or analog devices configured to achieve the same or similar results as a processor based controller executing software or firmware based instructions power supply 88 is electrically coupled to both controller 86 and to magnetic elements 72 power supply 88 is configured to selectively supply electrical power to one or more individual magnetic elements 72 and or one or more groups of magnetic elements 72 under the direction of controller 86 i e to selectively supply or not supply electrical power to any one or more magnetic elements 72 under the direction of controller 86 in some embodiments power may be likewise supplied to one or more magnetic elements in addition to or in place of magnetic elements 72 e g via a built in rotor alternator and or generator controller and vibration sensor in some embodiments magnetic elements 72 and 76 may also or alternatively be configured to generate electrical power upon the rotation of rotor component 78 in one form magnetic elements 72 and 76 are configured to form a permanent magnet alternator in other embodiments magnetic elements 72 and 76 may be configured to form one or more other types of alternators and or generators in embodiments where magnetic elements 72 and 76 are configured to generate electrical power power supply 88 may include one or more power conditioning devices for conditioning the power received via magnetic elements 72 and or magnetic elements 76 for use by another engine 20 components or non engine.