This can be a tough one as some of these VFD's don't support a Braking Resistor,( Just some electronic parts missing ) I have never used one on these Huanyang Drives, some have though with good success, most VFD manufacturers have them already sized for each VFD size,these are for a normal 50/60Hz AC motor, yours is not a normal AC motor, and with not all the spec's available for your spindle, it can be hard to calculate for the correct size, so most that are using them are kind of guessing, I have attached a PDF that give information on how to calculate the Resistor size, but you may not have enough spindle motor spec's, to get it totally correct, I will see what else I can find as this comes up from time to time