電動汽車用內(nèi)置式永磁同步電動機的弱磁控制
[Abstract]:As a result of energy shortage and environmental pollution, electric vehicles are gradually gaining application. The high performance built-in permanent magnet synchronous motor (Interior Permanent Magnet Synchronous Motor,IPMSM) is widely used in the drive system of electric vehicles. The weak magnetic field control of .IPMSM can improve the power performance and speed range of electric vehicles under the condition of limited inverter capacity. In the electric vehicle drive domain receives the widespread attention. In this paper, the weak magnetic field control of IPMSM for electric vehicle is studied. The main research contents are: 1: 1. The classification and mathematical model of IPMSM are studied. It is pointed out that the hybrid type combines the advantages of radial and tangential equations, and it is easier to expand the weak magnetic field. The mathematical model of IPMSM in three-phase stationary and two-phase rotating orthogonal coordinate systems is given. The principle of weak magnetic field control of IPMSM is studied. It is pointed out that IPMSM adopts maximum torque per ampere (Maximum Torque Per Ampere,MTPA control in constant torque operation region and weak magnetic field control in constant power operation region. The influence of permanent magnet flux chain and DQ axis inductance on weak magnetic field control performance is analyzed. ANSYS Maxwell 2D finite element analysis software is used to analyze the internal magnetic field of IPMSM. The results show that the magnetic field of IPMSM has magnetic circuit saturation and cross coupling effect, and the inductance parameters of the motor vary with the change of dq-axis current. The three dimensional curve diagram. 4 of the DC Q axis inductance with the DC Q axis current variation is also given. The weak magnetic field control scheme of IPMSM based on constant inductance parameter and variable inductance parameter is studied, and simulated in Matlab/Simulink environment, and the results of the two cases are compared. It is concluded that when the inductance parameter of the motor changes, The weak magnetic field control scheme based on variable inductance parameter can realize the weak magnetic field control of IPMSM well, and the dynamic and static performance of the system is better.
【學位授予單位】:青島科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM341;U469.72
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