What is Converter: Definition and 255 Discussions

A torque converter is a type of fluid coupling that transfers rotating power from a prime mover, like an internal combustion engine, to a rotating driven load. In a vehicle with an automatic transmission, the torque converter connects the power source to the load. It is usually located between the engine's flexplate and the transmission. The equivalent location in a manual transmission would be the mechanical clutch.
The main characteristic of a torque converter is its ability to increase torque when the output rotational speed is so low that it allows the fluid coming off the curved vanes of the turbine to be deflected off the stator while it is locked against its one-way clutch, thus providing the equivalent of a reduction gear. This is a feature beyond that of the simple fluid coupling, which can match rotational speed but does not multiply torque, thus reduces power.

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  1. T

    Boost converter inductor discharging question

    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...
  2. Captain1024

    Buck-Boost Converter Problem

    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...
  3. O

    Boost converter in Simulink problem

    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...
  4. Captain1024

    SEPIC Converter Analysis: CCM Operation with VL1, VL2, IC1, and IC2 Expressions

    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
  5. Captain1024

    Efficiency of Buck-Boost Converter

    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...
  6. D

    Problem with a buck converter: my error, or the device's

    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...
  7. S

    Protection on Step up and Step Down Converter Module Bucks

    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"...
  8. B

    Buck Converter (Step Down) Help

    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...
  9. M

    HVDC - Current Source Converter - Minimum DC Power flow

    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...
  10. srinaath

    Understanding inductive kickback in boost converter

    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...
  11. P

    How to shut off Led on buck converter

    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...
  12. M

    Understanding matrix converter (Venturini's solution)

    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...
  13. D

    Break down nitrous oxide by automotive catalytic converter?

    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"...
  14. U

    Help with buck and boost converter

    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!
  15. D

    I to V Conversion w/ Photodiode & IV Converter

    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...
  16. N

    R-2R ladder D/A converter problem

    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?
  17. C

    Genie 2000 to Ortec's Maestro file converter - wanted

    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...
  18. OtherRealm

    5v to ≈70v dc-dc converter in the 1w range?

    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...
  19. Marcin H

    Roman Numeral Converter Program

    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...
  20. J

    Trying to understand rotary phase converter output....

    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...
  21. ToonBlue

    Voltage Gain of Booster Converter at 1kHz and 5kHz

    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...
  22. PhiowPhi

    Performance of DC converter between equal and opposing EMFs?

    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...
  23. ju.hu.

    Need Help: 2V DC to 2V AC conversion at 1 MHz

    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...
  24. F

    Why is External Grounding Necessary in DC/DC Converters?

    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...
  25. V

    Need Help Converting BCD to 2 out of 5 with 6 Inputs and 8 Outputs?

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

    Binary (BCD) to 2 out of 5 converter

    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
  27. G

    Why doesn't converter operate pump?

    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?
  28. P

    2-switch forward converter -- transformer reset question

    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...
  29. smruti

    Flyback Converter: Working & Construction

    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?
  30. D

    Why are there two different truth tables for BCD to Gray?

    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...
  31. xortan

    Ensuring Safe Grounding for AC/DC Converter in Pelican Case

    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...
  32. S

    How Does Catalysis Work in Catalytic Converters?

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

    LaTeX Mathcad 2001 to Latex converter?

    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?
  34. T

    How Does Mark-Space Ratio Affect Boost Converter Performance?

    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...
  35. H

    Control design for PWM converter

    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
  36. B

    Digital design code converter help

    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...
  37. Chacabucogod

    Why is my Transistor Reducing Voltage in Buck Converter Modeling?

    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...
  38. Chacabucogod

    Exploring the Topology of the Cuk Converter

    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.
  39. N

    Need 2A to get through a 5v/12v converter

    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...
  40. H

    How to get constant 12V from this step up converter

    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...
  41. J

    Designing a Boost Converter: Finding L for CCM Operation

    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...
  42. H

    Switched capacitive boost converter analysis

    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
  43. P

    Fuel Cells -catalyst converter

    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?
  44. A

    Understanding the Role of D1, C1, and Lm in a Boost-Flyback Converter

    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...
  45. N

    Non-Inverting Buck/Boost Converter Question

    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...
  46. latsany

    E/M converter of speed governor

    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
  47. Artlav

    Constant current boost converter problems

    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...
  48. G

    Binary-to-Gray code converter

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

    Dc dc dual converter USB powered

    Hi, I am looking for a compact (possibly a on-chip solution) high efficiency DC-DC dual converter powered by a USB 2 port. The aim is to supply a dual voltage to a logic circuit for driving audio signals from/through different channels, as in an audio switch I.e. MAX4910 or 4912. Any idea...
  50. N

    DCM Analysis of Cuk Converter: Finding M(D,k)

    Homework Statement Assuming that a CUK converter is operating in DCM mode (see attached image), find the solution for M(D,k). D is the duty ratio of the switch, and k... Homework Equations \frac{V}{V_g} = M(D,k) k = \frac{4L_1L_2}{(L_1+L_2)(2RT_s)} The Attempt at a Solution...
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