Problem in PWM block
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Hey! i am trying to generate a PWM signal to control 3 phase inverter and I am getting the following errors
:
Error in port widths or dimensions. Output port 1 of 'autoproj/Sine Wave' is a [1x1] matrix.
Component: Simulink | Category: Block errorOpen
Error in port widths or dimensions. Input port 1 of 'autoproj/PWM Generator (2-Level)' is a one dimensional vector with 3 elements.
The image of my model is also attached. I need to generate a PWM signal to get a sinusoidal output.
Pls help!!
回答（1 个）
Sebastian Castro
2014-10-2
0 个投票
Hi Abhay,
The PWM Generator block you placed in configured by default for three-phase systems -- therefore, it expects a 3-element vector of duty signals.
If that is what you wanted, you can specify your phases in the Sine Wave block as [0 -120 120]*(pi/180) , which will make the dimensions of the sine wave correct.
If you wanted a single-phase inverter signal (i.e. with 2 switching pulses instead of 6), then you should double-click the PWM Generator block and change the Generator Type drop-down menu to the dimension you're looking for.
- Sebastian
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