Patent ID: 7200994
Filing Date: 2007-04-10
Classification: F02G,H02P

Abstract:
1. A control system for a free piston Stirling engine said free piston Stirling engine having a power piston, said control system comprising: an electromagnetic transducer in mechanical communication with the power piston, the electromagnetic transducer having an electrical port through which power is communicated; a piston position sensor connectable to the power piston and having a piston position output signal; and a controllable oscillatory power system having a bi-directional power port in electrical communication with the port of the electromagnetic transducer, and having an input control port receiving the piston position output signal, the system constructed and arranged to enforce a prescribed amplitude and prescribed frequency of the voltage at the electromagnetic transducer electrical port without constraining a current though the port so as to produce a desired reaction force on the power piston.