System for charging an energy store, and method for operating the charging system

摘要

A system for charging at least one energy reservoir cell in a controllable energy reservoir which serves to control and supply electrical energy to an n-phase electrical machine where n≧1. The controllable energy reservoir has n parallel energy supply branches that each have at least two energy reservoir modules, connected in series, that each encompass at least one electrical energy reservoir cell having an associated controllable coupling unit, and are connected to a reference bus and to a respective phase of the electrical machine. As a function of control signals, the coupling units interrupt the respective energy supply branch, bypass the respectively associated energy reservoir cells, or switch the respectively associated energy reservoir cells into the respective energy supply branch.

主权项

1. A system for charging at least one energy reservoir cell in a controllable energy reservoir which serves to control and supply electrical energy to an n-phase electrical machine, where n≧1, comprising:
n parallel energy supply branches that each have at least two energy reservoir modules connected in series that each encompass at least one electrical energy reservoir cell having an associated controllable coupling unit, each of the energy supply branches being connectable on the one hand to a reference bus, and connectable on the other hand to a respective phase of the electrical machine; wherein the coupling units are configured to interrupt the respective energy supply branch or bypass the respectively associated energy reservoir cells or switch the respectively associated energy reservoir cells into the respective energy supply branch, as a function of control signals; wherein the energy supply branches of the controllable energy reservoir and the phases of the electrical machine are connectable via a controllable n-phase bidirectional rectifier unit to a DC voltage link circuit; wherein the reference bus of the controllable energy reservoir is connectable to a reference bus of the DC voltage link circuit; and wherein the DC link circuit is electrically connectable to a charging device.