Converter Definition and 257 Threads

I don't understand this part. When the inductor is charging, the capacitor current should be decreasing because its supplying the load. When the inductor is discharging (after DT), the capacitor should be charging and hence the current should be increasing, but in the figure its decreasing, why...

I'm looking into the design of the control circuit for the mosfet. If I know the output voltage and input voltage then I can find the duty cycle required. I found this schematic that uses feedback Source https://www.maximintegrated.com/en/app-notes/index.mvp/id/2031 Why would I need feedback...

I'm reading up on boost converters and so far I understand that it basically uses the inductor as a source together with the actual supply voltage to boost the voltage. During the discharging period, why would the current (if allowed to) drop to zero ?, wouldn't the supply or battery still be...

Homework Statement Image Link Homework Equations Switching Frequency ##f_s=\frac{1}{T_s}## ##K=\frac{2L}{RT_s}##, ##K_{CR}=(D')^2## ##R=\frac{V_o^2}{P_L}## In CCM: ##D'=(1-D)##, ##D'=\frac{-DV_{IN}}{V_O}## In DCM: ##D_2=\sqrt{K}##, ##\frac{V_O}{V_{IN}}=\frac{-D_1D_2R}{2Lf_s}## The Attempt at...

Hi I am trying to simulate a boost converter in Simulink, but I have a problem. When I measure the inductor current it shows as a triangular waveform instead of an exponential waveform like I would expect, does anyone know why? Does simulink do some simplification I am not aware of...

Homework Statement Find expressions for VL1, VL2, IC1, IC2 for each of the two intervals of a SEPIC converter under CCM operation. link: http://i.imgur.com/EY98QbC.png Homework EquationsThe Attempt at a Solution link: http://i.imgur.com/SskXRoC.jpg?1

Homework Statement Consider a Buck-Boost converter. If in addition to the transistor on resistance (R_{ON}), the converter diode has a voltage drop (V_{D_0}), symbolically derive an expression for the efficiency, η of the converter, where η = 100* PO/PIN. Verify that that when R_{ON} and...

Hello everyone, I am in the process of designing a buck converter. This is the regulator I have chosen. http://www.aosmd.com/pdfs/datasheet/AOZ1242DI.pdf The input will be 13V output will be from 12 to 6 volts (will be adjusted via a thermistor on the FB voltage divider R2) Now, the issue...

In a circuit that I'm building, I have a power source of 5 volts DC that powers various components. A few of them are LED lights and light bulbs. -Background Info- In circuit 1, I have a step up buck "2A DC-DC boost step-up Conversion module MicroUSB 2-24V 3V to 5v-28V 12v 9v 24v"...

Homework Statement See attached sheet Problem with the buck converter circuit as in the diagram attached. The PWM is fed from a OP AMP in comparator mode, can we find the values of R1 and Vout. We have been supplied with the values of R2, the Duty Cycle of the waveform is 30%, and Vref which...

Hello, I was reading about the differences between Current Source Converters and Voltage source converters. One main difference was that Current source converters need to have a minimum DC power flow of 5-10% while VSC do not have a min flow requirement. It was also called a deadband. Why is...

please correct me if i am worng with the understading of inductive kickback,"voltage polarity across inductor will be such that it opposes the source voltage"... inductive kickback occurs when there is sudden change in current through the inductor... in that case inductor voltage will go very...

I am using a buck converter with a battery pack, for a usb charger. The issue is, is that the buck converter I have ( http://www.ebay.com/itm/DC-Converter-Step-Down-Buck-Module-7V-24V-to-5V-3A-5V-usb-output-power-adapt-/261030150117?hash=item3cc69bffe5:g:Q3UAAMXQTT9R0Qos ) has a led on it, which...

Hi, I'm actually trying to do some simulation on matrix converters for my university power electronics subject. I am reading through the different types of modulation techniques. One of them, the Venturini direct approach, with sinusoidal voltage output and input current. I'm having a little...

