Generator rotor and generator rotor winding connection method

Abstract

The embodiment of the invention provides a generator rotor and a generator rotor winding connecting method, and relates to the technical field of generator rotors. The generator rotor comprises a rotor body and conductors, and the rotor body is provided with N wire slots at intervals along a circumferential direction. Each wire slot comprises a first embedding position and a second embedding position which are arranged along the circumferential direction of the rotor body, and the first embedding position and the second embedding position are both embedded with two layers of conductors which are arranged at intervals along a radial direction of the rotor body. All the conductors form a conductor group together, an end-to-end bridging range of a lead end of the conductor group adopts 5n / 6 short-distance connection of a wave winding, and the end-to-end bridging range of a non-lead end of the conductor group adopts n+2 connection of the wave winding. According to the generator rotor, an open-circuit voltage is improved through a structure of the conductor in each wire slot, and a grid-connected rotating speed range is controlled to be 965-2035 rpm through a winding wiring mode so thata range requirement of a grid-connected rotating speed is not reduced while the open-circuit voltage of the generator rotor is improved.

Description

technical field [0001] The invention relates to the technical field of generator rotors, in particular to a method for connecting generator rotors and generator rotor windings. Background technique [0002] The doubly-fed wind turbine is a generator with variable speed and constant frequency operation. During normal operation, in order to ensure that the generator stator outputs a constant frequency and constant voltage voltage, it is necessary to use a converter to control the amplitude and phase of the current in the three-phase winding of the motor rotor. adjust. [0003] In order to reduce the temperature of the converter connected to the rotor end, it is generally necessary to increase the open circuit voltage of the motor rotor and reduce the normal operating current of the rotor winding under the premise of ensuring that the capacity of the converter remains unchanged. [0004] The increase of the existing open circuit voltage is generally achieved by increasing the ...

AI Technical Summary

Problems solved by technology

Under the condition that the magnetic flux remains constant and the number of connected windings increases, the open circuit voltage will inevitably increase, and after exceeding a certain limit, the speed range of the generator set will become smaller

Images