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Type: Posts; User: mathespbe

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    Closed: LC filter issues in inverter

    Hi power electronics experts,

    We have designed a solar inverter of 10KW capacity. We had 3 single phase inverter in which each phase carries 3500W capacity. We have loaded and tested the system...
  2. Closed: Re: Need circuit to isolate contrller ckt frm driver ic IR2110 or IR2336

    I guess your switching frequency is very high as far as inverter is concern. Just cross check that your IGBT can be used with this higer frequency. I am suggesting you the optocoupler VO3120 opto...
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    Closed: Re: Solar inverter driver issue

    My swithing frequency for high side is 18KHz. For low side 50Hz square wave. IGBT is getting shorted at the moment of supply and gate signal is available. No ringings or spikes present in my input...
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    Closed: Re: Solar inverter driver issue

    I guess my issue might be as follows.

    There may be some rise time and fall time in the IR2110 which doesn't match with the sequence of the opposite IGBTs. It wasn't detected when i check the...
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    Closed: Re: Solar inverter driver issue

    hi,
    my igbts are upto my rating. its 650v/40amps rated.
    i checked the driver output waveforms at the gate without power supply to the igbt. it was in the specified sequence as i am expecting. it...
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    Closed: Re: Solar inverter driver issue

    I am using the same 315V DC to my SMPS which outputs 3.3v and 24v supplies. It runs with out any issues. It's just a full wave rectifier with 4700uF/450v filter caps. And also a capacitor bank...
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    Closed: Solar inverter driver issue

    Hi experts...
    Warm regards to u all...

    I have designed a solar inverter with IR2110 driver. I have attached the schematic for one section of high side. When i check the pulses across the gate and...
  8. [SOLVED]Closed: Re: 3.3V regulator circuit with minimum ripples on load

    30uV is no load ripple. on Load regulation it was mentioned 200mV...

    - - - Updated - - -

    Thank you for your info godfreyl. And sorry I was mistakenly took dropout voltage as noise voltage. ...
  9. [SOLVED]Closed: Re: 3.3V regulator circuit with minimum ripples on load

    Thanks for your reply.
    It seems good while the noise is around 200mV. But I need some more noiseless. I expect the output noise in the range of 100mV or less. Is there any other options available?
  10. [SOLVED]Closed: 3.3V regulator circuit with minimum ripples on load

    Hi all...

    I need a regulator circuit that should give ripple as minimum as possible on load.
    I'm currently having a RPS which gives 600mV peak to peak ripples as i monitored on scope.
    It...
  11. Closed: Re: I2C Start condition code for PIC 16f877a and XMEGA128A1

    Check the data sheet page no 82 to 111

    for code example refer http://www.8051projects.net/i2c-twi-tutorial/pic-i2c-code-example.php
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    [51]Closed: Re: the IC to program my IC

    CP2102 can be used for your need since it's just a USB to serial converter bridge.
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    [PIC]Closed: Re: RFID interfacing with pic

    If you use separate SPI there won't be any problem. Try it and if you find any issue then update...
  14. Closed: Re: sample code for 20*4 character lcd using embedded c

    check the LCD datasheet for all the commands. or post the datasheet along with your full code.
  15. Closed: Re: sample code for 20*4 character lcd using embedded c

    use the delay as below...


    LCD_EN=1;
    LCD_Busy();
    LCD_EN=0;
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    Closed: Re: LCD shift right and shift left bugs.

    Put this command on the init section....



    lcdCommand(0x18);
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    Closed: Re: how to solve the following equation

    Z= [A+EF+!BC+D][A+!D!E+!BC+!D!E]
    if A = 0 ==> Z= [EF+!BC+D][!D!E+!BC+!D!E]
    take !BC as common term,
    Z = !BC[(EF+1+D)(!D!E+1+!D!E)]
    since 1+A = A,
    Z = !BC[(EF+D)(!D!E+!D!E)]
    since A+A = A
    Z =...
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    Closed: Re: how to solve the following equation

    There are no bold characters in your expression...
  19. Closed: Re: multiple SIM300 modems with single micro controller

    You can use modems which can connect through SPI or I2C. Explain your exact need. So that some solution can be found...
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    [ARM]Closed: Re: DS2782 Capacity issue

    look at page no 12 on your datasheet...

    http://datasheets.maximintegrated.com/en/ds/DS2782.pdf
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    Closed: Re: AT+CHLD giving only error

    Tele service 11 is used only for telephony purpose....
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    [ARM]Closed: Re: Re : Keil tool set error.

    You need supporting pakages to use a compiler to program any uC device...
    you can install the pakages by download it...
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    Closed: Re: soldering mistakes in pic16f877a

    pull up is just to make any voltage level more than 0.7 range into Vcc...
    It's just a transistor pulling up...
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    Closed: Re: soldering mistakes in pic16f877a

    1. Yes you need to connect those 2 Vdd and Vss
    2. To check the osscillator the only way is CRO. Simply write a code to toggle a pin. If it works the OSC is working fine...
    3. You may need external...
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    Closed: Re: How to read mp3 file via uart on avr?

    http://www.multiweb.cz/twoinches/mp3inside.htm

    this link can be helpful to study the format of an mp3 file...

    After that use file handling concept and read the file Rxed and write it into a...
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