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    • 3. 发明授权
    • Aircraft engine unducted fan blade pitch control system
    • 飞机引擎风扇叶片变桨控制系统
    • US4927329A
    • 1990-05-22
    • US260645
    • 1988-10-21
    • Gerald B. KlimanDonald W. Jones
    • Gerald B. KlimanDonald W. Jones
    • B64C11/44F01D7/00F02C3/067F02K3/062
    • F02K3/062F01D7/00F05D2260/74F05D2260/76Y02T50/671
    • An electric motor driven blade pitch varying system for the fan blades of an unducted fan type aircraft gas turbine engine utilizes permanent magnet alternating current motors located in the oil sump region of the engine. An alternator driven by the engine generates unregulated variable frequency, variable amplitude power which is rectified and placed on a DC bus. Controlled inverters convert the DC power on the bus to appropriate AC power for the motors. The system incorporates redundancy without significant weight penalty by providing alternators and motors dividing into two independent operating sections on common shafts. Separate electronic circuits are provided to supply power for each sectionalized motor or to rectify power from each alternator section. A common power bus may be used to couple the multiple motors and alternators. The common bus may alternatively receive power from tbe aircraft 400 Hz system or from on-board batteries.
    • 一种用于风扇型飞机燃气涡轮发动机的风扇叶片的电动机驱动叶片变桨系统利用位于发动机的油底壳区域中的永磁交流电动机。 由发动机驱动的交流发电机产生未调节的可变频率,可变幅度功率,其被整流并放置在DC总线上。 控制变频器将总线上的直流电源转换为电机的适当交流电源。 该系统通过提供在公共轴上分为两个独立操作部分的交流发电机和电动机,实现冗余,而不会显着减轻重量。 提供单独的电子电路以为每个分段电动机供电,或者对来自每个交流发电机部分的电力进行整流。 可以使用公共电源总线来耦合多个电动机和交流发电机。 公共总线可以替代地从飞行器400Hz系统或从车载电池接收电力。