| 摘要 |
The invention relates to a system for charging at least one power cell (5) in a controllable energy store (2) used for controlling and supplying electric power to an n-phase electric machine (1), where n = 1. The controllable energy store (2) has n parallel power supply branches (3-1, 3-2, 3-3), each of which includes at least two serially connected energy storage modules (4). Each energy storage module comprises at least one electric power cell (5) having an associated controllable coupling unit (6) and is connected to a reference bus (T-) and to one respective phase (U, V, W) of the electric machine (1). The coupling units (6) disconnect the respective power supply branch (3-1, 3-2; 3-3), bridge the associated power cells (5), or connect the associated power cells (5) to the respective power supply branch (3-1, 3-2, 3-3) in accordance with control signals. The power supply branches (3-1, 3-2, 3-3) of the controllable energy store (2) and the phases (U, V, W) of the electric machine (1) are connected to an intermediate DC circuit (10) by means of a controllable bidirectional n-phase rectifier unit (9). The reference bus (T-) of the controllable energy store (2) is connected to a reference bus (B) of the intermediate DC circuit (10). The intermediate DC circuit (10) can be electrically connected to a charging device (12). |
