Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Power Elecronics 2 > Switch mode DC-DC converters > Flashcards

Switch mode DC-DC converters Flashcards

1
Q

What are some advantages of switch mode power supplies

A 
Smaller transistor
smaller current rating 
Heatsinks for cooling
Greater power density 
Wider variety of input voltages
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are some disadvantages of switch mode power supplies

A

Noisy, slow due to filtering and less reliable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are step up and step down and inverting converters called

A

Step up - Boost
Step down - Buck
Inverting - Buck- Boost

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Give an example of DC-DC amplification

A

DC Motors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the equation for the energy stored in a Capacitor

A

E= 1/2 x C x V^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the equation for energy stored in an inductor

A

E = 1/2 x L x I^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When does the inductor charge

A

When switch is on

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe the Buck converter circuit while charging

A

Switch on Diode off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe the Buck convertor while discharging

A

Switch off Diode On

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the equation for the Voltage output of a buck convertor

A

Vout = Vin x D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the equation for the mean output current for a buck convertor

A

Iout = Iin/D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the power equation for a buck convertor

A

P= I x V

Pin=Pout

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What in the equation for duty cycle

A

D = Ton/Tcycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the equation for the load voltage in a buck convertor

A

VL =Vin - Vout

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Given the current time graph what is the average current

A

Iavg = area under graph / T cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the equations for max and min current for a buck convertor

A 
Imax = Iout  x D + Iout
Imin = Iout x D + I out
17
Q

What does the load voltage equal for a Boost converter

A

Switch open VL= Vin-Vout

When switch is closed VL= Vin

18
Q

What is the voltage equation for a boost converter

A

Vout= Vin/(1-D)

19
Q

What is the current equation for a bust convertor

A

Iout = (1-D) x Iin

20
Q

For an inverting (buck-boost) converter how do the input and output voltages relate

A

-Vout <>Vin

21
Q

What is the Voltage across the load equal to during charging and discharging For a buck boost convertor

A

Charging VL= Vin

Discharging VL = -Vout

22
Q

What is the voltage for a buck-boost converter

A

Vout= (DxVin)/(1-D)

23
Q

What is the current equation for a buck-boost equation

A

Iout= (1-D) x Iin

24
Q

What is true for all converters

A

Input power = output power

25
Q

Buck, Boost and Inverting power supplies are called off-line power supplies, what does this mean

A

They cannot be used directly from the mains

Power Elecronics 2 (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions