MD-90飞机的变速恒频发电系统

MD-90 ' s VSCF Electric Power System

变速恒频(简称VSCF)发电系统是在电力电子技术迅速发展的基础上,研制开发的一种新型飞机电源系统,用来取代传统的恒速恒频(简称CSCF)电源系统.VSCF发电系统利用电子变换器,把飞机发动机直接驱动的变频交流发电机产生的变频交流电,变换成115/2O0伏、4O0赫3相交流电,以满足飞机用电设备的需要.VSCF电源与CSCF电源比,其发电效率要高近1O个百分点,而且还具有供电质量高,无频率瞬变现象;可靠性高,寿命期费用低;便于生产、使用和维修等优点.

This article introduces the VSCF electric power system used in the MD-90 airliner. The composition, operational principle and features of the system are presented. The system is compared with the VSCF electric power system used in Boeing 737. Because the electronic converter of the MD-90'5 system is installed at the position far away from the engine, it has good reliability and operational stability.