Only reason to do that would be if the motor voltage is higher than line voltage. Alot of gearless pm motors are in the 300-400v range and if your line voltage is too low, the dc bus won't be able to charge to a high enough voltage to be able to run the motor.

If your going to use a motor especially an induction motor that's the same as line voltage, there's no benefit. Your control transformers are going to kick it down to 120 or less anyhow for all of the controls. And I've never seen a door operator run on higher than 220/240. Most new operators are fine with lower voltage.