Patent ID: 6160384
Filing Date: 2000-12-12
Classification: H02K

Abstract:
A magneto-equipped power device comprising:a magneto including a magnet field on a side of a rotor and armature coils on a side of a stator and including a field adjusting excitation coil for flowing a field adjusting magnetic flux through rotor-side magnetic poles and stator-side magnetic poles when it is excited, said field adjusting excitation coil being arranged on the side of the stator;a rectification circuit for rectifying an output of said magneto to feed it to a load;an output short-circuiting circuit for substantially short-circuiting an output of said armature coils of said magneto through output short-circuit switches turned on when a control signal is fed thereto, to thereby flow a DC short-circuit current through said output short-circuit switches; anda switch control circuit for feeding a control signal to said output short-circuit switch when a state of said load that requires to restrain an output of said magneto is detected;said field adjusting excitation coil including a field decreasing excitation coil and a field increasing excitation coil;said field decreasing excitation coil being connected to an intermediate portion of said output short-circuiting circuit so as to be excited by a DC circuit-short current flowing through said output short-circuit switches;said field increasing excitation coil being connected to an intermediate portion of a current feed circuit for a load current so as to be excited by a DC load current flowing from said rectification circuit through said load;said magnet field of said rotor of said magneto being decreased when said field decreasing excitation coil is excited to generate the field adjusting magnetic flux and increased when said field increasing excitation coil is excited to generate the field adjusting magnetic flux.