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77 Threads found on edaboard.com: Transformer Feedback
Freewheeling diodes are shorting the transformer output voltage, just an erroneous design. Think how a transformer works. It may me useful to connect Z-diode + rectifier combinations or bidirectional TVS diodes across the primary windings to limit overvoltage peaks created by the transformer leakage inductance. But it's breakdown voltage (...)
Heīs probably concerning to take control of output current limit. I presume itīs not too usual, once the value is damped for output capacitor. Furthermore, an instantaneous current limitation is already provided by shunt resistor at primary side of transformer.
Ideally, the average voltage on both sides of the storage inductor will be proportional to the secondary output voltage, obviously with less ripple on the right side of the inductor. In so far you are just asking about suitable filtering. In a real circuit, there will be a load dependent voltage drop at the transformer (mainly by leakage inducta
You could use 3 transformers, which each will give you a fully floating low AC out, so you can connect them to a earthed control circuit. You could use opto isolators with a series resistor and a reverse protection diode, this will be cheaper then the transformer solution BUT will need some sort of gain control to calibrate and balance their output
Hello, On page 9 of Dr Ray Ridley's book, Dr Ridley states that "transformer flux balancing" is a thing that one should be wary of in a full bridge converter. What does he mean by this? I mean, surely, if one has primary current sensing via a current sense transformer, then it isn't going to be a problem? Also, if one ensures that at the maxim
Hello i have made transformer based pure sine wave inverter by generating spwm from microcontroller. so i am trying to make this simple inverter to work as 'on grid' inverter. what changes are required. regards
Hello everyone! I am at prototype stage of making power supply like in title. The problem is my output is 10 times smaller than it was expected to be - i have 0,33 V instead of 3,3 V . I have no clue what could be wrong, circut on the board is ok, transformer also seems to be ok. Any suggestions will be checked instantly, thanks for any response
Hi its like boost converter, It will have a MOSFET or BJT a high voltage switching device inside it and that will be clocked in a high frequency like 52khz, the switch will be connected series with a transformer on your need... The output duty cycle will depend on the feedback voltage.. And most of it will have a option like OFF/ON.. Look some typ
When I turn on the bridge I get a square wave out, but its a bit jittery and the transformer crackles. Might be due to an unstable control loop, or if the inverter is operated without feedback, an unstable oscillator circuit. Less likely a problem with a power electronic component. The cause is magnetostriction.
Hi everyone, i need some document for Analog components (Op-amp,transformer and MOSFET) Placement guideline and Routing Guideline.if anybody have please share this post.what are factor i have to follow to reduce the EMI and EMC as well as Cross talk ??
If output depends only on transformer turns ratio, it means there are no feedback regulations in your simulation circuit. Primary wiring current ramps up until reaches comparator's (current sense) threshold causing mosfet transistor to turn off. Then voltage on the secondary wiring goes as high as turn ratio allows. Circuit is not controlled.
looking for a micro-controller based 230V/300W Solar Inverter design. 1, Solar panel : 12V 50W/100W 2, Battery : 12V/40AH 3, load type : inductive load 4, high frequency transformer design Hi Jestin one of the simplest approaches is DC link inverter with two stage and a feedback path ! Best Wis
can someone help me fine tune this circuit for feedback/error correction for sg3525 pushpulll configuration. i need to get the values of the resistor right. i dont want to use a transformer in between just want to sense the voltage directly. thanks
Regarding the design of the inverter, assuming that you're using a 50Hz transformer to step up, the stages are: PWM controller Power MOSFET driver stage Power MOSFET stage Output regulation / feedback stage Additional features - Battery low cut, overload protection, short-circuit protection, etc As for the PW
With the second scheme, you changed the flyback into a forward converter, not what you want, I guess. Twe too high output voltage in first case isn't a problem of transformer design, it means that the feedback circuit isn't working. Your schematic has a missing ground connection, but there may be other problems too. The TL431 circuit is rather u
Si8420 seems to be a digital isolator, it can't work for analog signals like voltage and current feedback. I have general doubt about overvoltage of the push-pull output stage. Depending on the transformer leakage inductance, it might be difficult to absorb it with a simple rc snubber.
Is the input to the inverter going to be from the solar panels directly? Or will the solar panels charge the battery, which will be the input to the inverter? For the inverter, you have 2 methods: 1) From the input DC bus, generate a 50Hz signal, drive Power MOSFETs, which will drive a 50Hz transformer. Use feedback to maintain constant output vol
Is it because people would just prefer to use a PWM controller IC instead, in its place? This chip does not replace the PWM controller, it replaces the feedback optocoupler only with the ability to use a small transformer in its place. Although it can also drive an optocoupler, presumably with improved characteristic
Hello guys, I am trying to design an IGBT based welding system and i have some questions : For current control, we need to a feedback and i know that usually Shunt resistor used for these systems. 1) would be better that we use hall effect instead of shunt resistor (at output) or not? 2) How about CT transformer? any suggestion would be h
I made this with the ferrite core of a tv flyback transformer and some high voltage magnet wire from a microwave oven transformer - not really an ideal gauge for his sort of thing but it is what is available for $0. Is there any source of free magnet wire of particularly long lengths and of a finer gauge that I should consider exploring? Perhaps w