FIELD: electricity.
SUBSTANCE: electric circuit of a motor vehicle comprises a mass line (M), a board circuit (R) with a battery (1), connected with the board circuit (R) and with the mass line (M) via the first branch (b1), comprising a switch (K1), and via the second branch (b2), comprising the switch (K2), an AC generator (3), connected with the battery (1), a starter and load elements (4), connected with the board circuit and with the mass line (M). This circuit additionally comprises a device for voltage maintenance, including a bridge (b3), which connects the branch (b1) with the branch (b2), and a capacitor connected with the bridge (b3) in the point between the third switch (K2) and the second branch (b2), and an inner power supply device (8) providing for current leakage into the second branch (b2) only during recharging of the capacitor (2).
EFFECT: higher cost-effectiveness and reliability.
20 cl, 3 dwg
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