摘要：本文分析了SPMSM电动机弱磁控制的原理，根据电动机的具体参数不同将SPMSM电动机分为3种类型，并分析了3种类型的判别依据。针对第三种类型的电动机，给出了某型号电动机工程实现的具体步骤，提出了避免开方的分区分段逼近法和避免失效控制的具体方案，并对这些方法进行了详细的分析；对SPMSM电动机第三类型电动机的控制进行了设计，给出整体控制框图。实验结果验证了本文所提方案。

关键词：SPMSM；MTPA；防失效控制；弱磁控制
Abstract: This paper analyzed the SPMSM motor field weakening control principle proposed discrimination based on analysis of the three types of the SPMSM motor was divided into three types, depending on the specific parameters of the motor. For the third type of motor, gave concrete steps to achieve a model electrical engineering, was proposed to avoid the square root partition the segmented approximation method and to avoid failure control program, carried out a detailed analysis of these methods; SPMSM the motor third type motor control design, the overall control block diagram was given. The experimental results verify the proposed program.

Key words: SPMSM；MTPA； anti-failure control；field weakening