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标题：永磁同步电机变工况下无速度传感器控制 |
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作者：冉艳，邓涛，李军营，等 |
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| 2019年第6期 访问次数：237次 |
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摘要：对于永磁同步电机(Permanent Magnet Synchronous Motor, PMSM)，无速度传感器检测转子位置因其系统成本低、可靠性高等优点，逐渐取代了传统的机械位置传感器。针对PMSM在低速运转波动大和高速运转平稳的特点，首先建立两种工况下的数学模型，提出基于旋转高频电压注入和滑模变结构的PMSM无速度传感器控制策略，并分别进行仿真分析。然后建立平均速度控制函数来进行两种控制策略之间的平滑切换，实现PMSM在全速范围内的无传感器调速控制。结果表明，两种PMSM无速度控制算法都能较好地跟踪电机转速，鲁棒性好，能较准确地估算出转子位置，验证了低速工况下基于高频电压注入的无位置传感器选用和高速工况下基于滑模变结构的无速度传感器选用的可行性。
Abstract: For permanent magnet synchronous motor (PMSM), speed sensorless detection of rotor position has gradually replaced the traditional mechanical position sensor because of its advantages of low cost and high reliability. In view of the characteristics of PMSM in low speed and stable running at high speed, this paper first established two mathematical models, and proposed a speed sensorless control strategy for pmsm based on rotating high frequency voltage injection and sliding mode variable structure. Simulation analysis was carried out respectively. Then the average speed control function was established to smooth switch between the two control strategies to realize the sensorless speed control of pmsm in the full speed range. The results show that the two PMSM speed control algorithms can track the motor speed well, have good robustness, and estimate the rotor position accurately. The feasibility of selecting a positionless sensor based on high frequency voltage injection at low speed and a speed sensor based on sliding mode variable structure at high speed was verified.
Key words: permanent magnet synchronous motor; variable conditions; sensorless speed control; |
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