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101 Threads found on Push Pull Inverter
Hi all, i am currently working on guitar tube preamp (a sort of pedal) which power doesn't exceed 10W. I would like to use push-pull topology for dc-dc converter, with 12V input voltage and 300V output voltage. At this moment I am trying to design transformer for such convertor. I have searched all Unitrode's application notes and searched all I
the inverter I use is push pull inverter, does increase the pmos and nmos's resistance?
Hi i am doing inverter push pull configuration i want to implement PID loop to control output volatge.I am confused to how calculate the P,I,D parameter for the inverter and also how is duty cycle is related to the output of push pull converter based inverter. Help (...)
I am making push pull type 50Hz inverter using PIC16F883 I configured uC in half bridge mode for 20 mSec. period 1) Signals I am getting on P1A & P1b is just complement of each other. Suppose for 30 % duty cycle without any deadtime what I am getting is some thing like this I CHECKED THIS (...)
hello everybody anyone can help me to find an academic study XXXXXXXXXXXX which study well,the inverters designs (topology) using in the LCD monitor (CCFL load of course): 1) Buck Royer inverter. 2) push pull inverter. 3) Half Bridge inverter. 4) Full Bridge inverter. (...)
Hi I have done many designs on H-bridge from opt-couplers and discrete logic to dedicated H-Bridge drivers. But Now I want to design a sine wave inverter using push pull transformer with center tape. actually one of my design based on atmega8 has a square wave out put now I want to change the software making an spwm signals driving the same (...)
My inverter cannot carry lcd tv(samsung).push pull using sg3524
Hi, Im designing a DC to DC converter using a push pull topology, I know I need a centre tapped ferrite core transformer connected to two power mosfets to get a higher output voltage! the problem is I cant find such a transformer on the market! is it ok if I use a flyback transformer instead? PS. I took out a EC28 Transformer form an o
thanks can you please share here the links of application notes and also a link of sg3525 application note. anyhow my progress of learning push pull topology going good.. Hi You're welcome ! but can you please have a bit search about the application note or datasheet in google ? Best Wishes Goldsmith
Sorry, but isn't it a rather complicated solution to build a simple 50Hz push-pull inverter using N-MOSFET! I wonder how my 'very' simple driver (2 NPN transistors and a few resistors) works without failure unless the user connects, by mistake, the mains powerline to the transformer output. To control the bases of the 2 transistors I used (...)
I think you should try to draw the layout by yourself, don't worry if you get wrong or's a procedure of learning! You sholud try to draw a simple circuit, such as a push-pull inverter and try to simulate the circuit from netlist file. Always to use DRC(design rule check) to make sure your layout is follewed by the design rules! (...)
thanks for replying. actually i mean POWER inverter of ratings:12v-230v , 500w. you should use push pull topology to make this...... you can examine any mcu controlled ups working with 12v battery... for example this ups uses pic mcu
hello all... need info on how much current/voltage is supplied by a typical magneto/source coil......... by a 110cc 4 stroke engine... i tried to make a power inverter (12V-300VDC) but no success..... its a push-pull topology using SG3525 and IRF44 as switching... pri winding is 4T+4T #20 AWG magnet wire/ secondary is 58T #20..... (...)
CMOS inverter is itself a simple push-pull Class B amplifier because PMOS pushes the load, whereas NMOS pulls the load. When you short-circuit the output to the input of an CMOS inverter, you are making a comparator. Instead of a short-circuit, replacing it with a resistor will create a (...)
hi all, i want to know how can the microcontroller is used to control an inverter.please give me any recommendations about this subject. regards, PIC16F72 is very much suitable for making an inverter It has to perform following tasks Genetare complementary pwm singnals ( push pull configuration) TO generat
Right, the moment there is a big resistor in parallel with an inverter, the resistor is acting as a DC short and ac open. Hence the inverter is forced to operate as a push-pull amplifier.
