| 摘要 |
The invention relates to a power supply device, particularly for a motor vehicle, with an internal combustion vehicle engine (FM), actuating a first rotary current generator (DG 1 ) and a internal combustion supply engine (VM), actuating a second rotary current generator (DG 2 ), whereby a controlled alteration switch (BS) connects the rotary current generator (DG 1, DG 2 ), which is currently in operation, to a first voltage converter (K 1 ), topping a secondary converter (K 2 ), the output voltage (UB) of which feeds low-voltage consumers (V) and an accumulator battery (AB), characterized in that the first voltage converter (K 1 ) is a direct-voltage generator with solid-state circuit elements (MOS), which is polyphase high-frequency pulse-length regulated, generating an intermediate direct voltage (UG), which is converted to the low output voltage (UB) by the second voltage converter (K 2 ), a direct-voltage regulator with a solid-state circuit element (MOS 1 ), which is high-frequency pulse-length regulated.
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