Patent ID: 7453241
Filing Date: 2008-11-18
Classification: F02D,F02G,F02M,H02P

Abstract:
1. An electrical power generating source comprising a free piston Stirling engine, including a power piston, driving a linear alternator, the alternator having an alternator winding, the power source comprising: (a) a switching mode rectifier connecting the alternator winding to an electrical energy storage means and including a pulse width modulator for controlling the rectifier switching duty cycle; (b) a negative feedback control loop for controlling alternator current and having a command input connected to a summing junction and an output connected to the pulse width modulator for controlling the operational duty cycle of the switching mode rectifier, the current control loop having a feedback circuit comprising a current sensor connected to the alternator winding for sensing instantaneous alternator current and applying a current feedback signal to the summing junction of the current feedback control loop; and (c) a negative feedback control loop for controlling a voltage, V