I want to build a dc-ac inverter with the following specs: 12v input 230v output 100W 2x IR2110 for the H-bridge mosfets 3846 for a half-bridge push-pull and a uC to control the PWM for the H-bridge. The output should be a pure sine wave. My questions: How does the IR2110 work.What kind of protections should i use. The basic (...)
I have design a CCFL inverter by following the DS3984. The only problem is the reliability of the FETs. It sometimes overheat or occasionally blow up. I have ensure the soldering is correct between the FET and the DS3984 but it stills occasionally blows up. I have emailed Maxim and they told me that the only way for the FETs to overheat and blowup
this would be a push-pull amplifier Hey, In the basis CMOS inverter ( having NMOS and PMOS ) what ll happen when both the transistors r in saturation and what ll be the output.. Will the circuit behaves as voltage divider in this case???.. Can u explain in detail.. Thanks in advance.
Q1 and Q2 form a push pull amplifier, biased with resistors - AB class, and driving the primary winding of the transformer. The circuit will oscillate because of the positive feedback from the secondary winding.The secondary winding is differentially coupled to the input of the amplifier, and because of the winding polarity ensures positive feedba
I uses just a push-pull inverter with a transformer, switched at around 2KHz.
hi, u can use a osc. circuit to drive a push-pull amplifier. Using a transformer to change DC to AC.
Output is connected to primary of the transformer.The circuit shown is only one leg actually full circuit is a push pull inverter which consists of same circut connected to other end of transformer. The last resistor is snubber its is in complete leave it. I want to know is when the 5th(left to right)transistor is turned on.If that (...)
It's surely no good idea to use a single inductor boost converter for this. Just consider that switching losses are roughly proportional to the switched power, which would be 70A*400V = 28kW. Also you need a switch transistor with 400 V capacity instead of 24 V for a transformer push-pull converter.
I am using PIC16F883 for my push pull inverter project I am using PWM module configured for Half bridge my inverter frequency is 50 Hz. fixed ( Period 20 mSec. ) so I set system frequency to 500 KHz internal oscillator any higher value is not possible 1) for Half bridge PWM Period should be 20 mSec.( 50 Hz ) OR it (...)
Hi It is mostly depend on the drive circuit most inverter use push-pull circuit and center taped transformer is the best solution All the best Bobi
One of my friend gave me an emergency light with 11 watt CFL (AS shown in the photo) which operates with an push pull inverter circuit powered with 6 volt 10 Ah battery. It has a peculiar problem which he coudnt solve. Initially the tube was blackened, and i replaced it. Within 10 minutes i lost the tube due to blackening at the ends. I (...)
a good sense efficiency for this inverter would be ~ 80%. that's about 520A at 12 current draw, and even more at lower voltages. it isn't practical for this power level to be supplied with 12V. most of the inverters which are >3000W are powered from 48V or more. of course, in special cases, can be powered from this voltage too. think about that th
Hi all, some time ago I bought a 12V to 220V true sine wave inverter, rated at 3500W. When it arrived, I hooked it up, did the basic checks, including load tests at up to 2000W. It created a lot of EMI, but otherwise all seemed fine, with an efficiency of 87% at 2000W, which is pretty good for an inverter with such a low input voltage. I left it r
Take a look at SG3525 PWM controller. Very easy to set up. Then use two MOSFETs in push-pull configuration. Step it up using ferrite transformer. Rectify the output. Then run it through a 50Hz H-bridge using another SG3525 and IR2110 or other such driver. Done! voila! an SMPS inverter. Too bad its not as easy as it seems. But you can master (...)
Just use 555 timer & 4017 to make a quasi sine wave generation to fireup two push pull transistor. Varying the 555 frequency, you can get the different frequency. taking the output from a different tapping of the transformer, you can have different outputs. Now you can approach in two ways. 1. First boost to regulated DC Link voltage. (Adjust
12v dc to 340v dc means boost converter. May I get help to make this? yes but more of the design using push pull converter for more efficiency than boost converter
I will need some time to study the Schematic of ur inverter, in the meanwhile what I can suggest is u put some comparator Opamps in the path of Error Amplifier pin of KA3525. I dont know much about 3525, but I have worked with 7500. but in my case, we stop the supply in auxiliary transformer which will stop further working of both push-pull (...)
