| 翻訳と辞書 |
| Flux switching alternator ： ウィキペディア英語版 |
Flux switching alternator
A flux switching alternator or inductor alternator is a form of high-speed alternator, an AC electrical generator, intended for direct drive by a turbine. They are simple in design, making them rugged and capable of high rotation speeds. This makes them suitable for their only widespread use, in guided missiles.
== Guided missiles ==
Guided missiles require a source of electrical power during flight. This is needed to power the guidance and fuzing systems, possibly also the high-power loads of an active radar seeker (i.e. a transmitter) and rarely the missile's control surfaces. Control surface actuators for a high-speed missile require a high force and so these are usually powered by some non-electric means, such as tapping propellant exhaust gas from the missile's motor. Rare exceptions where electrically powered control surfaces are used are mostly medium-range subsonic naval missiles, e.g. Exocet, Harpoon and Martel. The total load varies for different missiles between around 100W to several kW.〔
The electrical supply for a missile must be reliable, particularly after long storage. Depending on the missile type, it may also be required to start delivering power almost immediately after start-up, or even before launch to allow gyroscopes to be accelerated to speed,〔 and to provide power for varying lengths of time.〔 Small anti-tank or air-to-air missiles may only require power for a few seconds of flight. Others, such as tactical missiles or ICBMs, may require power for several minutes. Turbojet-powered cruise missiles have the longest flight times (being long-ranged, yet also slowest in flight) however these also have engines that are capable of driving a more conventional generator.
Two technologies are used in practice to power missiles: batteries and generators. The batteries used are usually esoteric types rarely found outside missiles, such as silver-zinc or thermal batteries. The generators used are simple high-speed generators, driven directly by a turbine rotor that is powered by either the rocket motor's exhaust, or else a dedicated gas generator.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Flux switching alternator」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|