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Recent content by electro13

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    [SOLVED] Designing a 2KW Pure Sine wave inverter

    Hi Im trying to design a 2 Kilowatt power inverter to be used for a solar system, I've designed and built a 150 watt modified sine wave inverter before, but i know a 2 KW is different. Can someone help direct me in the right direction, or place to look for designs and read more about it, or...
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    [SOLVED] IRS2453D H-Bridge Driver problem

    thanks man! connecting SD to ground solved the problem!
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    [SOLVED] IRS2453D H-Bridge Driver problem

    Hi all, I'm trying to invert 230V dc i have from a DC-DC converter to a modified sine wave, im using IRS2453D to drive the bridge, I need the output to be at 50Hz, so according to the equation they have in the datasheet page 13 I calculated the RT, with CT being 10 nF, the problem im having is...
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    [SOLVED] Power MoSFET Drain-Source Voltage

    it turned out, the MOSFET was burned out, I had it initially in reverse, so it was burned and when I put it the right way it wasnt working, and the transformer was saturating, so I changed the MOSFET and changed the frequency and it works now!! Thanks all for the help!!
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    [SOLVED] Power MoSFET Drain-Source Voltage

    I've tested the mosfet using a simple circuit, connecting the drain to 12V via a 1K resister, source to ground, and gate to PWM output of a 3525 chip via 22R, I applied a 20KHz PWM to the gate and I got VGS and VDS as shown below, I changed the mosfet and I got VDS shown in figure 3, then tried...
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    [SOLVED] Power MoSFET Drain-Source Voltage

    I've tried this, I can see the problem, the fet switchs on but never switchs off, how can I fixed this?
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    [SOLVED] Power MoSFET Drain-Source Voltage

    PWM 20 KHz, 50% duty cycle Transformer is a EC 28 (12V/230V) I dont know the inductance or L/R because I had to take out of an old PCB board the resister connecting the source to the shutdown pin is 1K ohms, the one connecting the source to ground is 1 ohm
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    [SOLVED] Power MoSFET Drain-Source Voltage

    I have attached part of the schematic, the two mosfets are connected to a centre tapped transformer, the gate is connected to a 3525 IC output https://obrazki.elektroda.pl/5632654600_1364241960.png
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    [SOLVED] Power MoSFET Drain-Source Voltage

    Im Measuring Vgs and Vds right, Vgs is normal! Ive tried using different PWM frequencies and different MOSFET but still got the same problem
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    [SOLVED] Power MoSFET Drain-Source Voltage

    Hi, Im Driving two power MOSFETs (stp36nf06) using a SG3525ANG with a gate resistor, when I measure the Gate-Source voltage using the oscilloscope I get a perfect PWM of a peak-peak of 12V, but when I tried to measure the Drain-Source voltage I got a flat DC line at 12V with small spikes at the...
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    Can a Y capacitor be used as a instead of a ceramic capacitor?

    Hi I'm trying to finish a project im working on, and im out of the normal 0.1 nF ceramic capacitors, I have Y2 0.1 nF capacitors, will these do the same job as the ceramic ones? I know its sounds a bit stupid, but I dont want to risk it! Thanks
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    push-pull transformer

    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...
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    Power MOSFET Problem

    im trying to connect the 2 nmos mosfets to a centre tapped transformer as part of the DC to DC push pull topology, i connected the drains to the transformer, the sources to ground and the gates to complementary PWMs shouldnt this work and give a higher voltage at the output of the transformer?
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    Power MOSFET Problem

    would the voltage out of the drain be enough for the transformer to boost the voltage?
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    Power MOSFET Problem

    yeah! I connected the drain to ground! now I connected it to vcc i got 5v out!! this means that the FET is working right? but if connect the PWM directly I dont get any output! so I need a gate driver?! I tried using a signal generator to get the PWM at 100KHz and 11V connected to the gate...
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