查询词典 direct-current converter

Based on analysis to the principle of back-to-back converter for direct-driven variable speed constout frequency WECS,phase lock loop based sensorless control strategy was adopted to determine the speed and phase angle of PMSG,and its work principle and realization method are analyzed in detail.

在分析直驱型变速恒频风电系统背靠背变流器工作原理的基础上，采用锁相环无速度传感器控制策略对永磁同步发电机的速度和相位进行观测，对其工作原理和实现方法进行了分析。

Permanent magnet synchronous generator ; direct-driven wind energy conversion system ; sensorless control ; back-to-back converter ; phase lock loop

永磁同步发电机；直驱风电系统；无速度传感器控制；背靠背变流器；锁相环

Proposed DSP engine consists of rectangular to polar converter and digital phase modulator that are designed based on the COordinate Rational DIgital Computer and Direct Digital Frequency Synthesizer algorithm respectively.

所提出来的数位讯号处理引擎包含了座标转换器和数位相位调变器，两者分别是利用数位座标旋转器以及数位频率合成器来实现。

Direct-drive wind power system, permanent magnetic synchronous generator, converter, vector control

直驱式风力发电系统；永磁同步发电机；变流器；矢量控制

To meet the requirement for the low-voltage and high-power output,direct-drive wind power generation system employed the topology which combines the dual-three phase permanent magnet synchronous generator and parallel converter technique.

为满足低压大功率输出的要求，直驱式风力发电系统采用双三相永磁同步发电机和变流器并联技术相结合的拓扑结构。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。