拖動(dòng)一架60噸的A320飛機(jī)，假如舍棄內(nèi)燃機(jī)而用電動(dòng)機(jī)......

caucsaa

前幾天，問了一個(gè)飛機(jī)拖車的問題，大家熱情幫助，在此感謝大家。
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0 [: X, z- o/ E! C: \$ {9 t現(xiàn)在又有一個(gè)新的問題：拖動(dòng)一架60噸的A320飛機(jī)以10KM/小時(shí)的速度滑行需要50KW，現(xiàn)在的拖車極其笨重，因?yàn)槭褂玫氖莾?nèi)燃機(jī)。假如使用電動(dòng)機(jī)，電動(dòng)機(jī)和電池的重量最低可以達(dá)到多少？
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5 w: N8 I/ [# O第一是電池：我知道電池的重量很大，但是我想：拖車的作用只是把飛機(jī)從航站樓拖到跑道上，大概5公里，半小時(shí)，因此需要25千瓦時(shí)的電量即可，所以只要一塊25千瓦時(shí)的電池即可，每拖一次飛機(jī)換一塊電池（不嫌麻煩，先降低重量）。按照目前的技術(shù)，有電池既可以有25千瓦時(shí)的電量，又能輸出50KW的功率嗎？如果沒有，在保證70KW功率的情況下，可以提高電量（可以多拖幾次飛機(jī)），但是要求還是重量盡可能低，多大的電池合適呢？
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2 |' G$ C0 q+ ^5 x2 a第二是電機(jī)：關(guān)于電機(jī)，我在網(wǎng)上能查到的最輕的50KW電機(jī)是60KG，據(jù)說國外還有更輕的。最輕的可以達(dá)到多少？

laodongbeiren

寶上有大把的電動(dòng)牽引車可以提供，還可以租，嫩為何不與賣家聊聊？

伏虎降龍

石油燃料能量密度大。

zerowing

先搞清楚最低重量需求再考慮是否該減肥和如何減肥。POWERPUSH只有55.1kw的功率。一輛思域就有103kw，但是你拿思域去拖一個(gè)試試？

伏虎降龍

飛機(jī)上有燃?xì)獍l(fā)電機(jī)的好像。

shaokuang

會(huì)不會(huì)拖車輕了，輪子與地面摩擦力不夠打滑？

伏虎降龍

50KW的內(nèi)燃機(jī)很重嗎？柴油機(jī)吧，如果為了輕便�？梢圆捎�
( [4 z! O5 t) @8 l（1）小型飛機(jī)用的活塞發(fā)動(dòng)機(jī)，但是要配置變速箱。
（2）摩托車賽車發(fā)動(dòng)機(jī)，連變速箱都是現(xiàn)成的。
這兩種方案達(dá)到50KW也是輕易的，功率密度都比電池大的多。

caucsaa

有廠家在研制電動(dòng)起落架，如果用電機(jī)和電池驅(qū)動(dòng)滾輪摩擦輪胎，重量能控制在多少？

datree

大俠，拖車只需把飛機(jī)往后推100米左右，之后飛機(jī)自己轉(zhuǎn)彎滑行去跑道的

動(dòng)靜之機(jī)

這個(gè)鏈接顯示，9年前就有嘗試在前輪上裝電動(dòng)機(jī)構(gòu)了。
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2 n3 s  Y& B- Hhttp://www.flightglobal.com/news/articles/tests-prove-electric-drive-concept-200792/

3 _1 i0 @7 z3 o6 i& l2 ~Tests prove electric-drive conceptSource:
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00:00 9 Aug 2005

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Success of Boeing 767 trial prompts effort to develop production version of powered nose-wheel system for taxiing

Boeing and electric-drive specialist Chorus Motors are in “active discussions” over possible follow-on work on a powered nose-wheel system for airliners following a successful series of tests on a proof-of-concept motor on a 767.

The ultimate plan would be to develop a fully integrated electric-drive system to allow aircraft to move around the airport without using their engines or tow tugs. The result, say the developers, would be more energy efficiency, increased engine life and reductions in maintenance costs and harmful environmental emissions.

“Overall, the results were extremely encouraging,” says Chorus Motors aerospace applications programme manager Robert Carman. Future challenges include making a “weight neutral” system, packaging within the existing nose wheel gear envelope, system integration and ensuring flight-critical levels of reliability. The tests were conducted in co-operation with Air Canada which supplied a 767-200 and crew. The pilots performed ground manoeuvres on slopes and terrains “typical of those at airports around the world”, says Boeing Phantom Works, which led the effort with Chorus. Evaluations included reversing away from a gate and taxiing forward to a runway. Tests also were performed at ramp temperatures exceeding 49˚C (120˚F) and at loads of up to 94% of the maximum take-off weight of the aircraft.

“We were in the neighbourhood of 300,000lb [136,200kg],” says Carman. “Up until now the technology has been lacking because no-one has been able to produce this sort of power density,” he adds. The Chorus-Boeing developed nose-wheel power device is based on a concept called the Meschon system.

GUY NORRIS/LOS ANGELES

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Design requirements: extra traction, increased torque Developed specifically for traction and higher low-speed torque loads, and applications for which starting torque requirements are greater than continuous torque requirements, the electric-drive system uses multi-phase motors in which the windings connect several inverter terminals to each other, and are not grounded in the conventional way. The different connectors act like different gear rates, and the motor can electronically change “gears” by operating the inverter at the harmonics of the drive frequency. The system therefore uses harmonic drive to essentially fool the drive electronics into thinking they are operating at a higher speed. The net benefit is that the motor drive is capable of achieving five times the torque speed of a similarly sized unit and is therefore much smaller and lighter.

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