Hybrid alternator with voltage regulator

Details Hybrid alternator with voltage regulator Hybrid alternator with voltage regulator

1994-06-06

1996-03-26

Stephan, Steven L.

Electricity: single generator systems

Automatic control of generator or driving means

Voltage of generator or circuit supplied

322 29, 322 46, 310181, H02H 706

Patent

active

055023681

ABSTRACT:
A hybrid alternator includes a stator and a rotor, with the rotor having longitudinally separate wound field and permanent magnet rotor portions. A rotor excitation circuit applies a forward polarity to the wound field rotor portion to increase output in a boosting mode at low RPMs and a reverse polarity to decrease output at high RPMs in a bucking mode to maintain a constant voltage output. Alternative embodiments combine a magnetic flux concentrating design for efficient low speed operation with integral strength for high speed capability. Dual voltage output is provided either through dual stator windings or through a voltage converter circuit. Single voltage output is provided using only one stator winding. A three state voltage regulator allows voltage regulation without inducing reverse currents onto the power bus in the lightly loaded or no battery conditions. The regulator has automatic interlocking to automatically turn on and off without risking damage to the vehicle electrical system.

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