Patent ID: 8981712
Filing Date: 2015-03-17
Classification: H02M

Abstract:
1. A submodule for charging or discharging an energy store, the submodule comprising: output terminals; a capacitor unit; a power semiconductor circuit having power semiconductors which can be switched on and off, said capacitor unit and said power semiconductor circuit connected to one another such that, depending on a driving of said power semiconductors in said power semiconductor circuit, at least a voltage drop across said capacitor unit and a zero voltage being generated selectively at said output terminals of the submodule; a DC-to-DC converter connected to said capacitor unit; and an energy store connected to said DC-to-DC converter, the DC-to-DC converter configured to convert a capacitor voltage drop across said capacitor unit into a charging voltage, required for charging said energy store, and to convert a discharging voltage drop across said energy store during discharge into the capacitor voltage.