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Recent content by ultrasonic

  1. U

    Shielding effectiveness of an enclosure in CST

    Hello, I just started to use CST. I would like to calculate and draw SE(Shielding Effectiveness) in middle of the rectangular enclosure as first step to understand how to do things inside CST. I follow the basic analytical model of Robinson and draw it in Matlab as well. However, I could not...
  2. U

    FDTD 2D Plane wave source in Matlab

    Hello, I have just started to learn about FDTD and electromagnetic simulation using this method. I have Sullivan's book about FDTD; but the code inside is not practical to run. it seems that there is a need to modify it. In order to write the codes in Visual C, I want to run in Matlab (it is...
  3. U

    Convert the square wave of output of H-bridge based on IR2110 to sinus wave

    So I need to add a series inductance to the transducer. How can I determine its value? Do I have to add a capacitor, too?
  4. U

    Convert the square wave of output of H-bridge based on IR2110 to sinus wave

    Dear ALERLINKS, Actually my problem is I couldnt get enough cavitation in ultrasonic machine. So I suspect from my driver circuit that produces square wave with H-bridge PWM. But when I looked the link you shared, high voltage square wave is used to drive ultrasonic transducer. I think the...
  5. U

    Convert the square wave of output of H-bridge based on IR2110 to sinus wave

    Dear friends, I've nearly finished my ultrasonic cleaner project. I've tried to drive 60W transducer with square wave from H-bridge based on IR2110 and PWM, but I think sinus wave will be much more efficient for this operation. So how can I convert my square wave to sinus wave with a basic...
  6. U

    Adding AC current limiter to H-bridge power circuit

    Dear Goldsmith, Thanks for your helpful reply. it will be very helpful if you can share a schematic. Actually there is one point that I couldnt understand. We will add a small resistor to our DC supply. My dc supply is 300Vdc from 220Vac bridge rectifier. ıt feeds my H-bridge and I want to...
  7. U

    PWM IR2110 Half-Bridge duty cycle

    dear ALERTLINKS, you are right on but if we connect a load to the output of H-bridge, for this time all current will not pass through Rsense resistor, so on the operaiton we couldnt catch output power information correctly...
  8. U

    IR2110 High side floating supply offset voltage

    thanks for reply. I will look for it in my town.
  9. U

    IR2110 High side floating supply offset voltage

    so what can I do for amplftying output voltage? Briefly, I have 300Vpp signal at the output of H-bridge based on IR2110 and IGBTs. I want to get 450V-500V signal. I dont prefer to add a step-up transformer to the output, because I dont know anything of it, and also nobody around me to design it...
  10. U

    IR2110 High side floating supply offset voltage

    Hello, I am using this chip for driving IGBT's. It's datasheet, High side floating supply offset voltage is 500V max. Is it possible to feed IGT's with 700Vdc, or not? I couldnt understand the effect of IGBT's supply voltage on this chip. Thanks.
  11. U

    Help me establish power and output voltage of a toroidal transformer

    hello, I have a toroidal transformer, is it posibble to get its power and output voltage information? **broken link removed**
  12. U

    Adding AC current limiter to H-bridge power circuit

    hello, I have designed a H-bridge circuit and it gives 300Vpeak_to_peak AC signal on the output. here is the schematic: **broken link removed** I want to drive an ultrasonic transducer by using this driver circuit. I have a quesiton for this operation.How can I limit my output current? I am...
  13. U

    PWM IR2110 Half-Bridge duty cycle

    Dear ALERTLINKS, I consider about driving transducer. I want to drive 60W transducer. And for this operation, I want to use 70W-80W transformator. But how can I be sure that my transducer will not take upper 60W power. Some frequency such as resonance frequency, transducer may take maximum...
  14. U

    Step-up Transformer for High Frequency

    Yes, you are right. I wanted to say 300Vac peak to peak. Maybe I can use EI-33 transformer which can be found in computer power supply. ---------- Post added at 00:37 ---------- Previous post was at 00:33 ---------- Dear goldsmith, thanks for equations and calculations.
  15. U

    Step-up Transformer for High Frequency

    abdoalghareeb what is it.............................. ?
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