Telescopic double-rotor wind wheel electric excitation mode and its control system and its electric machine

Abstract

This invention relates to a telescopic dual-rotor wind-electric excitation mode, its control system and its motor, in which, a magnet inner rotor rotating corresponding to a stator is set on the sub-drive shaft of the generator and driven by it, a ring rotor driven by the primary drive shaft and rotating against the stator is set on the primary drive shaft, and the ring rotor is in the structure of surrounding the magnet inner rotor and rotating around it, the pole logarithm of the inside winding of the ring rotor is the same with the magnet inner rotor as Pe and the pole logarithm of the outside winding of the ring rotor is the same with the stator winding as Pg and the outer winding and the inside winding are connected in phase reversion, a primary vane rev testing device and a sub-vane rev testing device are set on the main and sub-vanes transferring rev signals to the integrated control device of the set, and the crab controller and the integrated control device are connected in the mode of controlling rotation of wind direction under the main vane.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a variable-speed and variable-frequency generator with a telescopic double-rotor excitation structure, an excitation control system and an excitation control method thereof. Background technique [0002] Known technology such as Chinese patent CN200510022771.1 discloses that the present invention discloses a variable speed and constant frequency method for wind power generation. The power Pw is input to the input shaft of the differential permanent magnet motor, and the differential mechanism of the differential permanent magnet motor performs power division or confluence to generate power flow Pg, which enters the stator winding of the differential permanent magnet motor and realizes constant speed and constant frequency power generation to the power grid through the feeder . Compared with the traditional method of variable speed and constant frequency, the present invention can signif...

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Problems solved by technology

[0005] It is known that the wind turbine transmits the power generated by the wind rotor under the action of the wind to the generator through the gearbox and makes it obtain a corresponding speed; usually the speed of the wind rotor is very low, which is far below the power generation required by the high-speed generator The speed must be realized through the acceleration of the gear pair of the gearbox; while the working conditions of the wind turbine unit are generally very poor, frequent failures of the gearbox are common

[0006] Products manufactured by conventional technologies have poor reliability, high maintenance costs, and low unit efficiency

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