Patent ID: 7489047

Claim:
A low cost electric power generating apparatus for decentralized power supply, consisting essentially of a permanent magnet type electric power generator driven by revolutions of a windmill or a waterwheel, said power generator comprising a first insulated winding and a second insulated winding, said first winding having a smaller number of turns than said second winding, said first winding producing a lower induced voltage than said second winding due to said smaller number of turns, said first winding being connected to a first rectifier which rectifies an alternating current power input from said first winding to a direct current power output of the first rectifier, said second winding being connected in series to a saturated reactor, said reactor comprising a core that becomes saturated as alternating current power input from said second winding to said core is increased to exceed a certain value, and then the inductance value of the reactor decreases gradually as the alternating current power input to said core from said second winding increases, said saturated reactor being connected to a second rectifier which rectifies an alternating current power input from such saturated reactor to a direct current power output of the second rectifier, and the direct current power outputs of said first rectifier and said second rectifier being connected in parallel, so that when the number of the revolutions is below a specified value, output from the second winding is used, and when the number of the revolutions exceeds said specified value, output from the first winding and output from the second winding are used, and a total output from the first winding and the second winding is approximately equal to the maximum output curve relative to the number of the revolutions.