On-board vehicular network method for efficient generator utiliz

Details On-board vehicular network method for efficient generator utiliz On-board vehicular network method for efficient generator utiliz

1981-10-22

1983-12-06

Hickey, R. J.

Electricity: single generator systems

Combined control of generating means and load circuit

322 29, 322 90, 322 95, 320 61, H02P 904, H02J 714

Patent

active

044196180

ABSTRACT:
To utilize the full power capacity of alternators 1, the alternator phases are connected through a transformer 9 to the rectifier 4 which provides rectified output to a battery 8. The transformer 9 has tapped windings, the taps being placed in circuit with the alternator-rectifier network in dependence on a speed control signal, for example derived from the frequency of the alternator, to effect tap changing and matching of the internal impedance of the alternator 1 to the battery 8/load L combination. In accordance with one feature (FIGS. 2, 3), the taps are on the primary, and a-c switches such as triacs 15 are selectively energized as the speed of the generator changes; in accordance with another embodiment (FIGS. 4, 5), the taps are on the secondary of the transformer, and unilaterally conductive switches, such as thyristors or SCRs 48, can be used, in parallel with the rectifier diodes 47 of the rectifying array, and selectively fired as a function of speed. A nominal 35 A output alternator thus can provide secondary output currents which, in one embodiment (FIG. 3) may go to over 80 A or, in the other (FIG. 5), to over 55 A, the closeness of matching and eventual output power depending on the voltage rating of the alternator and the number of taps on the transformer, and hence the degree of match obtainable.

REFERENCES:
patent: 3378755 (1968-04-01), Sawyer
patent: 3602798 (1971-08-01), Shibata et al.
patent: 3710228 (1973-01-01), Higashino
patent: 3932765 (1976-01-01), Townsend
patent: 4066957 (1978-01-01), Seeger

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