一种新型的基于D状态观测器的永磁同步电机无传感器驱动向量控制方法

New "D-State-Observer"-Based Vector Control For Sensorless Drive of Permanent-Magnet Synchronous Motors

本文提出了一种新的能用于凸极和隐极永磁同步电机无传感器向量控制方法。这种方法通过一种新型改进的磁链状态观测器来估计转子磁链相位,用于永磁同步电机无传感器向量控制,该状态观测器被称做D状态观测器。D状态观测器有以下几个很具吸引力的特征：1)建立电机数学模型不需要额外的稳态条件；2)它的维数为最小的二维；3)在较宽的运行范围内,唯一一个观测器增益为常量,容易设计；4)以一种非常简单的方式应用电机的参数；5)结构非常简单因而能在较低的计算量下实现。通过广泛的实验验证了该方法的有效性。

This paper proposes a new sensorless vector control method that can be applied to both salient-pole and nonsalient-pole permanent-magnet synchronous motors (PMSMs). The proposed method estimates phase of rotor flux by a newly developed flux-state observer for sensorless vector control of PMSMs, which is referred to as the 'D-state observer,' The D-state observer has the following attractive features: 1) it requires no additional steady-state condition for the motor mathematical model; 2) its order is the minimum second; 3) a single observer gain is simply constant over a wide operating range, and easily designed; 4) it utilizes motor parameters in a very simple manner; 5) its structure is very simple and can be realized at a very low computational load. Usefulness of the proposed method is examined and confirmed through extensive experiments.