2014.04.05【英译中】交流发电机③

猫四狗八 (ho) 路人甲
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发表于:2014-04-05 19:35 [只看楼主] [划词开启]

9. The brushless high-speed alternator was also developed to eliminate DC exciters with their associated commutators and brush gear. The alternator and exciter rotors are on a common shift, which also carries the rectifiers. The exciter output is fed to the rectifiers and then through conductors in the hollow shaft to the alternator field coils. An automatic voltage regulator is used with this type of alternator.

9 无刷的调节器能够取代结合换向器和电刷机构的直流励磁机。发电机和励磁转子是同轴的,带有整流器。励磁机的输出传输给整流器,然后又通过中心轴上的导线传递给线圈。这种发电机使用的是自动稳压器。

 

10. The construction of an alternator can be seen in the following Picture. The rotor houses the poles which provide the field current. Slip rings and a fan are also mounted on the rotor shaft, which is driven by the auxiliary engine. The station core surrounds the rotor and supports the three separate phase windings. Heat is produced in the various windings and must be removed by cooling. The shaft fan drives air over a water-cooled heat exchanger. Electric heaters are used prevent condensation on the windings when the alternator is nor in use.

10  发电机的结构如下图。转子容纳提供场电流的磁极。滑环和风扇也安装在转轴上,由副机驱动。定子围绕转子提供三相绕组,线圈必须冷却下来。轴带风扇驱动气流通过冷水换热器。电子加热器用于发电机不用时,避免绕组结水。

 

11. In the event of a main generating system failure an emergency supply of electricity is required for essential services. This can be supplied by batteries, but most merchant ships have an emergency generator. The unit is diesel driven and located outside of the machinery space. The emergency generator must be rated to provide power for the driving motors of the emergency bilge pump, fire pumps, steering gear, water tight doors and possibly fire-fighting equipment. Emergency lighting for occupied areas, navigation lights, communications systems and alarm systems must also be supplied. Where electrical control devices are used in the operation of main machinery, these too many require a supply from the emergency generator.

11  主发电系统也有可能会故障,所以关键的设备还需要应急电源。这可以由蓄电池提供,但商船上也有应急发电机,它是柴油机驱动的,就位于机舱外面。应急发电机的额定功率必须能满足应急舱底泵,消防泵,舵机水密门的驱动,还可能用于消防设备,居住区的应急照明,航行灯,通讯设备和应急系统。许多主要机器都是电力驱动的,这些都需要应急发电机。

 

12. A switchboard in the emergency generator room supplies these various loads. It is not usual for an emergency generator to require paralleling, so no equipment is provided for this purpose. Automatic start-up of the emergency generator at a low voltage value is usual on modern installation.

12 应急发电室的配电板将电力分配给各项电路。应急电机很少并车,因为没有多余的配电板。低电压自启的发电机应用较广。

 

最后编辑于:2014-04-05 19:36
分类: 英语
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