Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [power-electronics]

Refers to the conversion of electric power by using solid state components such as semiconductors. Can also generally apply to the field of electrical engineering which works with power electronics.

Power Electronics deals with the transformation of power to suit a needed purpose. Applications include switch-mode power supply design and motor drives.

Some assorted books on the subject:

  • Power Electronics: Converters, Applications, and Design, Mohan et al. (Considered a standard undergrad power electronics textbook in the US.)
  • Transformer and Inductor Design Handbook, McLyman
  • Switching Power Supply Design, Pressman
  • Switchmode Power Supply Handbook, Billings
  • Switching Power Supply Design and Optimization, Maniktala
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Where does electricity go after being used?

For a very long time I have been wondering, where does electricity go after being used? When I use my tablet it runs from a battery. Where does the power go?
Ethan T.
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Is it safe to simply cut the power to an electronic device instead of using its power switch?

I have a pair of powered studio monitor speakers for my PC. Each speaker has a dedicated on/off power switch on the back. It's inconvenient to reach around behind the speakers to turn them on and off each day, so I have both of them plugged into a…
Michael
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What's the easiest way to prevent a voltage input getting higher than a fixed value?

I just got a DC-DC step-up converter for my laptop, and I want to make double sure in case it malfunctions it will never affect my laptop. I am looking for an extra security device to prevent the voltage from getting higher than 19v. What would be…
Sime
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What do you mean by a Wattage of an incandescent bulb?

How do I interpret the wattage of a bulb. For example when it is said that the bulb is rated for 60 W , what does that mean?
IamDp
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What does it mean that a resistor has value of 56E?

I found on one schematic that has resistor with value 56E. I don't know what does that mean. Can you give me some information, please.
mitesh gandhi
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What are the advantages/disavantages on using CCM or DCM in boost converter?

When should we choose continuous conduction mode (or discontinuous) when designing a boost converter?
Miguel Duran Diaz
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PV Microinverter Topology Explanation

Can anyone explain how this topology works and/or point me to any literature where it is discussed? I've found Microchip's application notes on single stage interleaved flybacks with SCR or MOSFET unfolding bridges and have a pretty good…
Red Dragon
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1117 Regulator input voltage

First, a little background - I'm working on replacing an old (late 1970's) output driver board. The old equipment this came off of has a very dirty and poorly-regulated 5V system. Since I'm using newer pieces and replacing some address decoders…
Coyttl
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Can someone please help me with these questions on DC Chopper Circuits?

I had a quiz on power electronics and the following questions were asked: Question 1: Consider the buck chopper in Figure 1, operating at 100 kHz frequency, with the switch duty ratio of 0.5 and input voltage of 100 V(DC). The load is resistive…
mosfet
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BJT configuration

For the three basic common BJT amplifiers, Common Emitter, Common Base, Common Collector. How do you differentiate them? I was told that the term "common" because the particular leg is the common node or grounded between the BJT. However, I do see…
Ace8888
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Why is gallium nitride used in power electronics? Are there any alternatives available?

I'm preparing for a seminar related to variable gain amplifier. I read that GaN/AlGaN are used. I wish to know why they specifically use them.
Mathumathi Anblagan
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What does the line to line voltage mean?

What does the line to line voltage mean? For WYE connection is Vna line to line or Van? How about Delta connection?
Kingkong
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DC current source into capacitor - does capacitor voltage rise infinitely?

I would like to check my understanding. Scenario 1 : Constant Current Source with no parallel resistance Consider the following circuit, I = C (dv/dt) Since, I is constant, dv/dt should be a constant slope and capacitor voltage should continue to…
AlfroJang80
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Clarifying line-to-line versus phase voltage of 3-phase rectifiers

For example, my supply is 415 volts RMS (line-line). So if I multiple it by sqrt2 to get the peak voltage. That’s a phase voltage, I believe. If I rectify this supply and get an output voltage waveform, it’s the peak of this voltage waveform a line…
Kwaku E. Biney
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Why is it bad to have an inductive load (context: dc-dc converter)?

In the book I'm studying from Power Electronics - Mohan he says: (...) has two drawbacks (1): In practice the load would be indictuve. Even with a resistive load, there would always be certain associated stray inductance (...) This is in…
Miguel Duran Diaz
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