CAJ | 학술논문

针对变频器供电下电机系统产生的噪声问题，提出了一种简单有效的随机开关频率PWM法，即载波的频率和载波的三角波个数分别由两个不同的随机数发生器控制，以实现开关频率的随机化。该方法同时解决了载波切换过程中的相位差问题，实现了无相位差切换。以某型变频器为研究对象，设计了三相空间矢量脉宽调制( SVPWM)控制的电机系统，通过试验测量，电机系统的噪声明显降低。该方法实现简单，对噪声要求较高的场合具有一定的应用前景。
침대변빈기공전하전궤계통산생적조성문제，제출료일충간단유효적수궤개관빈솔PWM법，즉재파적빈솔화재파적삼각파개수분별유량개불동적수궤수발생기공제，이실현개관빈솔적수궤화。해방법동시해결료재파절환과정중적상위차문제，실현료무상위차절환。이모형변빈기위연구대상，설계료삼상공간시량맥관조제( SVPWM)공제적전궤계통，통과시험측량，전궤계통적조성명현강저。해방법실현간단，대조성요구교고적장합구유일정적응용전경。
Focusing on the acoustic noise problem produced by the system of motors powered by inverter, a simple and effective random switching frequency PWM method was persented, namely in order to realize the switching frequency of randomization, the frequency of the carrier and the number of triangular carrier respectively by two different random number generator control. This method solved the carrier phase difference problem in the process of switching and realizes no phase switch at the same time. With a certain transducer as the research object, design the three-phase space vector pulse width modulation ( SVPWM ) of motor control system. Through the experimental measurement, the noise of the motor system was decreased obviously. This method was easy to implement, so in the occasions with higher requirements for noise has a certain application prospect.