Patent ID: 11923798
Assignee: SEW-EURODRIVE GMBH & CO. KG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A drive system, comprising:
an electric motor;
an inverter having an AC-voltage-side terminal adapted to feed the electric motor;
a first series circuit, including a brake resistor and a first controllable semiconductor switch, connected at a DC-voltage-side terminal of the inverter;
a second series circuit, including an impedance and a controllable second semiconductor switch, connected and/or switched in parallel with the first series circuit; and
a signal electronics connected to a voltage acquisition device adapted to acquire a voltage applied at the DC-voltage-side terminal of the inverter, the signal electronics being configured to generate an actuation signal for the first semiconductor switch and an actuation signal for the second semiconductor switch to close the first semiconductor switch when the voltage exceeds a first threshold value, to open the first semiconductor switch when the voltage exceeds a third threshold value, and to close the second semiconductor switch when the voltage exceeds a fourth threshold value.