Is there such thing as a BLDC and its inverter being fed by a current source?

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treez

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Is there such a thing as an inverter fed BLDC motor being supplied by a current source? That current source taking the the form of eg a Current output regulated buckboost converter?
Why would this be done?
How do you calculate the RHPZ frequency for the buckboost given that the load is a BLDC inverter drive and the BLDC itself?

RHPZ of CCM Buckboost = (D'^2*R)/(D * L)
 
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