Dynamic online hw-overcurrent-threshold-reduction dependent on the operation point
AssigneeValeo eAutomotive Germany GmbH
InventorsAndreas HELD, Alexander RAMBETIUS
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Abstract
A method of setting an AC overcurrent shutoff limit for an inverter of an electric motor and an inverter for an electric motor. The inverter includes power switches and output terminals for providing multiple AC currents for windings of the electric motor. A maximal allowed AC current or at least one measurement or estimation quantity based on which the maximal allowed AC current depends is determined. The overcurrent shutoff limit for the inverter is adapted in dependency of the maximal allowed AC current or the at least one measurement or estimation quantity.
Claims18
A method of setting an AC overcurrent shutoff limit for an inverter of an electric motor, the inverter comprising power switches and output terminals for providing multiple AC currents for windings of the electric motor, the method comprising the steps of:
- a) Determining a maximal allowed AC current or at least one measurement or estimation quantity based on which the maximal allowed AC current depends, and
- b) Adapting the overcurrent shutoff limit for the inverter in dependency of the maximal allowed AC current or the at least one measurement or estimation quantity.
An inverter for an electric motor, the inverter comprising power switches and output terminals for windings of the electric motor, wherein the inverter also comprises a control device for controlling the operating states of the power switches and wherein the control device is configured to:
- a) determine a maximal allowed AC current or at least one measurement or estimation quantity based on which the maximal allowed AC current depends,
- b) adapt an overcurrent shutoff limit for the inverter in dependency of the maximal allowed AC current or the at least one measurement or estimation quantity.
(canceled)
Dependencies are inferred from the claim text.