| CPC H02M 7/5387 (2013.01) [H02M 1/08 (2013.01); H02M 7/487 (2013.01); H02M 7/53871 (2013.01)] | 9 Claims |
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1. An inverter unit, comprising:
a plurality of load bridges;
each of the load bridges has a first and a second load branch, via which a node point of the respective load bridge which is connected to a load is connectable to a first and a second potential;
each of the load branches has at least one semiconductor switch;
wherein each respective node point is connected to said first potential (P1) via a respective first resistance circuit of a resistance series circuit;
a respective tap-off point of the resistance series circuit is connected via a respective second resistance circuit of the resistance series circuit to the respective node point, and via a respective third resistance circuit of the resistance series circuit to the second potential;
the respective tap-off point is further connected to a monitoring device which determines a difference between a potential which is tapped-off at the tap-off point and the second potential;
the monitoring device is connected to a control device for the load bridges and, in at least one operating state, wherein one of the two load branches of a respective load bridge is actuated, transmits a signal to the control device, from which it is determined whether the difference between the potential which is tapped-off at a respective tap-off point and the second potential lies outside a voltage range which is predefined by an actuation state of the two load branches of the respective load bridge; and
wherein the control device, upon actuation of the load bridges, considers the signals which are transmitted thereto by the monitoring device.
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