L’elettrotecnica, l’elettronica e gli aerei

Generatori aerei passeggeri: 1 motore di avviamento principale/generatore, 2 auxiliary power unit (APU), 3 emergency ram air turbine (RAT), 4 groundpower unit (GPU) (da J. F. Gieras, Advancements in Electric Machines, Springer 2008)

Motore turboelica e generatori azionati dal motore

Provide power to start the main enginesTurbine engines must be accelerated to a high rotational speed in order to provide sufficient air compression for self-sustaining operation. Before engines are to be turned, the APU is started, generally by a battery or hydraulic accumulator. Once the APU is running, it provides power to start the aircraft's main engines

Many series -500 aircraft have an extra, dedicated APU battery to preserve main battery usage

APS 2000 APU del Boeing 737. 1 light switch, 2 APU fuel line,3 generator, 4 oil filter, 6 fuel nozzles, 7 upper shroud, 8 bleed air valve, 9 start motor, 10 oil tank, 11 bleed air manifold, 12 exhaust muffler

APU sul Boeing 737:carenatura APU ingresso aria di raffreddamento al

di sopra dello scarico

Ram air turbine of Airbus A320 located under left wing

Applicazione:generatore di tensione alternativa-sinusoidale(alternatore)

AC & DC Metering panel - Classic

Residual Volts: per testare un generatore che va fuori lineaSchiacciato il pulsante, se si vede tensione il generatore ruota ancoraSe son mostrati 0 V, è guasto e non sarà ricollegatoResidual volts: la sola selezione che usa la scala di 30 V sul voltmetro AC

AC & DC Metering panel - NG

CAB/UTIL IFE/PASS SEATRecirculation fan(s) 115V AC audio

IFEDoor area heaters 115V AC video IFE

Drain mast heaters 28V DC video IFE

Lavatory water heaters

Airphone equipment

All galley buses Pax seat elec outlets

Shaver outlets  Logo lights  Potable water comp  

BatterieBatteria 36 Ah, 24 V, 20 celle, Nickel-cadmium 30 minutes (20 mins 1/200's) of standby power if all other generators fail.Batteria APU - opzionale – principalmete per avviare l’APU (auxiliary power unit);anche in parallelo con la batteria principale45’ di alimentazione standby

Batteria Ausiliaria – di riserva sul NG – normalmente isolata, unless the main battery is powering the standby system when it operates in parallel with the main battery. The aux battery combined with the main battery will provide 60’ of standby powerNG: 2 extra dedicated batteries for the engine and APU fuel shut off valves and the ISFD (150’ capacity).

BAT OVHT & APU BAT OVHT (overheat, surriscaldamento) lights are a customer option on classics. They are located on the aft overhead panel and no crew action is required if they should illuminate.

RADAR - RAdio Detection AndRanging

The TCAS algorithm selects the maneuver “sense” that provides the largest separation at the predicted closest point of approach (CPA)