| 摘要 |
<p>The circuit has a control path connected in parallel with each of the 2 series power semiconductors (T1, T2) of the current regulator, containing a resistive voltage divider (R11, R21; R12, R22) in series with a capacitor (C21, C22) and a diode (D1, D2). The junction between each capacitor and diode is coupled via a respective resistor (R31, R32) with a circuit reference potential (U+, U-), the voltage divider tap-off points (A1, S2) coupled to the semiconductor control inputs (G), so that the latter conduct in response to an overvoltage. The switching threshold for overvoltage limitation is determined by the voltage divider characteristics.</p> |
