Patent ID: 6838781

Claim:
A control system for a cogeneration unit, the cogeneration unit including a heat engine and an alternator driven by the heat engine, the alternator generating AC electricity for an electrical load, the control system including: a. parameter sensing means for sensing: i. designated parameter(s) of the generated AC electricity; and ii. the temperature of a body heated by energy provided by the cogeneration unit; the parameter sensing means providing a sensed parameter value for each sensed parameter; b. for each sensed parameter, a comparator means for comparing a sensed parameter value with a respective desired value, each comparator means being able to provide an error signal according to the difference between the sensed parameter value and the desired value; and c. each comparator means being coupled to a respective controlling means, each controlling means being capable of using the error signal from the comparator means to provide a control signal, such that each control signal can used to regulate a respective parameter; wherein the regulation of the designated parameters is performed by controlling characteristics of the alternator, and the regulation of the temperature of the body is performed by controlling fuel supply to the heat engine.