| 摘要 |
The invention relates to a method for detecting a sluggishness or blockage of an electric drive (3), which is controlled by means of a first power semiconductor component (7). The electric drive (3) can be operated both in the part-load range (pulse width modulation (PWM) timing signal < 100%) and in the full load range (PWM timing signal = 100%), both ranges being dependent on the timing of the PWM signal (29, 30). An evaluation circuit (37) is connected to a microcontroller (25). Pulses that are generated within a time range are detected in the evaluation circuit (37) in the current that flows over the first power semiconductor element (7) and the number of detected pulses A1*, A2* is compared with the number of expected pulses A1, A2.
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