Design And Analysis Of 2.64MW Half-direct Driven Permanent Magnet Wind Generator

Much attention has been attached to the utilization of wind energy,which is rich in resources and reserves,which greatly alleviate the shortage of fossil energy and environmental pollution.Improving the design and manufacturing technology of wind power generator as the core part of wind power has become a major task for researchers.In this paper,the advantages and disadvantages of various wind generators have been developed,and the key design techniques of semi direct drive permanent magnet synchronous wind generator with wide application prospect are analyzed and studied,In this paper,according to the design requirements of 2.64MW Half-direct drive permanent magnet synchronous wind generator,the design and structure of the motor is optimized,and its electromagnetic performance is analyzed and verified,The main work is as follows.According to the design requirements,complete the selection of permanent magnet synchronous wind power generator;determine the rotor magnetic circuit structure.Starting from the known motor technical parameters and design principle,determining the main dimensions of the motor stator,such as inner and outer diameter,the axial length of the motor.Through some key structural parameters of the motor,such as stator slot,air gap length,permanent magnet and magnetic isolation measures were analyzed and simulation by 2.64MW Half-direct drive permanent magnet synchronous wind turbine basic design scheme.The equivalent and assumption on the model of the motor,the cogging torque is analyzed and its general expression is obtained with the energy method and Fourier transform.The cogging torque variation and main factors influencing cogging torque are analyzed by analytical formula.In view of this motor are analyzed to change the width of the groove,changing the pole arc coefficient,influence of air gap ratio and rotor eccentricity on cogging torque,which is compared and validated by finite element simulation,and provides a basis for the further optimization of motor structure.Through the design to optimize the structure of the motor,the final designs was determined,and were on the no-load and rated load conditions are simulated using finite element simulation software Maxwell,the synchronous inductance is calculated.Finally,the two kinds of fault conditions of three-phase steady short-circuit and t three-phase sudden short-circuit are calculated,and the rationality of the design of the motor is verified.Through the simulation of mechanical generator frame,an end cover,shaft and Rotor punching sheet and other key components,analysis of key parts of motor strength and stiffness is satisfied,verify the motor structure design,but also to optimize the structure of motor design provides the guidance suggestion...