On-board vehicular network method for efficient generator utilization
To utilize the full power capacity of alternators the alternator phases are connected through a transformer to the rectifier which provides rectified output to a battery. The transformer 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 to the battery/load combination. In accordance with one feature, the taps are on the primary, and a-c switches such as triacs are selectively energized as the speed of the generator changes; in accordance with another embodiment, the taps are on the secondary of the transformer, and unilaterally conductive switches, such as thyristors or SCRs, can be used, in parallel with the rectifier diodes of the rectifying array, and selectively fired as a function of speed. A nominal output alternator thus can provide secondary output currents. 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.
- Assignee:
- Robert Bosch GmbH (Germany, Federal Republic of)
- Patent Number(s):
- US 4419618
- OSTI ID:
- 6972056
- Resource Relation:
- Patent Priority Date: Priority date 3 Nov 1980, Germany, Federal Republic of (F.R. Germany); Other Information: PAT-APPL-313649
- Country of Publication:
- United States
- Language:
- English
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