| 摘要 |
The invention relates to a method for operating 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 bar (T-) and to one respective phase (U, V, W) of the electric machine (1). The coupling units (6) 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. A variable characterizing the current charging state of the respective power cells (5) is determined for all energy storage modules (4), and the coupling units (6) are controlled in accordance with a predefined desired output voltage for the respective power supply branch (3-1; 3-2; 3-3) and the current charging state of the power cells (5). |
