CAJ | 학술논문

为了研究磁浮系统中的恒速驱动及适时速度调节性能，根据Maxwell方程及电机的矢量控制原理，以磁浮系统中的直线感应电动机为研究对象，在其推力与初级绕组中电流矢量关系的基础上，设计了无速度传感器矢量控制器，并利用Matlab／Simulink软件验证控制器的正确性。研究结果表明：当速度在小范围内受扰动时，控制器运用电流内环、电压外环控制方式自动调节整流器的直流母线电压，调节时间小于10 ms；当控制器接收到指令速度时，改变逆变器的频率，该频率改变电机同步速，达到调速的目的，调节时间小于50 ms，表明在工频小于3个周期时，满足磁浮系统的控制要求。
위료연구자부계통중적항속구동급괄시속도조절성능，근거Maxwell방정급전궤적시량공제원리，이자부계통중적직선감응전동궤위연구대상，재기추력여초급요조중전류시량관계적기출상，설계료무속도전감기시량공제기，병이용Matlab／Simulink연건험증공제기적정학성。연구결과표명：당속도재소범위내수우동시，공제기운용전류내배、전압외배공제방식자동조절정류기적직류모선전압，조절시간소우10 ms；당공제기접수도지령속도시，개변역변기적빈솔，해빈솔개변전궤동보속，체도조속적목적，조절시간소우50 ms，표명재공빈소우3개주기시，만족자부계통적공제요구。
For investigating the performance of constant and adaptive speed regulation of cascaded linear induction motor (LIM)in maglev system,a new speed-sensorless vector controller was designed based on the Maxwell equations by analyzing the relationship between the thrust of the LIM and the current vector of the primary winding. The reasonability and the effectiveness of this controller were verified by numerical simulation using Matlab/Simulink. The results show that when facing small perturbation of the speed,the controller can automatically adjust the DC bus voltage of the rectifier through the inner current loop and the outer voltage loop to stabilize the speed within 10 ms. When receiving the reference speed value,the frequency of the AC side of the inverter is regulated to obtain a suitable value of the synchronous speed;the regulating time is less than 50 ms and within 3 cycles of power frequency,meeting the requirements of control performance in maglev system.