| 摘要 |
The invention relates to a control circuit (1) for a three-phase asynchronous motor (2), wherein each of three net phases (L1, L2, L3) is connected to at least one of three stator windings (3.1, 3.2, 3.3) of the three-phase asynchronous motor (2) by way of a phase transistor (MP1, MP2, MP3). Each of the stator windings (3.1, 3.2, 3.3) is connected to an anode of a recovery diode (D1, D2, D3), wherein the cathodes of the recovery diodes (D1, D2, D3) are connected to a recovery collection potential (4), wherein each of the net phases (L1, L2, L3) is connected to the recovery collection potential (4) by way of a recovery transistor (MF1, MF2, MF3). The invention further relates to a method for controlling a three-phase asynchronous motor, wherein the recovery transistor (MF1, MF2, MF3) is turned on when the respectively associated net phase (L1, L2, L3) has a higher potential than each of the net phases (L1, L2, L3) of the two other recovery transistors (MF1, MF2, MF3). |
