Patent ID: 7554303

Claim:
A controller of a permanent magnet generator, comprising: a rotor shaft rotatably supported by a housing; a rotor fixed to the rotor shaft, and mounted with a plurality of permanent magnet members on an outer periphery side; and a stator disposed at the outside of the rotor and wound with a winding coil; wherein the winding coil of the stator is formed of a power coil and a control coil connected in series to the power coil and larger in the number of windings than the power coil, and a power terminal is provided at least between the power coil and the control coil, and a switch for letting flow a part of a current generated in the power coil to the control coil and a controller for controlling a current amount flowing into the control coil by controlling ON/OFF of the switch so that a generated voltage is controlled to a voltage set in advance in response to a detection signal from a sensor for detecting the generated voltage by the power coil are provided.