| 摘要 |
An apparatus for controlling an AC power supply (2) for an AC electric motor (4), said AC power supply being derived from a DC voltage (6). The apparatus comprises a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data (ID, IQ) based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage, modified on the comparison for supplying of the motor control signal which is based on the motor current data. |
