Abstract: A magnetic core is assembled from a plurality of electrical-steel laminations staked together by respective plug and socket portions of respective adjacent interlocks at locations that experience relatively-low magnetic flux density rate. An electrically-insulating-coating is placed on abutting lamination surfaces either before or after blanking the laminations, or after partially piercing the interlocks, prior to stacking and pressing the laminations together to form the magnetic core. The magnetic core is annealed in a non-oxidizing environment at a first temperature for a first period of time, and then cooled to a second temperature at a controlled rate of cooling. The first temperature is sufficiently high to prospectively cause fusion between adjacent laminations if not protected by the electrically-insulating-coating.

Abstract: A planetary engine includes a charge compression system for compressing a charge of air and/or an air and fuel mixture that is precompressed by rotation of the rotors and supplied into a combustion chamber through a rotary valve that may be actively adjusted during operation of the engine to vary the intake valve opening size and/or timing. Exhaust valves may likewise be actively adjustable rotary valves for further engine control. A compression insert mounted between the end wall assemblies absorbs combustion forces and provides rigidity to the engine, as well as occupies all or nearly all of the volume between the rotors at the minimum volume of the combustion chamber to improve the compression ratio of the engine.

Abstract: A planetary engine includes a charge compression system for compressing a charge of air and/or an air and fuel mixture that is precompressed by rotation of the rotors and supplied into a combustion chamber through a rotary valve that may be actively adjusted during operation of the engine to vary the intake valve opening size and/or timing. Exhaust valves may likewise be actively adjustable rotary valves for further engine control. A compression insert mounted between the end wall assemblies absorbs combustion forces and provides rigidity to the engine, as well as occupies all or nearly all of the volume between the rotors at the minimum volume of the combustion chamber to improve the compression ratio of the engine.