Patent ID: 9106161
Filing Date: 2015-08-11
Classification: B60L,H02J,H02M,H02P,Y02T

Abstract:
1. A method for setting a desired output voltage of a power supply branch of a controllable energy store, which is used for controlling and supplying electrical energy to a n-phase electric motor, where n≧1, the controllable energy store having n parallel power supply branches, which each have at least two serially connected energy storage modules which each include at least one electrical energy storage cell having an assigned, controllable coupling unit, the n parallel supply branches each being connectible to a reference bus on one side, and connectible, on the other side, to phases of the electric motor, respectively, the method comprising: bypassing, using the coupling units, the respectively assigned energy storage cells or switching the respectively assigned energy storage cells into the respective power supply branch, as a function of control signals, at least one of the coupling units being driven by pulses in such a manner that an arithmetic mean of an output voltage of a power supply branch corresponds to a desired output voltage, the energy storage respectively assigned to the at least one coupling unit being switched into the respective power supply branch for a duration of a pulse, and being bypassed during a pause time.