ELEC 279 > Mod 6-7-8 > Flashcards

Mod 6-7-8 Flashcards

(61 cards)

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1
Q

A TRU is a ______ rectifier unit.

A

Transformer

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2
Q

process of converting AC to DC

A

Redtification

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3
Q

____ inverter uses a motor connected to a generator to convert DC to AC voltage.

A

Rotary

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4
Q

_____ are used in rectifier circuits.

A

Diodes

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5
Q

Changes DC voltage to a different value of DC voltage

A

converter

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6
Q

____ inverters are solid state, with no moving parts

A

static

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7
Q

TRUs are often found on _____ aircraft.

A

Larger

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8
Q

The full wave bridge rectifier uses a transformer and _____ diodes.

A

four

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9
Q

Transformers are used to ______ AC voltages from one level to another.

A

covert

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10
Q

What component on an aircraft converts DC voltage to AC voltage?

A

Inverter

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11
Q

What component on an aircraft converts AC voltage to DC voltage?

A

TRU

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12
Q

What does TRU stand for?

A

Transformer Rectifier Unit

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13
Q

If you wanted to convert 115VAC to 26 volts AC, the easiest way would be to use a?

A

Transformer

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14
Q

If I connect a DC motor to an AC generator, I’m basically converting DC to AC, we call this a _______________ on an aircraft.

A

Rotary inverter

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15
Q

when we convert AC to DC on an aircraft we call it a ___, and when we convert DC to AC we call it an ______

A

TRU - Inverter

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16
Q

An inverter (DC to AC) made out of all “solid state” parts (electronic components) is called a

A

Static Inverter

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17
Q

Frequency wild” means there is _____________________, and can only be used for things like lighting, heaters and TRU’s.

A

no frequency control/regulation

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18
Q

What controls the frequency on an AC generator?

A

CSD or IDG.

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19
Q

If I lose one of my generators (Fails in flight), and the remaining one cannot handle the electrical load the ______________ will automatically shed (disconnect) all none critical loads like entertainment systems, coffee makers, ovens and the like.

A

BPCU Buss Power Control Unit

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20
Q

The voltage and output current are controlled by the ____________

A

Voltage regulator.

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21
Q

You control the voltage out of a brushless AC generator by varying the DC current to the________

A

Exciter field.

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22
Q

What are the main functions of the GCU?

A

Voltage regulation, Gen line contactor control, over voltage protection, over and under load protection, and reverse current and differential voltage protection.

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23
Q

A three phase generator is just 3 single phase generators stuffed into one housing separated by ____degrees.

A

120

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24
Q

What is meant by a split buss and a parallel Buss?

A

In a split buss system only one source of power is provided to a buss at any given time.

in a parallel buss More than one source of power can be on the buss as long as conditions are met.

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25
The ____ controls load shedding for in the electrical system.
BPCU
26
To match AC generators, frequency, voltage and\_\_\_\_ must be closely matched.
phase
27
a CSD is a _____ speed drive.
Constant
28
Frequency wild is when there is no ____ of the output frequency of the AC generator.
control
29
\_\_\_\_\_ Current protection is necessary so the battery does not feed back to the generator.
Reverse
30
IDG stands for Integrated _____ generator.
Drive
31
The purpose of a Voltage ____ is to maintain a constant output under varying output current.
Regulator
32
AC generators are controlled by ____ the amount of DC current in the Exciter field.
varying
33
The _____ system does not need to be paralleled
Split Bus
34
The ________ Control Unit has many different functions, including Voltage Regulation.
Generator
35
How is the APU generator frequency controlled?
It isn’t, an APU is a constant speed motor
36
How many generator can power a given bus at a time?
ONE! On a split bus system.
37
List the 5 possible sources that can power the Essential bus on a Split bus distribution system
ANY/ALL. GEN 1, GEN 2, APU, GND PWR, of ADG, but only ONE at a time.
38
What is an ADG? What’s a RAT?
AIR Driven Generator, RAM AIR TURBINE, same thing
39
TRUs contain a _____ Transformer.
stepdown
40
The APU will run at a ____ speed, so does notneed a CSD.
constant
41
The SAIT Challengers have _____ TRUs.
four
42
All Generators maintain equal load sharing in a\_\_\_\_\_ bus system.
parallel
43
A RAT is a ____ air turbine
RAM
44
On smaller aircraft, a _____ is used to convert the 115VAC to 26VAC.
Transformer
45
The TRU uses ____ phase AC voltage as its input.
three
46
BITE stands for ____ in test equipment
built
47
The ______ is the final stage of a static inverter.
amplifier
48
An ADG is an ____ driven generator
Air
49
TYPE OF RECTIFIER
HALF WAVE RECTIFIER
50
TYPE OF RECTIFIER
FULL WAVE RECTIFIER -CENTER TAP TRANSFORMER
51
TYPE OF RECTIFIER
FULL WAVE BRIDGE RECTIFIER
52
The output of the AC generator is determine by ?
The amount of DC current applied applied to the rotating field winding.
53
What does the GCU?
provides the voltage regulation function by controlling the current in the field winding
54
funtions of the AC Generator control unit (GCU)
* voltage regulator * generator line contactor control * overvoltage protection * overload and under voltage protection * reverse current and defferential voltage protection
55
what is the BPCU?
Bus power control unit is the controller thats performs load shedding function.
56
When generators provides power for split buss\_\_\_\_\_\_\_\_\_\_\_\_
their is no need for a parallel
57
when generators provide power for a parallel buss\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
they need to be parallel
58
what are the conditions that need to be met in order to parallel AC sourses
Voltage, frequency and phasing must be very closely matched
59
AC Frequency wild
* A/C Generator driven from the engine with no CSD or IDG * Frecuency follows engine RPM * saving on wheight and maintenance * used where components are not sensitive to frequency
60
what tpe of power distribution system is this
parallel buss all the Gens will be tide togheter by tide buss
61
what tpe of power distribution system is this
Split bus Both GEN wont run the same buses but you can make one Gen run the other one
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