Patent ID: 7002317

Claim:
A method for providing substantially constant-voltage power for an electric distribution system using a matched reactance power generation system, the method comprising the steps of: providing a permanent magnet rotor type machine having a selected BEMF value and a selected machine inductance value, wherein an excitation of said machine is fixed and achieved by at least one permanent magnet embedded in a rotor assembly of said machine; selecting said BEMF value for said machine, wherein said BEMF value is selected at a first machine speed having a line-to-line peak voltage that is equal to a desired terminal voltage of said machine, said BEMF value having substantially equal amplitude to said desired terminal voltage at said first speed and wherein an electrical phase difference between said BEMF value and said terminal voltage is approximately zero; selecting said machine inductance value for said machine, wherein said machine inductance value is selected based upon both a machine reactance value and a frequency value as a function of a proportional increase in said selected BEMF value between said first machine speed and a second machine speed, wherein the terminal voltage and a phase current are in phase; and controlling said machine speed to provide a substantially constant terminal voltage for a variable power demand level.