how can i connect the output of park^-1 transform to a sinusoidal pwm developed for qzsi

we know that the output of inverse park transform will generate 0 and 1 signal. my question is that how to connect these output to sinsoidal pwm in matlab simulink. i have developed a simple boost pwm to generate 7 pulse signal for bidirectional quasi z-source inverter.so, can anyone provide solution for this.

Answer 1

[SANKALP DEV]

Hi Angelin,

I understand that you are trying to use the output of the inverse park transform to generate a 0 and 1 signal and then use it in the sinusoidal PWM in MATLAB Simulink.

The output of the inverse park transform in electrical systems typically results in continuous three-phase signals, representing the voltage or current in a three-phase system, rather than generating binary 0 and 1 signals.

The inverse Park transform is used in control systems to convert the ‘dq’ components (rotating frame) back to the ‘ABC’ components (stationary frame) in a three-phase system. The output of the inverse park transform is typically continuous Analog signals representing the ABC components.

To connect the output of the inverse park, transform to a sinusoidal PWM in MATLAB Simulink, you can follow these steps:

1. Add an ‘Inverse Park Transform’ block, connecting it to the output of the Park Transform block to convert ‘dq’ components back to ‘ABC’ components.
2. Use a ‘Sinewave block’ to generate a sinusoidal reference waveform, adjust its frequency and amplitude as needed.
3. Compare the output of the Inverse Park Transform block with the sinusoidal reference using a Comparator block.
4. Apply a logic threshold using Gain and Relational Operator blocks. Amplify the Comparator output with a Gain block, subtract a threshold value using a Sum block, and compare the result to zero with a Relational Operator block.
5. Drive a Pulse Generator block with the binary PWM signal from the logic threshold, configuring it to generate pulses based on the binary input.
6. Connect the output of the Pulse Generator block to your boost PWM block or the component that requires the PWM signal.

To know more about inverse transform block, please refer to the following MATLAB documentation.

https://www.mathworks.com/help/sps/ref/inverseparktransform.html?s_tid=srchtitle_site_search_1_%2522Inverse%20Park%20Transform%2522

Hope it helps.

[Muhammad Yasin Mohsin]

Thanks alor for briefly replying.

But, where or how the shoot through/ non-shoot through states of the QZSI are adjusted.