| 摘要 |
The invention relates to a method and circuit arrangement for controlling the motor current in an electric motor (M), in particular a stepper motor, by means of a chopper method, by means of which method/circuit arrangement the motor (M) is operated with a coil current that follows a target coil current substantially more accurately at least at the zero crossing of the coil current, and by means of which method/circuit arrangement a good symmetry of the sinusoidal wave shape of the coil current with respect to the zero crossing of the coil current is achieved. Said method is achieved in particular by means of the active control of the coil current both in the direction of a predefined target coil current and opposite the direction of said predefined target coil current with respect to upper or lower desired current values and a lowering or increasing of the upper or lower desired current values. |
