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Hello, first post here, so I apologize if this is the wrong section, or if this has been resolved before (Google searches didn't lead me to any possible solutions, or I don't know the right key words) I was trying out some of the circuits from my old electronic project labs, the kind with the little spring terminals, such as this one "[url=htt
Have you studied the half-bridge topology? Where exactly are you stuck? Have you studied the various sections - oscillator, PWM, driver, MOSFET bridge, transformer, output rectification, feedback, etc?
Hi..I want the circuit diagram for designing 500W or 1kW inverter with transformer (12V to 220V). Thanks in advance..
Hi and peace to all I am designing a push pull sine wave inverter using center taped 12-0-12 to 230v transformer for now i have succeeded in generating 17khz pwm frequency modulated by 50hz i am using no feedback for now but will later add it because at this stage i am just concentrating on transformer and other aspects of this inverter. (...)
Hello everyone, you can use a simple 12v transformer,rectifier and 7812 regulator as sky 123 said or you used smps it all depends on your specifications.
Dear vampire_sir Hi I think your circuit is a flyback converter , and here are my statements : 1- the out put load shouldn't be high . a flyback converter with high loads , can be pretty dangerous . 2- you don't have any capacitor in out put ( and of course any diode ) 3- do you have current and voltage feedback ? ( fly back converter would
hello, I am trying to develop a digital feedback control for a 45-W half-bridge converter, microcontroller used is from microchip dspic33fj16gs502. PWMs provided to the mosfets are around 3Mhz and the power to microcontroller is self-supplied through auxiliary output of transformer. Currently i only have feedback signals of auxiliary (...)
Why not DC feedback? Using a current transformer as sensor would be the only serious reason against it, hardly to achieve for 0.1 Hz however.
It depends what you want to do! As transformers always have a LF roll-off, it is cute to use the NFB to increase the gain to maintain a flat frequency response. How ever the phase shifts within the transformer can with excessive B/W and gain result in oscillations. You get the same case at the HF end of the band. So proceed with caution and try to
The auxiliary winding of the transformer can be used for indirect feedback to control the isolated output, also provides demagnetization detection and powers the IC after start-up. This '750370059 transformer' of Wurth Electronics not suitable for your application, primary to secondary turn ratio 3:1:1, in order to obtain +/- 30V from 12V (...)
Hi. I designed a flyback converter with uc3844. for Rt = 6.8k and Ct = 2.2nF the oscillator frequency was around 100KHz. this is ok. and thus clock frequency at output pin6 was around 50KHz. that was ok too. this was all when tested with feedback connected to ground and no transformer was added in free running mode to just test it. the pulses at ou
hii, what would be the circuit and design parameters i need to consider if i have to design a feedback circuit using TL431 for a non isolated smps. Even though i am using a transformer. But the secondary and primary ground are common. 2. In a multiple output flyback smps, reflected voltage is secondary voltage multiplied by turns ratio.
Hi I have a doubt about the operation of a switching power supply and I would appreciate your feedback. Suppose that we have a transformer rated at 1A , we are using a full wave bridge and a capacitor and suppose that the rectified output is 12v DC. If I use a switching regulator (like LM2576 or LM2676 etc) but with an efficiency of 100% (
Most people who want tools are more concerned with things like transformer design, efficiency, ripple, etc... open loop parameters, basically. Most people don't think of stability as anything other than a yes/no question, so this program probably just spits out a foolproof stable feedback loop. Most people wouldn't be interested in bode plots or
How does the circuit in the picture? precisely when the switches Q1? Thanks 62492
I just want to use the smps transformer and design a new smps with same rating with discreet components as regular ch ina mobile charger with high rating components.
"Flyback" transformers don't generally have a feedback winding. transformers dedicated for flyback converter mainly have an air cap, reducing the main inductance to store more energy with a particular core flux. This is required by the flyback operation principle of storing the energy in one half cycle and releasing it in the other.
Regarding question 2 in your reply to betwixt: Since there is no overall negative feedback, the output impedance of the circuit is essentially ro of the output transistor, which will be very high compared to the impedance of a speaker. There are practical problems with the use of a transformer as shown. The DC collector current of the output sta
It's a very basic inverter circuit, not applying for any efficiency. Because the transformer is driven into partial saturation, the output frequency will be rather 40 than 60 Hz with a 6V transformer. Some load may have difficulties with it. The schematic says 220 ohm for the feedback resistors, so 2.2 or 10 is definitely too low. What
You didnt mention what type of inverter it is. Mean wether it is a transistor based one or mosfet based one?. Usually this problem is caused due to loose windings in the output transformer OR the feedback section which monitors the output OR the distorted waveform. Cheers