| 摘要 |
<p>A regulator for a dynamo comprises an input terminal (12) for connection to a dynamo output, an output terminal (14) for connection to a battery (15), a current sensing element (19) connecting said input terminal to said output terminal, reference voltage generating means (17, 18, 31, 32), a first resistive potential divider (33, 34) connected so that the voltage at its intermediate point depends on the voltage at the output terminal, an output stage (22, 23, 24) connected to supply current to a field winding (11) of the dynamo and a single voltage comparator (30) to which the reference voltage generating means and the intermediate points of the two resistive potential dividers are connected, a diode (37) being incorporated in the connection between the second potential divider and the comparator, said comparator being connected to the output stage, whereby the regulator normally operates to control the field current to provide a predetermined voltage at the output terminal, but the field current is overridingly reduced to prevent the current in the current sensing element exceeding a predetermined value.</p> |
