Patent ID: 8907509

Claim:
A current controller device using a vector control algorithm for controlling a conversion of a DC power into an AC power and/or vice versa by an inverter, comprising: a first current demand input for receiving a first current demand signal; a second current demand input for receiving a second current demand signal; a first current feedback input for receiving a first current feedback signal representing an AC current of the AC power; a second current feedback input for receiving a second current feedback signal representing an AC current of the AC power; a first voltage feedback input for receiving a first voltage feedback signal representing an AC voltage of the AC power; a second voltage feedback input for receiving a second voltage feedback signal representing an AC voltage of the AC power; a first voltage demand output for outputting a first voltage demand signal; a second voltage demand output for outputting a second voltage demand signal; a controller for producing the first voltage demand signal and the second voltage demand signal based on the first current demand signal, the second current demand signal, the first current feedback, the second current feedback, the first voltage feedback and the second voltage feedback; an open loop control loop gain depending on frequencies of the first and the second current feedback signals; a first filter provided at the first current feedback input having a first filter characteristics; and a second filter provided at the second current feedback input having a second filter characteristics, wherein the first and the second filter characteristics are configured to reduce frequencies of the first and second current feedback signals at which the frequency dependent open loop control loop gain would become greater than unity and would have a phase less than or equal to minus 180°.