Hybrid alternator
Patent 5397975 Issued on March 14, 1995. Estimated Expiration Date: 
June 14, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 14, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2516114 2990508 3411027 3508095 3512075 3566251 3609514 3671788 3676764 Compound AC generator InventorAssigneeApplicationNo. 077248 filed on 06/14/1993US Classes:322/46, Combined permanent magnet and wound field structure310/181Combined permanent and electromagnetExaminersPrimary: Peckman, KristineAttorney, Agent or FirmInternational ClassH02P 009/14AbstractA 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. | |
