May I ask another question about our water pump drive (its for a Dutch tulip field irrigation system)?
The PDF below again shows the block diagram of our setup.
....it goes like this....VIN...Variable output buckboost SMPS....Inverter.....BLDC.
The point is that our DC link capacitor is only 300uF, and we have no room for more capacitance than this.
The problem is(?), that the resonant period of the DC link capacitor, and the motor coil inductance is just 814us....and this is less than than the inverter commutation period of 2.5ms.........
therefore, do you believe that we will suffer overly high resonant currents in our BLDC motor coils?
When the Inverter's BLDC is permanently on 100% duty cycle like in our system, then shouldn't the DC Link capacitor be big enough such that the motor coil commutation period is much less than the resonant period of the DC link capacitor and the motor coil inductance?