一种磁通控制的高速马达驱动系统

A SUPER-HIGH-SPEED MOTOR DRIVE SYSTEM WITH MAGNETIC FLUX CONTROL

本文将磁通轨迹ＰＷＭ控制策略运用于中，高频调速控制中，实现了低频到中高频率范围的正弦波输出。为了扩大频率的输出范围，文中提出了一种基于原控制策略的高频控制方法。使得输出的基波频率得到进一步提高，并应用于所设计的实验调速系统中。实验系统采用新型功率器件ＩＧＢＴ，并以高性能单片机Ｈ８／５３２作为ＣＰＵ构成调速率统的主控部分，实现了全数字化控制。系统在小型异步电动机上做了部分实验，结果表明．电压波形的谐波含量是比较小的。己达到的主要技术指标：输出基波频率最高到２０００Ｈｚ，开关频率１０ｋＨｚ以上。

PWM technique using microcomputer has been widely used in motor control system.However,the computing time delay,as well as high-switching frequency,becomes a seriousobstacle in their application to super一high-speed drive systems,In this paper,a magneticflux PWM control method for digital super-high-speed induction motor drive system is pro-posed.It is shown that the proposed strategy has a simple PWM switching pattern by con-trolling the voltage space vectors. Some experimental results,which were obtained on asmall squirrel-cage induction motor driven by the system,show that the system is with lessharmonics in voItage and less distortion of stator current.