The current of anyone of three phases is less more than two others in the AC220V.
One of my friend, he got a special problem that he made a AC220V 3KW power supply, the normal situation is shown in the Fig a, when he do the test in May, whatever the load is resistor or capacitor, everything is ok, the main problem is in the Fig b, when he added the capacitor to test and then the current happened as anyone of three phases will less more to two other phases, it means that even change Ua, Ub, Uc are the same result, this was happened during these days, my friend thought that this problem could be comes from the city power, he asking a man whom retired from the power company to make sure that, the man said that it could be happen, but the power company may not do any change for you, from May to July the power company probably do some change for the power equipments of local area near the place of my friend, now my friend have to do something to conquer this problem, do anyone have any good ideas to solve this problem, thank you.
What he needs maybe is some kinds of current balance circuit, but how do design it?
One of my friend, he got a special problem that he made a AC220V 3KW power supply, the normal situation is shown in the Fig a, when he do the test in May, whatever the load is resistor or capacitor, everything is ok, the main problem is in the Fig b, when he added the capacitor to test and then the current happened as anyone of three phases will less more to two other phases, it means that even change Ua, Ub, Uc are the same result, this was happened during these days, my friend thought that this problem could be comes from the city power, he asking a man whom retired from the power company to make sure that, the man said that it could be happen, but the power company may not do any change for you, from May to July the power company probably do some change for the power equipments of local area near the place of my friend, now my friend have to do something to conquer this problem, do anyone have any good ideas to solve this problem, thank you.
What he needs maybe is some kinds of current balance circuit, but how do design it?