Patent ID: 11921538
Assignee: AUDI AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method, comprising:
operating at least two inverters connected to a direct current network, wherein the at least two inverters each include a respective switching element and a respective control unit connected to a common communication bus;
controlling, with the control unit of each of the at least two inverters, each inverter with a respective clock signal, wherein the common communication bus is connected to at least one further control unit;
sending, at different times with the further control unit, a message of a message type via the common communication bus;
triggering, by reception of the message of the message type in the control unit of the at least two inverters, a synchronization of the clock signal controlling each of the at least two inverters;
counting, with the control unit of each of the at least two inverters, control operations carried out after the synchronization of the clock signal controlling each of the at least two inverters, wherein the control unit of a first one of the at least two inverters is a master control unit;
transmitting, with the master control unit, to the control unit of a second one of the at least two inverters at a point of time count information that describes the control operations counted at the point in time by the master control unit, wherein the first one of the at least two inverters is different from the second one of the at least two inverters;
receiving the count information with the control unit of the second one of the at least two inverters; and
controlling, with the control unit of the second one of the at least two inverters, the switching element of the second one of the at least two inverters as a function of the count information and the control operations counted by the control unit of the second one of the at least two inverters.