Can nitrous oxide be broken down for use as an oxidizer by passing through a matrix type automotive catalytic converter? If so, will the matrix need to be heated? Also, will the process create enough heat to combust gasoline, ethanol, kerosene, or LPG? I want to fabricate a "stand alone"...

Hi all, I'm new to power electronics, and somehow I still could not get the impact of switching frequency on voltage gain, output voltage ripple and inductor current. Additionally, how is the voltage gain affected when increasing load resistance? Thank you!

Hi all, I need to convert i to v using photodiode and iv converter, now the photodiode can give reverse light current upto micro amps and to convert it to volt i am using opamp with has max input bias current of about nano amps , now how can i convert this micro amps to nano amps because it...

Homework Statement Simplify in order to find voltage output. Homework Equations Vout= -Vref x (A + B/2 + C/4 + D/8) The Attempt at a Solution Firstly is this even correct? Secondly, I have 2 voltages (2.5V and 5V), what should I do now? what is my Vref?

Dear forum, first of all thanks in advance for your collaboration and interest. I am an engineer interested in nuclear physics. I was looking for the program SPEDAC-Pro which is used for the conversion of the Genie 2000 file format into the Ortec's Maestro ones. Unfortunately the program is no...

I am looking to find a 5v to ≈70v dc-dc converter in the 1w range or the equivalent transformer + diodes. This is for a bio stimulation device and I need a high voltage and low amperage. However, not having spent years researching and buying electrical components, I'm a little uncertain where...

Homework Statement Make a program that converts numbers into roman numerals. Use strings, looping, and branching. The code posted is what I have so far, but I have no idea how to continue this program. I'm not sure if what I have so far is right or will even work or if I can use it at all...

I am looking to build my own rotary phase converter for utilizing 3ph devices however I am having a difficult time wrapping my head around the aspect of producing 120* out of 180* power. PracticalMachinist forums have a plethora of threads on this topic but after reading many of them I find...

Homework Statement Does the voltage gain follows the a linear relationship when the switching frequency is 5 kHz? and does it still follow the linear relationship when it is 1k Hz? Homework EquationsThe Attempt at a Solution I am doing an experiment on this and I have found out that through...

A battery of constant voltage is in series to a conductor that is placed in a changing magnetic field over time, inducing an EMF with a polarity as indicated in the circuit as "Induced EMF(1)", both the battery and the induced EMF(1) are in series as the input voltage to the DC converter, the...

Hi at all, I need to convert a DC signal ranging from -2 V to +2V to a AC signal with an amplitude of approximately the same voltage at let's say 1 MHz. The frequency can vary but has be higher than 10 kHz. I looked for PSW inverters but didn't found any suitable. Our intention is to record a...

I have two identical DC systems fed from separate DC/DC isolating converters, one converter is fed from a negatively earthed DC supply and the second is fed from a floating DC supply. In both cases the negative of the DC/DC converter supply is tied externally to the 0V or 'common' of the output...

I badly needed help.. I needed a Binary to 2 out of 5 converter with 6 inputs .. it should have 8 outputs.. HELP! :(

please help.. I needed a Binary to 2 out of 5 converter with 6 inputs .. also I needed it to have 8 output with.. HELP

I connected my 12 volt 3 amp bilge pump to a 36 watt 3 amp 110v ac/12v dc power converter. The impeller blade vibrates but does not spin so it can pump. The pump operates ok when connected to a 12 volt 3 amp/hr battery. What's the problem?

Switching power converter question (FYI, this is a 2-switch forward with synchronous rectifiers on the secondary). Switching at 200kHz. The transformer stores & transfers energy during the on state (the "D" state), and then must be reset during the off state ("1-D" state). The primary...

we know that when we give dc supply to a transformer then transformer action doesn't takes place and the primary winding of a transformer gets burnt even when small dc is injected..but how the transformer used in flyback converter works in dc?? what about its construction?

Having a bit of trouble understanding why there are two different truth tables for BCD to Gray. Using ABCD as the BCD and WXYZ as the Gray, The way I learned it is: 1) MSB of BCD (A) = MSB of Gray (W) 2) A ⊕ B = X 3) B ⊕ C = Y 4) C ⊕ D = Z 5) Since BCD only ranges from 0 - 9, 10 - 15 become...

