能够校正相位误差的感应电机全阶磁链观测器

Full Order Flux Observer for Induction Motor With Phase Error Correction

感应电机的传统全阶磁链观测器,采用预估校正法进行离散时转子磁链估计相位的误差较小。但是电机高速运行时,随着载波比的减小,估计相位误差会随之增大,进而引起电机控制性能下降。有鉴于此,通过分析磁链相位误差的影响以及电机控制变量之间的相互作用关系,推导出一种具有相位误差自校正功能的改进全阶磁链观测器。最后在感应电机实验平台上验证了改进全阶观测器的有效性。

The traditional full order flux observer of the induction motor has a small error in the phase estimation of the rotor flux when discretized by the estimation correction method.However,when the motor is running at high speed,as the carrier ratio decreases,the estimated phase error will increase,resulting in a decrease in motor control performance.In view of this,an improved full order flux observer with phase error self-correction function is derived based on analyzing the influence of flux phase error and the interaction relationship with motor control variables.Finally,the effectiveness of the improved full order observer is verified on the experimental platform of induction motor.