Electricity: single generator systems – Generator control – With excitation winding and/or circuit control
Patent
1981-05-01
1983-08-30
Hickey, R. J.
Electricity: single generator systems
Generator control
With excitation winding and/or circuit control
310168, 310184, 322 47, 322 73, H02K 300, H02K 1100, H02P 946
Patent
active
044019394
ABSTRACT:
The alternator has a stator (12) with a rotor (10) mounted for rotation therein. The armature and field windings (20, 22, 24; 18) are both carried on the stator. The rotor is mechanically driven so as to rotate within the stator. Both the rotor and stator have poles (14; 16) formed at regular spacings on facing surfaces thereof so that as the rotor is rotated, rotor poles rotate past the field poles which are formed on the stator. The rotor poles are regularly spaced about the rotor such that at certain rotor positions all rotor poles are opposed to alternate field poles. Field coils (18a, 18b) are provided, each wound about a corresponding one of the field poles. An excitation circuit (FIG. 4) applies an excitation potential to the field coils such that field coils about adjacent field poles produce oppositely directed magnetic fields. The polarity of the this excitation potential is reversed each time the rotor poles become opposed to alternate field poles. As the rotor rotates, the rotor poles alternately complete and break magnetic field paths between adjacent field poles. Armature coils (20a, 20b, 22b, 24a, 24b) are also provided, each wound about a portion of a corresponding field pole to provide induced voltages as a result of the completing and breaking of the magnetic field paths by the rotor poles. Since the rotor may be constructed entirely free of windings, the need for coupling electrical energy into or out of the rotor is eliminated.
REFERENCES:
patent: 2708733 (1955-05-01), MacFarlane et al.
patent: 3157810 (1964-11-01), Adkins
patent: 3173076 (1965-03-01), Adkins
patent: 3512026 (1970-05-01), Tiltins
patent: 3866110 (1975-02-01), Ruggeri
patent: 4075521 (1978-02-01), Nordebo
patent: 4218645 (1980-08-01), Kirsch et al.
American Institute of Electrical Engineers Manuscript paper No. 55-730.
Hickey R. J.
Sheller-Globe Corporation
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