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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.

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Does Thyristor (SCR ) works for Inrush current protection?

Does a SCR ie Thyristor work for Inrush current protection in a circuit ?
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55 views

Delamination in Pb-free solder joints

It is worth knowing that two material types are commonly used for soldering power semiconductor chips (IGBT, MOSFET, ...) to DBC substrate inside power electronics modules. They are Pb-rich and Pb-...
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1answer
115 views

Triggering the thyristor for the single phase AC voltage controller in MATLAB

I have been trying to study the output characteristics of a thyristor based single phase AC voltage controller through the model in the picture attached. Could anyone tell me what I could do to ...
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1answer
415 views

Three-phase thyristor rectifier - Minimum firing angle

Why is a minimum firing angle (>0, usually 5-15°) defined for three-phase thyristor rectifier? I would like a technical explanation. Thanks
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0answers
38 views

One lipo battery to supply multiple circuit boards

I want to supply all my circuit boards with one lipo battery. The design is like this. I need a battery connector cable. So, I made my own battery Y-cable like this. I use XT-90 connector to ...
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1answer
108 views

Is it safe? Where to put the fuse?

I want to build connection like this. Is it safe? I want to put fuse in the circuit. Where should I put the fuses before or after converter? There is no any fuses in the system yet. I am using this ...
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2answers
78 views

IXDP 20N60B IGBT reversed biased conductive

I am using the IXDP 20N60B IGBT as an AC switch. This IGBT has no internal diode. When the Gate Emitter voltage is ~10V the device is on and conducts in the forward biased region as expected, shown ...
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0answers
32 views

*WARNING* The directory: 'home/xslib/xslib' does not exist

I am working in cadence in VMWare virtual machine. Everything is working fine but some graph are showing unexpected. Also I am getting the warning, WARNING The directory: 'home/xslib/xslib' does ...
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2answers
67 views

Design voltage-mode boost converter

I am trying to simulate boost converter using voltage-mode controller as the schematic below. However, the circuit doesn't work as expected. Output voltage is supposed to be equal to reference voltage ...
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1answer
706 views

Difference between power amplifier and voltage amplifier! [closed]

What are the major difference between power amplifier and voltage amplifier?
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1answer
158 views

14watt 6v solar panel feeding to a TP4056 based charger for charging a Li-ion battery

How to design a solar power based power supply for charging a Li-ion Battery of 3.7v 3500mAh, using TP4056 ? Specs about Tp4056 based charger using are it is programed for 1.2A current max, and 4.2v ...
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1answer
45 views

High power highpass filter

I'm using an audio amplifier to produce a 15-20 kHz, 6 watt sine wave output into a pure resistive load. There are some low-frequency components to this signal that I want to remove (mains frequency ...
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0answers
19 views

What is the best way to connect 6S lipo 22000mAh to step down converter?

Can I use below step down converters with the battery below? I will be using multiple step down converter to supply to other boards like (IntelUp_Squaredboard,motordriverboard).These are the links ...
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2answers
100 views

Laser Diodes to work it in high temperature

The power of laser diodes, made of GaAs, is limited by its power loss and the maximum operating temperature. Theoretically, the semiconductor material itself can be operated up to an intrinsic ...
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2answers
118 views

Measuring individual Voltage of the connected solar panel in series using I2C Protocol having GND in common as this get short circuited

I was stuck in a situation when i was measuring solar panels connected in series using I2C communication protocol. The common ground between the system makes the panel disconnected making a short loop....
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0answers
75 views

Regulating Input Voltage from Power Supply

Background I have designed a "pseudo battery pack" for testing in a high powered application (1800 to 2200 Watts) This pack has a 60V input from supply, then uses 2 lm5009a buck converters to create ...
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1answer
90 views

How to connect four different ground planes in the same PCB?

