Patent ID: 8952635
Filing Date: 2015-02-10
Classification: H02K,H02P

Abstract:
1. A method for use in controlling a free piston Stirling machine driven by a linear motor having an armature winding to which a drive voltage is applied, the drive voltage being controlled by a digital data processing control system, the Stirling machine having a heat acceptor, a heat rejector and at least one periodically reciprocating piston, the method comprising (a) calibrating the control system by (b) repeating the calibrating step for a plurality of sensed collisions as the machine is operated over a transient range of heat acceptor temperatures and heat rejector temperatures and storing the sensed data sets to generate a relational database representing a three dimensional data map of associated data over an operating range of the Stirling machine; (c) driving the linear alternator in a useful work mode by