CLAIMS 1. A method for controlling a power inverter using a pulse width modulation, wherein the pulse width modulation has at least one discontinuous section with a phase angle in respect to a fundamental signal, said phase angle is controlled to minimize losses of said power inverterCLAIMS 1. A method for controlling a power inverter using a pulse width modulation, the pulse width modulation having at least one discontinuous section with a phase angle with respect to a fundamental signal, said phase angle is controlled to minimize losses of said power inverter
Characterised in that the phase angle is controlled by a phase lock loop. 2. Method according to claim 1, wherein the at least one discontinuous section is phase shifted to occur during peak amplitude of a current output of said power inverter. 3. Method according to precedent claims, wherein the discontinuous section is phase shifted to occur in an interval of -45 degrees to +45 degrees of the peak amplitude of a current output of said power inverter. 4. Method according to precedent claims, wherein the discontinuous section is phase shifted to occur in an interval of -30 degrees to +30 degrees of the peak amplitude of a current output of said power inverter. 5. Method according to precedent claims, wherein said phase lock loop is a zero crossing detection of a current signal of the power inverter. 6. Method according to claim 1 to 4, wherein said phase lock loop is a closed loop DQ - phase lock loop using a current signal of the power inverter as an input. 7. A power inverter having a controller with a modulator, using a pulse width modulation, wherein the pulse width modulation has at least one discontinuous section with a phase angle in respect to a fundamental signal, said phase angle is controlled by the controller to minimize losses of said power inverterCharacterized in that the phase angle is controlled by a phase lock loop. A method according to claim 1, wherein the at least one discontinuous section is phase shifted to occur during peak amplitude of a current output of said power inverter. 3. Method according to precedent claims, the discontinuous section is phase shifted to occur in an interval of -45 degrees to +45 degrees of the peak amplitude of a current output of said power inverter. 4. Method according to precedent claims, the discontinuous section is phase shifted to occur in an interval of -30 degrees to +30 degrees of the peak amplitude of a current output of said power inverter. Method according to precedent claims, said phase lock loop is a zero crossing detection of a current signal from the power inverter. The method according to claims 1 to 4, wherein said phase lock loop is a closed loop DQ - phase lock loop using a current signal from the power inverter as an input. 7. A power inverter having a controller with a modulator, using a pulse width modulation, the pulse width modulation has at least one discontinuous section with a phase angle with respect to a fundamental signal, said phase angle is controlled by the controller to minimize losses of said power inverter
Characterised in that the phase angle is controlled by a phase lock loop. 8. A power inverter according to claim 6, wherein the at least one discontinuous section is phase shifted to occur during peak amplitude of a current output of said power inverter. 9. A power inverter according to claim 7 to 8, wherein the discontinuous section is phase shifted to occur in the interval of -45 degrees to +45 degrees of the peak amplitude of a current output of said power inverter. 10. A power inverter according to claim 7 to 8, wherein the discontinuous section is phase shifted to occur in the interval of -30 degrees to +30 degrees of the peak amplitude of a current output of said power inverter. 11. A power inverter according to claim 7 to 10, wherein said phase lock loop is a zero crossing detection of a current signal of the power inverter. 12. A power inverter according to claim 7 to 10, wherein said phase lock loop is a closed loop DQ - phase lock loop using a current signal of the power inverter as an input. 13. A power inverter according to claim 7 to 12, wherein the power inverter is suitable for being used in a wind turbine generator.Characterized in that the phase angle is controlled by a phase lock loop. A power inverter according to claim 6, wherein the at least one discontinuous section is phase shifted to occur during peak amplitude of a current output of said power inverter. 9. A power inverter according to claims 7 to 8, wherein the discontinuous section is phase shifted to occur in the range of -45 degrees to +45 degrees of the peak amplitude of a current output of said power inverter. 10. A power inverter according to claims 7 to 8, wherein the discontinuous section is phase shifted to occur in the range of -30 degrees to +30 degrees of the peak amplitude of a current output of said power inverter. 11. A power inverter according to claims 7 to 10, wherein said phase lock loop is a zero crossing detection of a current signal of the power inverter. 12. A power inverter according to claims 7 to 10, wherein said phase lock loop is a closed loop DQ - phase lock loop using a current signal from the power inverter as an input. A power inverter according to claims 7 to 12, wherein the power inverter is suitable for being used in a wind turbine generator.