Hi,

Hope this post find you well.

My intention is to make an 3-phase power calibrator !


Similar to this link, https://us.flukecal.com/products/ele...wer-calibrator


My current AMP design might be class AB type.



I am not worried to much about PWM generation ruther I am thinking how can I move class AB to Class D amplification.

A lot of the design effort relates to maintaining linearity and avoiding crossover distortion.

2 amplifiers( current, voltage) output will feed to CT and PT! Lets consider load will be connected in their output!



REQUIRMENTS :



1. The amp input should be plus and minus 7volt AC, 45-65Hz( 1 Hz has been converted to 1024)

2. Amp operating voltage should be more or less 24v.

3. 2 channel signal (not sure PWM) should be use , one for current, one for voltage.

4.Can run current transformer(input 16.5 V/1.5 A) and potential Transformer (input15v/2A). PT output may be 15VAC.

5. If possible both voltage and current amplification is required in one IC.

6. Both positive and negative half signal should be amplify.

 

I do not know what is the function of the calibrator thing.
An audio amplifier (your 45Hz to 65Hz) has a power rating depending on its power supply voltage and its load impedance.
An audio amplifier has a maximum allowed output current depending on its power supply voltage and load impedance.

You said the PT input is 15V and its output is also 15V then the PT (potential transformer) is not needed.

 

Thank you sir!
Thats the reason my previous design has both current and voltage AMP circuit in AB mode!
Current transformer has also primary voltage in the same time PT has .
In calibration system, what we need is to measure voltage and current in particular phase, angle amplitude and power quality.

For school going boyes can make similar device here....

 

I don't have a 3-phase electrical feed to my home and I do not know anybody who would need or use the thing you are tying to make.
The circuit you are trying to copy does not use any amplifiers.

 

I don't have a 3-phase electrical feed to my home and I do not know anybody who would need or use the thing you are tying to make.
The circuit you are trying to copy does not use any amplifiers.

Wanna read an old one? see the accahed
https://www.magtrol.com › wp-content › uploads › 5300manual

 

The block diagram you posted has no power amplifiers, instead they are little opamps.

 

The block diagram you posted has no power amplifiers, instead they are little opamps.

Yeap...I have posted to give you an idea.
Kindly read 5300 manual if you have time.