Methods and apparatus for pitch control power conversion
AssigneeGeneral Electric Company
InventorsCyrus David Harbourt, Jeffrey Alan Melius, Amy Marlene Ridenour, David Gerard Wanner, Jr., Howard Ross Edmunds, Andrew Scott Wilkinson
Life of this patent
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Abstract
A method for powering a pitch motor drive system for at least one DC pitch motor of a wind turbine includes rectifying a voltage using a bridge circuit to thereby supply a DC link voltage to a bridge comprising active switching devices, and utilizing at least one link capacitor to smooth the DC link voltage and act as an energy sink and source for the DC pitch motor or motors.
Claims20
A method for powering a pitch motor drive system for at least one DC pitch motor of a wind turbine, said method comprising rectifying a voltage using a bridge circuit to thereby supply a DC link voltage to a bridge comprising active switching devices, and utilizing at least one link capacitor to smooth the DC link voltage and act as an energy sink and source for the at least one DC pitch motor.
A system for supplying power to at least one DC pitch motor of a wind turbine, said system comprising a bridge circuit coupled to a source of power and configured to produce a rectified DC link voltage, a bridge of active switching devices configured to switch the DC link voltage and supply the switched DC link voltage to the at least one DC pitch motor, and at least one link capacitor in circuit and configured to smooth the DC link voltage and act as an energy sink and source for the at least one DC pitch motor.
A wind turbine comprising a rotor having at least one blade operatively coupled to at least one DC pitch motor, and a power system comprising a bridge circuit operatively coupled to a source of power and configured to produce a rectified DC link voltage, a bridge of active switching devices configured to switch the DC link voltage and supply the switched DC link voltage to the at least one DC pitch motor, and at least one link capacitor in circuit and configured to smooth the DC link voltage and act as an energy sink and source.
Dependencies are inferred from the claim text.