电驱可控震源驱动电机匹配设计与优化研究

Research on matching design and optimization of drive motor of electric drive vibroseis

电驱可控震源复杂的工况环境对驱动电机的性能提出了较高的要求。针对可控震源在行驶和激振工况下的动力需求,开展了驱动电机动力参数匹配设计,确定了驱动电机的主要设计参数;建立了驱动电机的二维有限元模型,采用子域法研究了电机在空载、额定工况下的磁通密度特性和谐波幅值,分析了电机磁通谐波畸变规律;开展了电机气隙长度优化设计以及电机转子结构的正交优化试验,得到了转子最优结构参数,并研制了电机样机。结果表明:在电机隔磁桥、永磁体与转子边缘之间区域的磁通密度波形畸变严重;永磁体与转子边缘之间区域的高次谐波对电机的影响较大,其3次谐波在基波中的占比高达83%;优化后电机效率可达96.8%。研究结果为电驱可控震源的优化提供了参考。

The higher performance requirements for the drive motor are put forward because of the complex operating environment of the electric drive vibroseis.Aiming at the power requirements of the vibroseis under driving and excitation conditions,the matching design of the drive motor's power parameters was carried out,and the main design parameters of the drive motor were determined;a 2D finite element model of the drive motor was established,the magnetic flux density characteristics and harmonic amplitude of the motor under no-load and rated operating conditions were studied using the subdomain method,and the law of harmonic distortion of the motor's magnetic flux was analyzed;the optimal design of the air gap length of the motor and the orthogonal optimization test of the motor rotor structure were carried out,and the optimal structural parameters of the rotor were obtained.Therefore,a motor prototype was developed.The results showed that the magnetic flux density waveform in the motor magnetic isolation bridge and the region between the the permanent magnet and the rotor edge was severely distorted;the high-order harmonics in the region between the permanent magnet and the rotor edge had a significant impact on the motor,the proportion of the third harmonic in the fundamental wave was as high as 83%;the efficiency of the optimized motor reached 96.8%.The research results provide a reference for the optimization of electric drive vibroseis.