| 摘要 |
An electric motor vehicle auxiliary unit (13) comprising an electronically commutated drive motor (16), the motor coils (17) thereof being energized by an electronic commutator arrangement (14), wherein the commutator arrangement (14) has a control unit (30) and multiple power semiconductors (T1-T4) which are controlled by the control unit (30), a motor current tap (23) is arranged in the course of the motor current path (21) at which current tap a voltage signal UM proportional to the motor current IM drops during motor energization, and a high-pass filter (22) is arranged between the motor current tap (23) and the control unit (30), the input signal of which high-pass filter is the voltage signal UM and the output signal of the high-pass filter is a control signal for the control unit (30), by means of which, following the input of a peak signal (T), the following pole reversal (K) is triggered after a delay (dt). |
