Patent ID: 8456877

Claim:
An inverter system ( 1 ) with several inverters ( 2 ), each of which having at least one control unit ( 6 ), with at least one line ( 7 ) each being provided between the inverters ( 2 ) for data exchange, wherein the data lines ( 7 ) between the inverters ( 2 ) are realized by optical waveguides, each inverter ( 2 ) has a communication device ( 8 ) which is connected to a control unit ( 6 ) of the inverter ( 2 ) and to the data lines ( 7 ) of two neighboring inverters ( 2 ), and which has a switching device ( 13 ), a transmitter ( 9 ) and a receiver ( 10 ), wherein the transmitter ( 9 ) is connected to the switching device ( 13 ) via a transmission line ( 11 ) and the receiver ( 10 ) is connected to the switching device ( 13 ) via a receiving line ( 12 ), and wherein the transmitter ( 9 ) of an inverter ( 2 ) is connected to the receiver ( 10 ) of the downstream inverter ( 2 ) and the receiver ( 10 ) of the inverter ( 2 ) is connected to the transmitter ( 9 ) of the previous inverter ( 2 ), the switching device ( 13 ) of each inverter ( 2 ) being configured to switch the data lines ( 7 ) by a switching data packet starting from an inverter ( 2 ) defined as the master and transmissible step by step unidirectionally from one inverter ( 2 ) to the next inverter ( 2 ) between a ring system used during a starting procedure of the inverter system ( 1 ), in which all inverters ( 2 ) are interconnected in a ring via the data lines ( 7 ) and the data are evaluated by the control unit ( 6 ) of each inverter ( 2 ) before being transmitted to the next inverter ( 2 ), and between a bus system, which is logically based on the ring system after completion of the starting procedure during a running operation of the inverter system ( 1 ), all inverters ( 2 ) being connected to a common bus formed by the data lines ( 7 ) and the data are sent substantially simultaneously and directly to all inverters ( 2 ) and the data are then evaluated by the control units ( 6 ) of all inverters ( 2 ), wherein a time window for transmitting data to the data line ( 7 ) is adapted to be assigned to each inverter ( 2 ) with the switching data packet, and the receiving line ( 12 ) is separated from the transmission line ( 11 ) for transmission in the time window.