April 7, 2025 /PRNewswire/ -- Raytheon, an RTX (NYSE: RTX) business, has awarded contracts to Nammo and Northrop Grumman for initial phase work on MK72 solid rocket motor development. "These ...

Abstract: Pole-changing is an alternative methodology to variable frequency drives for enabling two-speed operation in Permanent Magnet (PM) synchronous motors. However, existing dual-pole PM ...