Direct current motor for automotive engineering, has capacitor switched parallel to rotor winding in rotor, and inductor switched in series to condenser in stator, such that capacitor and inductor form resonance circuit of detection device

摘要

The motor has a stator, a rotor and a detection device for detecting revolution speed, where the rotor has a rotor winding which is associated with a battery voltage by a commutator and a brush. A capacitor (C0) is switched parallel to the rotor winding in the rotor, and an inductor (L) is switched in series to a condenser in the stator, such that the capacitor and the inductor form a resonance circuit of the detection device.