Hello everyone, So some background on what I am doing. We have a pelican case with a bunch of PCBs that require DC voltage. I have purchased these power supplies (http://www.meanwell.com/search/EPS-65/EPS-65-spec.pdf ) to do the AC to DC conversion. They are located inside the Pelican case as...

how exactly does catalysis in catalytic converter works? I mean, what is the molecular role of the metal catalysts that facilitate the reaction?

I am looking for a converter that takes a Mathcad 2001 file, with various formulas and mathematical expressions, and transform it into Latex code that can be posted on forums. Do you know such a translator?

Homework Statement I have recently learned about the boost SMPS and and have built a circuit to investigate the waveforms and levels for Vout, [L] and [C] for different mark space ratios. the circuit consists of a 95uH inducotr, diode, 47uF cap, 70 Ohm load, a FET who's gate is controlled...

Hi Everyone, here is Hubert again. Here attached is my design and the problems I am facing. Can anyone be of help? Thanks in advance. Best regards Urbain

Homework Statement design a code converter that converts a decimal digit from the 8 4 -2 -1 code to BCD. Homework EquationsThe Attempt at a Solution so i listed out the BCD order from 0 to 9 and listed the weighted 8 4 -2 -1 code so that the weights would equal to the BCD equivalent. 8 4 -2...

Hi I'm currently modeling a 5-12Vdc buck converter, and just out of nowhere decided to put a transistor between the output resistance and the diode. Now, this transistor is always connected to voltage so it shouldn't do anything at all, it's just a closed switch. What happens is that the...

Hi, I'm currently studying the topology of the cuk converter and I'm wondering why do you hhave to add that first inductor to the topology? Can't you just charge the capacitor straight through the voltage source? Thank you.

So I need 2A to get through a 5v/12v converter, so from what I understand I'll need around 5-6A, if I take a portable battery pack (the ones with multiple USB ports for charging devices like phones and such) and put a plug in 2 if them, then strip the other end of both the cables and connect...

Homework Statement I am working on solar charge controller for 12V battery..From solar panel 8 to 16V variable input goes to step up converter which will double available input voltage and then there would be some circuit which will make output of converter circuit constant at...

Homework Statement I have some very big difficulties with this assignment, hope someone can give me some clue in the right direction Design the boost converter represented in and operating in continuous conduction mode (CCM). The usual hypotheses apply: the output voltage is considered to...

Plz guide how I can solve below circuit i.e. its transient analysis..final expression for load voltage..it is actually mode 3 of my capacitor based boost converter ..in mode 3 T2 transistor on while T1 off..so output would be double..I need expression for instantenous

Homework Statement Do fuel cell vehicles have a catalytic converter? Where is it located? The attempt at a solution[/b] I am guessing that the the question qould be referring to precious metal catalyst located at anode region which breaks the fuel into protons and electrons?

I am reading about Boost-Flyback converter and this is a bit confusing. Could you explain the role of D1 and C1 here? The lecture says that "D1 and C1deliver to the output the energy stored in the transformer leakage inductance Ld." I can't understand what is meant here. And could you explain...

Function of the Circuit: • Provide a constant voltage of 3.7V at the load for battery charging when there is an input ranging from 0V to 5V. • When SW1 driven by PWM 1 and SW2 is always OFF, the device will work in Buck Mode. That is if input voltage goes above 3.7V. • When SW1 is always ON...

I can't model in algorithm the connection between servo valve and LVDT the feed back position in application please, help me how I do

Hi. I want to make a constant current driver for a Xenon arc lamp. It takes 12V as input, should give out 8A at 15 - 20V, and maintain 50V idle voltage. I used a TL494 to control it, single-ended output driving a boost converter. 100KHz frequency. Schematics attached below. It...

Homework Statement Binary-to-Gray code converter,isn't it a decoder? The Attempt at a Solution