×

Drive system and method for operating such a drive system

  • US 8,988,034 B2
  • Filed: 07/17/2012
  • Issued: 03/24/2015
  • Est. Priority Date: 07/18/2011
  • Status: Active Grant
First Claim
Patent Images

1. A drive system for an electric motor, comprising:

  • a connection for a battery,an inverter having an input side connected to an intermediate circuit having a DC intermediate circuit voltage and an output side having a connection for the electric motor, said intermediate circuit comprising an intermediate circuit capacitance and a first thyristor connected directly in parallel with the intermediate circuit capacitance and configured to be activated by a monitor incorporated in or assigned to the drive system when a measure of the intermediate circuit voltage exceeds a predetermined threshold value so as to cause an armature short circuit of the electric motor,a rectifier having an input side connected at the output side of the inverter in parallel with the electric motor and the rectifier further having an output side providing a rectified DC output voltage which is a measure of the AC output voltage of the inverter, anda second thyristor connected to the output side of the rectifier and configured to be activated by a monitor incorporated in or assigned to the drive system when the rectified DC output voltage exceeds a predetermined threshold value.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×