PWM frequency for L90 valve
Hello sir,
I am working with a Parker L 90 valve. The recommended PWM frequency is 100 to 125 hz. I wanted to understand the reason behind.Does this has anything to do with the Resistance/inductance of the coil ? Like the rise time of current in coil ?
If I run the coil with high PWM frequency say 2000 hz , will the current ever reach to maximum (I = V/R) ?
Is the recommendation of 100 hz only for avoiding switching losses or it has to do with performance as well .
Thanks
Sathish.R
Hello.
In other systems you can maybe set the PWM frequency and dither frequency separately.
You would add a small oscillation (the dither) on top of the PWM to avoid stiction and hysteresis.
In an IQAN system the PWM frequency is low enough that it creates an oscillation by itself, thus the PWM frequency is also the dither frequency.
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