Mechanical coupling type magnetic suspension wind turbine generator yaw system

Abstract

The invention discloses a mechanical coupling type magnetic suspension wind turbine generator yaw system which is applied to a large and medium wind turbine generator. The mechanical coupling type magnetic suspension wind turbine generator yaw system comprises a planet gear, a conical gear, an electromagnetic clutch, vertical suspension windings, horizontal suspension windings and yaw motors. Wind turbine generator yaw mechanical torque and yaw motor torque are coupled through planet gear torque to drive a wind turbine generator cabin to be yawed. The wind turbine generator yaw mechanical torque is taken from electric generator front side wind turbine generator torque through the electromagnetic clutch and the conical gear with the fixed transformation ratio. The yaw motor torque is controlled by a bidirectional PWM converter during cabin suspension, cabin suspension is jointly controlled by the horizontal suspension windings and the vertical suspension windings, the cabin gravity is balanced through the horizontal suspension windings, the vertical suspension windings restrain off-centering, the yaw motors can work in the two modes including the electric mode and the regenerative braking mode through changes of the wind turbine generator yaw torque, and bidirectional energy flowing is completed through the PWM converter. According to the mechanical coupling type magnetic suspension wind turbine generator yaw system, the yaw power energy conversion link is omitted, the yaw power consumption is greatly reduced, and the wind energy use rate is improved.

Description

technical field [0001] The invention relates to a yaw system of a mechanically coupled magnetic levitation wind turbine, in particular to a yaw system applied to large and medium-sized wind power systems to realize accurate wind-facing of a nacelle. Background technique [0002] The yaw system of the wind turbine can make the wind turbine always face the wind, improve the utilization rate of wind energy of the wind turbine, and play a key role in ensuring the safe and stable operation of the wind turbine. At present, large and medium-sized wind power yaw systems are generally driven by multiple motors, which has high yaw power consumption and high failure rate, which restricts the development of large-scale wind power, especially offshore wind power. The reason is that the installation and maintenance of offshore wind power requires large ships and Assisted by helicopters, the high yaw failure rate leads to higher wind power costs. Invention patent 200910161406.7 discloses ...

AI Technical Summary

Problems solved by technology

At present, large and medium-sized wind power yaw systems are generally driven by multiple motors, which has high yaw power consumption and high failure rate, which restricts the development of large-scale wind power, especially offshore wind power. The reason is that the installation and maintenance of offshore wind power requires large ships and Helicopter assistance, high yaw failure rate leads to higher wind power costs

Invention patent 200910161406.7 discloses a magnetic levitation yaw device, which uses magnetic levitation drive technology to greatly reduce the yaw failure rate and maintenance costs. The yaw of the cabin is carried out under the stable suspension of the cabin, and the friction torque caused by the gravity of the cabin is reduced. ; However, due to the overturning torque of the wind turbine, the center of the yaw motor is shifted, the frictional moment between the yaw motor and the tower still exists, and the power consumption of the yaw is relatively large, especially the power of the yaw motor is completely from the generator Power generation, large yaw power consumption limits the further improvement of wind energy utilization

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