多相电机的第一主动部分连接到具有控制设备的转换器。 控制设备使用目标速度值更新基本换向角，并确定提供给机器的电流和换向角的直轴和正交轴分量值。 目标和分量正交轴值被提供给确定正交轴电压分量的目标值的电流控制器的正交轴部分。 目标和分量电流值被提供给电流控制器的直轴部分，其确定直轴电压分量的目标值。 直轴和正交轴电压分量的目标值和换向角用于确定提供给转换器的目标输出电压。 使用正交轴和直轴电压分量的目标值确定的阻尼换向角来调节电压。

A first active part (2) of the electrical machine is switched on by means of a converter (3) to a supply voltage (U) and thereby supplied with currents (IR, IS, IT) of a three-phase system. A control device (4) is given a speed setpoint (v *). Based on the speed setpoint (v *) writes the controller (4) a Basiskommutierungswinkel (ε1) continued. On the basis of the currents (IR, IS, IT) of the three-phase system and a commutation angle (ε), it determines a longitudinal current (ID) and a cross current (IQ), which are both based on a second active portion (11) of the electrical machine. The control means (4) leads to a cross-flow set point and a cross current (IQ) a cross-flow regulator (13), which determines therefrom a cross voltage value (UQ *). The control means (4) leads to a longitudinal current setpoint value (id *) and the longitudinal current (ID) a longitudinal current regulator (15), which determines therefrom a longitudinal voltage (UD *). The control device (4) determined based on the longitudinal voltage setpoint (UD *), the transverse voltage setpoint (UQ *) and the commutation angle (ε) for the inverter (3) of the first active part (2) to be output voltages (UR *, US *, UT * ) of a three-phase system characteristic data and outputs them to the inverter (3). The control device (4) determines the commutation angle (ε) using the Basiskommutierungswinkels (ε1) and a Dämpfungskommutierungswinkels (ε2), they using both the transverse voltage setpoint (UQ *) and the longitudinal voltage setpoint (UD *) determined.