P7-09 Overvoltage current limit

Setting range: 0.0 – 1.0 – 100%

This function discharges the DC link in generator mode. The maximum motor speed is limited here to 120% of P1-01 or 120% of P1-09 (the highest limit value is used in each case).

When set to "0.0", this function is deactivated.

Procedure:

  • The motor with high inertia is decelerated. Regenerative energy flows back to the inverter.
  • The DC link voltage increases and reaches the UDCmax level.
  • To discharge the DC link, the inverter delivers current (P7-09) and the motor accelerates again.
  • The DC link voltage falls below UDCmax again.
  • The motor is further decelerated.