most easiest way to generate two 3 phase voltage waveforms

Thread Starter

ak52

Joined Oct 15, 2014
197
Hello Everyone,
I have an requirement to make a test apparatus for a particular inverter.
Normally the control inputs to the inverter are coming from a 3phase stepdown transformer (230V to 5vrms)with respective current transducers attached.,so i have 3 phase signals(5.1vrms) and 3 current signals(1.5vrms) (total 6 signals) with a 30 degree phase shift between the respective voltage and current waveforms. Frequency is 50 Hz

I need to develop a circuit which generates these 6 signals and was wondering what is the best approach to do it.
This is what i have so far:

1. Use a microcontroller (ex PIC16F) with a DAC(MCP4822) and generate two Sine waves , one for the voltage and one for the current. Then add a phase shift circuit to generate the remaining two sine waves for each case.(simulation file attached)
2.Use a microcontroller (ex PIC16F) with two dedicated DDS chips(AD8934) and generate two Sine waves , one for the voltage and one for the current. Then add a phase shift circuit to generate the remaining two sine waves for each case.

If there is a better ,cheaper and easier way out there ,please let me know
 

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