Why don't I have a dc 12V without a brush motor and I can connect to a third phase 12V?
If the voltage is completely same can use frequency converter to drive the brushless dc motor, brushless dc machine is three windings of the synchronous motor, they are ultimately form a rotating magnetic field, is just the difference between the open loop and closed loop.
A magnetic field that is the same as a synchronous motor is also a rotating field. It's just going to go from 120 degrees to 180 degrees, and the motors are going to work, and they're not much less efficient. (only the brushless dc motor and some series of excited motor can connect the ac power)
In fact, there is no brushless dc motor, which transcends the ac frequency conversion speed, which is due to the increase of iron core loss due to the pulse vibration of ac power.
It's just going to go from 120 degrees to 180 degrees, and it's wrong, it's going to go from 120 degrees to 90 degrees.
