It is demonstrated that direct drive electro-hydraulic servo system can replace the traditional electro-hydraulic servo system in the low frequency response.
结果表明，在频响不高的场合直驱式电液伺服装置完全可替代传统的电液伺服装置。
Based on the principle of piezoelectric drive, we make an explorative study of a novel feeding device with vibration of high frequency and low amplitude.
基于压电驱动的原理，本文对高频低幅的振动给料技术进行了探索，研制出一种具有长环形输送振子的行波型超声物料输送装置的模型样机。
The carrier phase shift technique based parallel back-to-back PWM converter is used on the direct-drive wind power system, with a switching frequency as low as 1 kHz.
直驱型风力发电系统需要全功率变流器，在现有器件功率水平以及开关频率等诸多因素制约下，变流器直接并联的方式具备结构简单、模块化设计、易扩展的优点。
The carrier phase shift technique based parallel back-to-back PWM converter is used on the direct-drive wind power system, with a switching frequency as low as 1 kHz.
直驱型风力发电系统需要全功率变流器，在现有器件功率水平以及开关频率等诸多因素制约下，变流器直接并联的方式具备结构简单、模块化设计、易扩展的优点。
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