| 摘要 |
<p>The circuit has several phases, where signals (U1-U3), which are proportional to respective phase currents (I1-I3), are applied to a transducer circuit for each phase current. The transducer circuit acts as a low pass filter (1) below and within a range of threshold frequency, and acts as a power splitter (2) above the threshold frequency. The outputs of the transducer circuit are applied to a maximum creator for forming maximum of outputs of the transducer circuit. The maximum is connected to a comparator (4), in which maximum is compared with a reference value.</p> |
