I was recently following up with a customer of a charging pile and learned that their system block diagram uses a three-phase three-wire system. I found in some material from ti that the system block diagram uses a three-phase four-wire system.
I have the following questions.
1、How do these two methods affect the charging pile system?
2、 is there any difference in application between the two wiring methods?
3、What is the difference between the control method of the fourth group of bridge arms and the control method of the other three groups of bridge arms?
I hope you can help me with the above questions. Thank you!