| 摘要 |
<p>According to the invention, the regulator supplies excitation current both in addition and in subtraction, since the supplied current can vary not only in intensity, but also in direction, depending on the signal given by a control device, which is able to regulate the conduction of the regulator both as far as intensity and direction are concerned, according to the result obtained from the comparison between a reference voltage (124) and the voltage of the alternator itself, or, in any case, a part of it (123), said addition or subtraction been performed by electric or magnetic means.
<??>According to a preferred form of execution, the electronic device having a two-directional conduction, which achieves these performances consists of a TRIAC (210) which feeds an auxiliary winding in one direction or the other; the TRIAC is piloted, in turn, by a control circuit (122) which sends out a triggering signal being in relation to the voltage of the alternator (123) and to a reference voltage (124).
<??>In this form of construction the TRIAC can be replaced by two controlled diodes or by two transistors or similar means, being connected to each other in inverted parallel.
<??>According to another form of execution, the circuit of the electronic regulator is made with two controlled diodes, transistors or similar means, which send current having the same direction to two separate windings being wound in opposite directions.
<??>Yet another form of execution foresees the use of four controlled diodes, transistors or similar means which conduct in crossed pairs and feed a single auxiliary winding. </p> |
