amplifying voltage

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

1. misou1989 Thread Starter New Member

Mar 19, 2013
10
0
hi,
how to amplify the 5 v sine voltage into a 500 V sine-wave voltage.
thanks

2. thatoneguy AAC Fanatic!

Feb 19, 2009
6,357
718
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?

3. misou1989 Thread Starter New Member

Mar 19, 2013
10
0
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
6,357
718
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
10
0
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
10
0
i don't have a good level at electronics this is all new for me

7. GopherT AAC Fanatic!

Nov 23, 2012
6,031
3,802
And you are asking for advice on a 500v inverter over the Internet?

8. misou1989 Thread Starter New Member

Mar 19, 2013
10
0
what's the problem with this ,i want to learn

9. thatoneguy AAC Fanatic!

Feb 19, 2009
6,357
718
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
10
0
the step up transformer works at only one frequence not 3

11. crutschow Expert

Mar 14, 2008
13,006
3,232
Transformers can work over a wide range of frequencies if properly designed.

12. misou1989 Thread Starter New Member

Mar 19, 2013
10
0
hello , can you please provide me with more details