DC supply for three-phase Induction motor

Thread Starter

Nguyen Tuan 1

Joined Dec 18, 2017
Hello everyone, I'm new to this forum so if my post is not related, please forgive me.

I'm building simulation model of 50HP, 460V AC Induction motor powered by a DC supply. How can I find the required Vdc needed to operate the AC motor?

Thank you for your help.


Joined Nov 4, 2013
460 x 1.414 = 650 VDC.

I'm assuming you are building a custom Variable Frequency Drive given putting DC power to a 3 phase AC motor will just make a lot of smoke.


Joined Jul 18, 2013
You also need a very large capacitor bank for a 50HP motor!
In the case of a VFD, the DC can be quite a degree higher than the rated motor voltage as the mean level of the AC and frequency produced is set to a desired level by the power electronics.