| 摘要 |
<p>An electrical power supply which may be used with the electrical system of a motor vehicle. A first input (16) to be connected to a D.C. source (18) and a second input (12) to be connected to an A.C. source (11). The first input provided across a capacitor bridge including an input capacitor (24, 25) and output capacitor (27, 28) in parallel and diodes (23, 26) opposing discharge current from the capacitors to the first input (16). The output (30) is taken across the output capacitor (27, 28). The second input (12) provided in series with the input capacitor (24, 25). The voltage applied to the second input (12) with the charge in the input capacitor raise the charge in the output capacitor (27, 28) providing increased D.C. voltage at the output (30). Preferably, the capacitor bridge is modified to accommodate pairs of input and output capacitors to utilize both cycles of the A.C. source. Preferably a sensing means (29) and control means (54) is provided to control the voltage at the output (30).</p> |
