| 摘要 |
According to the invention, in order to improve the reliability of a functional test of a holding brake (2) of an electric motor (1), the phase currents (isu, isv, isw) are varied, such that the current space vector (is) is rotated while the holding brake (2) is closed, such the current space vector (is) is normal to the rotor flux direction (d) at least once. |
