电气部件修理10(照明设备)课件.ppt

1、电气附件修理课程涵盖的签署项目 ELC01：飞机电源系统设备修理 ELC02：电动机修理 ELC03：蓄电池修理 ELC04：机上电器设备修理：机上电器设备修理ELC04：机上电器设备修理 ELC041：厨房设备修理 ELC042：照明设备修理：照明设备修理 ELC043：电器附件修理（电缆、电门、控制面板、火警线、控制器、探测器组件）737NG 灯光系统737NG 客舱灯光系统737NG 客舱灯光系统顶灯控制 特点:泛光照明LED(737CL为日光灯管),由整流器驱动737NG 客舱灯光系统阅读灯控制 特点:普通白炽灯(有些飞机LED),无特殊驱动电路A330客舱旅客阅读灯控制 特点：LED

2、灯,由客舱构型软件管理和微电脑控制737NG 机外灯光系统737NG 机外灯光系统着陆灯控制 特点:大功率白炽灯,可收放式灯还有马达(737CL的可收放着陆灯装在襟翼上，内部有位置补偿电门)737NG 机外灯光系统防撞灯控制 特点:氙气弧光灯管,需要专用频闪触发电源737NG 应急灯光系统737NG 应急灯光控制(典型)特点:由专用充电电池供电;紧急情况下点亮客舱照明日光灯管10-1327原理参HONEYWELL CMM 33-20-51 电源电路(整流、稳压)D1,VR1 控制电路(PWM、亮度、FET驱动)U1 启辉电路(激发灯丝电子)C11 高压自感(加速灯丝电子)L2,Q1,Q2 原理

3、：U1的PWM驱动启辉器Q1/Q2，后者输出高压高频方波，经C10/L2谐振为正弦波后为灯丝提供工作电流。启动时C11导通，灯丝预热而激发出电子。然后C11断路，L2感应出高压，电子在灯管内加速定向移动，引发氩气电离和水银电离，弧光放电发出紫外线，激发荧光粉发光。客舱照明日光灯管10-1327原理可收放式着陆灯45-0083工作原理参考HONEYWELL CMM 33-40-15结构：灯(15 Vac,450 W)微动电门 变压器 马达 齿轮箱可收放式着陆灯45-0083工作原理可收放式着陆灯45-0083工作原理可收放式着陆灯45-0083工作原理OPERATION:With the OVE

4、RRIDE switch OPEN and the ON/OFF switch to ON,the retractable aircraft landing light will operate in the automatic mode as follows:(a)Momentary contact switches S4 and S5 are controlled by the aircraft flaps by an adjustment arm.When the inner canopy is extended,both momentary contact switches S4 an

5、d S5 are held open.When the flaps are moved,momentary contact switch S4 or S5 will close,and the motor will extend or retract the inner canopy accordingly.(b)Switches S6 and S7 are both normally closed and will open and stop the motor when inner canopy is fully extended or fully retracted,respective

6、ly.(c)When the motor is not energized,the canopy is held in place by a spring-held,electromagnetically released brake,which is an integral part of the motor assembly.Silicone diodes CR1 and CR2 let current to release the motor brake when the motor is energized.(d)Thermostatic switch S9 is mounted on

7、 the motor case and opens the circuit if the motor overheats above 325 F(163 C).Thermostatic switch S9 resets when the motor cools below 275 F(135 C).(e)Switch S8 is mounted beside switch S7 and closes when the inner canopy extends.(f)Transformer T1 steps down the 115-VAC input power to 15 VAC for u

8、se by lamp DS1.可收放式着陆灯45-0083工作原理翼尖频闪灯及其电源组件参考CMM 33-42-22,33-50-57翼尖频闪灯及其电源组件(1)An input of 28 VDC is applied to the primary winding of flyback transformer T1 through choke L1.This causes transistor Q3 to oscillate.The stepped-up voltage from the secondary winding of transformer T1 charges storage

9、capacitors C9 and C10 to approximately 400 volts.Diode VR1 and capacitor C2 provide a 10-volt potential for the timing and afterglow circuits.(2)Potentiometer R26 controls the flash rate frequency.potentiometer R16 controls voltage limiting.(3)The positive pulse from the quad comparator U1,Pin 2,is applied to the gate of the silicon-controlled rectifier SCR1.This causes the silicon-controlled rectifier SCR1 to fire.Capacitor C7 discharges through the trigger transformer of the accessory light and causes the strobe to flash 40 to 50 FPM.翼尖频闪灯及其电源组件翼尖频闪灯及其电源组件