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Thanks Bradtherad for your contribution in the thread.
The inherent LR filter load representing the motor will "convert" the SPWM into a pure sinodal electric signal.
the motor acts as a low pass filter. The inductance and resistance of the coils windings create a low pass RL filter. Further...
Thanks KvM and KlausST for your help.
In fact I don't know for which frequency the LUT is generated. The guy on github don't provide this info.
I need frequencies from 0 to 100Hz.
Do some one knows a practical VFD project in the web?
I'm sorry Klaus, I appologize for abusing your precious time!
The project on github is only one source code file for arduino uno , No hardware.
My questions are, I think, general and independent of that project:
1- How to scale a given lookup table (LUT) to get a constant VF?
2- If I change the...
Thanks Klaus, it's a bit more clear for me now. Can you give me a formula please?
As I said the motor is rated 230V RMS, 50Hz, and the DC = 400V.
In fact I've not done any practical test yet, I'm using simulation only. I've put an RC low pass filter to view the generated sine waves.
The...
Hi all,
I have successfully simulated this VFD driver:
https://github.com/carneeki/OpenVFD
How to add constant VF option please if the motor is rated 230V, 50Hz?
I know that I need to scale the values in the lookup table, but how?
Another question, if I change the PWM carrier frequency from...
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