In a short, the transistor's current gain and resistor dimensioning are defining the inverter input current and thus the maximum power. To increase it, the resistor values have to be reduced. But also the transistor and transformer rating must fit the intended power. Simple self oscillating inverters, as the present one have generally limited ef
i think he means a linear push pull 12v ...48v into 110\220v inverter......
Boosting from 12V to 300V by conventional Boost may lower your conversion efficiency as you will be using an 500V FET for Boost switch (getting lower RDs on in high voltage is costly & there is an practical limit), but in isolated pushpull you still can use low voltage FET such as 40V or 60V depending on your design, leakage, layout etc.
Just change the transformer to one with a 240V primary winding. Don't expect good results from this simple circuit though, it is not frequency or voltage stabilized and it has no overload protection. Brian. That and it also has no protection against battery deep discharge, so you may have a dead battery if you run i
Hello, I assume you want to make a true sine wave inverter. Such converters use a two-step approach. An isolated transformer is required to step up the low voltage DC to about 180VDC. This DC to 180VDC converter can be a H-bridge type as well. You need more mosfets, but the transformer design is easier. The second converter (that is fed from t
If, as FvM, says, it is a transformer with high leakage inductance (between prim and sec), it can be of use as you can use that as the current limiting means. However when this leakage inductance is between the two primary sides, it is a bad choice for your topology. Leakage inductance manifest itself like there is an inductance in series with yo
i m designing 500 VA sinewave inverter using pwm. my pwm frequency is 6 khz, i m using push pull configuration in power section i want to know whether same type of transformer (12-0-12/ 220V) is used for square wave inverter and sine wave inverter( PWM freq is 6 khz)? if different type of transformer is (...)
Hi all, I have read some very exciting stuff on this forum and i am hoping some of you electronics gurus can help me. I am building a pure sine wave inverter using a wien-bridge for my oscillator. Input voltage = 12v dc, Output voltage= between 30v and 60 v ac, output current not to exceed 2A. Frequency = 50hz. I have used a JFET in the negative f
Try suppressing the drain-voltage spikes with a simple RC network added to each drain. See details here: CCFL push-pull Snubber Circuit - Maxim
Hi, I am designing a Line interactive UPS transformer and am facing some problem w.r.t. the calculations required for designing. The specs for the transformer are as follows: Primary 1 : 225VAC @1A Primary 2 : center tapped 24-0-24 for push pull inverter @15A Secondary : 225VAC @ 1A Aux : 28VAC @5A Freq = 50Hz Can anyone please (...)
The diode are IN5407 yes it is IN5407\IN5406 You mean, it's correct to connect diodes across a push-pull transformer?
all I make a circuit with a converter push pull 12V to +150/-150V who works very well. after this, i make a half bridge inverter with sg3525 and optcouplers. ths circuit works good with linear loads
2. A push-pull amplifier will cancel even harmonics but not odd. Frank
That’s a Royer converter, this circuit is an auto-oscillating resonant using two transistors in push-pull configuration to provide a symmetrical more details read here:
level shift for the high side? you mean the firing ? Exactly. Unsuitable level shift can cause a trigger delay and possibly failure in turning one of the thyristors off. ---------- Post added at 14:27 ---------- Previous post was at 14:15 ---------- As far as I remember, the turn off
You should use MOSFETs even at 150W because of the increase in efficiency and decrease in losses over BJTs. Let's say you're making a 12V 150W inverter. So current should be 12.5A. But you have to consider the losses in the inverter. Let's assume the efficiency of the converter is 75%. Also, you have to remember that the battery voltage will be lo
@Goldsmith: If the requirement is to design a ferrite transformer needed for dc-dc push pull bridge converter having the spec (Vp=12v, Vs=320v, VA=500, f=60kHz), how can we chose the required ferrite core. Could you please show us the step by step process of it?