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SignWave Inverter moduleted Frequency Question?

qwaego manwo

I WANT TO KNOW THAT IN AN IRON CORE TRANSOFRMER INVERTER DESINE WHAT FREQUEENCY OF TRIANGULAR WAVE WILL BE MODULETED WITH THE 50HZ SIGN WAVE REFERENCE?

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  • 0 in reply to erik malund

    1) The inverter works similar to class D audio amplifier.
    2) Chose PWM frequency. There three aspects: a) PWM frequency must be at least 10-20 times higher than 50Hz. So 500-1000Hz minimum. b) Higher frequency - higher switching loses. c) At frequency less than 25kHz transformer can produce some noise.
    3) Efficiency 85-95%.
    4) Synthesis method: analog with triangle voltage - is obsolete. Use a microcontroller with PWM.

    Real C programmers do it by the book (ya!)

Reply
  • 0 in reply to erik malund

    1) The inverter works similar to class D audio amplifier.
    2) Chose PWM frequency. There three aspects: a) PWM frequency must be at least 10-20 times higher than 50Hz. So 500-1000Hz minimum. b) Higher frequency - higher switching loses. c) At frequency less than 25kHz transformer can produce some noise.
    3) Efficiency 85-95%.
    4) Synthesis method: analog with triangle voltage - is obsolete. Use a microcontroller with PWM.

    Real C programmers do it by the book (ya!)

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