| 摘要 |
An electronic device 1 for electrically connecting and disconnecting, based on a command signal CMD, a first device terminal 11 and a second device terminal 12 is described. The device 1 comprises at least one main electronic switch M1, an electrical pre-charge circuit 2 and a measurement, command and diagnosis module 3. The main electronic switch M1 has a first electrical terminal D1 connected to the first device terminal 11, a second electrical terminal S1 connected to the second terminal of the device 12, and a main driving terminal G1. The main electronic switch M1 is configured to take, based on a driving signal DRV, depending on the command signal CMD and on an enabling signal ENB, a closed condition or an open condition, wherein the first electrical terminal D1 is respectively connected to or disconnected from the second electrical terminal S1. The pre-charge electrical circuit 2 is connected between said first 11 and second device terminal 12, and comprises at least one impedance element 21 and at least one pre-charge electronic switch M2, arranged mutually in series. The pre-charge electrical circuit 2 is configured to carry out, based on the command signal CMD, a pre-charge operation, aimed at equalizing the electric potentials (V1, V2) of the first and second terminals of the device, before the main electronic switch M1 takes a closed condition, upon of a transition from the open condition. The aforesaid main electronic switch (M1) and the electronic pre-charge switch (M2) are solid-state power switches (i.e., relays). The measurement, command and diagnosis module (3) is configured to detect a voltage difference ”V between the first 11 and the second device terminal 12, and to generate said aforesaid enabling signal ENB based on the detected voltage difference ”V. The measurement, command and diagnosis module 3 is further configured to generate, based on the detected voltage difference ”V and on the command signal CMD, a status signal STS indicative of a start phase, of an in-progress phase and of a completion phase of the pre-charge operation carried out by the pre-charge electrical circuit 2. |
