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US 2009/0267572 A1Published application
Current limitation for a double-fed asynchronous machine
AssigneeWoodward Seg GmbH & Co. KG
InventorsStephan Engelhardt, Andrzej Geniusz
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AssigneeWoodward Seg GmbH & Co. KG
InventorsStephan Engelhardt, Andrzej Geniusz
Estimating the term…
In a method and an apparatus for controlling the output or drawn active and reactive power of a double-fed asynchronous machine (5), the maintenance of a maximum permissible current (16) of the machine—without the use of a subordinate current controller—is ensured by virtue of the fact that, during the operation of the double-fed asynchronous machine, a maximum permissible desired value for the active power (10a) to be output or to be drawn and a maximum permissible desired value for the reactive power (10b) to be output or to be drawn are calculated with the aid of a model of the asynchronous machine from the maximum permissible current (16), preferably corrected at least using the actual value of the current to be limited of the machine, in such a way that the maximum permissible current (16) is not exceeded; The predetermined active and reactive power desired values are then limited to the calculated maximum permissible values.
1-29. (canceled)
A method of limiting a current in a double-fed asynchronous machine having an active power and a reactive power using reference values for the active power and the reactive power comprising the steps of:
Apparatus for limiting a current in a double-fed asynchronous machine having an active power and a reactive power using reference values for the active power and the reactive power, comprising:
Dependencies are inferred from the claim text.