration frequencies of high-speed railway track-bridge system 被引量:4
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作者 LIU Shao-hui JIANG Li-zhong +1 位作者 ZHOU Wang-bao FENG Yu-lin 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第8期2807-2819,共13页
Based on Hamilton’s principle, the differential equations of free vibration of track-bridge systems with mortar gap are derived. Hence, a method for calculating the natural frequencies of track-bridge systems is prop... Based on Hamilton’s principle, the differential equations of free vibration of track-bridge systems with mortar gap are derived. Hence, a method for calculating the natural frequencies of track-bridge systems is proposed. The influence of the flexural stiffness of the track-bridge system, the vertical and longitudinal stiffness of the mortar layer,gap position and gap length on the natural frequencies of a track-bridge system is discussed. The results show that the natural frequencies of the track-bridge system are more sensitive to the change of the flexural stiffness of the bridge layer. The change of the longitudinal stiffness of the mortar layer and gap position has no obvious effect on the trackbridge system’s natural frequencies, while the interlayer vertical stiffness has a larger impact. The gap length has a more significant effect on the 4th-5th order natural frequencies of the track-bridge system. The range of the natural frequencies that are affected by the gap widens as the gap length increases. 展开更多
关键词 shear deformation track-bridge system mortar gap vibration frequencies
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