Dear Akram Elhelbawy,

the SVPWM is a modulation technique based on a space vector representation of the inverter voltage in a stationary frame (alpha-beta). The input vector of stator voltages given in alpha-beta frame is transleted into 3 pairs of gate signals, each one for inverter leg. I suppose that your intention is to convert the given inverter voltages into voltage components given in the rotating reference frame dq. To realize this task first of all you should calculate the given phase voltages (duty x Vdc/2), then for the calculated phase voltages use the Clark transphorm and in the next step use the Park transphorm.

In my opinion it is the simplest way.

Best regards,

Lukasz Niewiara

Dear Akram

please go through this below links, this links may be helpful for you

1. Article Voltage control by DQ frame technique of SVPWM ACDC converter

Thank you

Dear Akram,

Please see this below link, it may be helpful :

Article Novel space vector based current controllers for PWM-inverters

All the best,

You can do this by converting the gating signals (varying between 1 and 0) into pole voltages by simply multiplying the gating signals with 0.5*Vdc. Later, these pole voltage can be converted to line (for example: Vab = Vao-Vbo) and then to phase voltages (for example: Van = (Vab-Vca)/3, 'n' is the load neutral). Here, phase voltages of load must always be generated from line voltages because in 3-phase converters, it is the line voltage which forms phase voltage across load (neutral of load isolated).

Please see these below links, they may be helpful :

Article A novel vector control scheme for transistor PWM inverter-fe...

https://ieeexplore.ieee.org/abstract/document/163642

the reference voltages at the output of inverter can be sensed/measured using voltmeter and those can be transformed using parks transformation.

there are plenty of papers on SVPWM and transformation in IEEE explore, you can refer those papers