I am working on a project which uses the LTC4020 multi-chemistry battery charger from Linear Technology. The design includes a microcontroller ( NXP KL25Z) to provide additional outputs and ...
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0answers
45 views

Central tapped transformer equivalent circuit?

i am trying to do a 2-30Mhz combiner with central tapped transformer. Awr gives good result when i use XFMRTAP model. But it is a ideal model. How can i obtain a nonideal central tapped transformer ...
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0answers
30 views

Power source with buck converter, load and supercap

I have the following circuit created in MATLAB Simulink: I have a power source (Vfc,Rfc) on the left. Its operating point is set by using a buck converter (mosfet,diode,L,C1), which controls the ...
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1answer
47 views

Discharge of a coil powered by parallel transformers

I have the following circuit: I basically have 2 transformer, one is 230V-8V the other one has a ratio of 1:1, so 230V on the secondary. I'm rectifying the two signals with two full bridge ...
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0answers
78 views

Using 40w tubelight choke to light a 39 w tube

Can I use a 40w tubelight choke to power a 39w 3feet T5 tubelight? Will the excess wattage create any problem such as decreasing the life span or causing the tubelight to burn out?
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3answers
820 views

What is this electronic set up with a red light on top of it? [closed]

Anyone can tell me what this is ? Not sure if it exactly pertains here in the electronics forum but I think it does . What is this set up near my house and why is there a really bright red light on ...
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1answer
54 views

How to use 24V 100Ah battery to run 12V motors?

How can I run 12V motors with the current of 30A together with 24V 100Ah battery? Should I modified my circuit to change 24V to 12V and connect to motors? or Should I find a battery which can change ...
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1answer
45 views

Arduino reading double-din radio volume rotary dial knob [closed]

Hey all I bought a Chinese double din radio in order to modify it to my liking. The main reason why i went with this one is that it had a few buttons and turn knobs on the front and i wanted to use an ...
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1answer
37 views

Is it safe to plug the connection end of a capacitor?

I need to put a capacitor between my motor power supply and ground cables, and have covered the connection with resin for safety. Is it safe to do this? It's an aluminium electrolytic capacitor by ...
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2answers
86 views

Do I need the same capacity connector on neutral side as on the live side?

This is basic question but I will ask anyways. Our real case scenario is similar to the drawing below. Lets assume 100A is flowing into the circuit that means 100A enters the circuit, gets divided at ...
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1answer
79 views

How to design for electrical connection for a food dryer

I am on this project in building food dryer to dry 2 kg fish cracker maximum per use. Based on the calculation, I only need to use power of approximately 60 watt for the heating to achieve the energy ...
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0answers
30 views

What is the diffrents in below MOSFET circuit considering control circuit?

What is the different in below MOSFET circuit considering control circuit? What is the charge pump involving ? Is it required charge pump for the both the circuit?
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0answers
67 views

Sizing capacitor filter for 12-pulse rectifier with bridges in series

I've always used circuits where the load is directly in parallel with the capacitor but what happens when using this topology in order to have a 12-pulse rectifier with bridges in series? Should I ...
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1answer
59 views

Identifikation of components GTE PSA 18B

Trying to idenify a device inside a kid's toy car. It is a two pin part with ca. 19 * 10 * 30 mm dimensions. It is located within one wire of three leading to the two motors of the car. UnfortuSeems ...
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3answers
111 views

Protect a micro controller even on mistakenly connected

I am basically a computer engineer and having only basics in electronics and electrical field. I have also searched for the solution but it looks, it would be better if i ask it to experts here... ...
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0answers
33 views

How can a make a feedback control in 3 level flying capacitor multilevel inverter ?

please I need your help , i want to make a feedback control to a 3 level flying capacitor multilevel inverter , so I will get the same output for different inputs , my feedback will read the output ...
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2answers
130 views

How the does this circuit source 4-20mA?

In the circuit, how the mosfet flow the 4-20mA based on the resistor network?
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82 views

Average power concept

Why as a power engineer we are interested in average power instead of instantaneous power? This question was asked in a interview which requires BTech qualification. What will be a good way to answer ...
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0answers
50 views

What's wrong with this modified 12-pulse rectifier topology?

