In a single phase AC system, it would make sense to disconnect the load at a zero current crossing (and to activate it at a zero voltage crossing).
What about in a three phase system? If one phase is at zero, the other two are not. Is one phase just selected to spare the switching element for that phase?)
Are all phases switched simultaneously?
If zero crossing switching is indeed useful for three phase fixed frequency systems, is it also useful for three phase variable frequency systems?
What about in a three phase system? If one phase is at zero, the other two are not. Is one phase just selected to spare the switching element for that phase?)
Are all phases switched simultaneously?
If zero crossing switching is indeed useful for three phase fixed frequency systems, is it also useful for three phase variable frequency systems?