| 摘要 |
An arrangement is specified for electronic commutation of a brushless DC motor having a magnetised paramagnetic rotor, a stator and a rotor sensor which, as rotor sensor, has only one Hall-effect switch (HS) and power transistors (T4, T5), which are arranged in pairs, for controlling the stator current. In order to prevent the power transistors (T4, T5) switching on at the same time during the switching process, a capacitor (C5) is arranged between the bases of the power transistors (T4, T5) such that it is charged and discharged with opposite polarity during one switching cycle. If the arrangement is constructed as a unipolar arrangement, it has a link between two winding strands (Sp1, Sp2), which link consists of a low-value resistor (R10) and a capacitor (C7), or a zener diode instead of the capacitor (C7). <IMAGE> |
