amplifying voltage

Discussion in 'General Electronics Chat' started by misou1989, Mar 20, 2013.

  1. misou1989

    Thread Starter New Member

    Mar 19, 2013
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    hi,
    how to amplify the 5 v sine voltage into a 500 V sine-wave voltage.
    thanks
     
  2. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    What is the required input and output impedance and current?

    How many stages do you need?

    What is the tolerable distortion?

    What frequency range for the sine wave?

    What are your power supplies?

    These are required parameters to answer your question properly. What is your skill level with electronics?
     
  3. misou1989

    Thread Starter New Member

    Mar 19, 2013
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    in fact here is my problem ,i have to control the inverter by a signal componed of different frequencies 5hz,10hz,15hz for exemple:
    control signal=cos*pi*f1*t+cos*pi*f2*t+cos*pi*f3*t and we have as an entrance of the inverter 200v continuous ,how can be the configuration of the inverter so it can amplify this control signal from +/-5v to +/-200 v
     
  4. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    Usually, control as you are referring to is done with MOSFET switches, creating a PWM signal, rather than amplifying the signal itself.

    It appears you are feeding a Fourier transform type signal?

    If that is coded to PWM using a comparator and a signal generator with your original signal, the output of the comparator will be the PWM needed to switch a MOSFET system to re-create the wave. Then send the PWM output through a low pass filter and you have a reproduction of the original signal. Accuracy depends on quality of filter and base frequency of PWM signal.
     
  5. misou1989

    Thread Starter New Member

    Mar 19, 2013
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    the pwm can be generated with matlab,the problem is how to use this control signal and have as an output of the inverter the same signal as the control signal just amplified ( the control signal is just an example to make it clear not necessarily a fourrier decomposition)
     
  6. misou1989

    Thread Starter New Member

    Mar 19, 2013
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    i don't have a good level at electronics this is all new for me
     
  7. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    And you are asking for advice on a 500v inverter over the Internet?
     
  8. misou1989

    Thread Starter New Member

    Mar 19, 2013
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    what's the problem with this ,i want to learn
     
  9. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    How much current do you need at 500V?

    Is 500V peak-peak or RMS?

    What do you have for a DC power source?

    The concept is to create the signal at lower voltage and high current, then go through a step up transformer.
     
  10. misou1989

    Thread Starter New Member

    Mar 19, 2013
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    the step up transformer works at only one frequence not 3
     
  11. crutschow

    Expert

    Mar 14, 2008
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    Transformers can work over a wide range of frequencies if properly designed.
     
  12. misou1989

    Thread Starter New Member

    Mar 19, 2013
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    hello , can you please provide me with more details
     
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