Method and device for driving an m-pulse inverter system, comprising a master-inverter and at least one slave-inverter

摘要

The invention relates to a method and device for driving an inverter system (2), comprising a master inverter (4) and at least one slave inverter (6) with an inverter control set (40). According to the invention, control signals (S1', ..., S6') are generated for the slave inverter (6) from the control signals (S1, ..., S6) for the master inverter (4) depending on determined phase-current actual value differences ( DELTA IR', ..., DELTA IT') in such a way that an uneven distribution of the load current among the sub-inverters (4, 6) is evened out. The low-order harmonics are reduced in this way, resulting in a reduction of the torque and rotational speed variations, and in good true running quality of the drive at low speeds. IMAGE