The matched generator is a high efficient 4-pole double feeding generator with wound rotor and slip windings.

所配发电机是一台高效率的4极双馈式发电机，带有绕组转子和滑差线圈。

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Utilizing the information observed, a new type of slip frequency controlled torque-speed double closed loop system is developed.

基于观测出的状态信息，构成了转差频率控制的转矩速度双闭环新型变频调速系统。

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On the basis of analysis of block diagram of AC speed driver system with speed and slip ratio double closed loops, a system design method is presented with the four quadrants experiment results.

在分析转速、转差双闭环交流调速系统动态结构图的基础上，提出了系统的设计方法，并给出了四象限运行实验结果。

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Federer let the match slip with a double-fault and four unforced errors, but played down his disappointment at missing out on the top ranking.

BBC: Roddick sweeps past Federer

The MPs' arguments will intensify the debate in the coalition government about how to reverse the slide in the economy, which has seen the UK slip into a double dip recession.

BBC: British workers 'among worst idlers', suggest Tory MPs

Yes, the US economic recovery is mediocre, but the US economy is still growing and there is almost no chance, short of some unforeseen economic disaster, that could cause the US to slip back into a double-dip recession.

FORBES: Five Fundamentals Driving Current Stock Market