‘Permanent magnet’ makes propulsion technology different
– An interview with Mr. Jonas Nyberg, Managing Director West, Berg Propulsion, and Dr. Jussi Puranen, Head of Product Line, Electric Machines, The Switch. By Zhao Bo, Journalist with China Ship Survey Although permanent magnet (PM) machines were invented more than 100 years ago, they haven’t been used in megawatt-class applications until the past few…

