风电专业词汇翻译，急！

【专家解说】：(1) double-fed variable speed propeller aircraft (2) direct drive permanent magnet variable speed propeller aircraft (3) stall speed of the propeller models for In addition, the following words: variable speed propeller, the propeller speed set (direct drive), and change the propeller speed (take the initiative to stall), the propeller fixed speed (high-speed permanent magnet)