I added two capacitors downstream in order to absorb AC component from rectifier current. Both Subsystem blocks are meant to form "triangular" currents in order to have these currents at both HV ...
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2answers
90 views

Meaning of slip in induction motors

Everywhere I see slip explained it says that is the percentage difference between the speed, or frequency of the rotor and the magnetic field. However the only way I can imagine magnetic field and ...
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1answer
550 views

Why is Junction Temperature called so?

Why is the silicon die temperature inside a semiconductor device referred to as "Junction" Temperature ? Though this name may make sense for minority carrier devices where there is maximum power ...
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1answer
62 views

What is the meaning of this statement “If any diode has fully recovered before the V across it starts to swing, there is no reverse recovery current”?

Here is an excerpt from the book 'A-Z Switching power supplies' by Sanjay Maniktla. "To minimize EMI, ultrafast diodes should be selected on the basis of softer reverse recovery characteristics. For ...
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2answers
122 views

Can i replace 3 (parallel) capacitors 16v 1800uf with 16v 2200uf?

The motherboard model is G31T-M REV:1.0 . The circuit is for the 4-pin 12v power rail coming from the power supply. I'm replacing these because they are very bloated, It's quite a miracle that the ...
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4answers
293 views

Error in simulation of a DC/DC buck converter using LTspice

I am using LTspice to simulate a buck converter, but I am not getting the expected output voltage and I don't understand why. The specification is simple: I need to get an output voltage which is ...
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1answer
98 views

A question about servo motor direction control

Before asking the question I want to mention the basic two premises I know: As far as I understand for direction control, H-bridge inverter is used only for a certain type of DC motor not for an AC ...
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1answer
93 views

IGBT Rectifier Gate Voltage

I have a 3-phase bridge rectifier which uses IGBT's shown in the image below. The circuit works perfectly and the voltage on the output (unfiltered) is exactly as expected. However the gates are ...
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1answer
64 views

IR2133 Bridge driver not working as expected

I want to use the IR2133 to drive a mosfet rectifier. I have setup as in the circuit below The probelm is (take first high side fet as example) that the signal that appears on HO1 is exactly the same ...
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0answers
68 views

What's the best way to detect zero crossing in this design?

The design that I am talking about: I want to be able to detect the zero point with an MCU of which pin can withstand only 3.3 V. I'll forgo optocoupler because A. I want everything to be as cheap as ...
2
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1answer
373 views

Difference between Vth and Vge?

What is the difference between the threshold voltage (Vth) and gate-emitter voltage (Vge) for IGBT devices? How can I calculate Vth of an IGBT chip?
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2answers
107 views

What supplies power to the error amplifier in the LDO voltage regulator?

I'm trying to design my own low-dropout voltage regulator and am doing some preliminary research. Please forgive my novice question, but one thing that I'm having trouble finding answers for is, what ...
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0answers
63 views

Why is this voltage capacitor 'limited' to increase further more?

Simulation on PLECS of the following circuit. The main idea is to open/close both IGBTs with the same gate signal in order to track a reference (triangular shape) by charging and discharging the ...
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0answers
91 views

Determining Buck Converter's source voltage average value from current waveform

Dear all, Given that the above is the instantaneous source current drawn by a buck converter, may I know how I should go about determining the corresponding average value of the source voltage? Edit:...
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0answers
58 views

Add pulse to sinewave (high voltage)

I am looking to add a pulse to a sinewawave. The input is high voltage AC so I cant use an op-amp adder. I have also used tried to combine the signals through large resistors but that only averages ...
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1answer
37 views

Power consumption of a recirculating diode in a LED driver

I have a LED driver design that is supposed to put out 10A at 5.2V and uses the LM3409HV driver chip from TI. I've been going through the design and I'm confused about how the power consumption of the ...