| 摘要 |
A feedback control circuit and method for a control system used to contro l an electrical power generating source that comprises a free piston Stirlin g engine driving a linear alternator. A switching mode rectifier connects th e alternator winding to an output circuit that includes an electrical energy storage means and is controlled by a pulse width modulator that controls th e rectifier switching duty cycle and phase. The control system controls the pulse width modulator. The improvement computes a voltage across a virtual t uning capacitor and uses the computed voltage to control the switching mode rectifier so that the switching mode rectifier is switched in a manner that makes the alternator circuit operate as if a tuning capacitor were actually present and so that the control system controls the piston of the Stirling e ngine to maintain balance of the mechanical power generated by the Stirling engine and the electrical power absorbed from the engine by the alternator.
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