勵磁器上包括一個 6柱直流磁場和一個轉(zhuǎn)子電樞。激勵磁場由電壓調(diào)節(jié)器來的直流電源提供，使得在勵磁電樞中引出 3相電壓。這 3相電壓被整流并注入交流發(fā)電機轉(zhuǎn)子磁場，在交流定子電樞輸出可用的115V電壓。

(6) The constant speed drive(CSD) is located on the left side of the engine, on the front of the accessory gearbox. The purpose of the CSD is to convert the variable speed of the engine to a constant speed for the driven generator to produce ac power at constant frequency.

恒速傳動裝置位于發(fā)動機的左側(cè)，附件齒輪箱前面。恒速齒輪箱的作用是將發(fā)動機變化的速度轉(zhuǎn)換成恒速，以使發(fā)電機產(chǎn)生恒頻交流電。

(7) The electrical power for the ground operation of all electrical loads on the airplane is supplied by an external 3-phase, 115vlot , 400Hertz alternating current system. The power is supplied through an external power receptacle. The ac external power receptacle is located on the right side of the airplane forward of the nose wheel well.

飛機在地面進(jìn)行操作時，使用外部的 3相 115v，400Hz交流電源。外部電源通過一個外部電源插座連接飛機系統(tǒng)。外部交流電源插座位于飛機前輪艙右側(cè)。

(8) The battery is located in the electronic compartment, left side just forward of the E2 rack. The purpose of the battery is to provide dc power to critical airplane systems in absence of normal dc supply from the transformer rectifier. It is also used as a backup power for the ac system control and protection and for starting the APU.

電瓶安裝于電子設(shè)備艙，E2架左側(cè)。電瓶用來在無法通過轉(zhuǎn)換整流器
得到正常直流電時為飛機關(guān)鍵系統(tǒng)提供直流電。同時也作為直流系統(tǒng)
控制、保護(hù)及 APU啟動的備用直流電源。
(9) Three transformer rectifier units are located in the electronic compartment on E3 rack. The purpose of the 3 transformer rectifiers is to convert 115 vlot ac ,400Hz, 3-phase power to 28 vlot dc power for use by the airplane’s systems.

3個整流器組件位于電子設(shè)備艙 E3架上。他們的作用是將 115v， 400Hz交流電轉(zhuǎn)換成飛機系統(tǒng)使用的 28v直流電。

(10)  
The purpose of electrical power distribution system is to provide and control generated ac and dc power for use by the various airplane systems, the distribution system consists of 115 volt ac, 28 vlot ac and 28 vlot dc power obtained from generators and battery.

電源分配系統(tǒng)的作用是提供并控制飛行不同系統(tǒng)所使用的交流、直流電源，分配系統(tǒng)包括從發(fā)電機和電瓶來的 115v交流電，28v交流電及28v直流電。
LESSON 12 FUEL燃油
一、單詞二、TEXT
燃油  Fuel 存貯  Store 運送  Deliver
細(xì)分  Subdivide 貯藏  Storage 加燃油  Fueling
油箱  Tank 通氣裝置  Vent 通氣均壓油箱  Vent surge tank